Early Implementation of Sacral Neuromodulation in Patients With Low Anterior Resection Syndrome.

August 10, 2026 updated by: Hospital Universitari Vall d'Hebron Research Institute

Early Implementation of Sacral Neuromodulation in Patients With Low Anterior Resection Syndrome: a Randomized, Multicenter, Prospective, Open-label, Pragmatic Study.

A randomized, prospective, multicenter, open-label, pragmatic pilot study of patients with Low Anterior Resection Syndrome treated early (<120 days after discharge following intestinal bypass reconstruction) with sacral nerve root neuromodulation, compared with another group receiving personalized conservative treatment as performed in routine clinical practice.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
40

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Spain
    • Catalonia
      • Barcelona, Catalonia, Spain, 08035

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Adult patients (18 years of age or older) who are capable of signing the appropriate informed consent form.
  • Patients who have undergone an anterior rectal resection for rectal cancer, with an anastomosis, whether or not they have received neoadjuvant therapy, and who have bowel function, either via a direct anastomosis or following reconstruction of a lateral ileostomy.
  • Patients who experience more than 6 episodes of urgency and/or incontinence in the following two weeks after the screening visit, as recorded in a daily bowel diary.
  • Patients with a LARS score >21 points (major or minor LARS).
  • Patients who report at least one symptom and one consequence as defined by the international definition.

Exclusion Criteria:

  • Metastatic disease at the time of surgery.
  • Need for adjuvant chemotherapy at the time of assessment.
  • Active chemotherapy.
  • Patients with an ileostomy.
  • Intellectual or language-related difficulty in answering the questionnaires.
  • Refusal to participate in the study or failure to commit to follow-up visits.
  • Patients with contraindications for sacral neuromodulation implantation (those with pacemakers, active infections, or allergies to prosthetic materials).
  • Patients with active inflammatory bowel disease at the time of surgery.
  • Patients who have undergone other intestinal resections in addition to rectal resection.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Sacral neuromodulation
Device: Sacral neuromodulation
Sacral neuromodulation implantation within 120 days from discharge following rectal surgery or bowel reconstruction (ileostomy closure)
No Intervention: Personalized conservative treatment

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
To evaluate bowel function in terms of at least a 50% improvement in episodes of urgency and/or incontinence due to LARS, as measured by a two-week bowel diary, following early NMS implantation compared with personalized conservative treatment.
Time Frame: 6 months
6 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Time Frame
Assess changes in the fragmentation component of the syndrome as recorded in the patient's daily bowel movement diary.
Time Frame: 6 months
6 months
Assess changes in stool consistency as recorded in the patient's daily bowel movement diary.
Time Frame: 6 months
6 months
Assess changes in soiling episodes as recorded in the patient's daily bowel movement diary.
Time Frame: 6 months
6 months
Assess changes in symptoms and outcomes as defined by the International Consensus Definition of LARS.
Time Frame: 6 months
6 months
Assess changes in bowel function in both groups using patient's daily bowel function and quality-of-life scales: the LARS score (Low Anterior Resection Syndrome Score), which divides patients in three groups: 0-20 No LARS; 21-29: Mild LARS; 30-42: Severe
Time Frame: 6 months
6 months
Assess changes in bowel function in both groups using patient's daily bowel function and quality-of-life scales: the Vaizey score, which measures the presence and severity of incontinence assigning a score from 0 (meaning complete continence) to 24 (mean
Time Frame: 5 years
5 years
Assess changes in bowel function in both groups using patient's daily bowel function and quality-of-life scales: ad hoc scale. The minimum value for the scale is 0 (meaning the worst health the patient can imagine) and the maximum value is 100 (meaning t
Time Frame: 6 months
6 months
Analyze subjective clinical improvement as assessed by patients using PGI-I scale (Patient Global Impression of Improvement). It consists of the answer to a question choosing one of 7 options from "1=Much better" to "7=Much worst".
Time Frame: 6 months
6 months
Examine changes in urinary and sexual function, analyzed by gender and specific scale. For male, the IIEF-5 (Índice Internacional De Función Erectil) will be used, which assesses erectile dysfunction from 5 (severe) to 25 (healthy). For female, The Rec
Time Frame: 6 months
6 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Hospital Universitari Vall d'Hebron Research Institute

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
August 1, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
August 1, 2029

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
February 1, 2030

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
July 27, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 10, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
August 12, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
August 12, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 10, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • E-SANLARS

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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