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Temperature during cardiopulmonary bypass for coronary artery operations does not influence postoperative cognitive
G Plourde1, A S Leduc, J E Morin
1Department of Anesthesia, Royal Victoria Hospital, Montreal, Quebec, Canada. mdgp@musica.mcgill.ca
The Journal of Thoracic and Cardiovascular Surgery
|July 1, 1997
Summary
Cardiopulmonary bypass temperature during heart surgery does not affect cognitive outcomes. Both warm and cold bypass methods resulted in similar postoperative cognitive function changes in patients.
Area of Science:
- Cardiac Surgery
- Neuroscience
- Anesthesiology
Background:
- Postoperative cognitive dysfunction (POCD) is a concern following cardiac surgery.
- The impact of cardiopulmonary bypass (CPB) temperature on cognitive function remains debated.
Purpose of the Study:
- To investigate the influence of CPB temperature on postoperative cognitive function in patients undergoing coronary artery bypass grafting (CABG).
Main Methods:
- A prospective, double-blind, randomized study involving 62 patients undergoing coronary operations.
- Patients were randomized to either warm (36°C) or cold (28°C) CPB.
- Neuropsychological evaluations were conducted preoperatively and 7 days postoperatively by an blinded observer.
Main Results:
- Fifty-four patients completed the study.
- Both warm and cold CPB groups exhibited significant postoperative decline in psychomotor coordination and verbal memory (p < 0.01).
- No significant differences in cognitive outcomes were observed between the warm and cold CPB groups.
Conclusions:
- CPB temperature during coronary operations does not appear to influence postoperative cognitive function.
- Cognitive function changes observed post-CABG are independent of whether warm or cold CPB is utilized.