| O2 | both eyes; diatomic oxygen; molecular oxygen |
|---|---|
| PaO2 | partial oxygen tension in arterial blood; partial pressure of oxygen in arterial blood |
| QO2 | oxygen quotient; oxygen utilization |
| TA | alkaline tuberculin; arterial tension; axillary temperature; tactile afferent; Takayasu arteritis; t... |
| TAC | tachykinin; terminal antrum contraction; tetracaine, adrenalin, and cocaine; time-activity curve; to... |
| total aphasia | In which all aspects of speech and communication are severely impaired. at best, patients can understand or speak only a few words or phrases; they cannot read or write. Synonym: mixed aphasia, total aphasia. (05 Mar 2000) |
|---|---|
| total ascertainment | Method by which all members of a population at risk of a trait are discerned or equally likely to be contained in a sample thereof. (05 Mar 2000) |
| total body hypothermia | The deliberate reduction of total body temperature, in order to reduce tissue metabolism. (05 Mar 2000) |
| total body irradiation | Radiotherapy often given in several doses prior to bone marrow transplantation with the aim of killing any residual leukaemia in the patient. It is used in conjunction with high-dose anti-cancer drugs. The procedure and its side-effects will be discussed individually with the patient. (13 Nov 1997) |
| total body water | The sum of intracellular water and extracellular water (volume). About 60% of body weight. (05 Mar 2000) |
| total breech extraction | Delivery of a foetus in breech presentation with complete extraction of the entire foetal body from the uterus. (05 Mar 2000) |
| total cataract | A cataract involving the entire lens. (05 Mar 2000) |
| total catecholamine test | A fluorometric determination of catecholamines in 24-hr urine specimens; elevated values are seen in patients with pheochromocytoma and neuroblastoma; spurious elevations may be seen due to excretion products of medication containing adrenaline, tetracyclines, quinidine, and some antihypertensive agents; false-positive elevations may be seen in persons with extensive burns, in vigorous exercise, or in progressive muscular dystrophy. (05 Mar 2000) |
| total cell count | Number of cells in a given area or volume. (05 Mar 2000) |
| total cholesterol | A combination of the LDL, HDL and VLDL levels in the bloodstream. This is the cholesterol measurement that is given by the standard home cholesterol test kit. Less than 200 is desirable, 200 to 239 is considered borderline high, over 240 is considered high. (27 Sep 1997) |
| total cleavage | Cleavage in which the blastomeres are completely separated; the entire egg participates in cell division. Synonym: complete cleavage, total cleavage. (05 Mar 2000) |
| total cystectomy | Removal of the entire bladder. (05 Mar 2000) |
| total dissolved solids | A measure of inorganic and organic materials dissolved in water (passing through a 0.45 micron filter), expressed as mg/l FR. Sometimes considered similar to conductivity as an indicator of potential production in habitat quality indices. (09 Oct 1997) |
| total elasticity of muscle | The combined effect of physical and physiologic elasticity of muscle. (05 Mar 2000) |
| total end-diastolic diameter | Cross sectional diameter of the left ventricle including the septum and posterior wall thicknesses in diastole. (05 Mar 2000) |