Blood gas analyses on equine blood: required correction factors [see comment]

Correction factors have been determined to obtain the best estimates of PO2, PCO2 and pH in equine blood with standard blood gas and pH electrodes. There was a significant difference between the PO2 readings for tonometred blood of most horses and the equilibrating gas. Thus, if the PO2 electrode is...

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Bibliographic Details
Published inEquine veterinary journal Vol. 23; no. 6; p. 410
Main Author Fedde, M R
Format Journal Article
LanguageEnglish
Published United States 01.11.1991
Subjects
Animals
Blood Gas Analysis - standards
Blood Gas Analysis - veterinary
Calibration
Carbon Dioxide - blood
Electrodes - veterinary
Hematocrit - veterinary
Horses - blood
Hydrogen-Ion Concentration
Oxygen - blood
Temperature
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Summary:Correction factors have been determined to obtain the best estimates of PO2, PCO2 and pH in equine blood with standard blood gas and pH electrodes. There was a significant difference between the PO2 readings for tonometred blood of most horses and the equilibrating gas. Thus, if the PO2 electrode is calibrated with a gas, an electrode correction factor should be obtained by tonometring a blood sample from each horse. This factor was not dependent on packed cell volume. No such correction is required for the PCO2 electrode. If the animal's temperature differs from that of the analyser, the PO2, PCO2 and pH values must be corrected to the animal's body temperature. Temperature correction factors determined for equine blood were similar to those for human blood. Failure to make temperature corrections can result in errors for PO2 and PCO2 of 6 to 7 per cent per degree of temperature difference.
ISSN:0425-1644
DOI:10.1111/j.2042-3306.1991.tb03752.x