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Blood gas analyses on equine blood: required correction factors
Author(s) -
FEDDE M. R.
Publication year - 1991
Publication title -
equine veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 87
eISSN - 2042-3306
pISSN - 0425-1644
DOI - 10.1111/j.2042-3306.1991.tb03752.x
Subject(s) - horse , electrode , chemistry , whole blood , analyser , analytical chemistry (journal) , zoology , chromatography , surgery , medicine , biology , paleontology
Summary Correction factors have been determined to obtain the best estimates of PO 2 , PCO 2 and pH in equine blood with standard blood gas and pH electrodes. There was a significant difference between the PO 2 readings for tonometred blood of most horses and the equilibrating gas. Thus, if the PO 2 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 PCO 2 electrode. If the animal's temperature differs from that of the analyser, the PO 2 , PCO 2 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 PO 2 and PCO 2 of 6 to 7 per cent per degree of temperature difference.