Utilizing optical coherence tomography to explore pulmonary arteries and pulmonary vascular disease in Fontan patients
Bibliographic record
Abstract
Background: The Fontan procedure is the palliative intervention of choice for patients with single ventricle physiology. Pulmonary vascular disease (PVD) is a major contributor to Fontan circulatory failure. Our study utilized optical coherence tomography (OCT) imagery in pulmonary arteries to better characterize PVD in Fontan patients. Methods: In a prospective pilot study, OCT images were acquired during cardiac catheterization in a distal left pulmonary artery (PA) branch (A10). The PA intima-media ratio and wall-vessel ratio (i.e., difference between the external elastic membrane area and the luminal area divided by the external elastic membrane area) were measured off-line. Results: A total of 9 Fontan patients (5 women), median age of 23.0 (21.0,38.0) years, were included. All patients exhibited an intima-to-media ratio above 1.0. The ratio exceeded 2.8 in patients with high pulmonary vascular resistance. No difference is observed between patients for the wall-vessel ratio. No relation between time of completion of Fontan and intima-media ratio is identified. Conclusion: OCT shows promise in evaluating PVD in patients with Fontan palliation. PA remodeling is characterized by intimal hyperplasia with medial regression. Further studies are required to determine the role of OCT in guiding treatment decisions and assessing therapeutic responses.
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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) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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 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".