Direct Full-stage Implantation of Sacral Neuromodulation


The purpose of this investigator-initiated study is to investigate the efficacy and costs of direct full stage sacral neuromodulation in patients with overactive bladder. Patients with refractory OAB and urge urinary incontinence will undergo direct full stage implantation and be followed for a period of 6 months to monitor symptom improvement with voiding diaries and validated questionnaires preoperatively and postoperatively. Therapeutic and adverse outcomes will be evaluated. The use of medical resources and time off of work will be analyzed as well. This will be a descriptive study with no additional arms or randomization.

Study Type

  • Study Type: Observational
  • Study Design
    • Time Perspective: Prospective
  • Study Primary Completion Date: December 2022


  • Device: full stage implantation of sacral neuromodulation
    • full stage implantation of sacral neuromodulation for overactive bladder and urge incontinence

Arms, Groups and Cohorts

  • overactive bladder patients
    • Female patients with refractory overactive bladder and urge urinary incontinence undergoing direct full stage implantation

Clinical Trial Outcome Measures

Primary Measures

  • Improvement in overactive bladder symptoms
    • Time Frame: 1 year
    • measured using overactive bladder questionnaire

Participating in This Clinical Trial

Inclusion Criteria

  • Patients >18 years of age – Female gender – Refractory overactive bladder: wet failing treatment with two or more anticholinergic and/or beta-3 agonist agents – Willing to stop treatment with anticholingeric and/or beta-3 agonist agents during the study period (2 week washout period preoperatively and 6 months postoperative) – Willing and able to complete study questionnaires, use Medtronic device programmer, return for scheduled follow-up appointments – Surgical candidate able to hold antiplatelet or anticoagulation prior to surgery – Health insurance provider that will cover full-stage implantation Exclusion Criteria:
  • Age <18 – Pregnant or planning to become pregnant – Male gender – Unable or unwilling to stop anticholingeric and/or beta-3 agonist agents during the study period – Treatment with botulinum toxin within last 6 months – Recent surgery for stress urinary incontinence or pelvic organ prolapse within last 6 months – Severe pelvic organ prolapse – Post-void residual >150 ml – Symptomatic or recurrent urinary tract infection – Neurologic disorders: cerebrovascular accident with neurologic deficits, Parkinson's, multiple sclerosis, spinal cord injury, significant peripheral neuropathy – Cognitive disorders, e.g. dementia – Interstitial cystitis or chronic pelvic pain syndrome – Poorly controlled diabetes mellitus (HbA1c >10%) – History of bladder malignancy, pelvic radiation, urinary retention requiring catheterization – Anticipated or known need for MRI at the trunk – History of or anticipated surgery at the lower back – Unable to hold antiplatelet or anticoagulation prior to surgery – Life expectancy <1 year
  • Gender Eligibility: Female


    Minimum Age: 18 Years

    Maximum Age: 100 Years

    Are Healthy Volunteers Accepted: No

    Investigator Details

    • Lead Sponsor
      • Loma Linda University
    • Provider of Information About this Clinical Study
      • Principal Investigator: Andrea Staack, MD PhD – Loma Linda University


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    Ganz ML, Smalarz AM, Krupski TL, Anger JT, Hu JC, Wittrup-Jensen KU, Pashos CL. Economic costs of overactive bladder in the United States. Urology. 2010 Mar;75(3):526-32, 532.e1-18. doi: 10.1016/j.urology.2009.06.096. Epub 2009 Dec 29.

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