Dilation Health Dictionary

Dilation: From 1 Different Sources


A term that is sometimes used as an alternative to dilatation.
Health Source: BMA Medical Dictionary
Author: The British Medical Association

Mydriasis

Dilation of the pupil... mydriasis

Alterative

A term applied in naturopathic, Eclectic, and Thomsonian medicine to those plants or procedures that stimulate changes of a defensive or healing nature in metabolism or tissue function when there is chronic or acute diseases. The whole concept of alteratives is based on the premise that in a normally healthy person, disease symptoms are the external signs of activated internal defenses and, as such, should be stimulated and not suppressed. Sambucus (Elder), as an example, acts as an alterative when it is used to stimulate sweating in a fevered state. Without a fever or physical exertion, Sambucus tea will increase intestinal, lung, and kidney secretions. With fever or exercise, the buildup of heat from combustion, and the dilation of peripheral blood supply, it takes the defense response to the next stage of breaking a sweat. You might have sweated eventually anyway, but you may be one of those people who doesn’t perspire easily, and a diaphoretic such as Sambucus will act as an alterative for you by stimulating the next stage of defenses sooner than you would have on your own. The term alterative is sometimes inaccurately used as a synonym for “blood purifier,” particularly by nature-cure neo-Thomsonians such as Jethro Kloss and John Christopher. “Blood purifier” is a term better applied to the liver, spleen, and kidneys, not to some dried plant.... alterative

Beer

(Ale)

Nutritional Profile Energy value (calories per serving): Low Protein: Moderate Fat: None Saturated fat: None Cholesterol: None Carbohydrates: High Fiber: None Sodium: Low Major vitamin contribution: B vitamins Major mineral contribution: Phosphorus

About the Nutrients in This Food Beer and ale are fermented beverages created by yeasts that convert the sugars in malted barley and grain to ethyl alcohol (a.k.a. “alcohol,” “drink- ing alcohol”).* The USDA /Health and Human Services Dietary Guidelines for Americans defines one drink as 12 ounces of beer, five ounces of wine, or 1.25 ounces of distilled spirits. One 12-ounce glass of beer has 140 calo- ries, 86 of them (61 percent) from alcohol. But the beverage—sometimes nicknamed “liquid bread”—is more than empty calories. Like wine, beer retains small amounts of some nutrients present in the food from which it was made. * Because yeasts cannot digest t he starches in grains, t he grains to be used in mak ing beer and ale are allowed to germinate ( “malt” ). When it is t ime to make t he beer or ale, t he malted grain is soaked in water, forming a mash in which t he starches are split into simple sugars t hat can be digested (fermented) by t he yeasts. If undisturbed, t he fermentat ion will cont inue unt il all t he sugars have been digested, but it can be halted at any t ime simply by raising or lowering t he temperature of t he liquid. Beer sold in bott les or cans is pasteurized to k ill t he yeasts and stop t he fermentat ion. Draft beer is not pasteurized and must be refrigerated unt il tapped so t hat it will not cont inue to ferment in t he container. The longer t he shipping t ime, t he more likely it is t hat draft beer will be exposed to temperature variat ions t hat may affect its qualit y—which is why draft beer almost always tastes best when consumed near t he place where it was brewed. The Nutrients in Beer (12-ounce glass)

  Nutrients   Beer   %R DA
Calcium 17 mg 1.7
Magnesium 28.51 mg 7–9*
Phosphorus 41.1 mg 6
Potassium 85.7 mg (na)
Zinc 0.06 mg 0.5– 0.8*
Thiamin 0.02 mg 1.6 –1.8*
R iboflavin 0.09 mg 7– 8*
Niacin 1.55 mg 10
Vitamin B6 0.17 mg 13
Folate 20.57 mcg 5
  * t he first figure is t he %R DA for a man; t he second, for a woman Source: USDA Nut rient Database: w w w.nal.usda.gov/fnic/cgi-bin /nut _search.pl.

Diets That May Restrict or Exclude This Food Bland diet Gluten-free diet Low-purine (antigout) diet

Buying This Food Look for: A popular brand that sells steadily and will be fresh when you buy it. Avoid: Dusty or warm bottles and cans.

Storing This Food Store beer in a cool place. Beer tastes best when consumed within two months of the day it is made. Since you cannot be certain how long it took to ship the beer to the store or how long it has been sitting on the grocery shelves, buy only as much beer as you plan to use within a week or two. Protect bottled beer and open bottles or cans of beer from direct sunlight, which can change sulfur compounds in beer into isopentyl mercaptan, the smelly chemical that gives stale beer its characteristic unpleasant odor.

When You Are Ready to Serve This Food Serve beer only in absolutely clean glasses or mugs. Even the slightest bit of grease on the side of the glass will kill the foam immediately. Wash beer glasses with detergent, not soap, and let them drain dry rather than drying them with a towel that might carry grease from your hands to the glass. If you like a long-lasting head on your beer, serve the brew in tall, tapering glasses to let the foam spread out and stabilize. For full flavor, serve beer and ales cool but not ice-cold. Very low temperatures immo- bilize the molecules that give beer and ale their flavor and aroma.

What Happens When You Cook This Food When beer is heated (in a stew or as a basting liquid), the alcohol evaporates but the flavor- ing agents remain intact. Alcohol, an acid, reacts with metal ions from an aluminum or iron pot to form dark compounds that discolor the pot or the dish you are cooking in. To prevent this, prepare dishes made with beer in glass or enameled pots.

Medical Uses and/or Benefits Reduced risk of heart attack. Data from the American Cancer Society’s Cancer Prevention Study 1, a 12-year survey of more than 1 million Americans in 25 states, shows that men who take one drink a day have a 21 percent lower risk of heart attack and a 22 percent lower risk of stroke than men who do not drink at all. Women who have up to one drink a day also reduce their risk of heart attack. Numerous later studies have confirmed these findings. Lower risk of stroke. In January 1999, the results of a 677-person study published by researchers at New York Presbyterian Hospital-Columbia University showed that moder- ate alcohol consumption reduces the risk of stroke due to a blood clot in the brain among older people (average age: 70). How the alcohol prevents stroke is still unknown, but it is clear that moderate use of alcohol is a key. Heavy drinkers (those who consume more than seven drinks a day) have a higher risk of stroke. People who once drank heavily, but cut their consumption to moderate levels, can also reduce their risk of stroke. Numerous later studies have confirmed these findings. Lower cholesterol levels. Beverage alcohol decreases the body’s production and storage of low-density lipoproteins (LDLs), the protein and fat particles that carr y cholesterol into your arteries. As a result, people who drink moderately tend to have lower cholesterol levels and higher levels of high density lipoproteins (HDLs), the fat and protein particles that carr y cholesterol out of the body. The USDA /Health and Human Services Dietar y Guidelines for Americans defines moderation as two drinks a day for a man, one drink a day for a woman. Stimulating the appetite. Alcoholic beverages stimulate the production of saliva and the gastric acids that cause the stomach contractions we call hunger pangs. Moderate amounts of alcoholic beverages, which may help stimulate appetite, are often prescribed for geriatric patients, convalescents, and people who do not have ulcers or other chronic gastric problems that might be exacerbated by the alcohol. Dilation of blood vessels. Alcohol dilates the capillaries (the tiny blood vessels just under the skin), and moderate amounts of alcoholic beverages produce a pleasant flush that temporar- ily warms the drinker. But drinking is not an effective way to warm up in cold weather since the warm blood that flows up to the capillaries will cool down on the surface of your skin and make you even colder when it circulates back into the center of your body. Then an alco- hol flush will make you perspire, so that you lose more heat. Excessive amounts of beverage alcohol may depress the mechanism that regulates body temperature.

