| RFA | resident functional atlas; right femoral artery; right frontoanterior [fetal position] |
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| RHC | resin hemoperfusion column; respiration has ceased; right heart catheterization; right hypochondrium... |
| RHS | Ramsay Hunt syndrome; Rapp-Hodgkin syndrome; reciprocal hindlimb-scratching [syndrome]; right hand s... |
| RML | radiation myeloid leukemia; regional medical library; right mediolateral; right middle lobe |
| RPV | right portal vein; right pulmonary vein |
| french pressure cell | A device used to cause cells to burst (or lyse) with hydrostatic pressure. The cells are suddenly forced into low pressure after being in high pressure. (09 Oct 1997) |
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| leak point pressure | Storage pressure in bladder at which leakage occurs passively, usually in patients with neuropathic bladder. (05 Mar 2000) |
| left atrial pressure | <radiology> 15-20 mm Hg redistribution 20-25 interstitial oedema 25-30 airspace oedema (12 Dec 1998) |
| lower body negative pressure | External decompression applied to the lower body. It is used to study orthostatic intolerance and the effects of gravitation and acceleration, to produce simulated haemorrhage in physiologic research, to assess cardiovascular function, and to reduce abdominal stress during childbirth. (12 Dec 1998) |
| low-pressure | Having, employing, or exerting, a low degree of pressure. Low-pressure steam engine, a steam engine in which low steam is used; often applied to a condensing engine even when steam at high pressure is used. See Steam engine. Source: Websters Dictionary (01 Mar 1998) |