Breastbone Health Dictionary

Breastbone: From 3 Different Sources


The common name for the sternum, the front part of the thorax.
Health Source: BMA Medical Dictionary
Author: The British Medical Association

Clavicle

The bone which runs from the upper end of the breastbone towards the tip of the shoulder across the root of the neck. It supports the upper limb, keeps it out from the side, and gives breadth to the shoulders. The bone is shaped like an ‘f’ with two curves, which give it increased strength. It is, however, liable to be broken by falls on the hand or on the shoulder, and is the most frequently fractured bone in the body. (See BONE, DISORDERS OF.)... clavicle

Manubrium

The uppermost part of the STERNUM or breastbone.... manubrium

Heartburn

A burning sensation in the gullet, as felt behind the breastbone, caused by a laxity of the oesophago-gastric sphincter, with acid rising from the stomach. May be due to bending, tight clothing, hiatus hernia, acid dyspepsia or gastritis. Bitter acid taste in the mouth.

Alternatives. Most antacids relieve heartburn and gastric reflux in conditions such as acid dyspepsia, gastritis and hiatus hernia. Teas selected from Barberry, Black Horehound, Centuary, (Dr A. Vogel) Dandelion, Chamomile tea. (Charles Wesley) Marshmallow, Meadowsweet.

To give mucosal protection: Irish Moss, Iceland Moss, Slippery Elm. St John’s Wort. (Dr A. Vogel) Powders. Alternatives. (1) Meadowsweet 2; Galangal 1. (2) Equal parts: Dandelion root, Fennel. Doses: 500mg (two 00 capsules or one-third teaspoon) thrice daily.

Tinctures. Alternatives. (1) Dandelion 1; Meadowsweet 2; Liquorice root half. (2) Meadowsweet 2; Black Horehound 1. Liquorice half. Dose: One 5ml teaspoon in water thrice daily before meals. Tablets/capsules. Sarsaparilla, St John’s Wort. Meadowsweet. Iceland Moss. Slippery Elm.

Aloe Vera juice. 1-2 tablespoons juice from crushed leaves.

Nervous stomach. German Chamomile tea.

From alcohol and tobacco habit. Liquid Extract Stone root: 15-60 drops, (or Tincture BPC (1934) 30- 120 drops) in water thrice daily.

For heartburn of pregnancy – see PREGNANCY. Diet. Dandelion coffee. See: THE HAY DIET.

Avoid bending and stooping, eat small regular meals. Avoid hot spicy foods.

Avoid wearing tight clothing, cut out smoking. If suffering is at night, prop up head end of mattress by 4-6”. ... heartburn

Apex Beat

This is the beat of the APEX of the HEART, which can be felt through the skin to the left of the breastbone between the ?fth and sixth ribs.... apex beat

Sternum

The scienti?c name for the breastbone. This is a long, ?at, bony plate that comprises the central part of the chest. Made up of three parts: an upper triangular piece (manubrium); a middle part (the body); and at the bottom end the small, ?exible xiphoid process. The two clavicles articulate to the manubrium. Seven pairs of costal cartilages link the sternum to the ribs. The sternum is very strong and a powerful blow is needed to fracture it: such an injury may damage the underlying heart and lungs.... sternum

Xiphoid Process

Also known as the xiphisternum or xiphoid cartilage, this is the small oval-shaped projection forming the lowest of the three parts of the STERNUM or breastbone.... xiphoid process

Keloid

A raised, hard, irregularly shaped, itchy scar on the skin due to a defective healing process in which too much collagen is produced, usually after a skin injury.

Keloids can develop anywhere on the body, but the breastbone and shoulder are common sites.

Black people are affected more than whites.

After several months, most keloids flatten and cease to itch.

Injection of corticosteroid drugs into the keloid may reduce itchiness more quickly and cause some shrinkage.... keloid

Air Passages

These are the nose, pharynx or throat (the large cavity behind the nose and mouth), larynx, trachea or windpipe, and bronchi or bronchial tubes. On entering the nose, the air passes through a high narrow passage on each side, the outer wall of which has three projections (the nasal conchae). It then passes down into the pharynx where the food and air passages meet and cross. The larynx lies in front of the lower part of the pharynx and is the organ where the voice is produced (see VOICE AND SPEECH) by aid of the vocal cords. The opening between the cords is called the glottis, and shortly after passing this the air reaches the trachea or windpipe.

