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Perfusion temperature during cardiopulmonary bypass does not affect serum S-100beta release
M Dworschak1, A Lassnigg, G Tenze
1Department of Cardiothoracic and Vascular Anesthesia and Intensive Care, General Hospital Vienna, Austria. martin.dworshak@univie.ac.at
The Thoracic and Cardiovascular Surgeon
|March 6, 2004
Summary
Normothermia during cardiopulmonary bypass (CPB) did not show increased cerebral injury markers compared to moderate hypothermia. S-100beta levels and neurological outcomes were similar in both groups, suggesting safety for normothermic CPB.
Area of Science:
- Cardiovascular Surgery
- Neuroscience
- Critical Care Medicine
Background:
- The impact of maintaining normal body temperature (normothermia) during cardiopulmonary bypass (CPB) on neurological outcomes remains a subject of debate.
- Concerns exist regarding potential neurological damage associated with normothermic CPB.
Purpose of the Study:
- To investigate and compare the release patterns of S-100beta, a biomarker for brain injury, in patients undergoing normothermic versus moderately hypothermic CPB.
- To assess early and late S-100beta release and neurological function after different CPB temperature strategies.
Main Methods:
- A randomized study involving 48 patients undergoing coronary artery bypass grafting.
- Patients were assigned to either normothermic (37°C) or moderately hypothermic (32°C) CPB.
- Serum S-100beta levels were monitored up to 24 hours post-CPB, with pre- and post-operative neurological examinations.
Main Results:
- No significant differences were observed between the normothermia and hypothermia groups in peak S-100beta levels or S-100beta levels at 24 hours post-CPB.
- Intraoperative blood glucose levels were the only exception, showing no group differences.
- Both groups exhibited similar patterns of S-100beta release and no apparent neurological complications.
Conclusions:
- The findings suggest that normothermic CPB does not lead to an increased risk of cerebral injury, as indicated by S-100beta release patterns.
- Normothermia during CPB appears to be a safe alternative to moderate hypothermia regarding cerebral injury markers.
- Further research may be warranted to fully elucidate the long-term neurological effects, but early indicators are reassuring.