Injury to the Distal Motor Branch of the Ulnar Nerve From Thumb K-Wire Fixation
Bibliographic record
Abstract
We present a complication of trapeziectomy with hematoma distraction arthroplasty for thumb carpometacarpal joint arthritis in a 61-year-old female. Shortly after Kirschner (K)-wire removal at 5.5 weeks post-operatively, the patient noted weakness with thumb adduction. Electromyography and nerve conduction studies done at 3, 5, and 14 months post-operatively showed acute axonal ulnar neuropathy affecting the deep, distal motor branch of the left hand with subsequent partial recovery of function. We postulate that insertion of 1 of the 2 K-wires resulted in a third-degree transection injury to the deep motor branch of the ulnar nerve. To our knowledge, this complication has not been previously reported. We believe it is important for surgeons performing this procedure to be aware of this potential complication as it results in a significant functional disability for the patient.
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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 | 0.003 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.005 | 0.003 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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".