The windpipe leads into the chest and divides above the heart into two bronchi, one of which goes to each lung, in which it splits into ?ner and ?ner tubes (see LUNGS). The larynx is enclosed in two strong cartilages: the thyroid (of which the most projecting part, the Adam’s apple, is a prominent point on the front of the neck), and the cricoid (which can be felt as a hard ring about an inch below the thyroid). Beneath this, the trachea – which is sti?ened by rings of cartilage so that it is never closed, no matter what position the body is in – can be traced down until it disappears behind the breastbone.... air passages

Chest

The chest, or THORAX, is the upper part of the trunk. It is enclosed by the breastbone (sternum) and the 12 ribs which join the sternum by way of cartilages and are attached to the spine behind. At the top of the thorax, the opening in between the ?rst ribs admits the windpipe (TRACHEA), the gullet (OESOPHAGUS) and the large blood vessels. The bottom of the thorax is separated from the abdomen below by the muscular DIAPHRAGM which is the main muscle of breathing. Other muscles of respiration, the intercostal muscles, lie in between the ribs. Overlying the ribs are layers of muscle and soft tissue including the breast tissue.

Contents The trachea divides into right and left main bronchi which go to the two LUNGS. The left lung is slightly smaller than the right. The right has three lobes (upper, middle and lower) and the left lung has two lobes (upper and lower). Each lung is covered by two thin membranes lubricated by a thin layer of ?uid. These are the pleura; similar structures cover the heart (pericardium). The heart lies in the middle, displaced slightly to the left. The oesophagus passes right through the chest to enter the stomach just below the diaphragm. Various nerves, blood vessels and lymph channels run through the thorax. The thoracic duct is the main lymphatic drainage channel emptying into a vein on the left side of the root of the neck. (For diseases affecting the chest and its contents, see HEART, DISEASES OF; LUNGS, DISEASES OF; CHEST, DEFORMITIES OF.)... chest

Symphysis

An anatomical description of a joint in which two bones are connected by strong ?brous cartilage. One example is the joint between the two pubic bones in the front of the pelvis; another, the joint between the upper and middle parts of the breastbone.... symphysis

Cardiopulmonary Resuscitation

The administration of life-saving measures to a person who has suffered a cardiac arrest. A person in cardiac arrest is not breathing and has no detectable pulse or heartbeat. First, mouth-to-mouth resuscitation (see artificial respiration) is given; if this fails to restart breathing, repeated chest compressions, using the heel of

the hand, are applied to the lower breastbone until trained help arrives.

Both these measures are used to restore blood circulation to the brain.

Brain damage is likely if the brain is starved of oxygen for more than 3–4 minutes.... cardiopulmonary resuscitation

Chest Thrust

A first aid technique to unblock the airway in cases of choking. when abdominal thrusts would be dangerous (such as in infants) or impossible (such as in pregnant women). In a chest thrust, the first-aider places a fist in the other hand, and, pressing against the victim’s lower breastbone, thrusts the chest wall inwards up to 5 times. The pressure simulates the coughing reflex and may expel the obstruction.

chest X-ray One of the most frequently performed medical tests, usually carried out to examine the heart or lungs to confirm diagnoses of heart disorders and lung diseases. (See also X-rays.)... chest thrust

Chondritis

Inflammation of a cartilage, usually caused by pressure, stress, or injury.

Costochondritis is inflammation affecting the cartilage between the ribs and the sternum (breastbone).... chondritis

Diaphragm Muscle

The dome-shaped sheet of muscle that separates the chest from the abdomen. It is attached to the spine, ribs, and sternum (breastbone)

and plays an important role in breathing. There are openings in the diaphragm for the oesophagus and major nerves and blood vessels. To inhale, the diaphragm’s muscle fibres contract, pulling the whole diaphragm downwards and drawing air into the lungs. (See also breathing.)... diaphragm muscle

Bone

The framework upon which the rest of the body is built up. The bones are generally called the skeleton, though this term also includes the cartilages which join the ribs to the breastbone, protect the larynx, etc.

