Using mathematical and computational modeling to study dynamic regulation of tissue oxygen delivery
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
To investigate how regulation of the convective O 2 supply is related to actual tissue oxygenation, a multi‐pronged approach is being used that involves in vivo microvascular experiments, simplified one‐dimensional (1D) mathematical models, and full 3D numerical simulations. Experimental data is obtained using a gas exchange chamber in the stage of an inverted microscope to alter the O 2 environment at the surface of a rat skeletal muscle. The microvascular response to sine oscillations in chamber O 2 (60 and 120 second periods) is determined by measuring capillary hemodynamics (RBC velocity and hematocrit) and RBC O 2 saturation levels with a functional microvascular imaging system. Oscillations in chamber O 2 can cause oscillations in capillary hemodynamics, or there may be no clear hemodynamic response (‘non‐responders’). For non‐responders, 1D and 3D modeling of the experimental situation have shown that O 2 consumption and capillary‐tissue transport alter tissue O 2 dynamics relative to the classic pure‐diffusion case. This result agrees with available data and has implications for the possible role of O 2 dynamics in flow regulation. Work is now focusing on incorporating observed hemodynamic responses into the O 2 transport models to determine how microvessels of different types (e.g., capillaries vs. arterioles) are involved in flow regulation and what the net result is in terms of tissue oxygenation.
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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