CASE REPORT: A UNIQUE CASE OF BRAINSTEM ANESTHESIA AND CONTRALATERAL AMAUROSIS AFTER A SUBTENON BLOCK
Bibliographic record
Abstract
PURPOSE: To report and discuss a case of brainstem anesthesia and contralateral amaurosis after a sub-Tenon block. METHODS: Single surgical case report of a patient who underwent an uncomplicated pars plana vitrectomy for an epiretinal membrane peel in the left eye after a sub-Tenon anesthesia technique. RESULTS: Postoperatively, the patient experienced symptoms of brainstem anesthesia as well as akinesia, a nonreactive pupil, and reduced visual acuity in the contralateral eye that gradually resolved within 24 hours. Imaging was within normal limits and did not reveal any anatomic abnormalities. CONCLUSION: Despite the use of a blunt-ended cannula in a sub-Tenon block, there is a non-negligible risk of it penetrating surrounding structures such as the optic nerve sheath. This case emphasizes the importance of monitoring for brainstem anesthesia and contralateral eye involvement in patients both intra- and postoperatively.
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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 | 0.004 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.002 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.003 | 0.002 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.001 | 0.003 |
| Research integrity | 0.006 | 0.004 |
| Insufficient payload (model declined to judge) | 0.004 | 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".