ROBUST III is a prospective, multi-center, randomized controlled adaptive sample size clinical trial to establish the safety and effectiveness for the Optilume Stricture Drug Coated Balloon (DCB).
ROBUST III is a prospective, multi-center, single blind randomized controlled clinical trial in a 2:1 allocation of treatment versus control device. This study is an adaptive design with an interim analysis for sample size re-estimation performed after 60 subjects have been enrolled. The interim analysis will be be undertaken following completion of the 6-month follow-up data from these subjects. Based on the results of the interim analysis, the final total sample size required for the study will be re-estimated. A minimum of 140 subjects, and a maximum of 200 subjects (pending the re-estimation) will be enrolled in the study. A Data Monitoring Committee (DMC) will review the interim analysis results, including the sample size re-estimation and make recommendations related to trial continuation to the sponsor.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
127
The Optilume Drug Coated Balloon (DCB) is a guidewire compatible catheter with a tapered atraumatic tip. The distal end of the catheter has an inflatable balloon coated with a proprietary coating containing the drug paclitaxel that facilitates the drug's transfer to the urethral wall upon inflation.
A control subject may be dilated with either a rod, uncoated balloon or DVIU until the desired result is reached, based on standard of care for the clinical site and treating physician
Academic Urology and Urogynecology of Arizona
Phoenix, Arizona, United States
Percentage of Subjects Stricture Free
The percentage of subjects deemed to be stricture free will be compared between arms. Stricture free subjects are those for which a 16F flexible cystoscope or 14F Foley catheter is able to be passed through the treated stricture without significant resistance.
Time frame: 6 months
Safety: Rate of Major Device or Procedure Related Complications
Rate of Major Device or Procedure Related complications
Time frame: 3 months
Change in Qmax (Peak Flow Rate)
Change in peak urinary flow rate (Qmax) from baseline to 6 months post treatment. Positive values indicate an increase in Qmax from baseline to 6 months, while negative values indicate a decrease in Qmax.
Time frame: 6 months
IPSS Percent Responder (50% Improvement in IPSS Score)
The proportion of subjects considered to be therapeutic responders, defined as an improvement of greater than or equal to 50% in the International Prostate Symptom Score \[IPSS\] without repeat intervention, in the Optilume DCB arm at 12 months will be compared to a performance goal of 50%. The IPSS was developed to measure symptom severity for bladder outlet obstruction, with a range of 0 (no symptoms) to 35 (worst possible symptoms).
Time frame: 12 months
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