Adverse Effects Associated with This Food Increased risk of breast cancer. In 2008, scientists at the National Cancer Institute released data from a seven-year survey of more than 100,000 postmenopausal women showing that even moderate drinking (one to two drinks a day) may increase by 32 percent a woman’s risk of developing estrogen-receptor positive (ER+) and progesterone-receptor positive (PR+) breast cancer, tumors whose growth is stimulated by hormones. No such link was found between consuming alcohol and the risk of developing ER-/PR- tumors (not fueled by hor- mones). The finding applies to all types of alcohol: beer, wine, and spirits. Increased risk of oral cancer (cancer of the mouth and throat). Numerous studies confirm the American Cancer Society’s warning that men and women who consume more than two drinks a day are at higher risk of oral cancer than are nondrinkers or people who drink less. Note: The Dietary Guidelines for Americans describes one drink as 12 ounces of beer, five ounces of wine, or 1.5 ounces of distilled spirits. Increased risk of cancer of the colon and rectum. In the mid-1990s, studies at the University of Oklahoma suggested that men who drink more than five beers a day are at increased risk of rectal cancer. Later studies suggested that men and women who are heavy beer or spirits drinkers (but not those who are heavy wine drinkers) have a higher risk of colorectal cancers. Further studies are required to confirm these findings. Fetal alcohol syndrome. Fetal alcohol syndrome is a specific pattern of birth defects—low birth weight, heart defects, facial malformations, and mental retardation—first recognized in a study of babies born to alcoholic women who consumed more than six drinks a day while pregnant. Subsequent research has found a consistent pattern of milder defects in babies born to women who consume three to four drinks a day or five drinks on any one occasion while pregnant. To date, there is no evidence of a consistent pattern of birth defects in babies born to women who consume less than one drink a day while pregnant, but two studies at Columbia University have suggested that as few as two drinks a week while preg- nant may raise a woman’s risk of miscarriage. (“One drink” means 12 ounces of beer, five ounces of wine, or 1.25 ounces of distilled spirits.) Alcoholism. Alcoholism is an addiction disease, the inability to control one’s alcohol consumption. It is a potentially life-threatening condition, with a higher risk of death by accident, suicide, malnutrition, or acute alcohol poisoning, a toxic reaction that kills by para- lyzing body organs, including the heart. Malnutrition. While moderate alcohol consumption stimulates appetite, alcohol abuse depresses it. In addition, an alcoholic may drink instead of eating. When an alcoholic does eat, excess alcohol in his/her body prevents absorption of nutrients and reduces the ability to synthesize new tissue. Hangover. Alcohol is absorbed from the stomach and small intestine and carried by the bloodstream to the liver, where it is oxidized to acetaldehyde by alcohol dehydrogenase (ADH), the enzyme our bodies use to metabolize the alcohol we produce when we digest carbohydrates. The acetaldehyde is converted to acetyl coenzyme A and either eliminated from the body or used in the synthesis of cholesterol, fatty acids, and body tissues. Although individuals vary widely in their capacity to metabolize alcohol, on average, normal healthy adults can metabolize the alcohol in one quart of beer in approximately five to six hours. If they drink more than that, they will have more alcohol than the body’s natural supply of ADH can handle. The unmetabolized alcohol will pile up in the bloodstream, interfering with the liver’s metabolic functions. Since alcohol decreases the reabsorption of water from the kidneys and may inhibit the secretion of an antidiuretic hormone, they will begin to urinate copiously, losing magnesium, calcium, and zinc but retaining more irritating uric acid. The level of lactic acid in the body will increase, making them feel tired and out of sorts; their acid-base balance will be out of kilter; the blood vessels in their heads will swell and throb; and their stomachs, with linings irritated by the alcohol, will ache. The ultimate result is a “hangover” whose symptoms will disappear only when enough time has passed to allow their bodies to marshal the ADH needed to metabolize the extra alcohol in their blood. Changes in body temperature. Alcohol dilates capillaries, tiny blood vessels just under the skin, producing a “flush” that temporarily warms the drinker. But drinking is not an effective way to stay warm in cold weather. Warm blood flowing up from the body core to the surface capillaries is quickly chilled, making you even colder when it circulates back into your organs. In addition, an alcohol flush triggers perspiration, further cooling your skin. Finally, very large amounts of alcohol may actually depress the mechanism that regulates body temperature. Impotence. Excessive drinking decreases libido (sexual desire) and interferes with the ability to achieve or sustain an erection. “Beer belly.” Data from a 1995, 12,000 person study at the University of North Carolina in Chapel Hill show that people who consume at least six beers a week have more rounded abdomens than people who do not drink beer. The question left to be answered is which came first: the tummy or the drinking.

Food/Drug Interactions Acetaminophen (Tylenol, etc.). The FDA recommends that people who regularly have three or more drinks a day consult a doctor before using acetaminophen. The alcohol/acetamino- phen combination may cause liver failure. Disulfiram (Antabuse). Taken with alcohol, disulfiram causes flushing, nausea, low blood pressure, faintness, respiratory problems, and confusion. The severity of the reaction gener- ally depends on how much alcohol you drink, how much disulfiram is in your body, and how long ago you took it. Disulfiram is used to help recovering alcoholics avoid alcohol. (If taken with alcohol, metronidazole [Flagyl], procarbazine [Matulane], quinacrine [Atabrine], chlorpropamide (Diabinase), and some species of mushrooms may produce a mild disulfi- ramlike reaction.) Anticoagulants. Alcohol slows the body’s metabolism of anticoagulants (blood thinners) such as warfarin (Coumadin), intensif ying the effect of the drugs and increasing the risk of side effects such as spontaneous nosebleeds. Antidepressants. Alcohol may increase the sedative effects of antidepressants. Drinking alcohol while you are taking a monoamine oxidase (M AO) inhibitor is especially hazard- ous. M AO inhibitors inactivate naturally occurring enzymes in your body that metabolize tyramine, a substance found in many fermented or aged foods. Tyramine constricts blood vessels and increases blood pressure. If you eat a food containing tyramine while you are taking an M AO inhibitor, you cannot effectively eliminate the tyramine from your body. The result may be a hypertensive crisis. Ordinarily, fermentation of beer and ale does not produce tyramine, but some patients have reported tyramine reactions after drinking some imported beers. Beer and ale are usually prohibited to those using M AO inhibitors. Aspirin, ibuprofen, ketoprofen, naproxen, and nonsteroidal anti-inflammatory drugs. Like alcohol, these analgesics irritate the lining of the stomach and may cause gastric bleeding. Combining the two intensifies the effect. Insulin and oral hypoglycemics. Alcohol lowers blood sugar and interferes with the metabo- lism of oral antidiabetics; the combination may cause severe hypoglycemia. Sedatives and other central nervous system depressants (tranquilizers, sleeping pills, antidepres- sants, sinus and cold remedies, analgesics, and medication for motion sickness). Alcohol inten- sifies sedation and, depending on the dose, may cause drowsiness, respiratory depression, coma, or death.... beer

Distilled Spirits

(Brandy, gin, rum, tequila, whiskey, vodka)

Nutritional Profile Energy value (calories per serving): Moderate to high Protein: None Fat: None Saturated fat: None Cholesterol: None Carbohydrates: None (except for cordials which contain added sugar) Fiber: None Sodium: Low Major vitamin contribution: None Major mineral contribution: Phosphorus

About the Nutrients in This Food Spirits are the clear liquids produced by distilling the fermented sugars of grains, fruit, or vegetables. The yeasts that metabolize these sugars and convert them into alcohol stop growing when the concentration of alcohol rises above 12–15 percent. In the United States, the proof of an alcoholic beverage is defined as twice its alcohol content by volume: a beverage with 20 percent alcohol by volume is 40 proof. This is high enough for most wines, but not high enough for most whiskies, gins, vodkas, rums, brandies, and tequilas. To reach the concentra- tion of alcohol required in these beverages, the fermented sugars are heated and distilled. Ethyl alcohol (the alcohol in beer, wine, and spirits) boils at a lower temperature than water. When the fermented sugars are heated, the ethyl alcohol escapes from the distillation vat and condenses in tubes leading from the vat to a collection vessel. The clear liquid that collects in this vessel is called distilled spirits or, more technically, grain neutral spirits. Gins, whiskies, cordials, and many vodkas are made with spirits American whiskeys (which include bourbon, rye, and distilled from grains. blended whiskeys) and Canadian, Irish, and Scotch whiskies are all made from spirits aged in wood barrels. They get their flavor from the grains and their color from the barrels. (Some whiskies are also colored with caramel.) Vodka is made from spirits distilled and filtered to remove all flavor. By law, vodkas made in America must be made with spirits distilled from grains. Imported vodkas may be made with spirits distilled either from grains or potatoes and may contain additional flavoring agents such as citric acid or pepper. Aquavit, for example, is essentially vodka flavored with caraway seeds. Gin is a clear spirit flavored with an infusion of juniper berries and other herbs (botanicals). Cordials (also called liqueurs) and schnapps are flavored spirits; most are sweetened with added sugar. Some cordials contain cream. Rum is made with spirits distilled from sugar cane (molasses). Tequila is made with spirits distilled from the blue agave plant. Brandies are made with spirits distilled from fruit. (Arma- gnac and cognac are distilled from fermented grapes, calvados and applejack from fermented apples, kirsch from fermented cherries, slivovitz from fermented plums.) Unless they contain added sugar or cream, spirits have no nutrients other than alcohol. Unlike food, which has to be metabolized before your body can use it for energy, alcohol can be absorbed into the blood-stream directly from the gastrointestinal tract. Ethyl alcohol provides 7 calories per gram.

The Most Nutritious Way to Serve This Food The USDA /Health and Human Services Dietary Guidelines for Americans defines one drink as 12 ounces of beer, five ounces of wine, or 1.25 ounces of distilled spirits, and “moderate drinking” as two drinks a day for a man, one drink a day for a woman.

Diets That May Restrict or Exclude This Food Bland diet Lactose-free diet (cream cordials made with cream or milk) Low-purine (antigout) diet

Buying This Food Look for: Tightly sealed bottles stored out of direct sunlight, whose energy might disrupt the structure of molecules in the beverage and alter its flavor. Choose spirits sold only by licensed dealers. Products sold in these stores are manufac- tured under the strict supervision of the federal government.

Storing This Food Store sealed or opened bottles of spirits in a cool, dark cabinet.

