Cardiac Bypass Pump Flow Management via NIRS Monitoring
Why this work is in the frame
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Bibliographic record
Abstract
During cardiac surgery, bypass pumps rely on pressure monitors to evaluate flow. We studied whether it would be possible to optimize pump flow by monitoring changes in cerebral cytochrome a , a 3 using NIRS to maintain cyt redox status at its pre‐bypass level. Method : 18 healthy 7–45 kg swine were placed on bypass for repeated cycles of cooling and re‐warming from 36 to 15 to 36 ° C in 3 ° C steps. Between each cycle, the swine′s bypass pump blood flow rate was adjusted to restore cytochrome redox status to its pre‐bypass value. Results : In all swine trials, the number of pump flow alterations imposed by NIRS monitoring ranged from 0 to 42, the average being 14 per trial. The best trial had 22 pump flow adjustments during which the range of cytochrome redox status change was 0.50±0.06 μ mol l –1 . The average trial had a range of cytochrome redox status change of 1.50±0.22 μ mol l –1 . Conclusion : NIRS‐driven alterations in pump flow rate to maintain pre‐bypass cytochrome redox status can be achieved successfully in the animal model.
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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) | 0.000 | 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) | 0.000 | 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 it