Safety and Efficacy Study for the Treatment of BPH (Enlarged Prostate) (REZUM)

This study is currently recruiting participants. (see Contacts and Locations)
Verified March 2014 by NxThera Inc
Information provided by (Responsible Party):
NxThera Inc Identifier:
First received: July 26, 2013
Last updated: March 31, 2014
Last verified: March 2014

To evaluate the safety and efficacy of the Rezūm System and assess its effect on urinary symptoms secondary to benign prostatic hyperplasia (BPH).

Condition Intervention
Benign Prostatic Hyperplasia
Lower Urinary Tract Symptom
Device: Rezum System
Procedure: Rigid Cystoscopy

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Crossover Assignment
Masking: Single Blind (Subject)
Primary Purpose: Treatment
Official Title: Minimally Invasive Prostatic Vapor Ablation - Multicenter, Controlled Study for the Treatment of BPH (Rezūm II)

Resource links provided by NLM:

Further study details as provided by NxThera Inc:

Primary Outcome Measures:
  • Efficacy: International Prostate Symptom Score (IPSS) [ Time Frame: 3 Month Follow-up Visit ] [ Designated as safety issue: No ]
    Comparison of the change in BPH symptoms as measured by IPSS change between the Treatment and Control arm at 3 months post-treatment. The IPSS is a well-validated, highly reliable and responsive American Urological Association symptom score (AUASS) assessment to identify the severity of BPH Symptoms. The first seven questions of the IPSS Questionnaire address frequency, nocturia, weak urinary stream, hesitancy, intermittence, incomplete emptying and urgency. The eighth question is designed to assess the degree of "bother" associated with the subject's urinary symptoms.

  • Safety: Device Related Serious Complications [ Time Frame: 3 Months ] [ Designated as safety issue: Yes ]

    This safety endpoint will be to demonstrate that the composite observed rate of post-procedure device related serious complications in the Treatment Arm are is less than or equal to 12% at 3 months.

    Composite device related serious complications for this endpoint are 1) De Novo (new) severe urinary retention lasting more than 21 consecutive days post treatment, 2) Device related formation of fistula between the rectum and urethra, and 3) device perforation of the rectum or GI tract.

Secondary Outcome Measures:
  • Percent Responders at 3 Months [ Time Frame: 3 Months ] [ Designated as safety issue: No ]
  • Percent Responders at 6 Months [ Time Frame: 6 Months ] [ Designated as safety issue: No ]
  • Percent Responders at 12 Months [ Time Frame: 12 Months ] [ Designated as safety issue: No ]

Estimated Enrollment: 195
Study Start Date: July 2013
Estimated Study Completion Date: June 2019
Estimated Primary Completion Date: December 2018 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Treatment
Treatment: Rezūm System
Device: Rezum System

The Rezūm System uses sterile water vapor (steam) to treat BPH by delivering targeted, controlled doses of stored thermal energy directly to the transition zone of the prostate gland.

A narrow sheath, similar in shape and size to a cystoscope, is inserted transurethrally and positioned within the prostatic urethra between the bladder neck and the verumontanum.

A thin needle is deployed through the urethra into the transition zone, and a very short (8-10 second) treatment of water vapor is delivered directly into the hyperplastic tissue and immediately disperses through the tissue interstices.

Upon contact with the tissue, the vapor condenses, or phase shifts, into its liquid state, releasing the stored thermal energy contained within the vapor. This thermal energy is released directly against the walls of the tissue cells within the treatment zone, gently and immediately denaturing the cell membranes, thereby causing instantaneous cell death.

Control: Rigid Cystoscopy
Procedure: Rigid Cystoscopy
Endoscopy of the urinary bladder via the urethra.
Other Name: Cystoscopy

Detailed Description:

This study is a prospective, controlled, randomized single blind clinical trial of subjects with benign prostatic hyperplasia, which will allow for an interim analysis for sample size adjustment. Subjects first will be randomized in a 2:1 proportion in favor of the Treatment arm. Subjects in the Control arm will be allowed to crossover to have the Rezūm treatment after the 3-month follow-up examination.


