Complications of Cerebrospinal Fluid Shunt Antisiphon Devices
Bibliographic record
Abstract
The case histories of 38 children with implanted antisiphon devices (ASD) were retrospectively reviewed. Sixty-three percent suffered a shunt malfunction within 5 years of ASD implantation. The probability of shunt malfunction within 1 year was of 40%. Patients with myelomeningocele experienced the highest rate of malfunction. Age, order of ASD implantation (whether implanted primarily or secondarily), shunt pressure, and reason for ASD insertion did not significantly alter the incidence of malfunction. Fifty percent of the shunt complications were specifically related to ASD malfunction. Functional obstruction of the shunt system as determined by evidence of clinical shunt obstruction with documented patency on shunt flow testing occurred in 10 of 38 patients. No variable studied could be significantly related to the probability of developing an ASD-related complication. Functional obstruction of the ASD is a common and unpredictable complication of these devices.
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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 | 0.006 |
| Meta-epidemiology (narrow) | 0.000 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| 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".