| insemination, artificial, heterologous | Human artificial insemination in which the semen used is that of a man other than the woman's husband. (12 Dec 1998) |
|---|---|
| insemination, artificial, homologous | Human artificial insemination in which the husband's semen is used. (12 Dec 1998) |
| tooth, artificial | A fabricated tooth substituting for a natural tooth in a prosthesis. It is usually made of porcelain or plastic. (12 Dec 1998) |
| Jarvik artificial heart | A pneumatic artificial heart. (05 Mar 2000) |
| eye, artificial | A ready-made or custom-made prosthesis of glass or plastic shaped and coloured to resemble the anterior portion of a normal eye and inserted for cosmetic reasons in the socket of an enucleated or eviscerated eye. (12 Dec 1998) |
| yeast artificial chromosome | <molecular biology> A vector system that allows extremely large segments of DNA to be cloned. Useful in chromosome mapping, contiguous yeast artificial chromosomes covering the whole Drosophila genome and certain human chromosomes are available. Acronym: YAC (15 Nov 1997) |
| yeast artificial chromosomes | Yeast DNA sequences that have incorporated into them very large foreign DNA fragments; the recombinant DNA is then introduced into the yeast by transformation; the use of yeast artificial chromosomes permits the cloning of large genes with their flanking regulatory sequences. (05 Mar 2000) |
| kidney, artificial | Device(s) which can substitute for normally functioning kidneys in cleansing the blood. (12 Dec 1998) |
| urinary sphincter, artificial | An artifical implanted device, usually in the form of an inflatable silicone cuff, inserted in or around the bladder neck in the surgical treatment of urinary incontinence caused by sphincter weakness. Often it is placed around the bulbous urethra in adult males. The artificial urinary sphincter is considered an alternative to urinary diversion. (12 Dec 1998) |
| larynx, artificial | A device, activated electronically or by expired pulmonary air, which simulates laryngeal activity and enables a laryngectomised person to speak. Examples of the pneumatic mechanical device are the tokyo and van hunen artificial larynges. Electronic devices include the western electric electrolarynx, tait oral vibrator, cooper-rand electrolarynx and the ticchioni pipe. (12 Dec 1998) |
| liver, artificial | Devices for simulating the activities of the liver. They often consist of a hybrid between both biological and artificial materials. (12 Dec 1998) |
| ABO blood group | <haematology> The major human blood type system which describes the oligosaccharide glycoprotein antigens found on the surface of human blood cells. According to the type of antigen present, a person may be assigned a blood type of A, B, AB or O. A second type of antigen, the Rh factor, renders a positive or negative blood type. The ABO blood group system is important because it determines who can donate blood to or accept blood from whom. Type A or AB blood will cause an immune reaction in people with type B blood and type B and AB blood will cause a reaction in people with type A blood. Conversely, type O blood has no A or B antigens, so people with type O blood are universal donors. And since AB blood already produces both antigens, people who are type AB can accept any of the other blood types without suffering an immune reaction. (04 Jul 1999) |
| Almen's test for blood | Glacial acetic acid, gum guaiac solution, and hydrogen peroxide are added to an aqueous suspension of the suspected stain; if occult blood or blood pigment is present, a blue colour develops. Synonym: guaiac test, Schonbein's test, van Deen's test. (05 Mar 2000) |
| arterial blood | Blood that is oxygenated in the lungs, found in the left chambers of the heart and in the arteries, and relatively bright red. (05 Mar 2000) |
| arterial blood gas | A test which analyses arterial blood for oxygen, carbon dioxide and bicarbonate content in addition to blood pH. Used to test the effectiveness of respiration. Acronym: ABG (17 Oct 1997) |