A randomized clinical trial to assess the effectiveness of pre- and post-surgical pelvic floor physiotherapy for bowel symptoms, pelvic floor function, and quality of life of patients with rectal cancer: CARRET protocol.

BACKGROUND: There is scarcity of trials about preventative strategies for low anterior resection syndrome (LARS) in rectal cancer patients. The aim of this study is to evaluate the effectiveness of a pre- and post-surgical pelvic floor rehabilitation program on the bowel symptoms, pelvic floor function, and quality of life of rectal cancer patients.

METHODS: A randomized controlled trial with parallel groups (pelvic floor rehabilitation versus control group), with a blinded evaluator.

PARTICIPANTS AND SETTING: 56 stage I to III rectal cancer patients aged from 18 to 80 years old undergoing sphincter preservation surgery at Hospital del Salvador and who have a sufficient knowledge of Spanish.

MAIN OUTCOME MEASURES: ICIQ-B questionnaire for intestinal symptoms, high-resolution anorectal manometry (Alacer Multiplex 24-channel manometry equipment) for anorectal function, pelvic floor muscle strength test with Oxford Modified Scale, and a quality of life test with the EORTC QLQ C30 questionnaire. The evaluations will be carried out at five stages: before surgery, before and after the pelvic floor rehabilitation, and during a 3-month and 1-year follow-up.

INTERVENTIONS: one pre-rehabilitation session and 9 to 12 sessions of pelvic floor rehabilitation, including patient education, pelvic floor muscle exercises, pelvic floor electromyography biofeedback, and capacitive and sensory rectal training with a balloon probe. Rehabilitation will begin 3-5 weeks before the ileostomy is removed (four sessions) and around 3 weeks after stoma removal (5-8 sessions).

DISCUSSION: We expect the program to improve the bowel symptoms, pelvic floor function, and quality of life of rectal cancer patients.

TRIAL REGISTRATION: Australian New Zealand Clinical Trials Register ACTRN12620000040965 . Registered on 21 January 2020.