STUDIES OF CONTROLLED RESPIRATION DURING THE GOF ANESTHESIA AT INTACT AND OPEN CHEST IN DOGS

Abstract

The purpose of this paper is to clarify the suitable ventilation volume, the air way pressure and the effects during controlled respiration at GOF anesthesia in dogs.The suitable tidal volume was 23.3±3.9 ml/kg (M±S.D.) and the suitable air way pressure was 10.4±1.1 cmH2O (M±S.D.) at intact chest.The suitable tidal volume was 24.6±4.8 ml/kg (M±S.D.) and the suitable air way pressure was 10.8±1.7 cmH2O (M±S.D.) at open chest. In effects of the suitable ventiration, the arterial blood pressure showed decrease of 23.2% at intact chest and decrease of 36.2% at open chest. PaO2 showed a slight decrement in open chest. But these parameters retured to the pre-controlled respiration levels after spontaneous respiration. The remarkable variation of acid bace balance were did not shown during controlled respiration.