Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 8/30/2025

Sacral Nerve Stimulation for Low Anterior Resection Syndrome

Clinical Decision Algorithm for SNS in LARS

  • The American Gastroenterological Association indicates that sacral nerve stimulation is medically indicated for patients with low anterior resection syndrome that has been refractory to conservative measures 1
  • The American Gastroenterological Association recommends evaluating patients for SNS candidacy if they are experiencing difficulty with bowel management following low anterior resection, and symptoms have persisted despite conservative treatment 1
  • The American Gastroenterological Association suggests that patients with no contraindications to implantation are suitable candidates for SNS 2
  • The American Gastroenterological Association advises implementing a two-stage approach, with the first stage involving peripheral nerve evaluation/test stimulation, and proceeding to permanent implantation if successful 2

Potential Complications and Management

  • The American Gastroenterological Association notes that pain or infection at the insertion site can occur in up to 10% of patients 2
  • The American Gastroenterological Association states that battery replacement is needed approximately every 7 years 2

Alternative Approaches if SNS Fails

  • The American Gastroenterological Association recommends ongoing medical management with emphasis on suppositories and enemas if SNS fails 3
  • The American Gastroenterological Association suggests evaluating patients for pelvic floor structural abnormalities if SNS is unsuccessful 3
  • The American Gastroenterological Association advises managing colonic motor dysfunction with prokinetic agents if SNS fails 3
  • The American Gastroenterological Association notes that anterograde colonic enema procedures can be considered, although they have lower long-term success rates in adults 3