Preparing This Food All spirits except unflavored vodkas contain volatile molecules that give the beverage its characteristic taste and smell. Warming the liquid excites these molecules and intensifies the flavor and aroma, which is the reason we serve brandy in a round glass with a narrower top that captures the aromatic molecules as they rise toward the air when we warm the glass by holding it in our hands. Whiskies, too, though traditionally served with ice in America, will have a more intense flavor and aroma if served at room temperature.

What Happens When You Cook This Food The heat of cooking evaporates the alcohol in spirits but leaves the flavoring intact. Like other alcoholic beverages, spirits should be added to a recipe near the end of the cooking time to preserve the flavor while cooking away any alcohol bite. Alcohol is an acid. If you cook it in an aluminum or iron pot, it will combine with metal ions to form dark compounds that discolor the pot and the food you are cooking. Any recipe made with spirits should be prepared in an enameled, glass, or stainless-steel pot.

Medical Uses and/or Benefits Reduced risk of heart attack. Data from the American Cancer Society’s Cancer Prevention Study 1, a 12-year survey of more than 1 million Americans in 25 states, shows that men who take one drink a day have a 21 percent lower risk of heart attack and a 22 percent lower risk of stroke than men who do not drink at all. Women who have up to one drink a day also reduce their risk of heart attack. Numerous later studies have confirmed these findings. Lower cholesterol levels. Beverage alcohol decreases the body’s production and storage of low density lipoproteins (LDLs), the protein and fat particles that carry cholesterol into your arteries. As a result, people who drink moderately tend to have lower cholesterol levels and higher levels of high density lipoproteins (HDLs), the fat and protein particles that carry cholesterol out of the body. Numerous later studies have confirmed these findings. Lower risk of stroke. In January 1999, the results of a 677-person study published by researchers at New York Presbyterian Hospital-Columbia University showed that moderate alcohol consumption reduces the risk of stroke due to a blood clot in the brain among older people (average age: 70). How alcohol prevents stroke is still unknown, but it is clear that moderate use is a key. Heavy drinkers (those who consume more than seven drinks a day) have a higher risk of stroke. People who once drank heavily, but cut their consumption to moderate levels, reduce their risk of stroke. Stimulating the appetite. Alcoholic beverages stimulate the production of saliva and the gastric acids that cause the stomach contractions we call hunger pangs. Moderate amounts of alcoholic beverages, which may help stimulate appetite, are often prescribed for geriatric patients, convalescents, and people who do not have ulcers or other chronic gastric problems that might be exacerbated by the alcohol. Dilation of blood vessels. Alcoholic beverages dilate the tiny blood vessels just under the skin, bringing blood up to the surface. That’s why moderate amounts of alcoholic beverages (0.2–1 gram per kilogram of body weight, or two ounces of whiskey for a 150-pound adult) temporarily warm the drinker. But the warm blood that flows up to the surface of the skin will cool down there, making you even colder when it circulates back into the center of your body. Then an alcohol flush will make you perspire, so you lose more heat. Excessive amounts of beverage alcohol may depress the mechanism that regulates body temperature.

Adverse Effects Associated with This Food Alcoholism. Alcoholism is an addiction disease, the inability to control one’s alcohol consumption. It is a potentially life-threatening condition, with a higher risk of death by accident, suicide, malnutrition, or acute alcohol poisoning, a toxic reaction that kills by para- lyzing body organs, including the heart. Fetal alcohol syndrome. Fetal alcohol syndrome is a specific pattern of birth defects—low birth weight, heart defects, facial malformations, learning disabilities, and mental retarda- tion—first recognized in a study of babies born to alcoholic women who consumed more than six drinks a day while pregnant. Subsequent research has found a consistent pattern of milder defects in babies born to women who drink three to four drinks a day or five drinks on any one occasion while pregnant. To date there is no evidence of a consistent pattern of birth defects in babies born to women who consume less than one drink a day while preg- nant, but two studies at Columbia University have suggested that as few as two drinks a week while pregnant may raise a woman’s risk of miscarriage. (One drink is 12 ounces of beer, five ounces of wine, or 1.25 ounces of distilled spirits.) Increased risk of breast cancer. In 2008, scientists at the National Cancer Institute released data from a seven-year survey of more than 100,000 postmenopausal women showing that even moderate drinking (one to two drinks a day) may increase by 32 percent a woman’s risk of developing estrogen-receptor positive (ER+) and progesterone-receptor positive (PR+) breast cancer, tumors whose growth is stimulated by hormones. No such link was found between consuming alcohol and the risk of developing ER-/PR- tumors (not fueled by hor- mones). The finding applies to all types of alcohol: beer, wine, and distilled spirits. Increased risk of oral cancer (cancer of the mouth and throat). Numerous studies confirm the A merican Cancer Societ y’s warn ing that men and women who consume more than t wo drinks a day are at higher risk of oral cancer than are nondrinkers or people who drink less. Increased risk of cancer of the colon and rectum. In the mid-1990s, studies at the University of Oklahoma suggested that men who drink more than five beers a day are at increased risk of rectal cancer. Later studies suggested that men and women who are heavy beer or spirits drinkers (but not those who are heavy wine drinkers) have a higher risk of colorectal cancers. Further studies are required to confirm these findings. Malnutrition. While moderate alcohol consumption stimulates appetite, alcohol abuses depresses it. In addition, an alcoholic may drink instead of eating. When an alcoholic does eat, excess alcohol in his/her body prevents absorption of nutrients and reduces the ability to synthesize new tissue. Hangover. Alcohol is absorbed from the stomach and small intestine and carried by the bloodstream to the liver, where it is oxidized to acetaldehyde by alcohol dehydrogenase (ADH), the enzyme our bodies use every day to metabolize the alcohol we produce when we digest carbohydrates. The acetaldehyde is converted to acetyl coenzyme A and either eliminated from the body or used in the synthesis of cholesterol, fatty acids, and body tis- sues. Although individuals vary widely in their capacity to metabolize alcohol, an adult of average size can metabolize the alcohol in four ounces (120 ml) whiskey in approximately five to six hours. If he or she drinks more than that, the amount of alcohol in the body will exceed the available supply of ADH. The surplus, unmetabolized alcohol will pile up in the bloodstream, interfering with the liver’s metabolic functions. Since alcohol decreases the reabsorption of water from the kidneys and may inhibit the secretion of an antidiuretic hormone, the drinker will begin to urinate copiously, losing magnesium, calcium, and zinc but retaining uric acid, which is irritating. The level of lactic acid in the body will increase, making him or her feel tired and out of sorts; the acid-base balance will be out of kilter; the blood vessels in the head will swell and throb; and the stomach, its lining irritated by the alcohol, will ache. The ultimate result is a hangover whose symptoms will disappear only when enough time has passed to allow the body to marshal the ADH needed to metabolize the extra alcohol in the person’s blood. Changes in body temperature. Alcohol dilates capillaries, tiny blood vessels just under the skin, producing a “flush” that temporarily warms the drinker. But drinking is not an effective way to stay warm in cold weather. Warm blood flowing up from the body core to the surface capillaries is quickly chilled, making you even colder when it circulates back into your organs. In addition, an alcohol flush triggers perspiration, further cooling your skin. Finally, very large amounts of alcohol may actually depress the mechanism that regulates body temperature. Impotence. Excessive drinking decreases libido (sexual desire) and interferes with the ability to achieve or sustain an erection. Migraine headache. Some alcoholic beverages contain chemicals that inhibit PST, an enzyme that breaks down certain alcohols in spirits so that they can be eliminated from the body. If they are not broken down by PST, these alcohols will build up in the bloodstream and may trigger a migraine headache. Gin and vodka appear to be the distilled spirits least likely to trigger headaches, brandy the most likely.

Food/Drug Interactions Acetaminophen (Tylenol, etc.). FDA recommends that people who regularly have three or more drinks a day consult a doctor before using acetaminophen. The alcohol/acetaminophen combination may cause liver failure. Anti-alcohol abuse drugs (disulfiram [Antabuse]). Taken concurrently with alcohol, the anti- alcoholism drug disulfiram can cause flushing, nausea, a drop in blood pressure, breathing difficulty, and confusion. The severity of the symptoms, which may var y among individu- als, generally depends on the amount of alcohol consumed and the amount of disulfiram in the body. Anticoagulants. Alcohol slows the body’s metabolism of anticoagulants (blood thinners), intensif ying the effect of the drugs and increasing the risk of side effects such as spontane- ous nosebleeds. Antidepressants. Alcohol may strengthen the sedative effects of antidepressants. Aspirin, ibuprofen, ketoprofen, naproxen and nonsteroidal anti-inflammatory drugs. Like alco- hol, these analgesics irritate the lining of the stomach and may cause gastric bleeding. Com- bining the two intensifies the effect. Insulin and oral hypoglycemics. Alcohol lowers blood sugar and interferes with the metabo- lism of oral antidiabetics; the combination may cause severe hypoglycemia. Sedatives and other central nervous system depressants (tranquilizers, sleeping pills, antide- pressants, sinus and cold remedies, analgesics, and medication for motion sickness). Alcohol intensifies the sedative effects of these medications and, depending on the dose, may cause drowsiness, sedation, respiratory depression, coma, or death. MAO inhibitors. Monoamine oxidase (M AO) inhibitors are drugs used as antidepressants or antihypertensives. They inhibit the action of natural enzymes that break down tyramine, a substance formed naturally when proteins are metabolized. Tyramine is a pressor amine, a chemical that constricts blood vessel and raises blood pressure. If you eat a food that contains tyramine while you are taking an M AO inhibitor, the pressor amine cannot be eliminated from your body and the result may be a hypertensive crisis (sustained elevated blood pressure). Brandy, a distilled spirit made from wine (which is fermented) contains tyramine. All other distilled spirits may be excluded from your diet when you are taking an M AO inhibitor because the spirits and the drug, which are both sedatives, may be hazard- ous in combination.... distilled spirits

Ferula Jaeschkeana

Vatke.

