Normal arterial blood pH, oxygen, and carbon dioxide tensions in unanesthetized dogs

Abstract

Femoral artery blood samples from 30 unanesthetized unrestrained nonpanting dogs were analyzed. Average normal pH was 7.42 (sd 0.03), mean Po2 89.5 mm Hg (sd 4.4), and Pco2 36.8 mm Hg (sd 2.4). pH was determined with a glass electrode. Pco2 was measured using a Severinghaus electrode. Po2 was determined with a Clark-type polarographic polypropylene-covered electrode. Measurements were made at 39 C (normal dog rectal temperature). blood gas; Clark electrode; Severinghaus electrode