azotemia(redirected from postrenal azotemia)
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Related to postrenal azotemia: azotemic, prerenal azotemia
an excess of nitrogenous waste products in the blood. (This is the most precise name for the condition, although in the literature it is commonly referred to as uremia.) See also uremia. adj., adj azote´mic.
An abnormal increase in concentration of urea and other nitrogenous substances in the blood plasma.
See also: uremia.
See also: uremia.
[azo- (azote) + G. haima, blood]
azotemia/az·o·te·mia/ (az″o-te´me-ah) uremia; an excess of urea or other nitrogenous compounds in the blood.
az′o·te′mic (-mĭk) adj.
Etymology: Fr, azote, nitrogen; Gk, haima, blood
retention of excessive amounts of nitrogenous compounds in the blood. This toxic condition is caused by failure of the kidneys to remove urea from the blood and is characteristic of uremia. Also spelled azotaemia. See also uremia. azotemic, adj.
azotemiaNephrology A higher than normal blood urea–BUN or other nitrogen-containing compounds in the blood; ↑ BUN may be: (1) prerenal, due to ↓ renal blood flow–with ↓ glomerular filtration rate–GFR and/or excess urea production, seen in dehydration, shock, ↓ blood volume, and CHF; (2) renal, with ↓ GFR due to acute or chronic renal failure; (3) postrenal, due to urinary tract obstruction or perforation with extravasation of urine; ↓ BUN occurs in pregnancy–due to ↑ GFR, malnutrition, high fluid intake, severe liver disease–↓ protein production. See Uremia.
The presence of excess nitrogenous wastes in the blood.
Mentioned in: Pneumocystis Pneumonia
an excess of nitrogen-containing compounds in the blood. See also uremia.
is caused by reduced renal blood flow caused by increased pressure within the renal collecting system, e.g. hydronephrosis and urine retention from a variety of causes.
is due to extrarenal causes that reduce renal blood flow and glomerular filtration, e.g. dehydration, shock, reduced cardiac output, decreased plasma albumin osmotic pressure.
primary renal azotemia
results from loss of renal functional parenchyma.