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RecruitingNCT04547816Updated Aug 3, 2025

Efficacy of Conservative Treatment of Functional Defecatory Disorders in Females With Pelvic Organ Prolapse

A Phase 3 interventional study of Biofeedback therapy and Tibial neuromodulation in Pelvic Floor Prolapse, Functional Constipation and Rectocele, sponsored by Federal State Budgetary Scientific Institution. Recruiting at 2 sites in Russia. Open to female participants aged 18 Years to 70 Years. Per ClinicalTrials.gov, last updated 2025-08-03.

Sponsored by Federal State Budgetary Scientific Institution · Phase 3, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Dec 2025, 10 months ago, but the record still lists the study as recruiting.
  • Started Jul 2020; still recruiting 6 years 4 months later.
Phase
Phase 3
Study type
Interventional
Enrollment
100
Allocation
Randomized
Ages
18 Years to 70 Years
Sex
Female
01

Study summary

This study is planned to evaluate the efficacy of complex conservative treatment (including tibial neuromodulation, biofeedback therapy, special pelvic floor training and diet modification) in women with pelvic organ prolapse

Read the detailed description

Pelvic organ prolapse is a condition with impaired anatomic structure, which may result in defecatory disorders and usually considered as an indication for surgery. However, operation is not always possible. Existing data suggest that functional component may also be possible, despite on the anatomic impairment. The aim of the study is to evaluate the effect of complex conservative treatment of functional defecatory disorders in patients with mild to moderate grade of pelvic organ prolapse

02

Conditions studied

  • Pelvic Floor Prolapse
  • Functional Constipation
  • Rectocele

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Keywords

  • pelvic floor prolapse
  • conservative treatment
  • functional disorders of defecation
  • rectocele
  • diet modification
  • biofeedback therapy
  • tibial neuromodulation
03

In context

Rectocele

50 studies on the registry are indexed under Rectocele; 9 are open to participants now.

This study's planned enrollment of 100 is above the median of 62 across 37 interventional studies indexed under Rectocele.

Browse Rectocele studies →

Lead sponsor

Federal State Budgetary Scientific Institution is the lead sponsor of 7 studies on the registry; 5 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 70 Years
Sexes eligible
Female
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Willingness to participate (signed form)
  • Females with rectocele I-II grade or rectocele I-II grade and internal rectal invagination and functional defecatory disorders (per Rome IV guidelines) confirmed on the basis of complex examination including high-resolution anorectal manometry

Exclusion criteria

Exclusion Criteria:

  • rectocele III grade;
  • internal genitals prolapse;
  • history of abdominal or pelvic surgery that may impact bowel motility (excluding non-complicated appendectomy or laparoscopic cholecystectomy);
  • gynecological surgery that may influence sensory or reservoir function of rectum;
  • history of major cardiovascular events, or presence of current conditions that in case of participation of the patient in the study may put her at risk of exacerbation or complication;
  • start of any new concomitant medication with mechanisms of action that influence rectal motility, sensory function, muscle tone and/or contractility
  • inability to understand and/or follow the instructions to perform all the procedures required per protocol
  • general condition of the patient that make her ineligible by the discretion of the investigator
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Investigator, Outcomes assessor)
Enrollment
100 participants (estimated)

Study arms

  • Experimental
    biofeedback and tibial neuromodulation (BFB+TNM)

    Procedure: Biofeedback therapy · Procedure: Tibial neuromodulation

  • Experimental
    BFB+TNM + pelvic floor muscles training (PFMT)

    Procedure: Biofeedback therapy · Procedure: Tibial neuromodulation · Behavioral: Pelvic floor muscles training

  • Experimental
    BFB+TNM+PFMT+diet modification

    Procedure: Biofeedback therapy · Procedure: Tibial neuromodulation · Behavioral: Pelvic floor muscles training · Behavioral: Diet modification

Interventions

  • ProcedureBiofeedback therapy

    Biofeedback therapy is a procedure when the patient is taught to make proper squeezing by adequate increase of intra-abdominal and rectal pressures and relaxation of the muscles of the pelvic floor. This procedure is widely described and is to be performed with the use of devices registered for this purpose Urostim and WPM Solar, MMS, the Netherlands

    Also known as: BFB

  • ProcedureTibial neuromodulation

    TNM is a standard procedure that is previously described as an effective method to treat functional insufficiency of the anal sphincter. It acts on the lumbosacral nerve plexus with an electric current through the posterior tibial nerve of one of the patient's limbs. For the study purpose a registered device for electric therapy (BioBravo, MTR Plus Vertriebs GmbH, Germany) is to be used.

