Organ donation Health Dictionary

Organ Donation: From 1 Different Sources


The agreement of a person (or his or her family) to surgical removal of one or more organs for use in transplant surgery.

Most organs for transplantation, such as the heart, lungs, liver, and kidneys, are removed immediately after death, often in intensive care units where heart and lung function is sometimes maintained by machine after brain death been certified.

Compatible living donors may also be able to give a kidney (see tissue-typing).

People can facilitate use of their organs after death by informing relatives and carrying a donor card.

(See also corneal graft; heart–lung transplant; heart transplant; heart-valve surgery; kidney transplant; liver transplant.)

Health Source: BMA Medical Dictionary
Author: The British Medical Association

Organ

A collection of di?erent tissues that form a distinct structure in the body with a particular function or functions. The LIVER, for example, comprises a collection of di?erent metabolic cells bound together with connective tissue and liberally supplied with blood vessels; it performs vital functions in the breakdown of substances absorbed from the gastrointestinal tract. Other examples of organs are the KIDNEYS, BRAIN and HEART. (See also TRANSPLANTATION.)... organ

End Organ

A structure at the end of a peripheral nerve that acts as receptor for a sensation. For example, the olfactory nerves have end organs that identify smells.... end organ

Target Organ

The speci?c organ (or tissue) at which a hormone (see HORMONES), drug or other agent is aimed to bring about its physiological or pharmacological e?ect.... target organ

Organ Transplantation

See TRANSPLANTATION.... organ transplantation

Blood Donation

The process of giving blood for use in blood transfusion.

Donated blood is tested for a range of infectious agents such as hepatitis B and hepatitis C and antibodies to HIV. After being classified into blood groups, the blood is stored in a blood bank, either whole or separated into its different components (see blood products). Apheresis is a type of blood donation in which only a specific blood component, such as plasma, platelets, or white cells, is withdrawn from the donor. blood film A test that involves smearing a drop of blood on to a glass slide for examination under a microscope. The blood film is stained with dyes to make the blood cells show up clearly.

The test allows the shape and appearance of blood cells to be checked for any abnormality, such as the sickleshaped red blood cells characteristic of sickle cell anaemia.

The relative proportions of the different types of white blood cells can also be counted.

This examination, called a differential white cell count, may be helpful in diagnosing infection or leukaemia.

Blood films are also used in diagnosing infections, such as malaria, in which the parasites can be seen inside the red blood cells.

Blood films are usually carried out together with a full blood count.... blood donation

Altruistic Donation

a type of organ donation where the donor offers an organ (often a kidney) for transplantation into a stranger. This may form a chain of organ donation to allow a suitable match for the donor’s relative or partner if the pair are incompatible.... altruistic donation

Egg Donation

see oocyte donation.... egg donation

Golgi Tendon Organ

see tendon organ.... golgi tendon organ

Multi-organ Failure

(MOF) see multiple organ dysfunction syndrome.... multi-organ failure

Multiple Organ Dysfunction Syndrome

(MODS, multi-organ failure, multiple organ failure, MOF) a common cause of death following severe injury, overwhelming infection, or immune deficiency states.... multiple organ dysfunction syndrome

Oocyte Donation

(egg donation) the transfer of secondary *oocytes from one woman to another. Possible recipients include women with primary or secondary ovarian failure or severe genetic disorders, and women in whom ovulation has been suppressed as an incidental result of drug treatment for another condition (e.g. cancer). Pregnancy rates are higher than with *in vitro fertilization.... oocyte donation

Organ Of Corti

(spiral organ) the sense organ of the *cochlea of the inner ear, which converts sound signals into nerve impulses that are transmitted to the brain via the cochlear nerve. [A. Corti (1822–88), Italian anatomist]... organ of corti

Organ Of Jacobson

(vomeronasal organ) a small blind sac in the wall of the nasal cavity. In humans it never develops properly and has no function, but in lower animals (e.g. snakes) it is one of the major organs of olfaction. [L. L. Jacobson (1783–1843), Danish anatomist]... organ of jacobson

Sense Organ

a collection of specialized cells (*receptors), connected to the nervous system, that is capable of responding to a particular stimulus from either outside or inside the body. Sense organs can detect light (the eyes), heat, pain, and touch (the skin), smell (the nose), and taste (the taste buds).... sense organ

Spiral Organ

see organ of Corti.... spiral organ

Tendon Organ

(Golgi tendon organ) a sensory *receptor found within a tendon that responds to the tension or stretching of the tendon and relays impulses to the central nervous system. Like stretch receptors in muscle, tendon organs are part of the *proprioceptor system.... tendon organ



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