PMID: 5912210Jun 1, 1966

The effect of haemorrhage on venous return and regional blood flow in the anaesthetized cat

The Journal of Physiology
C V Greenway, A E Lawson

Abstract

1. In cats under pentobarbitone anaesthesia, a venous long-circuit technique was used to measure the blood flows in the superior vena cava and the hepatic, renal and iliac segments of the inferior vena cava. The sum of these flows gave the venous return (minus coronary and bronchial flows).2. In these preparations, the mean venous return was 130 ml./kg. Of this 28% came from the superior vena cava and 37% from the hepatic, 23% from the renal and 12% from the iliac segments of the inferior vena cava.3. After haemorrhage, the flows from all the venae cavae segments decreased. The quantitative changes varied with the particular cat, the degree and duration of the haemorrhage and whether the animal had been subjected to a previous haemorrhage.4. The proportion of the reduced venous return draining from the superior vena cava and the hepatic segment increased, that draining from the renal and iliac segments decreased. Vasoconstriction occurred in all vascular beds, but was greatest in the kidney and hind limbs. Thus the blood flow through the head and liver was partially maintained at the expense of that through the kidneys and hind limbs.5. Autoregulation of blood flow in the kidneys was usually seen immediately after the first rem...Continue Reading

Citations

Mar 1, 1969·British Journal of Pharmacology·A GeumeiM Mahfouz
Oct 1, 1978·Environmental Health Perspectives·S F Vatner
Jan 1, 1985·Research in Experimental Medicine. Zeitschrift Für Die Gesamte Experimentelle Medizin Einschliesslich Experimenteller Chirurgie·M H SchoenbergK E Arfors

Related Concepts

Blood Circulation
Felis catus
Limb Structure
Head
Hemorrhage
Kidney
Liver
Pulmonary Vascular Resistance
Veins
Inferior Vena Cava Structure

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