Ages Eligible for Study:   50 Years and older
Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Male subjects > 50 years of age who have symptomatic BPH.
  2. International Prostate Symptom Score (IPSS) score ≥ 13.
  3. Peak urinary flow rate (Qmax): ≥ 5ml/sec to ≤ 15 ml/sec with minimum voided volume of ≥ 125 ml.
  4. Post-void residual (PVR) ≤250 ml.
  5. Prostate volume > 30 and ≤ 80 gm.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01912339

Contact: Cindy B Ogden 763-515-2388
Contact: Andrea R Stone 763-515-0065

United States, Arizona
Arizona Institute of Urology Recruiting
Tucson, Arizona, United States, 85704
Contact: Sharon Snyder, RN    520-784-7019   
Principal Investigator: Jerry M Greenberg, MD         
Sub-Investigator: Kalpesh R. Patel, MD         
United States, Colorado
Urology Associates of Denver Recruiting
Denver, Colorado, United States, 80113
Contact: Keith Gryder-Childers    303-733-8848 ext 7   
Principal Investigator: Barrett Cowan, MD         
United States, Florida
South Florida Medical Research Recruiting
Aventura, Florida, United States, 33180
Contact: Sayonara Nunez    305-931-8080   
Principal Investigator: Marc Gittelman, MD         
United States, Illinois
Southern Illinois University Recruiting
Springfield, Illinois, United States, 62794
Contact: Kristal Adams    217-545-7812   
Principal Investigator: Kevin McVary, MD         
United States, Maryland
Chesapeake Urology Recruiting
Townson, Maryland, United States, 21204
Contact: Crystal Vaughan    443-471-5725   
Principal Investigator: Richard Levin, MD         
United States, Minnesota
Mayo Clinic Recruiting
Rochester, Minnesota, United States, 55905
Contact: Jane Smith, R.N.    507-266-8788   
Principal Investigator: Lance Mynderse, MD         
Metro Urology Recruiting
Woodbury, Minnesota, United States, 55125
Contact: Cindy Holtz    651-999-7033   
Principal Investigator: Randy Beahrs, MD         
United States, New York
Manhattan Medical Research Recruiting
New York, New York, United States, 10016
Contact: Carmela Graci-Pipitone   
Principal Investigator: Jed Kaminetsky, MD         
United States, Ohio
The Urology Group Recruiting
Cincinnati, Ohio, United States, 45212
Contact: William Corbet    513-841-7555   
Sub-Investigator: Michael Rousseau, MD         
Cleveland Clinic Recruiting
Cleveland, Ohio, United States, 44195
Contact: Cynthia Hayword   
Principal Investigator: James Ulchaker, MD         
United States, South Carolina
Carolina Urologic Research Center Recruiting
Myrtle Beach, South Carolina, United States, 29572
Contact: Jennifer Baiden    843-449-1010 ext 237   
Principal Investigator: Neal Shore, MD         
United States, Texas
Texas Urology Recruiting
Carrolton, Texas, United States, 75010
Contact: Simona Marin   
Principal Investigator: Kenneth Goldberg, MD         
UT Southwestern Recruiting
Dallas, Texas, United States, 75390
Contact: Allison Beaver    214-645-8787   
Principal Investigator: Claus Roehrborn, MD         
Urology of San Antonio Recruiting
San Antonio, Texas, United States, 78229
Contact: Jose Perez    210-617-4116   
Principal Investigator: Christopher Cantrill, MD         
United States, Utah
Jean Brown Research Recruiting
Salt Lake City, Utah, United States, 84124
Contact: Susan Griffiths   
Contact    (801) 261-2000 ext 324      
Principal Investigator: Steven Gange, MD         
Sponsors and Collaborators
NxThera Inc
Principal Investigator: Claus Roehrborn, MD UT Southwestern
Principal Investigator: Kevin McVary, MD Southern Illinois University
  More Information

No publications provided

Responsible Party: NxThera Inc Identifier: NCT01912339     History of Changes
Other Study ID Numbers: 2105-001
Study First Received: July 26, 2013
Last Updated: March 31, 2014
Health Authority: United States: Food and Drug Administration

Keywords provided by NxThera Inc:

Additional relevant MeSH terms:
Prostatic Hyperplasia
Prostatic Diseases
Genital Diseases, Male
Pathologic Processes processed this record on July 29, 2014