Day Case Mini Percutaneous Nephrolithotomy (PCN): First UK Experience
Bibliographic record
Abstract
Background and Objective To investigate the safety, efficacy, and feasibility of performing mini PCN (MIP-M Karl Storz) as a day case procedure. We report our experience and outcomes from our case series which to our knowledge is the first reported in the UK. Material and Methods Ten patients appropriate for mini PCN and day-case surgery were selected prospectively. All 10 patients underwent a mini PCN procedure in a prone position. Access was achieved by the operating surgeon under fluoroscopic guidance in 9 cases and by a consultant uroradiologist under ultrasound guidance in 1 patient with a ureterosigmoidostomy using a Kellet needle and the MIP-M system (Karl Storz, Germany). Stones were fragmented with a 550um laser fibre and retrieved by both the Vortex effect and a grasper. Drainage was achieved with a 6 Fr antegrade stent in 9 cases and a 10 Fr nephrostomy tube in one patient. Stone related outcomes, duration of surgery, length of stay and complications were recorded. Results All cases were completed as planned. The mean operating time was 93 minutes. A day case rate of 80% was achieved. Two patients were admitted overnight for social reasons; one lived on a nearby island and was not ready for discharge in time to catch the last ferry and another no longer had a responsible adult at home to monitor him overnight. All patients were deemed radiologically stone free. No readmissions, transfusion, infections or other complications were recorded at 90 days postoperatively. Conclusion We have shown that day-case mini PCN is a feasible and safe procedure in selected patients. A larger number of cases are needed to establish our patient selection criteria and corroborate our early outcomes.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 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) | 0.001 | 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 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".