Structure of bone Bone is composed partly of ?brous tissue, partly of bone matrix comprising phosphate and carbonate of lime, intimately mixed together. The bones of a child are about two-thirds ?brous tissue, whilst those of the aged contain one-third; the toughness of the former and the brittleness of the latter are therefore evident.

The shafts of the limb bones are composed of dense bone, the bone being a hard tube surrounded by a membrane (the periosteum) and enclosing a fatty substance (the BONE MARROW); and of cancellous bone, which forms the short bones and the ends of long bones, in which a ?ne lace-work of bone ?lls up the whole interior, enclosing marrow in its meshes. The marrow of the smaller bones is of great importance. It is red in colour, and in it red blood corpuscles are formed. Even the densest bone is tunnelled by ?ne canals (Haversian canals) in which run small blood vessels, nerves and lymphatics, for the maintenance and repair of the bone. Around these Haversian canals the bone is arranged in circular plates called lamellae, the lamellae being separated from one another by clefts, known as lacunae, in which single bone-cells are contained. Even the lamellae are pierced by ?ne tubes known as canaliculi lodging processes of these cells. Each lamella is composed of very ?ne interlacing ?bres.

GROWTH OF BONES Bones grow in thickness from the ?brous tissue and lime salts laid down by cells in their substance. The long bones grow in length from a plate of cartilage (epiphyseal cartilage) which runs across the bone about 1·5 cm or more from its ends, and which on one surface is also constantly forming bone until the bone ceases to lengthen at about the age of 16 or 18. Epiphyseal injury in children may lead to diminished growth of the limb.

REPAIR OF BONE is e?ected by cells of microscopic size, some called osteoblasts, elaborating the materials brought by the blood and laying down strands of ?brous tissue, between which bone earth is later deposited; while other cells, known as osteoclasts, dissolve and break up dead or damaged bone. When a fracture has occurred, and the broken ends have been brought into contact, these are surrounded by a mass of blood at ?rst; this is partly absorbed and partly organised by these cells, ?rst into ?brous tissue and later into bone. The mass surrounding the fractured ends is called the callus, and for some months it forms a distinct thickening which is gradually smoothed away, leaving the bone as before the fracture. If the ends have not been brought accurately into contact, a permanent thickening results.

VARIETIES OF BONES Apart from the structural varieties, bones fall into four classes: (a) long bones like those of the limbs; (b) short bones composed of cancellous tissue, like those of the wrist and the ankle; (c) ?at bones like those of the skull; (d) irregular bones like those of the face or the vertebrae of the spinal column (backbone).

The skeleton consists of more than 200 bones. It is divided into an axial part, comprising the skull, the vertebral column, the ribs with their cartilages, and the breastbone; and an appendicular portion comprising the four limbs. The hyoid bone in the neck, together with the cartilages protecting the larynx and windpipe, may be described as the visceral skeleton.

AXIAL SKELETON The skull consists of the cranium, which has eight bones, viz. occipital, two parietal, two temporal, one frontal, ethmoid, and sphenoid; and of the face, which has 14 bones, viz. two maxillae or upper jaw-bones, one mandible or lower jaw-bone, two malar or cheek bones, two nasal, two lacrimal, two turbinal, two palate bones, and one vomer bone. (For further details, see SKULL.) The vertebral column consists of seven vertebrae in the cervical or neck region, 12 dorsal vertebrae, ?ve vertebrae in the lumbar or loin region, the sacrum or sacral bone (a mass formed of ?ve vertebrae fused together and forming the back part of the pelvis, which is closed at the sides by the haunch-bones), and ?nally the coccyx (four small vertebrae representing the tail of lower animals). The vertebral column has four curves: the ?rst forwards in the neck, the second backwards in the dorsal region, the third forwards in the loins, and the lowest, involving the sacrum and coccyx, backwards. These are associated with the erect attitude, develop after a child learns to walk, and have the e?ect of diminishing jars and shocks before these reach internal organs. This is aided still further by discs of cartilage placed between each pair of vertebrae. Each vertebra has a solid part, the body in front, and behind this a ring of bone, the series of rings one above another forming a bony canal up which runs the spinal cord to pass through an opening in the skull at the upper end of the canal and there join the brain. (For further details, see SPINAL COLUMN.) The ribs – 12 in number, on each side – are attached behind to the 12 dorsal vertebrae, while in front they end a few inches away from the breastbone, but are continued forwards by cartilages. Of these the upper seven reach the breastbone, these ribs being called true ribs; the next three are joined each to the cartilage above it, while the last two have their ends free and are called ?oating ribs. The breastbone, or sternum, is shaped something like a short sword, about 15 cm (6 inches) long, and rather over 2·5 cm (1 inch) wide.