Family: Umbelliferae; Apiaceae.

Habitat: Jammu and Kashmir and Himachal Pradesh from 2,000 to 4,000 m.

Ayurvedic: Hingupatri.

Action: Abortifacient, antiimplantation. Being investigated as a potential contraceptive. A related species, F. silphion, was used in ancient Rome as a contraceptive.

The oil extracted from the leaves possesses mycotoxic property against dermatophytes, Trichophyton sp.

The ethanolic extract of the aerial parts produced dilation and congestion and hypertrophy in liver in rats.

The roots contain sesquiterpenoids. A coumarin, ferujol, isolated from the rhizome, showed abortifacient and anti-implantation activity at a single dose of 0.6 mg/kg in rats by oral administration in a suspension of gum acacia. The essential oil shows antimy- cotic activity.

Action: Resin—less strong than asafoetida; used in the same way as asafoetida and galbanum. Used in Middle East for rheumatic affections and backache.... ferula jaeschkeana

Pregnancy And Labour

Pregnancy The time when a woman carries a developing baby in her UTERUS. For the ?rst 12 weeks (the ?rst trimester) the baby is known as an EMBRYO, after which it is referred to as the FETUS.

Pregnancy lasts about 280 days and is calculated from the ?rst day of the last menstrual period – see MENSTRUATION. Pregnancy-testing kits rely on the presence of the hormone beta HUMAN CHORIONIC GONADOTROPHIN (b HCG) which is excreted in the woman’s urine as early as 30 days from the last menstrual period. The estimated date of delivery can be accurately estimated from the size of the developing fetus measured by ULTRASOUND (see also below) between seven and 24 weeks. ‘Term’ refers to the time that the baby is due; this can range from 38 weeks to 41 completed weeks.

Physical changes occur in early pregnancy – periods stop and the abdomen enlarges. The breasts swell, with the veins becoming prominent and the nipples darkening. About two in three women will have nausea with a few experiencing such severe vomiting as to require hospital admission for rehydration.

Antenatal care The aim of antenatal care is to ensure a safe outcome for both mother and child; it is provided by midwives (see MIDWIFE) and doctors. Formal antenatal care began in Edinburgh in the 1930s with the recognition that all aspects of pregnancy – normal and abnormal – warranted surveillance. Cooperation between general practitioners, midwives and obstetricians is now established, with pregnancies that are likely to progress normally being cared for in the community and only those needing special intervention being cared for in a hospital setting.

The initial visit (or booking) in the ?rst half of pregnancy will record the history of past events and the results of tests, with the aim of categorising the patients into normal or not. Screening tests including blood checks and ultrasound scans are a routine part of antenatal care. The ?rst ultrasound scan is done at about 11 weeks to date the pregnancy, with a further one done at 20 weeks – the anomaly scan – to assess the baby’s structure. Some obstetric units will check the growth of the baby with one further scan later in the pregnancy or, in the case of twin pregnancies (see below), many scans throughout. The routine blood tests include checks for ANAEMIA, DIABETES MELLITUS, sickle-cell disease and THALASSAEMIA, as well as for the blood group. Evidence of past infections is also looked for; tests for RUBELLA (German measles) and SYPHILIS are routine, whereas tests for human immunode?ciency virus (see AIDS/ HIV below) and HEPATITIS are being o?ered as optional, although there is compelling evidence that knowledge of the mother’s infection status is bene?cial to the baby.

Traditional antenatal care consists of regular appointments, initially every four weeks until 34 weeks, then fortnightly or weekly. At each visit the mother’s weight, urine and blood pressure are checked, and assessment of fetal growth and position is done by palpating the uterus. Around two-thirds of pregnancies and labours are normal: in the remainder, doctors and midwives need to increase the frequency of surveillance so as to prevent or deal with maternal and fetal problems.

Common complications of pregnancy

Some of the more common complications of pregnancy are listed below.

As well as early detection of medical complications, antenatal visits aim to be supportive and include emotional and educational care. Women with uncomplicated pregnancies are increasingly being managed by midwives and general practitioners in the community and only coming to the hospital doctors should they develop a problem. A small number will opt for a home delivery, but facilities for providing such a service are not always available in the UK.

Women requiring more intensive surveillance have their management targeted to the speci?c problems encountered. Cardiologists will see mothers-to-be with heart conditions, and those at risk of diabetes are cared for in designated clinics with specialist sta?. Those women needing more frequent surveillance than standard antenatal care can be looked after in maternity day centres. These typically include women with mildly raised blood pressure or those with small babies. Fetal medicine units have specialists who are highly skilled in ultrasound scanning and specialise in the diagnosis and management of abnormal babies still in the uterus. ECTOPIC PREGNANCY Chronic abdominal discomfort early in pregnancy may be caused by unruptured ectopic pregnancy, when, rarely, the fertilised OVUM starts developing in the Fallopian tube (see FALLOPIAN TUBES) instead of the uterus. The patient needs hospital treatment and LAPAROSCOPY. A ruptured ectopic pregnancy causes acute abdominal symptoms and collapse, and the woman will require urgent abdominal surgery. URINARY TRACT INFECTIONS These affect around 2 per cent of pregnant women and are detected by a laboratory test of a mid-stream specimen of urine. In pregnancy, symptoms of these infections do not necessarily resemble those experienced by non-pregnant women. As they can cause uterine irritability and possible premature labour (see below), it is important to ?nd and treat them appropriately. ANAEMIA is more prevalent in patients who are vegetarian or on a poor diet. Iron supplements are usually given to women who have low concentrations of HAEMOGLOBIN in their blood (less than 10.5 g/dl) or who are at risk of becoming low in iron, from bleeding, twin pregnancies and those with placenta previa (see below). ANTEPARTUM HAEMORRHAGE Early in pregnancy, vaginal bleedings may be due to a spontaneous or an incomplete therapeutic ABORTION. Bleeding from the genital tract between 24 completed weeks of pregnancy and the start of labour is called antepartum haemorrhage. The most common site is where the PLACENTA is attached to the wall of the uterus. If the placenta separates before delivery, bleeding occurs in the exposed ‘bed’. When the placenta is positioned in the upper part of the uterus it is called an abruption. PLACENTA PRAEVIA is sited in the lower part and blocks or partly blocks the cervix (neck of the womb); it can be identi?ed at about the 34th week. Ten per cent of episodes of antepartum bleeding are caused by placenta previa, and it may be associated with bleeding at delivery. This potentially serious complication is diagnosed by ultrasound scanning and may require a caesarean section (see below) at delivery. INCREASED BLOOD PRESSURE, associated with protein in the urine and swelling of the limbs, is part of a condition known as PRE-ECLAMPSIA. This occurs in the second half of pregnancy in about 1 in 10 women expecting their ?rst baby, and is mostly very mild and of no consequence to the pregnancy. However, some women can develop extremely high blood pressures which can adversely affect the fetus and cause epileptic-type seizures and bleeding disorders in the mother. This serious condition is called ECLAMPSIA. For this reason a pregnant woman with raised blood pressure or PROTEIN in her urine is carefully evaluated with blood tests, often in the maternity day assessment unit. The condition can be stopped by delivery of the baby, and this will be done if the mother’s or the fetus’s life is in danger. If the condition is milder, and the baby not mature enough for a safe delivery, then drugs can be used to control the blood pressure. MISCARRIAGE Also called spontaneous abortion, miscarriage is the loss of the fetus. There are several types:

threatened miscarriage is one in which some vaginal bleeding occurs, the uterus is enlarged, but the cervix remains closed and pregnancy usually proceeds.

inevitable miscarriage usually occurs before the 16th week and is typi?ed by extensive blood loss through an opened cervix and cramp-like abdominal pain; some products of conception are lost but the developing placental area (decidua) is retained and an operation may be necessary to clear the womb.

missed miscarriages, in which the embryo dies and is absorbed, but the decidua (placental area of uterine wall) remains and may cause abdominal discomfort and discharge of old blood.

