Amino-Aciduria and Enzymuria in Patients with Artificial Heart Valves
作者:
Patricia C.K. Chan,
W.H. Chow,
Sidney C.F. Tam,
Ignatius K.P. Cheng,
M.K. Chan,
期刊:
Nephron
(Karger Available online 1992)
卷期:
Volume 62,
issue 1
页码: 18-21
ISSN:1660-8151
年代: 1992
DOI:10.1159/000186988
出版商: S. Karger AG
关键词: Artificial heart valves;Intravascular haemolysis;Renal haemosiderosis;Amino-aciduria;Enzymuria;Proximal tubular dysfunction;Iron
数据来源: Karger
摘要:
Fifteen patients with artificial heart valves and evidence of chronic intravascular haemolysis were studied for proximal tubular dysfunction. Three patients had haemosiderinuria and haemoglobinuria; 2 had haemoglobinuria alone. Increased urinary amino acid nitrogen occurred in 8, raised fractional β2-microglobulin excretion in 2, hypophosphataemia in 4, renal glycosuria in 1 and enhanced fractional urate excretion in 1. Urinary N-acetyl-β-glucosaminidase (NAG) excretion increased in 7; the mean urinary NAG/creatinine ratio was raised to twice the upper limit of the normal range. Renal haemosiderosis due to chronic intravascular haemolysis could cause tubular injur
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