Abstract
Transcutaneous oxygen and carbon dioxide tension (tcPO2 and tcPCO2) in 5 anesthetized dogs were continuously measured by using a gas monitor PO-550 (Sumitomo Electric Industries, Ltd) . The sensor was attached at the inside of the thigh, and its temperature was maintained at 44°C throughout the experiment. Simultaneously the femoral arterial blood samples were taken for the determination of PaO2 and PaCO2. In 4 dogs, concentration of inhalant oxygen gas varied from 100 to 0% step by step at the 10-30 minutes intervals by adding the N2O gas. In the other dog, abdominal artery was clamped by Satinsky forceps after performing laparotomy. The dog was inhaled the N2O gas at 31/min for 8 minutes following the inhalation of oxygen gas at 31/min for 10 minutes.
As a result, there was significant correlation between tcPO2 and PaO2 (r=0.867-0.899) . But the similar correlation between tcPCO2 and PaCO2 was not obtained.
In conclusion, this machine is thought to be a quite useful for the monitoring of respiratory and circulatory conditions in anesthetized dogs.
