Management of Lower Extremity Ischaemia During Type A Dissection Repair
Bibliographic record
Abstract
INTRODUCTION: Type A aortic dissection can present with malperfusion syndrome. Lower limb ischaemia may resolve with repair of the dissection; however, the long duration of repair and/or persistent ischaemia may leave tissue at risk of necrosis with potential for substantial morbidity. REPORT: Here, the case of a 67 year old man who presented with a Type A aortic dissection with malperfusion of the lower extremities is described. The Vascular Surgery and Cardiac Surgery divisions were consulted simultaneously. A decision was made to perform bilateral superficial femoral artery cannulation with perfusion initially via the right axillary artery prior to sternotomy, then via the cardiopulmonary bypass circuit. At completion of the arch replacement, lower extremity inflow was reassessed with formal repair of the femoral arteries. Post-operatively, the patient had complete return of motor-sensory function, despite densely ischaemic symptoms at presentation several hours previously. DISCUSSION: Cannulation of the superficial femoral arteries serves as a means to limit limb ischaemia intra-operatively and potentially improve outcomes in the setting of Type A aortic dissection with lower extremity malperfusion.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| 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 source (direct Gemma or distilled Codex), 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".