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QEEG changes during cardiopulmonary bypass: relationship to postoperative neuropsychological function
L D Gugino1, R J Chabot, L S Aglio
1Department of Anesthesia, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
Clinical EEG (Electroencephalography)
|June 8, 1999
Summary
Intraoperative quantitative electroencephalography (QEEG) may predict postoperative cognitive dysfunction in cardiac surgery patients. Monitoring QEEG during surgery could help identify individuals at risk for long-term cognitive deficits after cardiopulmonary bypass.
Area of Science:
- Neuroscience
- Anesthesiology
- Cardiovascular Surgery
Background:
- Cardiac surgery with cardiopulmonary bypass (CPB) can lead to postoperative cognitive dysfunction (POCD).
- Predicting and mitigating POCD is crucial for patient outcomes.
Purpose of the Study:
- To investigate the relationship between intraoperative quantitative electroencephalography (QEEG) changes and postoperative cognitive function.
- To determine if QEEG can predict long-term cognitive deficits after cardiac surgery.
Main Methods:
- 32 patients undergoing cardiac surgery with CPB were monitored using continuous QEEG.
- Neuropsychological (NP) evaluations were performed preoperatively and at 1 week and 2-3 months postoperatively.
- Cognitive deficit was defined as a decline of 2 standard deviations in NP test performance.
Main Results:
- 40.6% of patients showed a new cognitive deficit at 1 week postoperatively.
- 28.1% of patients still exhibited cognitive deficits at 2-3 months.
- Intraoperative QEEG accurately predicted cognitive performance at 2-3 months postoperatively, with prediction accuracy above chance at 1 week.
Conclusions:
- Intraoperative QEEG monitoring shows promise in predicting long-term cognitive dysfunction after cardiac surgery.
- Implementing QEEG monitoring protocols may aid in identifying patients at risk for persistent cognitive deficits.
- Further research is warranted to refine QEEG-based prediction models for POCD.
