Relationship Between Hypovascular Zones and Patterns of Ruptures of the Quadriceps Tendon
Why this work is in the frame
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Bibliographic record
Abstract
BACKGROUND: Compromised vascularity and hypoxia have been proposed as risks for tendon ruptures. The density of vascularity of the quadriceps tendon may explain the pattern of ruptures of this muscle-tendon unit. METHODS: Twenty adult human cadavers underwent whole-body arterial perfusion with a mixture of lead oxide, gelatin, and water through the femoral artery. Thirty-three quadriceps tendons were dissected and radiographed, and each angiogram was analyzed with use of image statistical software. RESULTS: We consistently identified a hypovascular zone located between 1 and 2 cm from the superior pole of the patella. This finding correlates with the location of spontaneous ruptures of the quadriceps tendon reported in the literature. These findings indicate that the vascular supply of the quadriceps tendon is separated into three arcades, or arches, which are medial, lateral, and peripatellar. CONCLUSIONS: Hypovascularity may determine the site of spontaneous ruptures of the quadriceps tendon. CLINICAL RELEVANCE: Understanding the vascular zones of the quadriceps tendon may facilitate the use of nonoperative as well as operative treatments to increase the vascularity of the tendon. An understanding of the vascular arcades may facilitate and enhance healing following reparative and reconstructive surgery on the tendon.
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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) | 0.001 | 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) | 0.000 | 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