Difficulty removing a ureteric stent due to a knotted proximal end
Bibliographic record
Abstract
We present a case of a 55-year-old male who presented three days after laser lithotripsy and insertion of a 6 CH multilength JJ stent. Symptoms included abdominal pain and visible haematuria. Investigations included a CT scan showing the stent to be in a satisfactory position with no encrustation. Unexpected difficulty was encountered on cystoscopic removal as the stent would not come out entirely. Abdominal X-ray showed the proximal end of the stent to be knotted and stuck at the vesicoureteric junction. He was transferred to the operating theatre, and the stent was successfully removed with continuous traction under a general anaesthetic. Post-removal cystoscopy and retrograde pyelogram showed an intact urinary tract with inflammation at the left ureteric orifice. Knotting of ureteric stents is a rare complication but has been reported previously in the literature. The exact aetiology is not known; however, it has previously been attributed to excessive length of stent within the renal pelvis. Several methods of removing a knotted stent have been reported, including traction, ureteroscopic untying, laser destruction of the stent, retrograde removal, and open surgery. Choice of technique will vary depending on anatomical location of the knot.
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How this classification was reachedexpand
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) | 0.000 | 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 | 0.001 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".