| extraction | The process or act of pulling or drawing out. Origin: L. Trahere = to draw (18 Nov 1997) |
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| extraction and processing industry | The industry concerned with the removal of raw materials from the earth's crust and with their conversion into refined products. (12 Dec 1998) |
| extraction coefficient | The percentage of a substance removed from the blood or plasma in a single passage through a tissue; e.g., the extraction coefficient for p-aminohippuric acid (PAH) in the kidney is the difference between arterial and renal venous plasma PAH concentrations, divided by the arterial plasma PAH concentration. (05 Mar 2000) |
| extraction, obstetrical | Extraction of the foetus by means of obstetrical instruments. (12 Dec 1998) |
| extraction ratio | The fraction of a substance removed from the blood flowing through the kidney; it is calculated from the formula (A -V)/A, where A and V, respectively, are the concentrations of the substance in arterial and renal venous plasma. (05 Mar 2000) |
| radical mastectomy, total | Breast cancer treatment involving removal of the breast, the pectoral (chest) muscles, lymph nodes (the glands ) in the armpit and associated skin and subcutaneous tissue. (12 Dec 1998) |
| parenteral nutrition, home total | The at-home administering of nutrients for assimilation and utilization by a patient whose sole source of nutrients is via solutions administered intravenously, subcutaneously or by some other non-alimentary route. (12 Dec 1998) |
| parenteral nutrition, total | The delivery of nutrients for assimilation and utilization by a patient whose sole source of nutrients is via solutions administered intravenously, subcutaneously, or by some other non-alimentary route. The basic components of tpn solutions are protein hydrolysates or free amino acid mixtures, monosaccharides, and electrolytes. Components are selected for their ability to reverse catabolism, promote anabolism, and build structural proteins. (12 Dec 1998) |
| reversal of organs, total | This condition (medically called situs inversus totalis) involves complete transposition (right to left reversal) of the thoracic and abdominal organs. The heart is not in its usual position in the left chest but is on the right. Specifically related to the heart, this is referred to as dextrocardia (literally, right-hearted). And the stomach, which is normally in the left upper abdomen, is on the right. In patients with situs inversus totalis, all of the chest and abdominal organs are reversed and appear in mirror image when examined or visualised by tests such as X-ray filming. Situs inversus totalis has been estimated to occur once in about 6-8,000 births. Situs inversus occurs in a rare abnormal condition that is present at birth (congenital) called kartagener's syndrome. (12 Dec 1998) |
| communication methods, total | Utilization of all available receptive and expressive modes for the purpose of achieving communication with the hearing impaired, such as gestures, postures, facial expression, types of voice, formal speech and non-speech systems, and simultaneous communication. (12 Dec 1998) |
| congenital total lipodystrophy | Lipodystrophy characterised by almost complete lack of subcutaneous fat, accelerated rate of growth and skeletal development during the first 3 to 4 years of life, muscular hypertrophy, cardiac enlargement, hepatosplenomegaly, hypertrichosis, renal enlargement, hypertriglyceridemia, and hypermetabolism; both autosomal dominant and X-linked varieties exist. (05 Mar 2000) |
| hysterectomy, total | Complete surgical removal of the uterus and cervix. Also called a complete hysterectomy. (12 Dec 1998) |
| near-total thyroidectomy | Removal of nearly all of each thyroid lobe leaving unresected only a small portion of gland adjacent to the entrance of the recurrent laryngeal nerve into the larynx. (05 Mar 2000) |
| total | Whole; not divided; entire; full; complete; absolute; as, a total departure from the evidence; a total loss. " Total darkness." "To undergo myself the total crime." Total abstinence. See Abstinence. Total depravity. See Original sin, under Original. Synonym: Whole; entire; complete. See Whole. Origin: F, fr. LL. Totalis, fr. L. Tolus all,whole. Cf. Factotum, Surtout, Teetotum. Source: Websters Dictionary (01 Mar 1998) |
| total anomalous pulmonary venous return | <radiology> (TAPVR) admixture lesion: cyanosis, increased pulmonary blood flow, must have L to R shunt for survival (e.g., atrial septal defect) associated with, atrial septal defect, asplenia (12 Dec 1998) |