ROBUST I Pilot Study
ROBUST I Pilot Study
Robust I study is a feasibility study for evaluating the safety and efficacy of DCB.
The study is designed to determine the safety and effectiveness for drug coated balloon
 (DCB).

 Up to 50 subjects is planned to be enrolled and treated with the study device at up to 5
 clinical sites outside of US. Due to significantly higher prevalence of strictures in men vs.
 women and the etiology of those strictures being different, the study will focus on male
 subjects with single anterior urethral stricture. Subjects will be followed up post-treatment
 to one year and then annually for up to 5 years. The annual follow up after the first year is
 optional.
Inclusion Criteria:

 1. Male subjects ≥ 18 years' old

 2. Visual confirmation of stricture via cystoscopy or urethrogram

 3. Single lesion anterior urethral stricture or bladder neck contracture, less than or
 equal to 2.0 cm

 4. One to three (1-3) prior diagnosis and treatment of the same stricture (including
 self-catheterization) including DVIU (Direct Vision Internal Urethrotomy), but no
 prior urethroplasty

 5. Significant symptoms of stricture such as frequency of urination, dysuria, urgency,
 hematuria, slow flow, feeling of incomplete emptying, recurrent UTI's.

 6. IPSS score of 13 or higher

 7. Lumen diameter <12F by urethrogram

 8. Able to complete validated questionnaire independently

 9. Qmax <10 ml/sec

 Exclusion Criteria:

 1. Strictures greater than 2.0 cm long.

 2. Subjects that have more than 1 stricture.

 3. Sensitivity to paclitaxel or on medication that may have negative interaction with
 paclitaxel

 4. Subjects who have a suprapubic catheter and are unable to complete study required
 testing, such as uroflowmetry

 5. Previous urethroplasty within the anterior urethra

 6. Stricture due to bacterial urethritis or untreated gonorrhea

 7. Stricture dilated or incised within the last 3 months

 8. Presence of local adverse factors, including abnormal prostate making catheterization
 difficult, urethral false passage or fistula.

 9. Presence of signs of obstructive voiding symptoms not directly attributable to the
 stricture such as BPH at the discretion of the clinical investigator

 10. Previous radical prostatectomy

 11. Previous pelvic radiation

 12. Diagnosed kidney, bladder, urethral or ureteral stones or active stone passage in the
 past 6 months.

 13. Diagnosed with chronic renal failure unless under hemodialysis or has a serum
 creatinine level greater than 2 mg/dL

 14. Use of alpha blockers, beta blockers, OAB (Overactive Bladder) medication,
 anticonvulsants (drugs that prevent or reduce the severity and frequency of seizures),
 and antispasmodics where the dose is not stable. (Stable dose is defined as having the
 same medication and dose in the last six months.)

 15. Use of Botox (onabotulinumtoxinA) in urinary system within the last 12 months