An interventional study of Sacral neuromodulation in Low Anterior Resection Syndrome (LARS), sponsored by Hospital Universitari Vall d'Hebron Research Institute. Not yet recruiting at 1 site in Spain. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-08-12.
Sponsored by Hospital Universitari Vall d'Hebron Research Institute · Not applicable, Interventional, and Treatment
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.
82 studies on the registry are indexed under Low Anterior Resection Syndrome; 38 are open to participants now.
This study's planned enrollment of 40 is below the median of 72 across 56 interventional studies indexed under Low Anterior Resection Syndrome.
Browse Low Anterior Resection Syndrome studies →Hospital Universitari Vall d'Hebron Research Institute is the lead sponsor of 276 studies on the registry; 64 are open to participants now.
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Exclusion Criteria:
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.
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.
Neoadjuvant treatment is given before the main treatment (usually surgery), often to shrink a tumour. Adjuvant treatment is given after it, to lower the chance of the cancer coming back.
Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Adjuvant and neoadjuvant
Neoadjuvant treatment is given before the main treatment (usually surgery), often to shrink a tumour. Adjuvant treatment is given after it, to lower the chance of the cancer coming back.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Metastases
Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraindication
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Device: Sacral neuromodulation
Sacral neuromodulation implantation within 120 days from discharge following rectal surgery or bowel reconstruction (ileostomy closure)
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
Assess changes in the fragmentation component of the syndrome as recorded in the patient's daily bowel movement diary.
Time frame: 6 months
Assess changes in stool consistency as recorded in the patient's daily bowel movement diary.
Time frame: 6 months
Assess changes in soiling episodes as recorded in the patient's daily bowel movement diary.
Time frame: 6 months
Assess changes in symptoms and outcomes as defined by the International Consensus Definition of LARS.
Time frame: 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
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
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
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
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
Plan to share: No
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This study is not yet recruiting, as verified in Jul 2026. You cannot join it, but the record below documents what was studied.
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Low Anterior Resection Syndrome →
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