APPENDICULAR SKELETON The upper limb consists of the shoulder region and three segments – the upper arm, the forearm, and the wrist with the hand, separated from each other by joints. In the shoulder lie the clavicle or collar-bone (which is immediately beneath the skin, and forms a prominent object on the front of the neck), and the scapula or shoulder-blade behind the chest. In the upper arm is a single bone, the humerus. In the forearm are two bones, the radius and ulna; the radius, in the movements of alternately turning the hand palm up and back up (called supination and pronation respectively), rotating around the ulna, which remains ?xed. In the carpus or wrist are eight small bones: the scaphoid, lunate, triquetral, pisiform, trapezium, trapezoid, capitate and hamate. In the hand proper are ?ve bones called metacarpals, upon which are set the four ?ngers, each containing the three bones known as phalanges, and the thumb with two phalanges.

The lower limb consists similarly of the region of the hip-bone and three segments – the thigh, the leg and the foot. The hip-bone is a large ?at bone made up of three – the ilium, the ischium and the pubis – fused together, and forms the side of the pelvis or basin which encloses some of the abdominal organs. The thigh contains the femur, and the leg contains two bones – the tibia and ?bula. In the tarsus are seven bones: the talus (which forms part of the ankle joint); the calcaneus or heel-bone; the navicular; the lateral, intermediate and medial cuneiforms; and the cuboid. These bones are so shaped as to form a distinct arch in the foot both from before back and from side to side. Finally, as in the hand, there are ?ve metatarsals and 14 phalanges, of which the great toe has two, the other toes three each.

Besides these named bones there are others sometimes found in sinews, called sesamoid bones, while the numbers of the regular bones may be increased by extra ribs or diminished by the fusion together of two or more bones.... bone

Cancer – Oesophagus

Usually epithelial in character, similar to that of the lips. Mostly in males.

Seldom before 45 years. Frequently in lower one-third of gullet. Dysphagia, with sense of obstruction on swallowing food. May perforate wall of trachea. Pain, worse at night, radiates from an exact spot. Eating hot food and drinking piping hot tea are heavily suspect.

At risk. Heavy smokers and alcoholics with depleted reserves of Vitamin A and zinc. These two factors play an important role in modern treatment.

Occurs in areas where the soil is low in molybdenum which causes plants to have a high level of nitrates. When such plants are stored they form nitrites which in turn form nitrosamines – which are carcinogens. Experimental rats given nitrous amines have a strong tendency to form cancer of the oesophagus. Eating pickled vegetables carries a high risk.

There are a few areas of the world where these adverse soil conditions pertain – one in Iran, another in Calvados, but the worst was in Lin Xian of the province of Honan, China. In Lin Xian, in the 1970s, it was found that villagers ate mainly persimmon and corn cakes and pickled vegetables. These, and their water, were high in nitrates. It was also their habit to eat mouldy bread which is high in amines – even nitrosamines. Their food was deficient in Vitamin C, which is likely to produce nitrous amines in the stomach.

The molybdenum problem was solved by sowing seeds with a fertiliser containing molybdenum. Piped water replaced old cistern wells and food was carefully stored. Even the chickens oesophageal cancers were cured. As a result of modern scientific investigation and treatment in which medicinal herbs made an important contribution, what was once a high gullet cancer area was resolved into one of the success stories of modern medicine.

