| PIP | paralytic infantile paralysis; peak inflation pressure, peak inspiratory pressure; periodic interim ... |
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| PVP | penicillin V potassium; peripheral vein plasma; peripheral venous pressure; polyvinylpyrrolidone; po... |
| SFP | screen filtration pressure; simultaneous foveal perception; spinal fluid pressure; stopped flow pres... |
| VP | physiological volume; vapor pressure; variegate porphyria; vascular permeability; vasopressin; velop... |
| NREM | Non-Rapid Eye Movement |
| diastolic blood pressure | The pressure exerted on the walls of the arteries when the heart is in the relaxation phase (diastole). Considered abnormally elevated if consistently over 90 mmhg. (27 Sep 1997) |
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| diastolic pressure | The intracardiac pressure during or resulting from diastolic relaxation of a cardiac chamber; the lowest arterial blood pressure reached during any given ventricular cycle. (05 Mar 2000) |
| differential blood pressure | The arterial blood pressure at corresponding points on the two sides of the body. (05 Mar 2000) |
| Donders' pressure | An increase of about 6 mm Hg shown by a manometer connected with the trachea when the thorax of the dead body is opened; it is caused by the collapse of the lungs when air is admitted to the thorax. (05 Mar 2000) |
| intermittent positive-pressure breathing | Application of positive pressure to the inspiratory phase of spontaneous respiration. See: controlled mechanical ventilation (12 Dec 1998) |
| intermittent positive-pressure ventilation | Application of positive pressure to the inspiratory phase when the patient has an artificial airway in place and is connected to a ventilator. See: controlled mechanical ventilation (12 Dec 1998) |
| intra-arterial pressure | The pressure of the blood within an artery, the arterial pressure. Also called the arterial tension. (12 Dec 1998) |
| intracardiac pressure curve | Curve of pressure recorded within the atrium or ventricle (intra-atrial and intraventricular pressure curve's). (05 Mar 2000) |
| intracranial pressure | <physiology> The pressure the cerebrospinal fluid exerts on the brain. (27 Sep 1997) |
| intraocular pressure | <ophthalmology> The pressure the fluid (vitreous) contained within the eye, exerts on the globe (lining of the eyeball). Increased intraocular pressure is a feature of glaucoma. (27 Sep 1997) |
| intraocular pressure monitoring | <ophthalmology, technique> This is procedure which measures the pressure inside the eyes. This is a screening test for glaucoma. This test is performed by an ophthalmologist. (27 Sep 1997) |
| isovolume pressure-flow curve | The relationship between transpulmonary pressure and respiratory air flow, expressed as a function of lung volume. (05 Mar 2000) |
| occlusal pressure | Any force exerted upon the occlusal surfaces of teeth. Synonym: biting pressure. (05 Mar 2000) |
| oncotic pressure | Osmotic pressure exerted by colloids in solution. (05 Mar 2000) |
| osmotic pressure | See: osmosis. The pressure required to prevent osmotic flow across a semi permeable membrane separating two solutions of different solute concentration. Equal to the pressure that can be set up by osmotic flow in this system. (18 Nov 1997) |