Safety and Efficacy of PVDF (DynaMesh®-SIS Soft) Retropubic Midurethral Slings in Stress Urinary Incontinence in Women

Study Overview
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Brief Summary
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This study is designed to evaluate the safety and efficacy of low elasticity polyvinylidene fluoride (DynaMesh®-SIS soft) retropubic tension-free midurethral slings in the treatment of stress urinary incontinence in women. Women who are having a retropubic PVDF midurethral sling for urodynamic stress incontinence will be followed up for 24 months to address its efficacy and rate of complications.

Detailed Description
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This study is designed to evaluate the safety and efficacy of low elasticity polyvinylidene fluoride (DynaMesh®-SIS soft) retropubic tension-free midurethral slings in the treatment of stress urinary incontinence (SUI) in women. Stress urinary incontinence is a common problem, affecting large numbers of women. If conservative measures are ineffective then surgery is offered. Surgery involves a permanent mesh sling being placed, tension free beneath the midurethra. The standard retropubic tension-free vaginal tape (TVT) has been used since 1996 using a polypropylene mesh.(1) The use of permanent mesh in gynaecology has come under scrutiny due to significant complications for women.(2) This year the Medicines and Healthcare Products Regulatory Agency (MHRA), UK concluded that there is not enough evidence to withdraw mesh from clinical usage.(3) The sling being studied is DynaMesh®SIS soft, made of polyvinylidene fluoride (PVDF) which has improved biocompatibility with tissues, meaning reduced scar formation and less mesh shrinkage.(4) Each sling is individually woven and and has low elasticity meaning dimensions are maintained under tension, such as with coughing or straining. The technique of retropubic placement of the DynaMesh®SIS soft does not differ from current retropubic TVT placement. The hypothesis is that the low elasticity polyvinylidene fluoride midurethral sling is non-inferior in both safety and efficacy compared with the safety and efficacy of traditional polypropylene slings, as reported in current literature. There are eleven research centres in two countries, The United Kingdom and Ireland. The DynaMesh®SIS soft sling is currently in use in four of eleven of the research hospitals, Norwich (main research centre), Antrim and Belfast in the UK and in Munich in Germany. It will be introduced in London, Cambridge, Wirral, Solihull, Huntingdon and Kilmarnock in the UK and Wurzbug in Germany. Women with urodynamic stress incontinence who are already assigned to have this retropubic midurethral tape placed for treatment will be recruited prior to their procedure for ongoing follow up. Participants will complete standardised urinary incontinence and quality of life questionnaires prior to their procedure and at 3,6,12, 18 and 24 months by post. Clinical follow up will occur at 3 and 12 months post operatively and as required if any concerns.

Official Title
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Safety and Efficacy of Low-elasticity Polyvinylidene Fluoride (DynaMesh®-SIS Soft) Retropubic Tension Free Midurethral Sling in the Treatment of Stress Urinary Incontinence in Women

Conditions
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Urinary Stress Incontinence, Urinary Incontinence,Stress

Intervention / Treatment
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* Other: 24 month follow up of women with validated questionnaire


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: women with proven urodynamic stress incontinence in whom a retropubic midurethral sling is appropriate treatment as per the treating urogynaecologist, gynaecologist or urologist women who have not had a previous incontinence procedure no concomitant prolapse procedure at the time of sling placement Exclusion Criteria: urodynamic studies negative for stress urinary incontinence previous incontinence procedures non English/non German speaker depending on study centre lack capacity to consent

Ages Eligible for Study
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Minimum Age: 20 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| PVDF retropubic midurethral sling<br>Women with urodynamic stress urinary incontinence having a retropubic polyvinylidene fluoride midurethral sling (DynaMesh®-SIS soft). | Other: 24 month follow up of women with validated questionnaire<br>* 24 month follow up (clinical and questionnaire based) of women who are already assigned to have a PVDF retropubic midurethral sling (DynaMesh®-SIS soft) as a part of their planned treatment of urodynamic stress incontinence.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The subjective cure rate of retropubic midurethral PVDF slings in treating stress urinary incontinence. |  | 3 to 24 months | 
| The rate of complications of retropubic midurethral PVDF slings, in particular mesh erosions. |  | 3 to 24 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Changes in quality of life, with regards to urinary symptoms, following placement of a retropubic midurethral PVDF sling. |  | 3 to 24 months | 
| The subjective cure rate of retropubic midurethral PVDF slings in treating stress urinary incontinence compared to the reported cure rate for traditional polypropylene retropubic slings. |  | 3 to 24 months | 
| The rate of complications of retropubic midurethral PVDF slings, in particular vaginal erosions and how the rates of complications compare to those reported in the literature for traditional polypropylene retropubic slings. |  | 3-24 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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retropubic, midurethral sling, polyvinylidene fluoride