    Also known as: TNM

  • BehavioralPelvic floor muscles training

    PFMT is a complex of 5 exercises aimed to make functional training of pelvic floor muscles. This complex does not require additional equipment. It may be performed at home. The patients will be trained to perform this complex of exercises by a healthcare provider. The complex of physical therapy consists of a single basic exercise for training coordinated muscle tension of abdominal wall and relaxation of the pelvic floor muscles, and 4 exercises to increase the contractility of pelvic floor muscles without additional involvement of the muscles of the abdominal wall. This allows to coordinate and consciously control the contraction and relaxation of the pelvic diaphragm. Initial course of training is 10 working days. Than patients continue the intervention for 6 months at home with online monitoring of the correctness and regularity of training.

    Also known as: PFMT

  • BehavioralDiet modification

    Diet modification play an important role in the regulation of colonic transit and defecation. Dietary factors may act through faecal bulk by additional stimulation of mechanoreceptors of the rectum. At the same time, adequate intake of vitamins (for example, B12) may improve electric conductivity of nerves and thus impact the tone of pelvic floor muscles. Among other factors known to affect functional state of pelvic floor muscles and colonic transit are dietary fibers, adequate intake of water, regular meal intake. For the study purposes, it is planned to provide standard recommendation based on the national recommended daily allowances according to patients' sex, age and physical activity level.

    Also known as: DM

06

What researchers measure

Primary outcomes

  1. Mean stool frequency

    clinical outcome

    Time frame: A week

  2. Mean stool form value

    clinical outcome, assessed with the use of the Bristol stool scale (BSS)

    Time frame: A week

  3. Mean defecation with difficult bowel emptying

    patient-reported outcome, clinical

    Time frame: a week

  4. Change of KESS scale points

    A specialized validated questionnaire will be used before treatment and at the end of the study. "Change" is to be assessed as percentage decline from baseline values.

    Time frame: at the end-point, 6 months after enrolment

  5. Change in Scale of bowel evacuatory function assessment

    A specialized validated questionnaire will be used before treatment and at the end of the study. "Change" is to be assessed as percentage decline from baseline v

    Time frame: at the end-point, 6 months after enrolment

  6. Average anal resting pressure

    Values obtained during HR anorectal manometry

    Time frame: at the end-point, 6 months after enrolment

  7. Maximum absolute anal squeeze pressure

    Values obtained during HR anorectal manometry

    Time frame: at the end-point, 6 months after enrolment

  8. Average absolute anal squeeze pressure

    Values obtained during HR anorectal manometry

    Time frame: at the end-point, 6 months after enrolment

  9. Average incremental anal squeeze pressure

    Values obtained during HR anorectal manometry

    Time frame: at the end-point, 6 months after enrolmentat the end-point, 6 months after enrolment

  10. Residual push pressure

    Values obtained during HR anorectal manometry

    Time frame: at the end-point, 6 months after enrolment

  11. Push relaxation percentage

    Values obtained during HR anorectal manometry

    Time frame: at the end-point, 6 months after enrolment

07

Study locations

2 of 2 sites recruiting
  • Federal State Budgetary Scientific Institution "Federal Research Centre of Nutrition, Biotechnology
    Moscow, 115446, Russia
    Recruiting
    • Sergey Morozov, MD, PhD · Contactmorosoffsv@mail.ru · +79104681801
    • Marina Biryukova, MD · Contactbibi24@yandex.ru · +74997943572
    • Marina Biryukova, MD · Sub investigator
  • Federal Research Center of Coloproctology
    Moscow, Russia
    Recruiting
08

References and documents

Individual participant data

Plan to share: Yes

Supporting information: Study protocol, Statistical analysis plan, Informed consent form, Clinical study report

Time frame: within 2 years after study completion

Access criteria: per request

Data sharing details ↗ · ion.ru

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 3, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04547816
Lead sponsor
Federal State Budgetary Scientific Institution
Collaborators
State Scientific Centre of Coloproctology, Russian Federation, Ministry of Health, Russian Federation, Ministry of Science and Higher Education, Russian Federation
Responsible party
Sergey Morozov (MD, PhD, Federal State Budgetary Scientific Institution) — Principal investigator
First posted
Sep 14, 2020
Start date
Jul 1, 2020
Primary completion
Dec 31, 2025 (estimated)
Completion
May 31, 2026 (estimated)
Last update
Aug 3, 2025

Study contacts

Sergey Morozov, MD, PhD
Contact
morosoffsv@mail.ru
+79104681801
Oksana Fomenko, MD, PhD
Contact
oksana671@yandex.ru
+79164817323

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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