Tannin has long been identified as a cancer-causing chemical, supported by findings of a high incidence of the disease among those who consume large quantities of tannin-containing beverages such as tea. Milk binds with tannin and is advised in tea-drinking where lemon is not taken.

Solid drugs and tablets should not be swallowed in the recumbent position without chewing a piece of banana.

Symptoms. (1) Sensation of obstruction when swallowing food. (2) Sharp pain behind breastbone. (3) “Something stuck in the gullet.” (4) Stomach ache, dry throat. (5) Belching when taking food. (6) Soreness of the upper back. (Dr Ge-ming, Lin Xian, Province of Honan, Chinese People’s Republic)

Of possible value. Alternatives:– Tea. Equal parts: Chaparral, Gotu Kola, Red Clover. 1 heaped teaspoon to each cup boiling water; infuse 15 minutes. Drink freely.

Powders. Combination. Goldenseal 1; Echinacea 2; Slippery Elm 3. Dose: 750mg (three 00 capsules or half a teaspoon). 3 or more times daily.

Tinctures. Combination. Goldenseal 1; Bayberry 1; Thuja 1; Condurango 1; Rosebay Willowherb 2. One teaspoon 3 or more times daily.

Chinese Herbalism. Powdered Huang yao-tzu 3 ch’ien, 3 times daily. Remedy is prepared by taking 12 liang of huang yao-tzu and steeping in 3 chin of white wine 24 hours. Then place huang yao-tzu in cold water and soak for another 7 days and 7 nights. Take out, dry and crush into powder. (A Barefoot Doctor’s Manual)

Diet. Leafy vegetables, carrots, tomatoes and fruit help to protect against the disease. Supplements. Especially Vitamin A, zinc and molybdenum.

Treatment by a general medical practitioner or hospital oncologist. ... cancer – oesophagus

Thoracotomy

An operation in which the chest is opened to provide access to organs in the chest cavity.

There are 2 types of thoracotomy: lateral and anterior. In a lateral thoracotomy the chest is opened between 2 ribs to provide access to the lungs, major blood vessels, and the oesophagus. In an anterior thoracotomy, an incision down the sternum (breastbone) provides access to the heart and the coronary arteries.... thoracotomy

Costal Cartilage

a cartilage that connects a *rib to the breastbone (*sternum). The first seven ribs (true ribs) are directly connected to the sternum by individual costal cartilages. The next three ribs are indirectly connected to the sternum by three costal cartilages, each of which is connected to the one immediately above it.... costal cartilage

Costochondritis

n. a painful condition of the chest wall, caused by inflammation in the joints between ribs and cartilage, breastbone and cartilage, or breastbone and clavicles. It can be caused by strenuous or repetitive movements. The condition is usually shortlived and resolves without treatment. Compare Tietze’s syndrome.... costochondritis

Coronary Heart Disease

The cause of: coronary occlusion, coronary blockage, coronary thrombosis. A heart attack occurs when a coronary artery becomes blocked by swellings composed, among other things, of cholesterol. Such swellings may obstruct the flow of blood leading to a blood clot (thrombus). Cholesterol is a major cause of CHD.

Coronary thrombosis is more common in the West because of its preference for animal fats; whereas in the East fats usually take the form of vegetable oils – corn, sunflower seed, sesame, etc. Fatty deposits (atheroma) form in the wall of the coronary artery, obstructing blood-flow. Vessels narrowed by atheroma and by contact with calcium and other salts become hard and brittle (arterio-sclerosis) and are easily blocked. Robbed of oxygen and nutrients heart muscle dies and is replaced by inelastic fibrous (scar) tissue which robs the heart of its maximum performance.

Severe pain and collapse follow a blockage. Where only a small branch of the coronary arterial tree is affected recovery is possible. Cause of the pain is lack of oxygen (Vitamin E). Incidence is highest among women over 40 who smoke excessively and who take The Pill.

The first warning sign is breathlessness and anginal pain behind the breastbone which radiates to arms and neck. Sensation as if the chest is held in a vice. First-line agent to improve flow of blood – Cactus.

