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Changes in Abdominal Leak Point Pressures in Women Stress Urinary Incontinence Following Intravesical Gas (CO2 or Air) Instillation During Urodynamic Study

This study is not yet open for participant recruitment. (see Contacts and Locations)
Verified April 2014 by Meir Medical Center
The Trendlines Group
Information provided by (Responsible Party):
Meir Medical Center Identifier:
First received: March 28, 2014
Last updated: April 10, 2014
Last verified: April 2014

More than 11 million women in the United States suffer from stress urinary incontinence (SUI), the involuntary leakage of urine during everyday activities that put temporary stress on the abdomen and bladder, such as laughing, coughing, and walking. For women with SUI, this pressure often causes urine to leak involuntarily. SUI affects women of all ages including young mothers, pre-menopausal women, and seniors, and can result in significant emotional distress. Current solutions for SUI include disposable pads, behavioral treatment (pelvic floor physical therapy) and surgical intervention. Patients with SUI who failed conservative treatment and wish to be further treated by a surgery may require further work-up by urodynamic study in which abdominal leak point pressures (ALPP) defined and reflect the severity of SUI.

There is continuous need to develop less invasive treatments for SUI that could minimize the use of pads, could be an alternative to painful, costly surgical procedure. The Trendlines Group lab solution is a non-surgical alternative in the treatment of SUI. The concept of the future treatment solution is based on simple physics: injecting a small amount of gas (CO2 or air) into the urinary bladder, which eliminates or greatly reduces involuntary urinary leakage. The gas bubble acts as a "shock absorber" to reduce the temporary pressure increase in the bladder that causes urinary leakage. The concept for the new treatment has been tested in a lab environment using lab jig tests and pig urinary system (bladder and urethra). The lab tests showed significant improvement in the bladder pressure when the treatment was implemented by suspending the stress pressure to a level that will not cause urine leakage.

Condition Intervention Phase
Stress Urinary Incontinence
Other: gas (CO2 or air) instillation into the bladder
Phase 1
Phase 2

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Changes in Abdominal Leak Point Pressures in Women Stress Urinary Incontinence Following Intravesical Gas (CO2 or Air) Instillation During Urodynamic Study

Resource links provided by NLM:

Further study details as provided by Meir Medical Center:

Primary Outcome Measures:
  • change in abdominal leak point pressure [ Time Frame: 1 day ] [ Designated as safety issue: No ]
    to verify the concept of a possible future treatment in the clinical setup by checking physical effect of dumping pressure (decrease in ALLP) by inserting 30 or 50 ml of gas (air or CO2) into the bladder during the urodynamic study in patients with SUI.

Secondary Outcome Measures:
  • adverse events as a measure of safety and tolerability [ Time Frame: 1 week ] [ Designated as safety issue: Yes ]

Estimated Enrollment: 6
Study Start Date: April 2014
Estimated Primary Completion Date: December 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: SUI 1 Other: gas (CO2 or air) instillation into the bladder


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Female
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Women
  2. Age >18 years old
  3. SUI: pure or stress predominant mixed urinary incontinence.
  4. Failure of conservative treatment who desires surgical procedure for SUI.
  5. Signed informed consent for the trial and urodynamic study.
  6. Negative urine culture.

Exclusion Criteria:

  1. Neurogenic SUI
  2. Unable or unwilling to sign informed consent for the trial and urodynamic study.
  3. Patient who does not will a surgery for SUI
  4. Prior pelvic or lower abdominal malignancies
  5. Prior pelvic radiation or surgery except anterior/posterior colporrhaphy or hysterectomy (with or without oophorectomy) for benign disease.
  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: NCT02113670

Contact: Michael Vainrib, M.D. 972584705941

Meir Medical Center Not yet recruiting
Kfar Saba, Israel, 44410
Contact: Michael Vainrib, M.D.    972584705941   
Principal Investigator: Michael Vainrib, M.D.         
Sponsors and Collaborators
Meir Medical Center
The Trendlines Group
  More Information

No publications provided

Responsible Party: Meir Medical Center Identifier: NCT02113670     History of Changes
Other Study ID Numbers: TrendLinesSUI
Study First Received: March 28, 2014
Last Updated: April 10, 2014
Health Authority: Israel: Ministry of Health

Keywords provided by Meir Medical Center:
stress urinary incontinence
abdominal leak point pressure
urodynamic study

Additional relevant MeSH terms:
Urinary Incontinence
Urinary Incontinence, Stress
Lower Urinary Tract Symptoms
Signs and Symptoms
Urination Disorders
Urologic Diseases
Urological Manifestations processed this record on November 20, 2014