THERAPEUTIC ABORTION is performed on more than 170,000 women annually in England and Wales. Sometimes the woman may not have arranged the procedure through the usual health-care channels, so that a doctor may see a patient with vaginal bleeding, abdominal discomfort or pain, and open cervix – symptoms which suggest that the decidua and a blood clot have been retained; these retained products will need to be removed by curettage.

Septic abortions are now much less common in Britain than before the Abortion Act (1967) permitted abortion in speci?ed circumstances. The cause is the passage of infective organisms from the vagina into the uterus, with Escherichia coli and Streptococcus faecalis the most common pathogenic agents. The woman has abdominal pain, heavy bleeding, usually fever and sometimes she is in shock. The cause is usually an incomplete abortion or one induced in unsterile circumstances. Antibiotics and curettage are the treatment. INTRAUTERINE GROWTH RETARDATION describes a slowing of the baby’s growth. This can be diagnosed by ultrasound scanning, although there is a considerable margin of error in estimates of fetal weight. Trends in growth are favoured over one-o? scan results alone. GESTATIONAL DIABETES is a condition that is more common in women who are overweight or have a family member with diabetes. If high concentrations of blood sugar are found, e?orts are made to correct it as the babies can become very fat (macrosomia), making delivery more di?cult. A low-sugar diet is usually enough to control the blood concentration of sugars; however some women need small doses of INSULIN to achieve control. FETAL ABNORMALITIES can be detected before birth using ultrasound. Some of these defects are obvious, such as the absence of kidneys, a condition incompatible with life outside the womb. These women can be o?ered a termination of their pregnancy. However, more commonly, the pattern of problems can only hint at an abnormality and closer examination is needed, particularly in the diagnosis of chromosomal deformities such as DOWN’S (DOWN) SYNDROME (trisomy 21 or presence of three 21 chromosomes instead of two).

Chromosomal abnormalities can be de?nitively diagnosed only by cell sampling such as amniocentesis (obtaining amniotic ?uid – see AMNION – from around the baby) done at 15 weeks onwards, and chorionic villus sampling (sampling a small part of the placenta) – another technique which can be done from 12 weeks onwards. Both have a small risk of miscarriage associated with them; consequently, they are con?ned to women at higher risk of having an abnormal fetus.

Biochemical markers present in the pregnant woman’s blood at di?erent stages of pregnancy may have undergone changes in those carrying an abnormal fetus. The ?rst such marker to be routinely used was a high concentration of alpha-fetol protein in babies with SPINA BIFIDA (defects in the covering of the spinal cord). Fuller research has identi?ed a range of diagnostic markers which are useful, and, in conjunction with other factors such as age, ethnic group and ultrasound ?ndings, can provide a predictive guide to the obstetrician – in consultation with the woman – as to whether or not to proceed to an invasive test. These tests include pregnancy-associated plasma protein assessed from a blood sample taken at 12 weeks and four blood tests at 15–22 weeks – alphafetol protein, beta human chorionic gonadotrophin, unconjugated oestriol and inhibin A. Ultrasound itself can reveal physical ?ndings in the fetus, which can be more common in certain abnormalities. Swelling in the neck region of an embryo in early pregnancy (increased nuchal thickness) has good predictive value on its own, although its accuracy is improved in combination with the biochemical markers. The e?ectiveness of prenatal diagnosis is rapidly evolving, the aim being to make the diagnosis as early in the pregnancy as possible to help the parents make more informed choices. MULTIPLE PREGNANCIES In the UK, one in 95 deliveries is of twins, while the prevalence of triplets is one in 10,000 and quadruplets around one in 500,000. Racial variations occur, with African women having a prevalence rate of one in 30 deliveries for twins and Japanese women a much lower rate than the UK ?gure. Multiple pregnancies occur more often in older women, and in the UK the prevalence of fertility treatments, many of these being given to older women, has raised the incidence. There is now an o?cial limit of three eggs being transferred to a woman undergoing ASSISTED CONCEPTION (gamete intrafallopian transfer, or GIFT).

Multiple pregnancies are now usually diagnosed as a result of routine ultrasound scans between 16 and 20 weeks of pregnancy. The increased size of the uterus results in the mother having more or worse pregnancy-related conditions such as nausea, abdominal discomfort, backache and varicose veins. Some congenital abnormalities in the fetus occur more frequently in twins: NEURAL TUBE defects, abnormalities of the heart and the incidence of TURNER’S SYNDROME and KLINEFELTER’S SYNDROME are examples. Such abnormalities may be detected by ultrasound scans or amniocentesis. High maternal blood pressure and anaemia are commoner in women with multiple pregnancies (see above).

The growth rates of multiple fetuses vary, but the di?erence between them and single fetuses are not that great until the later stages of pregnancy. Preterm labour is commoner in multiple pregnancies: the median length of pregnancy is 40 weeks for singletons, 37 for twins and 33 for triplets. Low birth-weights are usually the result of early delivery rather than abnormalities in growth rates. Women with multiple pregnancies require more frequent and vigilant antenatal assessments, with their carers being alert to the signs of preterm labour occurring. CEPHALOPELVIC DISPROPORTION Disparity between the size of the fetus and the mother’s pelvis is not common in the UK but is a signi?cant problem in the developing world. Disparity is classi?ed as absolute, when there is no possibility of delivery, and relative, when the baby is large but delivery (usually after a dif?cult labour) is possible. Causes of absolute disparity include: a large baby – heavier than 5 kg at birth; fetal HYDROCEPHALUS; and an abnormal maternal pelvis. The latter may be congenital, the result of trauma or a contraction in pelvic size because of OSTEOMALACIA early in life. Disproportion should be suspected if in late pregnancy the fetal head has not ‘engaged’ in the pelvis. Sometimes a closely supervised ‘trial of labour’ may result in a successful, if prolonged, delivery. Otherwise a caesarean section (see below) is necessary. UNUSUAL POSITIONS AND PRESENTATIONS OF THE BABY In most pregnant women the baby ?ts into the maternal pelvis head-?rst in what is called the occipito-anterior position, with the baby’s face pointing towards the back of the pelvis. Sometimes, however, the head may face the other way, or enter the pelvis transversely – or, rarely, the baby’s neck is ?exed backwards with the brow or face presenting to the neck of the womb. Some malpositions will correct naturally; others can be manipulated abdominally during pregnancy to a better position. If, however, the mother starts labour with the baby’s head badly positioned or with the buttocks instead of the head presenting (breech position), the labour will usually be longer and more di?cult and may require intervention using special obstetric forceps to assist in extracting the baby. If progress is poor and the fetus distressed, caesarean section may be necessary. HIV INFECTION Pregnant women who are HIV positive (see HIV; AIDS/HIV) should be taking antiviral drugs in the ?nal four to ?ve months of pregnancy, so as to reduce the risk of infecting the baby in utero and during birth by around 50 per cent. Additional antiviral treatment is given before delivery; the infection risk to the baby can be further reduced – by about 40 per cent – if delivery is by caesarean section. The mother may prefer to have the baby normally, in which case great care should be taken not to damage the baby’s skin during delivery. The infection risk to the baby is even further reduced if it is not breast fed. If all preventive precautions are taken, the overall risk of the infant becoming infected is cut to under 5 per cent.

Premature birth This is a birth that takes place before the end of the normal period of gestation, usually before 37 weeks. In practice, however, it is de?ned as a birth that takes place when the baby weighs less than 2·5 kilograms (5••• pounds). Between 5 and 10 per cent of babies are born prematurely, and in around 40 per cent of premature births the cause is unknown. Pre-eclampsia is the most common known cause; others include hypertension, chronic kidney disease, heart disease and diabetes mellitus. Multiple pregnancy is another cause. In the vast majority of cases the aim of management is to prolong the pregnancy and so improve the outlook for the unborn child. This consists essentially of rest in bed and sedation, but there are now several drugs, such as RITODRINE, that may be used to suppress the activity of the uterus and so help to delay premature labour. Prematurity was once a prime cause of infant mortality but modern medical care has greatly improved survival rates in developing countries.

Labour Also known by the traditional terms parturition, childbirth or delivery, this is the process by which the baby and subsequently the placenta are expelled from the mother’s body. The onset of labour is often preceded by a ‘show’ – the loss of the mucus and blood plug from the cervix, or neck of the womb; this passes down the vagina to the exterior. The time before the beginning of labour is called the ‘latent phase’ and characteristically lasts 24 hours or more in a ?rst pregnancy. Labour itself is de?ned by regular, painful contractions which cause dilation of the neck of the womb and descent of the fetal head. ‘Breaking of the waters’ is the loss of amniotic ?uid vaginally and can occur any time in the delivery process.

Labour itself is divided into three stages: the ?rst is from the onset of labour to full (10 cm) dilation of the neck of the womb. This stage varies in length, ideally taking no more than one hour per centimetre of dilation. Progress is monitored by regular vaginal examinations, usually every four hours. Fetal well-being is observed by intermittent or continuous monitoring of the fetal heart rate in relation to the timing and frequency of the contractions. The print-out is called a cardiotocograph. Abnormalities of the fetal heart rate may suggest fetal distress and may warrant intervention. In women having their ?rst baby (primigravidae), the common cause of a slow labour is uncoordinated contractions which can be overcome by giving either of the drugs PROSTAGLANDIN or OXYTOCIN, which provoke contractions of the uterine muscle, by an intravenous drip. Labours which progress slowly or not at all may be due to abnormal positioning of the fetus or too large a fetus, when prostaglandin or oxytocin is used much more cautiously.