For cholesterol control target the liver. Coffee is a minor risk factor.

Measuring hair calcium levels is said to predict those at risk of coronary heart disease. Low hair concentrations may be linked with poor calcium metabolism, high aortic calcium build-up and the formation of plagues. (Dr Allan MacPherson, nutritionist, Scottish Agricultural College, Ayr, Scotland)

Evidence has been advanced that a diagonal ear lobe crease may be a predictor for coronary heart disease. (American Journal of Cardiology, Dec. 1992)

Tooth decay is linked to an increased risk of coronary heart disease and mortality, particularly in young men. (Dr Frank De Stefano, Marshfield Medical Research Foundation, Wisconsin, USA) Treatment. Urgency. Send for doctor or suitably qualified practitioner. Absolute bedrest for 3 weeks followed by 3 months convalescence. Thereafter: adapt lifestyle to slower tempo and avoid undue exertion. Stop smoking. Adequate exercise. Watch weight.

Cardiotonics: Motherwort, Hawthorn, Mistletoe, Rosemary. Ephedra, Lily of the Valley, Broom.

Cardiac vasodilators relax tension on the vessels by increasing capacity of the arteries to carry more blood. Others contain complex glycosides that stimulate or relax the heart at its work. Garlic is strongly recommended as a preventative of CHD.

Hawthorn, vasodilator and anti-hypertensive, is reputed to dissolve deposits in thickened and sclerotic arteries BHP (1983). It is believed to regulate the balance of lipids (body fats) one of which is cholesterol.

Serenity tea. Equal parts: Motherwort, Lemon Balm, Hawthorn leaves or flowers. 1 heaped teaspoon to each cup boiling water; infuse 5-15 minutes; 1 cup freely.

Decoction. Combine equal parts: Broom, Lily of the Valley, Hawthorn. 1-2 teaspoons to each cup water gently simmered 20 minutes. Half-1 cup freely.

Tablets/capsules. Hawthorn, Motherwort, Cactus, Mistletoe, Garlic.

Practitioner. Formula. Hawthorn 20ml; Lily of the Valley 10ml; Pulsatilla 5ml; Stone root 5ml; Barberry 5ml. Tincture Capsicum 1ml. Dose: Powders: 500mg (two 00 capsules or one-third teaspoon). Liquid extracts: 1 teaspoon. Tinctures: 2 teaspoons. Thrice daily in water or honey.

Prevention: Vitamin E – 400iu daily.

Diet. See: DIET – HEART AND CIRCULATION.

Supplements. Daily. Vitamin C, 2g. Vitamin E possesses anti-clotting properties, 400iu. Broad spectrum multivitamin and mineral including chromium, magnesium selenium, zinc, copper.

Acute condition. Strict bed-rest; regulate bowels; avoid excessive physical and mental exertion. Meditation and relaxation techniques dramatically reduce coronary risk. ... coronary heart disease

Bone Imaging

Techniques for providing pictures that show the structure or function of bones. X-ray images are the most commonly used technique for diagnosing fractures and injuries. More detailed information is provided by tomography, CT scanning, or MRI, which can show tumours

cavities; it may be red or yellow. Red bone marrow is present in all bones at birth and is the factory for most of the blood cells. During the teens, red bone marrow is gradually replaced in some bones by less active yellow marrow. In adults, red marrow is confined chiefly to the spine, sternum, (breastbone), ribs, pelvis (hip-bones), scapulae (shoulderblades), clavicles (collarbones), and bones of the skull.

Stem cells within the red marrow are stimulated to form blood cells by the hormone erythropoietin.

Yellow marrow is composed mainly of connective tissue and fat.

If the body needs to increase its rate of blood formation, some of the yellow marrow will be replaced by red.

Sometimes marrow fails to produce sufficient numbers of normal blood cells, as occurs in aplastic anaemia (see anaemia, aplastic) or when marrow has been displaced by tumour cells.

