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A new procedure for the continuous measurement of oxygen consumption in pigs

Published online by Cambridge University Press:  27 March 2009

L. R. Giles ,
E. F. Annison ,
J. L. Black ,
R. G. Tucker  and
J. M. Gooden
L. R. Giles
Affiliation:
Department of Animal Science, University of Sydney, Camden, New South Wales 2570, Australia
E. F. Annison
Affiliation:
Department of Animal Science, University of Sydney, Camden, New South Wales 2570, Australia
J. L. Black
Affiliation:
CSIRO Division of Animal Production, PO Box 239, Blacktown, New South Wales 2148, Australia
R. G. Tucker
Affiliation:
Suite 5, Corner King and Queen Streets, Campbelltown, New South Wales 2560, Australia
J. M. Gooden
Affiliation:
Department of Animal Science, University of Sydney, Camden, New South Wales 2570, Australia
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Summary

Whole-body oxygen (O2) consumption was measured continuously in pigs from the product of blood flow through the pulmonary artery and arterio-venous (AV) difference of blood O2 content across the lungs (pulmonary AV procedure). Blood flow in the pulmonary artery, a measure of cardiac output, was monitored continuously using a transit-time ultrasound flow probe surgically implanted around the artery. The O2 content of pulmonary artery blood, which represents mixed venous blood O2 aturation (SvO2) was recorded continuously by fibre-optic oximetry. The relative constancy of arterial blood oxygen saturation (SaO2), obtained by catheterization of the saphenous artery, obviated the need for continuous monitoring. Complete recovery from surgical procedures, as indicated by the absence of infection and a return to pre-surgery food intake, occurred in 3–5 days. The combination of transit-time ultrasound and fibre-optic oximetry allowed the pulmonary AV procedure to provide continuous data on the oxygen consumption of growing pigs at high temperatures.

Type
Animals
Information
The Journal of Agricultural Science , Volume 124 , Issue 1 , February 1995 , pp. 113 - 118
Copyright
Copyright © Cambridge University Press 1995

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