We're building a better ClinicalTrials.gov. Check it out and tell us what you think!
ClinicalTrials.gov Menu

AURA-2: Augmenting Urinary Reflex Activity (AURA-2)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT05241379
Recruitment Status : Recruiting
First Posted : February 15, 2022
Last Update Posted : December 6, 2022
Information provided by (Responsible Party):
Amber Therapeutics Ltd

Brief Summary:
AMBER AURA-2 study (Augmenting Urinary Reflex Activity 2) is a short-duration (6 month) safety and electrophysiological study using an implanted Amber UI system and two electrode leads to provide closed-loop pudendal nerve stimulation for the treatment of urinary incontinence.

Condition or disease Intervention/treatment Phase
Overactive Bladder Urge Incontinence Device: Amber UI System Not Applicable

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 15 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Exploratory Safety and Electrophysiological Study of Closed-loop Pudendal Neuromodulation Using an Implantable (Picostim-DyNeuMo) Device in Women With Urinary Incontinence
Actual Study Start Date : November 30, 2022
Estimated Primary Completion Date : August 1, 2023
Estimated Study Completion Date : December 1, 2023

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: Amber UI Therapy
Participants will undergo surgical implantation of the Amber UI System incorporating 2 electrode leads connected to a single IPG
Device: Amber UI System
The implantable components of the Amber UI system consist of an implantable pulse generator (Picostim Amber IPG), 2 electrode leads with anchoring system

Primary Outcome Measures :
  1. Adverse Device Events [ Time Frame: 24 hours; 1 week; 4 weeks; 3 months; 6 months ]
    Incidence of adverse events as defined by REGULATION (EU) 2017/745(MDR) and MDCG 2020-10/1

Secondary Outcome Measures :
  1. Changes in Voiding diary data [ Time Frame: Baseline, 28 days, 3 months, 6 months ]
    Changes in 5 days voiding diary data including number of incontinence episodes, number of voids, number of urgency episodes

  2. Changes in ICIQ -UI Short Form [ Time Frame: Baseline, 28 days, 3 months, 6 months ]
    ICIQ-SF-UI questionnaire: is a questionnaire for evaluating frequency, severity and impact on quality of life of urinary incontinence in research and clinical practice. It is a 4 item simple questionnaire

  3. Changes in ICIQ-OAB Quality of Life [ Time Frame: Baseline, 28 days, 3 months, 6 months ]
    ICIQ-OAB Qol questionnaire: is a robust, subject-completed questionnaire for evaluating quality of life (QoL) in subjects with overactive bladder, for use in research and clinical practice. The questionnaire explores in detail the impact on subject's lives of overactive bladder and can be used as an outcome measure to assess impact of different

  4. Changes in PGI-I [ Time Frame: Baseline, 28 days, 3 months, 6 months ]
    Patient Global Impression of Improvement (PGI-I): The PGI-I is a subject-completed transition scale that is a single question asking the subject to rate their urinary tract condition now, as compared with how it was prior to before beginning treatment on a 7 point scale

  5. Changes in FSFI [ Time Frame: Baseline, 28 days, 3 months, 6 months ]
    FSFI - questionnaire: The Female Sexual Function Index (FSFI) is a widely used multidimensional self-reported questionnaire on Female Sexual Dysfunction. It consists of 19 items and assesses 6 domains, including desire, arousal, lubrication, orgasm, satisfaction and pain.

  6. Technical Outcomes [ Time Frame: 24 hours postoperatively ]
    Number of patients successfully implanted

  7. Measurement of EMG [ Time Frame: During procedure, 24 hours and 6 months ]
    Intra-operative and post-operative (ambulatory) measurements of electromyography

Information from the National Library of Medicine

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, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years to 75 Years   (Adult, Older Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Female patients aged ≥ 18 years
  • Diagnosis of urinary incontinence, with on a 5-day voiding diary at least 1 daily urgency episode and/or greater than or equal to 8 voids/day and/or by having a minimum of two involuntary leaking episodes in 72 hr
  • Duration of urinary incontinence symptom ≥ 6 months prior to the screening baseline visit date
  • Failed or is not a candidate for more conservative treatment e.g. pelvic floor muscle therapy or biofeedback or behavioral modification
  • Failed or could not tolerate at least one (1) antimuscarinic or beta3-adrenoceptor agonist medication
  • Urodynamic testing (uroflowmetry, cystometry and pressure flow) completed within 12 months prior to screening baseline visit date or is willing to have testing at screening baseline visit
  • Cystoscopy test completed within 12 months prior to the screening baseline visit date or is willing to have a test at screening baseline visit
  • Is willing and able to washout from OAB medications for at least 4 week prior to beginning the baseline voiding diary
  • Ability and willingness to give informed consent including language constraints (see above)
  • Able to participate in all testing and follow-up clinic visits associated with study protocol
  • Capable of independently using the system components (after training) as described in the Patient Manual
  • Mobile and able to use toilet without assistance