In other cases, marrow may overproduce certain blood cells, as occurs in polycythaemia and leukaemia.... bone imaging

Funnel Chest

depression of the breastbone and inward curving of the costal cartilages articulating with it, resulting in deformity of the chest. It may displace the heart to the left and can cause slight breathlessness. Medical name: pectus excavatum.... funnel chest

Pigeon Chest

forward protrusion of the breastbone resulting in deformity of the chest. The condition is painless and harmless. Medical name: pectus carinatum.... pigeon chest

Plastron

n. the breastbone (*sternum) together with the costal cartilages attached to it.... plastron

Sternotomy

n. surgical division of the breastbone (sternum), performed to allow access to the heart and its major vessels.... sternotomy

Trachea

n. the windpipe: the part of the air passage between the *larynx and the main *bronchi, i.e. from just below the Adam’s apple, passing behind the notch of the *sternum (breastbone) to behind the angle of the sternum. The upper part of the trachea lies just below the skin, except where the thyroid gland is wrapped around it. —tracheal adj.... trachea

Bone Marrow Biopsy

A procedure to obtain a sample of cells from the bone marrow (aspiration biopsy) or a small core of bone with marrow inside (trephine biopsy). The sample is usually taken, under local anaesthesia, from the sternum (breastbone) or iliac crests (upper part of the hip-bones). Microscopic examination gives information on the development of the blood components

surrounding tissues. Radionuclide scanning detects areas throughout the skeleton in which there is high bone-cell activity. This type of scanning and on the presence of cells foreign to the marrow.

It is useful in the diagnosis of many blood disorders, including leukaemia and anaemia.

It can also show whether bone marrow has been invaded by lymphoma or cells from other tumours.... bone marrow biopsy

Bronchitis, Acute

A form of bronchitis that develops suddenly but usually clears up within a few days.

It is usually due to a viral infection.

Bacterial infection of the airways may occur as a complication.

Smokers, babies, elderly people, and those with lung disease are particularly susceptible.

The main symptoms are wheezing, shortness of breath, and a cough that produces yellow or green sputum.

There may also be pain behind the sternum (breastbone) and fever.

Symptoms may be relieved by drinking plenty of fluids and inhaling steam or using a humidifier.

Most cases clear up without further treatment, but acute bronchitis may be serious in people who already have lung damage.... bronchitis, acute

Pericarditis

Inflammation of the pericardium, which often leads to chest painand fever. There may also be an increased amount of fluid (effusion) in the pericardial space, which may restrict the heart. Long-term inflammation can cause constrictive pericarditis, a condition in which the pericardium becomes scarred, thickens, and contracts, interfering with the heart’s action.

Causes of pericarditis include infection; myocardial infarction; cancer spreading from another site; and injury to the pericardium. The disorder may accompany rheumatoid arthritis, systemic lupus erythematosus, and kidney failure.

Pericarditis causes pain behind the breastbone, and sometimes in the neck and shoulders. There may also be fever. Constrictive pericarditis causes oedema of the legs and abdomen.

Diagnosis is made from a physical examination and an ECG and chest X-rays or echocardiography. If possible, treatment is aimed at the cause. Analgesic drugs or anti-inflammatory drugs may be given. If an effusion is present, fluid may be drawn off through a needle. In constrictive pericarditis, part of the pericardium may be removed.... pericarditis

Diaphragm

n. 1. (in anatomy) a thin musculomembranous dome-shaped muscle that separates the thoracic and abdominal cavities. The diaphragm is attached to the lower ribs at each side and to the breastbone and the backbone at the front and back. It bulges upwards against the heart and the lungs, arching over the stomach, liver, and spleen. There are openings in the diaphragm through which the oesophagus, blood vessels, and nerves pass. The diaphragm plays an important role in *breathing. It contracts with each inspiration, becoming flattened downwards and increasing the volume of the thoracic cavity. With each expiration it relaxes and is restored to its dome shape. 2. a hemispherical rubber cap fitted inside the vagina over the neck (cervix) of the uterus as a contraceptive. When combined with the use of a chemical spermicide the diaphragm provides reliable contraception with a failure rate as low as 2–10 pregnancies per 100 woman-years.... diaphragm



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