Bispectral Index as an Indicator of Cerebral Hypoperfusion During Off-Pump Coronary Artery Bypass Grafting
Bibliographic record
Abstract
In Brief Bradycardia and hypotension are common during off-pump coronary artery bypass grafting (OPCAB). We present a case of possible reversible global cerebral hypoperfusion during distal grafting of the left circumflex coronary artery. The bispectral index (BIS) suddenly decreased from values of 45–50 to 0 during distal grafting. Neurologic evaluation after immediate tracheal extubation in the operating room was normal and the 58 yr old patient did not suffer any neurologic sequelae. Postoperative recovery was uneventful and the patient was discharged 5 days after surgery. Cerebral hypoperfusion is a possible complication during OPCAB. BIS monitoring in OPCAB could be an indicator of cerebral hypoperfusion. IMPLICATIONS: We present a case of possible cerebral hypoperfusion during beating heart surgery as shown by processed electroencephalographic monitoring of the bispectral index.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".