Long-term efficacy and safety of transanal irrigation in multiple sclerosis

Multiple sclerosis (MS) is the commonest disabling neurological disease in young adults. A majority of patients experience bowel dysfunction, reporting a wide spectrum of bowel symptoms that significantly negatively impact social activities and emotional state. Transanal irrigation (TAI) is a method of managing such bowel symptoms. We aimed to investigate long-term efficacy of TAI, to measure health status-related quality of life and identify factors predictive of TAI outcome.

Forty-nine consecutive MS patients (37 female; mean age 51, range 26-80) were studied. We investigated predominant symptoms, reason for beginning TAI and medical comorbidity. All patients underwent anorectal physiology testing. They completed Neurogenic Bowel Dysfunction and EQ-5D questionnaires at baseline and annual follow-up.

Mean follow-up was 40 months, at which there was 55% rate of continuation of TAI. Severe bowel dysfunction was present in 47% at baseline, falling to 18%. The EQ-5D scores at latest follow-up were not statistically significant, but 42% had improved visual analog scores. The only predictive factor for successful therapy was impaired anal electrosensitivity (p = 0.008).

Long-term continuation of TAI, with improved bowel symptomatology, is seen in the majority of patients. The EQ-5D is insufficiently sensitive to show change in MS patients that using TAI.