The second stage of labour is from full cervical dilation to the delivery of the baby. At this stage the mother often experiences an irresistible urge to push the baby out, and a combination of strong coordinated uterine contractions and maternal e?ort gradually moves the baby down the birth canal. This stage usually lasts under an hour but can take longer. Delay, exhaustion of the mother or distress of the fetus may necessitate intervention by the midwife or doctor. This may mean enlarging the vaginal opening with an EPISIOTOMY (cutting of the perineal outlet – see below) or assisting the delivery with specially designed obstetric forceps or a vacuum extractor (ventouse). If the cervix is not completely dilated or open and the head not descended, then an emergency caesarean section may need to be done to deliver the baby. This procedure involves delivering the baby and placenta through an incision in the mother’s abdomen. It is sometimes necessary to deliver by planned or elective caesarean section: for example, if the placenta is low in the uterus – called placenta praevia – making a vaginal delivery dangerous.

The third stage occurs when the placenta (or afterbirth) is delivered, which is usually about 10–20 minutes after the baby. An injection of ergometrine and oxytocin is often given to women to prevent bleeding.

Pain relief in labour varies according to the mother’s needs. For uncomplicated labours, massage, reassurance by a birth attendant, and a warm bath and mobilisation may be enough for some women. However, some labours are painful, particularly if the woman is tired or anxious or is having her ?rst baby. In these cases other forms of analgesia are available, ranging from inhalation of NITROUS OXIDE GAS, injection of PETHIDINE HYDROCHLORIDE or similar narcotic, and regional local anaesthetic (see ANAESTHESIA).

Once a woman has delivered, care continues to ensure her and the baby’s safety. The midwives are involved in checking that the uterus returns to its normal size and that there is no infection or heavy bleeding, as well as caring for stitches if needed. The normal blood loss after birth is called lochia and generally is light, lasting up to six weeks. Midwives o?er support with breast feeding and care of the infant and will visit the parents at home routinely for up to two weeks.

Some complications of labour All operative deliveries in the UK are now done in hospitals, and are performed if a spontaneous birth is expected to pose a bigger risk to the mother or her child than a specialist-assisted one. Operative deliveries include caesarean section, forceps-assisted deliveries and those in which vacuum extraction (ventouse) is used. CAESAREAN SECTION Absolute indications for this procedure, which is used to deliver over 15 per cent of babies in Britain, are cephalopelvic disproportion and extensive placenta praevia, both discussed above. Otherwise the decision to undertake caesarean section depends on the clinical judgement of the specialist and the views of the mother. The rise in the proportion of this type of intervention (from 5 per cent in the 1930s to its present level of over 23 per cent

P

of the 600,000 or so annual deliveries in England) has been put down to defensive medicine

– namely, the doctor’s fear of litigation (initiated often because the parents believe that the baby’s health has suffered because the mother had an avoidably di?cult ‘natural’ labour). In Britain, over 60 per cent of women who have had a caesarean section try a vaginal delivery in a succeeding pregnancy, with about two-thirds of these being successful. Indications for the operation include:

absolute and relative cephalopelvic disproportion.

placenta previa.

fetal distress.

prolapsed umbilical cord – this endangers the viability of the fetus because the vital supply of oxygen and nutrients is interrupted.

malpresentation of the fetus such as breech or transverse lie in the womb.

unsatisfactory previous pregnancies or deliveries.

a request from the mother.

Caesarean sections are usually performed using regional block anaesthesia induced by a spinal or epidural injection. This results in loss of feeling in the lower part of the body; the mother is conscious and the baby not exposed to potential risks from volatile anaesthetic gases inhaled by the mother during general anaesthesia. Post-operative complications are higher with general anaesthesia, but maternal anxiety and the likelihood that the operation might be complicated and di?cult are indications for using it. A general anaesthetic may also be required for an acute obstetric emergency. At operation the mother’s lower abdomen is opened and then her uterus opened slowly with a transverse incision and the baby carefully extracted. A transverse incision is used in preference to the traditional vertical one as it enables the woman to have a vaginal delivery in any future pregnancy with a much smaller risk of uterine rupture. Women are usually allowed to get up within 24 hours and are discharged after four or ?ve days. FORCEPS AND VENTOUSE DELIVERIES Obstetric forceps are made in several forms, but all are basically a pair of curved blades shaped so that they can obtain a purchase on the baby’s head, thus enabling the operator to apply traction and (usually) speed up delivery. (Sometimes they are used to slow down progress of the head.) A ventouse or vacuum extractor comprises an egg-cup-shaped metal or plastic head, ranging from 40 to 60 mm in diameter with a hollow tube attached through which air is extracted by a foot-operated vacuum pump. The instrument is placed on the descending head, creating a negative pressure on the skin of the scalp and enabling the operator to pull the head down. In mainland Europe, vacuum extraction is generally preferred to forceps for assisting natural deliveries, being used in around 5 per cent of all deliveries. Forceps have a greater risk of causing damage to the baby’s scalp and brain than vacuum extraction, although properly used, both types should not cause any serious damage to the baby.

Episiotomy Normal and assisted deliveries put the tissues of the genital tract under strain. The PERINEUM is less elastic than the vagina and, if it seems to be splitting as the baby’s head

moves down the birth canal, it may be necessary to cut the perineal tissue – a procedure called an episiotomy – to limit damage. This is a simple operation done under local anaesthetic. It should be done only if there is a speci?c indication; these include:

to hasten the second stage of labour if the fetus is distressed.

to facilitate the use of forceps or vacuum extractor.

to enlarge a perineum that is restricted because of unyielding tissue, perhaps because of a scar from a previous labour. Midwives as well as obstetricians are trained

to undertake and repair (with sutures) episiotomies.

(For organisations which o?er advice and information on various aspects of childbirth, including eclampsia, breast feeding and multiple births, see APPENDIX 2: ADDRESSES: SOURCES OF INFORMATION, ADVICE, SUPPORT AND SELF-HELP.)... pregnancy and labour

Urethra, Diseases Of And Injury To

Trauma Injury to the urethra is often the result of severe trauma to the pelvis – for example, in a car accident or as the result of a fall. Trauma can also result from catheter insertion (see CATHETERS) or the insertion of foreign bodies into the urethra. The signs are the inability to pass urine, and blood at the exit of the urethra. The major complication of trauma is the development of a urethral stricture (see below).

Urethritis is in?ammation of the urethra from infection.

Causes The sexually transmitted disease GONORRHOEA affects the urethra, mainly in men, and causes severe in?ammation and urethritis. Non-speci?c urethritis (NSU) is an in?ammation of the urethra caused by one of many di?erent micro-organisms including BACTERIA, YEAST and CHLAMYDIA.

Symptoms The classic signs and symptoms are a urethral discharge associated with urethral pain, particularly on micturition (passing urine), and DYSURIA.

Treatment This involves taking urethral swabs, culturing the causative organism and treating it with the appropriate antibiotic. The complications of urethritis include stricture formation.

Stricture This is an abrupt narrowing of the urethra at one or more places. Strictures can be a result of trauma or infection or a congenital abnormality from birth. Rarely, tumours can cause strictures.

Symptoms The usual presenting complaint is one of a slow urinary stream. Other symptoms include hesitancy of micturition, variable stream and terminal dribbling. Measurement of the urine ?ow rate may help in the diagnosis, but often strictures are detected during cystoscopy (see CYSTOSCOPE).

Treatment The traditional treatment was the periodic dilation of the strictures with ‘sounds’

– solid metal rods passed into the urethra. However, a more permanent solution is achieved by cutting the stricture with an endoscopic knife (optical urethrotomy). For more complicated long or multiple strictures, an open operation (urethroplasty) is required.... urethra, diseases of and injury to

Counter Irritant

An agent which produces vaso-dilation of peripheral blood vessels by stimulating nerve-endings of the skin to generate irritation intended to relieve deep-seated pain. Arnica, Balm of Gilead, Black Mustard, Bryony (white), Cajuput (oil of), Camphor, Canada Balsam, Cayenne, Eucalyptus, Nutmeg (oil of), Sassafras, Thuja. ... counter irritant

Cluster Headaches

Brief but severe headaches that recur up to several times a day over a few days. Cluster headaches affect one side of the head or face. The cause is uncertain but they may be due to dilation of blood vessels in the brain as in migraine. Beta-blocker drugs may be given to reduce the severity and frequency of cluster headaches.... cluster headaches

Delirium Tremens

A state of confusion accompanied by trembling and vivid hallucinations.

It usually arises in alcoholics after withdrawal or abstinence from alcohol.

Early symptoms include restlessness, agitation, trembling, and sleeplessness.

