Direct oxymetric peripheral tissue perfusion monitoring during open heart surgery with the use of cardiopulmonary bypass: preliminary experience
Abstrakt
Background: Regional hypoperfusion has been associated with the development of postoperative organ dysfunction in cardiac surgery involving cardiopulmonary bypass (CPB). Method: Seven patients underwent on-pump coronary artery bypass grafting.
Direct oxymetry was performed by an optical cathether introduced into the deltoid muscle. Continuous measurement was made during the surgical procedure and the postoperative period.
Results: Interstitial muscle tissue oxygen tension (pO2) decreased after the introduction to anaesthesia and, more significantly, during CPB. There was a significant correlation of pO2 with mean arterial blood pressure and blood flow during that time.
Conclusion: The result of this first measurement seems to demonstrate that the standard technique of conducting cardiopulmonary bypass produces low muscle oxygen tension and, thus, little perfusion of skeletal muscle.