Letters to the Editor: Hypothermia for spinal cord injury
Bibliographic record
Abstract
The authors describe the long-term clinical outcome in 20 patients who had American Spinal Injury Association Impairment Scale (AIS) Grade A SCI in either the cervical spine (n = 14) or thoracic spine (n = 6).This report includes the 10 patients described by the author in a previous report in 1984. 12The patients were accrued for 10 years starting from 1977 with a mean follow-up of around 5 years.Dexamethasone was given to patients for 18 days.A local cooling apparatus placed in the epidural space cooled the dura to 6°C for up to 4 hours while the instrumentation was being done after decompression.Overall, 65% of the patients improved from AIS Grade A to B, C, or D, with 2 patients regaining ambulatory function.The outcomes reported in this study are better than what would usually be expected for an AIS Grade A injury. 7 Local spinal cord cooling was more popular in 1970s and early 1980s when several groups had used local cooling in humans and animals with variable but generally good results. 3,4,8,10,11,16,18,20,21 The potential benefits of providing hypothermia directly to the injured region obviated many of the risks of deep systemic hypothermia and resulted in many studies in large animals, leading to application in humans.Local cooling trials for SCI in humans in that era were facilitated by the common performance of laminectomy as part of the treatment regimen.Wide laminectomy particularly after cervical injuries is now much less common, particularly with the advent of anterior cervical plating for cervical fracture-dislocations. 19 While the outcomes of some of these studies were encouraging, several factors, like the lack of control group, variable treatment window, confounding variables such as the administration of steroids, and small sample size led to failure in drawing any strong conclusions and gradual abandonment of local hypothermia for SCI.In contrast, there is very encouraging data from our center that modest systemic hypothermia (32°-34°C) can lead to both histological and functional recovery after SCI in animal models. 2,14,15,17,22 We have reported our technique and clinical data on the outcome and safety profile of modest systemic hypothermia for 48 hours after cervical AIS Grade A SCI. 1,5,6,13,15 In our initial study, 6 of
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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 | 0.002 | 0.016 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.003 | 0.003 |
| Open science | 0.003 | 0.001 |
| Research integrity | 0.011 | 0.010 |
| Insufficient payload (model declined to judge) | 0.006 | 0.005 |
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".