Original Article

Technique to Give Relevance to Calculated Oxygen Transfer During Cardiopulmonary Bypass^*

¹ Emory University Clinic and Hospitals, Atlanta, Georgia
² Extracorporeal Systems Department, Bentley Laboratories Incorporated, Irvine, California

^** Address for correspondence; Jeffrey B. Riley, 2459 Big Creek Terrace, Stone Mountain, GA 30087.

Received: 29 September 1982
Revised: 3 February 1983
Accepted: 10 March 1983

Abstract

A technique to give relevance to results of oxygen transfer calculation during total cardiopulmonary bypass is presented.

An accurate calculation scheme to quantitate total blood oxygen transfer is outlined. Clinical relevance is given to the oxygen transfer calculation result by reporting the value as a percent of an expected oxygen transfer rate. An expected oxygen transfer value is predicted from large population metabolic rate study results employing patient sex, age, body surface area, and temperature.

Calculating the percent of expected oxygen consumption value will benefit the perfusionist by increasing the validity of CPB management decisions. The calculation of actual oxygen consumption will aid the perfusionist in selecting an appropriate artificial oxygenator ventilation rate and patient blood flow.