Mindblown: a blog about philosophy.
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Astasia
Inability to stand or maintain erect posture due to muscular incoordination. An inability to stand for which no physical cause can be found. Astasia-abasia is an inability to stand or walk in the absence of any recognizable physical illness. The patient’s attempts are bizarre and careful examination reveals contradictory features. It is often an expression…
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Assist-control ventilation
Mechanically supported breathing where the patient is permitted to initiate breathing but the ventilator delivers a preset volume of air and will initiate breathing if the patient’s breathing slows or stops.
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Aspartate aminotransferase test
Intracellular enzyme test to detect tissue damage in the liver, brain, and muscles. An intracellular enzyme involved in amino acid and carbohydrate metabolism. It is present in high concentrations in muscle, liver, and brain. An increased level of this enzyme in the blood indicates necrosis or disease in these tissues. Formerly called serum glutamic-oxaloacetic transaminase…
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Asaphia
Inability to produce clear and distinct speech.
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Arthrocentesis
Removal of excess fluid in a joint by inserting a needle into the joint space. Entry into a joint space with a needle to remove fluid. A medical technique involving the insertion of a needle by the physician into the patient’s joint to extract fluid for diagnostic analysis or to evacuate infected fluid from the…
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Arteriovenous fistula
A surgical joining of arterial and venous vessels in order to gain access to circulation during hemodialysis An abnormal direct connection between an artery and vein. Blood flows from the artery into the vein through the fistula, bypassing the bed of capillaries (very small blood vessels) that normally lie between them. If a fistula is…
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Arteriostenosis
Narrowing of the lumen of an artery; may be temporary or permanent.
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Arteriorrhexis
Rupture of an artery.
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Arachnoid layer
The middle layer of the three meninges covering the central nervous system.
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Apoplexia
Sudden, gross bleeding in an organ; stroke caused by bleeding in the brain.
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