Exclusion Criteria:


  • Patient is pregnant, breastfeeding, or plans to become pregnant during the course of the study (pregnancy tests provided in schedule)
  • Patient is unwilling or unable to use contraception during sexual intercourse for the duration of the study, and thereafter if implant remains in the longer term.
  • Any significant medical condition that is likely to interfere with study procedures, device operation, or likely to confound evaluation of study endpoints
  • Any psychiatric or personality disorder at the discretion of the study physician
  • Any neurological condition that may interfere with normal bladder function (e.g., stroke, multiple sclerosis, Parkinson's disease; clinically significant peripheral neuropathy, or complete spinal cord injury)
  • Patient has uncontrolled type I or type II diabetes as defined by their routine care clinician or diabetes with peripheral nerve involvement
  • Any history of any pelvic cancer
  • Patient has history of other non-pelvic neoplasia within 5 years prior to enrolment, except for a cancer that was determined to be local occurrence only, such as basal cell carcinoma, or is receiving or planning to receive anti-cancer or anti-angiogenic drugs
  • Patient has proven major autoimmune disease, e.g. scleroderma or immunodeficiency (including use of biologic immunomodulatory drugs at time of procedure)
  • Life expectancy of less than 1 year
  • Patient is a frail elderly and/or with notable clinical evidence of sarcopaenia
  • Patient is not suitable for the study as determined by their routine care physician for any other reason
  • Patient is enrolled in another interventional study excepting observational studies, e.g. SNM registries or in relation to disease (see below)
  • Patient participation in vigorous sporting activities where these cannot be restricted for a period of 6 weeks post-implantation.

Specific urological

  • Urinary tract mechanical obstruction such as urethral stricture
  • Current symptomatic urinary tract infection (UTI) or more than 3 UTIs in past year
  • Pure stress incontinence or mixed incontinence where the stress component overrides the urge component
  • Interstitial cystitis or bladder pain syndrome as defined by either AUA or EAU guidelines
  • Suspected pudendal nerve entrapment syndrome. In patients with co-existent symptoms of chronic pelvic pain and urinary incontinence, Nantes criteria will be used for screening. Patients meeting essential criteria will be excluded from the study
  • Treatment of urinary symptoms with botulinum toxin therapy in the past 12 months
  • Prior attempt at pudendal nerve stimulation using an implanted lead
  • Treatment of urinary symptoms with tibial or sacral nerve stimulation in the past 3 months (prior experience of either before this time is permitted provided no implants remain in-situ)

Specific technical

  • Patient is significantly obese (defined as BMI ≥ 35) so as to limit electrode lead placement using standard approaches
  • Skin, orthopaedic or neurological anatomical limitations that could prevent successful placement of the electrode lead
  • Knowledge of planned MRIs, diathermy, microwave exposure, high output ultrasonic exposure, or RF energy exposure
  • Implantable neurostimulator, pacemaker or defibrillator in situ (anywhere in body including sacral and tibial)
  • Subject with a documented history of allergic response to titanium, zirconia, polyurethane, epoxy, or silicone

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT05241379

Layout table for location contacts
Contact: Crawley +447773326320 aidan@amber-tx.com

Layout table for location information
University Hospital Antwerp Recruiting
Antwerp, Belgium, 2650
Contact: Derickx    + 32 3 821 4734    Katleen.Derickx@uza.be   
Principal Investigator: De Wachter         
Sponsors and Collaborators
Amber Therapeutics Ltd
Layout table for additonal information
Responsible Party: Amber Therapeutics Ltd
ClinicalTrials.gov Identifier: NCT05241379    
Other Study ID Numbers: Amber AURA-2
First Posted: February 15, 2022    Key Record Dates
Last Update Posted: December 6, 2022
Last Verified: December 2022
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Layout table for additional information
Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Additional relevant MeSH terms:
Layout table for MeSH terms
Urinary Bladder, Overactive
Urinary Incontinence, Urge
Urinary Bladder Diseases
Urologic Diseases
Lower Urinary Tract Symptoms
Urological Manifestations
Urinary Incontinence
Urination Disorders