Optilume drug‐coated balloon for anterior urethral stricture: 2‐year results of the ROBUST III trial
Bibliographic record
Abstract
Abstract Objective The aim of this study is to report the updated 2‐year results of the intervention arm of the ROBUST III randomized trial evaluating the safety and efficacy of the Optilume drug‐coated balloon (DCB) versus standard endoscopic management of recurrent male anterior urethral stricture. Materials and Methods Eligible patients included men with recurrent anterior urethral stricture ≤3 cm in length and ≤12Fr in diameter, International Prostate Symptom Score (IPSS) ≥11 and peak flow rate (Qmax) <15 mL/s. Patients were randomized to treatment with the Optilume DCB or standard‐of‐care endoscopic management. Primary efficacy endpoints measured at 2 years included freedom from re‐intervention and changes in IPSS, Qmax and post‐void residual (PVR). Secondary endpoint was impact on sexual function using the International Index of Erectile Function (IIEF). Primary safety endpoint was freedom from serious procedure‐ or device‐related adverse events (AEs). Results A total of 127 patients enrolled at 22 sites in the United States and Canada (48 randomized to standard‐of‐care dilation and 79 to DCB dilation). Seventy‐five patients in the DCB arm entered the open‐label phase after 6 months. Participants averaged 3.2 prior endoscopic interventions (range 2–10); most (89.9%) had bulbar strictures with an average stricture length of 1.63 cm (SD 0.76). Significant improvements in IPSS, average Qmax and PVR were maintained at 2 years. Freedom from repeat intervention was significantly higher in the Optilume DCB arm at 2 years versus the Control arm at 1 year (77.8% vs. 23.6%, p < 0.001). During the follow‐up period, there were 15 treatment failures and two non‐study‐related deaths. Treatment‐related AEs were rare and generally self‐limited (haematuria, dysuria and urinary tract infection). Conclusion The Optilume DCB shows sustained improvement in both objective and subjective voiding parameters at 2‐year follow‐up. Optilume appears to provide a safe and effective endoscopic treatment alternative for short recurrent anterior urethral strictures among men who wish to avoid or delay formal urethroplasty.
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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 | 0.000 |
| 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".