The person may develop a rapid heartbeat, fever, and dilation of the pupils.

Sweating, confusion, hallucinations, and convulsions may also occur.

Treatment consists of rest, rehydration, and sedation.

Vitamin injections, particularly of thiamine (see vitamin B complex), may be given.... delirium tremens

Abortion – To Prevent

Disruptive termination of pregnancy before twenty-eighth week. Too premature expulsion of contents of the pregnant womb may be spontaneous, habitual, or by intentional therapy. Untimely onset of uterine contractions with dilation of cervical os (mouth of the womb) dispose to abortion. Essential that services of a suitably qualified doctor or obstetrician be engaged. It would be his responsibility to ensure that the embryo (unborn baby) and the placenta (after birth) are completely expelled.

Alternatives. Tea: equal parts – Agnus Castus, Ladysmantle, Motherwort, Raspberry leaves, 1-2 teaspoon to each cup boiling water; infuse 5-10 minutes; 1 cup 2-3 times daily.

Tablets/capsules. Cramp bark, Helonias.

Powders. Formula. Combine Blue Cohosh 1; Helonias 2; Black Haw 3. Dose: 500mg (two 00 capsules or one-third teaspoon) thrice daily.

Practitioner. Tincture Viburnum prunifolium BHP (1983), 20ml; Tincture Chamaelirium luteum BHP (1983) 20ml; Tincture Viburnum opulus BHP (1983), 20ml; Tincture Capsicum, fort, BPC 1934, 0.05ml. Distilled water to 100ml. Sig: 5ml tds pc c Aq cal.

Black Cohosh. Liquid Extract Cimicifuja BP 1898, 1:1 in 90 per cent alcohol. Dosage: 0.3-2ml. OR: Tincture Cimicifuja, BPC 1934, 1:10 in 60 per cent alcohol. Dosage: 2-4ml.

Squaw Vine (mother’s cordial) is specific for habitual abortion, beginning soon after becoming pregnant and continuing until the seventh month. Also the best remedy when abortion threatens. If attended by a physician for abortion, a hypodermic of morphine greatly assists; followed by Liquid Extract 1:1 Squaw Vine. Dosage: 2-4ml, 3 times daily.

Liquid extracts. Squaw Vine, 4 . . . Helonias, 1 . . . Black Haw bark, 1 . . . Blue Cohosh, 1. Mix. Dose: One teaspoon every 2 hours for 10 days. Thereafter: 2 teaspoons before meals, 3 times daily. Honey to sweeten, if necessary. (Dr Finlay Ellingwood)

Abortion, to prevent: Cramp bark, (Dr John Christopher)

Evening Primrose. Two 500mg capsules, at meals thrice daily.

Diet: High protein.

Vitamins. C. B6. Multivitamins. E (400iu daily).

Minerals. Calcium. Iodine. Iron. Selenium, Zinc. Magnesium deficiency is related to history of spontaneous abortion; magnesium to commence as soon as pregnant.

Enforced bed rest. ... abortion – to prevent

Eclampsia

Pre-eclampsia. Toxaemia of last 3 months of pregnancy. Due to a number of causes, one of which is calcium deficiency. Calcium controls muscular spasms that are a feature of the condition. Eclampsia is due, in part, to a traffic jam of blood through the placenta causing a compensatory rise in blood pressure. Black women run 12 times the risk of developing pre-eclampsia during their first pregnancy as non-black women. (American researchers)

Women who use barrier contraceptives are more than twice as likely to develop pre-eclampsia in pregnancy than those using non-barrier methods. (North Carolina Memorial Hospital)

Symptoms. Headache, dizziness, nausea, upper abdominal pain, twitching of face and limbs, albumin in the urine. Extreme cases: high blood pressure, rigidity, congestive heart failure.

Treatment. Hospitalisation. To be treated by qualified obstetrician.

Formula. Cramp bark 2; Motherwort 1; Black Cohosh 1. Dose: Powders: 750mg (three 00 capsules or half a teaspoon). Liquid extracts: one to two 5ml teaspoons. Tinctures: 1-3 teaspoons. Hourly, or more frequently as tolerated; in water or honey. Magnesium sulphate for fits.

Suppression of urine. Dilation of kidney arterioles to increase flow of blood and to re-start kidney function.

Bearberry (Uva Ursi) tea. 1-2 teaspoon to each cup boiling water; infuse 15 minutes; 1 cup freely. Bearberry Liquid extract. 2-4ml hourly, or as tolerated, in water or honey.

White Willow. Conventional treatment places high-risk women on low-dose aspirin therapy. As White Willow is a source of natural aspirin, it would appear to offer some benefit. White Willow reduces platelet aggregation, and encourages placental blood flow. Aspirin of pharmacy cuts the risk of pregnancy-induced high blood pressure by two-thirds.

Diet. Pre-eclampsia: oily fish or fish oil supplements. (Journal of Obstetrics and Gynaecology 1990, 97 (12) 1077-79)

Supplements. Calcium. Magnesium.

Note: A serious condition which can be fatal but which can be prevented by regular antenatal examinations by a qualified obstetrician. ... eclampsia

Heart – Enlargement

A heart may dilate (enlarge) to compensate for valvular disease. One of two types: (1) Swelling (dilation) of the cavities with thickening of the walls, (hypertrophy of the heart muscle). (2) Dilation of cavities with thinning of the walls.

(1) Arises from the exertions of professional athletes. Extra strain enlarges the heart and calls for compensation. Other causes: high blood pressure and diseased valves.

(2) From anaemia, thyroid disorder, or extra strain demanded by fever. Thin walls always lead to heart weakness, robbing the organ of its maximum power.

Treatment. When compensation is delayed cardiac supportives include Bugleweed (American) to increase force of contractions of the heart and reduce the rate BHP (1983).

Right ventricular enlargement – Stone root.

Left ventricular enlargement – Lily of the Valley.

Both remedies have the advantage of being diuretics, thus aiding elimination of excess fluids.

Diet. See: DIET – HEART AND CIRCULATION. ... heart – enlargement

Fight-or-flight Response

Arousal of the sympathetic part of the autonomic nervous system in response to fear but which also occurs in anxiety disorders. Adrenaline (epinephrine), noradrenaline (norepinephrine), and other hormones are released from the adrenal glands and nervous system, leading to a raised heart-rate, pupil dilation, and increased blood flow to the muscles. These effects make the body more efficient in either fighting or fleeing the apparent danger.... fight-or-flight response

Flush

Reddening of the face, and sometimes the neck, caused by dilation of the blood vessels near the skin surface.

Flushing may occur during fever or as a result of embarrassment.

Hot flushes are common at the menopause.... flush

Oculomotor Nerve

The 3rd cranial nerve, controlling most of the muscles that move the eye. The oculomotor nerve also supplies the muscle that constricts the pupil, that which raises the upper eyelid, and the ciliary muscle, which focuses the eye. The nerve may be damaged due to a fracture to the base of the skull or a tumour. Symptoms include ptosis, squint, dilation of the pupil, inability to focus the eye, double vision, and slight protrusion of the eyeball. (See also trochlear nerve; abducent nerve.)... oculomotor nerve

Iritis

Inflammation of the iris.

Causes: juvenile polyarthritis, ankylosing spondylitis, sexually transmitted diseases, tuberculosis, injury, etc.

Symptoms. Eyeballs stuck down in the mornings from exudate, contraction of the pupil, pain, photophobia, discoloration of the iris. If exudate is with pus: Echinacea, Goldenseal, Poke root. Salmon- coloured zone around the cornea. Pupil fails to respond to light.

There is a type of eye inflammation associated with arthritic change in the body and which should not be mistaken for conjunctivitis but can be damaging to the eyeball. The iritis of early poker-spine is not local but internal and responds only to anti-arthritic and anti-inflammatory agents such as Guaiacum. Alternatives. Dilation of pupil by a mydriatic administered by a medical practitioner. Alternatives (internal):–

Black Cohosh: Dose: Liquid Extract: 5-15 drops. Tincture: 10-30 drops. Every two hours, acute cases, otherwise thrice daily.

Pulsatilla. Dose: Liquid Extract: 5-10 drops. Tincture: 10-20 drops. Acute cases: every two hours, otherwise thrice daily.

Formula. Tinctures, Eyebright and Goldenseal, equal parts. Dose: 10-20 drops in water or cup of German Chamomile tea.

Topical. Elderflower tea or lotion eye douche, morning and evening. Aloe Vera, gel or pulp from fresh plant leaves.

Supplements. Vitamins A, C, D, E. Zinc. ... iritis

Mustard, Common

 White or black mustard. Brassica alba L., Brassica nigra L. German: (white) Echter senf, (black) Senfkohl. French: (white) Moutarde blanche, (black) Moutarde noire. Spanish: Mostaza (black and white). Italian: Mostardo. Arabian: Khardal. Indian: Raigis. Malayan: Savi sasavi. Iranian: Sipandan. Seeds.

Constituents: sinigrin (black), sinalbin (white), mucilage, sinapine.

