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The Urinary Excretion of Haemoglobin in the Isolated Normothermic-Perfused Dog Kidney

The Urinary Excretion of Haemoglobin in the Isolated Normothermic-Perfused Dog Kidney The isolated kidney handles haemoglobin in the same manner as the kidney in vivo. There is no excretion of haemoglobin when the haemoglobin-binding capacity is not saturated. When this is done and a free plasma haemoglobin level exists, the clearance of free haemoglobin had an average value of 3.24 ± 2.92 ml/min. The glomerular clearance ratio of haemoglobin averaged 0.10 ± 0.06. The calculated rate of tubular reabsorption of haemoglobin was 2.06 ± 3.12 mg/min. The graphic relationship between urinary excretion and plasma levels of free haemoglobin was linear. The theoretical plasma level above which haemoglobinuria occurred was 64.0 ± 35.2 mg%. These last two data are more suggestive of tubular reabsorptive activity than the calculated values. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Haematologica Karger

The Urinary Excretion of Haemoglobin in the Isolated Normothermic-Perfused Dog Kidney

Acta Haematologica , Volume 47 (2): 11 – Jan 1, 2009

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Publisher
Karger
Copyright
© 1972 S. Karger AG, Basel
ISSN
0001-5792
eISSN
1421-9662
DOI
10.1159/000208501
Publisher site
See Article on Publisher Site

Abstract

The isolated kidney handles haemoglobin in the same manner as the kidney in vivo. There is no excretion of haemoglobin when the haemoglobin-binding capacity is not saturated. When this is done and a free plasma haemoglobin level exists, the clearance of free haemoglobin had an average value of 3.24 ± 2.92 ml/min. The glomerular clearance ratio of haemoglobin averaged 0.10 ± 0.06. The calculated rate of tubular reabsorption of haemoglobin was 2.06 ± 3.12 mg/min. The graphic relationship between urinary excretion and plasma levels of free haemoglobin was linear. The theoretical plasma level above which haemoglobinuria occurred was 64.0 ± 35.2 mg%. These last two data are more suggestive of tubular reabsorptive activity than the calculated values.

Journal

Acta HaematologicaKarger

Published: Jan 1, 2009

Keywords: Haemolysis; Haptoglobin; Plasma haemoglobin; Dog kidney; Haemoglobinaemia; Haemoglobinuria

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