Action: diaphoretic, diuretic, emetic, rubefacient, stimulant. As a counter-irritant it induces inflammation causing dilation of blood vessels, thus increasing flow of blood to a specific area, externally.

Uses: Internal. As a tea for colds, influenza and early stage of fevers for profuse sweat to reduce a raised temperature. Hypothermia (quarter of a teaspoon powder in honey, banana mash or tea) to stimulate body heat. Today, rarely used internally.

Emetic: 1 tablespoon powder or seeds in pint tepid water.

Uses: External. As a poultice for painful chests to promote increased circulation for the relief of bronchitis, pleurisy, intercostal neuralgia. Chilblains. Cold, painful joints of old age.

Foot-bath: 1 tablespoon in muslin bag to 2 pints boiling water. Cool, stir well.

Preparations: As necessary. Quarter of a teaspoon powder to each cup boiling water (honey increases palatability).

Powder: sprinkle in boots or shoes for fisherman’s cold feet.

Oil: for cold arthritic joints: 1 part Mustard powder or seeds gently simmered in 20oz vegetable oil half hour. Strain. Bottle. external use only Internal use – practitioner only ... mustard, common

Aneurysm

Abnormal dilation (ballooning) of an artery caused by the pressure of blood flowing through a weakened area. Aneurysms most commonly affect the aorta and arteries supplying the brain. The most common cause of an aneurysm is atherosclerosis, a condition in which fatty deposits weaken the artery wall. The aorta is the usual site of atherosclerotic aneurysms.

Less commonly, aneurysms may be due to a congenital weakness of the artery walls. Most cerebral aneurysms, known as berry aneurysms because of their appearance, are congenital. Marfan’s syndrome, an inherited disorder in which the muscular layer of the aorta is defective, is often associated with aneurysms just above the heart. The as occurs in poly- artery wall arteritis nodosa.

Most aneurysms are symptomless and remain undetected, but if the aneurysm expands rapidly and causes pain, or it is very large, the symptoms are due to pressure on nearby structures. Aneurysms may eventually rupture, cause fatal blood loss, or, in the case of a cerebral aneurysm, loss of consciousness (see subarachnoid haemorrhage).

In some cases, only the inner layer of the artery wall ruptures, which allows blood to track along the length of the artery and block any branching arteries. There is usually severe pain and high risk of rupture occurring.

Aneurysms sometimes develop in the heart wall due to weakening of an area of heart muscle as a result of myocardial infarction. Such aneurysms seldom rupture but interfere with the pumping action of the heart.

Aneurysms of the aorta may be detected by ultrasound scanning, and cerebral aneurysms by CT scanning or MRI. Angiography provides information on all types of aneurysm. Ruptured or enlarged aneurysms require immediate surgery (see arterial reconstructive surgery). ... aneurysm

Plethora

A florid, bright-red, flushed complexion. It may be caused by dilation of blood vessels, or, less commonly, by polycythaemia.... plethora

Temperature

The degree of hotness of a body or substance. In the human body, the temperature must be maintained at around 37°C for optimum functioning. Body temperature is maintained by the hypothalamus, which monitors blood temperature and activates mechanisms to compensate for changes. When body temperature falls, shivering creates heat by muscle activity, and constriction of blood vessels in the skin minimizes heat loss. When the body temperature rises, sweating results in cooling, and dilation of blood vessels in the skin increases heat loss.... temperature

Angi

(angio-) combining form denoting blood or lymph vessels. Examples: angiectasis (abnormal dilation of); angiopathy (disease of); angiotomy (cutting of).... angi

Arteriole

n. a small branch of an *artery, leading into many smaller vessels – the *capillaries. By their constriction and dilation, under the regulation of the sympathetic nervous system, arterioles are the principal controllers of blood flow and pressure.... arteriole

Cervix

n. a necklike part, especially the cervix uteri (neck of the uterus), which projects at its lower end into the vagina. The cervical canal passes through it, linking the cavity of the uterus with the vagina; the canal is lined with mucous membrane (see endocervix) and normally contains mucus, the viscosity of which changes throughout the menstrual cycle. The cervix is capable of wide dilation during childbirth.... cervix

Antimuscarinic

(anticholinergic) adj. inhibiting the action of *acetylcholine, the neurotransmitter that conveys information in the parasympathetic nervous system. Antimuscarinic drugs block the effects of certain (muscarinic) receptors (hence their name). The actions of these drugs include relaxation of smooth muscle, decreased secretion of saliva, sweat, and digestive juices, and dilation of the pupil of the eye. *Atropine and similar drugs have these effects; they are used in the treatment of gut spasms (e.g. *propantheline) and of parkinsonism (e.g. *trihexyphenidyl) as bronchodilators (e.g. *ipratropium), and as *mydriatics. Characteristic side-effects include dry mouth, thirst, blurred vision, dry skin, increased heart rate, and difficulty in urination.... antimuscarinic

Cycloplegia

n. paralysis of the ciliary muscle of the eye (see ciliary body). This causes inability to alter the focus of the eye and is usually accompanied by paralysis of the muscles of the iris, resulting in fixed dilation of the pupil (mydriasis). It is induced by the use of atropine or similar drugs in order to inactivate the muscle in cases of inflammation of the iris and ciliary body and to objectively assess the refractive status of the eye, particularly in children. It may also occur after injuries to the eye.... cycloplegia

Endopyelotomy

n. a procedure for relieving obstruction of the junction between the kidney pelvis and ureter. An incision is made, via an endoscope, through the obstructed junction, using electrocautery, laser, or an endoscopic scalpel. Following this, *balloon dilation is usually performed and a *stent inserted.... endopyelotomy

Erythromelalgia

n. painful paroxysmal dilation of the blood vessels of the skin, usually affecting the extremities; the skin feels hot. Some patients may respond to aspirin.... erythromelalgia

Histamine

n. a compound derived from the amino acid histidine. It is found in nearly all tissues of the body, associated mainly with the *mast cells. Histamine has pronounced pharmacological activity, causing dilation of blood vessels and contraction of smooth muscle (for example, in the lungs). It is an important mediator of inflammation and is released in large amounts after skin damage (such as that due to animal venoms and toxins), producing a characteristic skin reaction (consisting of flushing, a flare, and a weal). Histamine is also released in anaphylactic reactions and allergic conditions, including asthma, and gives rise to some of the symptoms of these conditions. See also anaphylaxis; antihistamine.... histamine

Photophobia

n. discomfort caused by exposure to light. In most cases the light simply aggravates already existing discomfort from eye disease; contraction of the eyelids and other reactions aimed at avoiding the light follow. Photophobia may be associated with dilation of the pupils as a result of eye drops or with migraine, measles, German measles, meningitis, iritis, or disruption of the sensitive corneal epithelium.... photophobia

Physical

adj. (in medicine) relating to the body rather than to the mind. For example, a physical sign is one that a doctor can detect when examining a patient, such as abnormal dilation of the pupils or the absence of a knee-jerk reflex (see also functional disorder; organic disorder).... physical

Prostaglandin

n. one of a group of hormone-like substances present in a wide variety of tissues and body fluids (including the uterus, brain, lungs, kidney, and semen). Prostaglandins have many actions; for example, they cause contraction of smooth muscle (including that of the uterus), dilation of blood vessels, and are mediators in the process of inflammation (aspirin and other *NSAIDs act by blocking their production). They are also involved in the production of mucus in the stomach, which provides protection against acid gastric juice; use of NSAIDs reduces this effect and predisposes to peptic ulceration, the principal side-effect of these drugs. There are nine classes of prostaglandins (PGA–I), within which individual prostaglandins are denoted by numerals (e.g. PGE1). Synthetic prostaglandins are used to induce labour or produce abortion (see dinoprostone; gemeprost) and to treat peptic ulcers (see misoprostol), congenital heart disease in newborn babies (see alprostadil), and glaucoma (see latanoprost).... prostaglandin

Pyel

(pyelo-) combining form denoting the pelvis of the kidney. Example: pyelectasis (dilation of).... pyel

Antihistamine

treats allergic conditions; counteracts effects of histamine (which produces capillary dilation and, in larger doses, haemoconcentration).... antihistamine

Skin

n. the outer covering of the body, consisting of an outer layer, the *epidermis, and an inner layer, the *dermis (see illustration overleaf). Beneath the dermis is a layer of fatty tissue. The skin has several functions. The epidermis protects the body from injury and also from invasion by parasites. It also helps to prevent the body from becoming dehydrated. The combination of erectile hairs, *sweat glands, and blood capillaries in the skin form part of the temperature-regulating mechanism of the body. When the body is too hot, loss of heat is increased by sweating and by the dilation of the capillaries. When the body is too cold the sweat glands are inactive, the capillaries contract, and a layer of air is trapped over the epidermis by the erected hairs. The skin also acts as an organ of excretion (by the secretion of *sweat) and as a sense organ (it contains receptors that are sensitive to heat, cold, touch, and pain). The layer of fat that lies underneath the dermis can act as a reservoir of food and water. Anatomical name: cutis.... skin



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