Gastrointestinal Biopsychosocial Research Center

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)157 enrolled

Overview

This study has been completed. The following is a brief description of the aims, methods, and results of the study: Previous small studies suggest that chronic proctalgia (chronic recurring pain in the anal canal or rectum), which is also called levator ani syndrome, can be treated with biofeedback to teach relaxation of pelvic floor muscles, or electrogalvanic stimulation (electrical stimulation to relax muscles), or massage of pelvic floor muscles. The aim of this study was to compare the effectiveness of these three treatments, to determine how they work physiologically, and to identify which patients are most likely to benefit. Methods: Subjects had to meet the diagnostic criteria for chronic proctalgia and to report pain at least once a week. They had to also be free of medical or psychiatric disorders that could explain their chronic proctalgia. Patients qualified to enter the study were separated into two groups based on whether they reported tenderness when the examining physician pressed on the levator ani muscles of the pelvic floor. All 157 patients who were enrolled received 9 sessions of psychological counseling plus biofeedback or electrogalvanic stimulation or massage. The results of treatment were assessed at 1, 3, 6, and 12 months after the end of treatment.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Enrollment

157

Conditions

Chronic Proctalgia (Also Called Levator Ani Syndrome)

Interventions

BiofeedbackBEHAVIORAL

Electromyographic (EMG) activity was recorded from sensors placed in the anal canal, averaged, and displayed to patients to help them learn to relax the pelvic floor muscles during straining.

Electrogalvanic stimulationOTHER

Electrical stimulation was applied to pelvic floor muscles through an anal plug. Frequency was 80 pulses per sec, and voltage was slowly increased from 0 to 150-350 volts as tolerated.

Digital massageBEHAVIORAL

Using a gloved finger, the therapist pressed on the levator ani as firmly as tolerated and moved the finger from side to side 3-4 times.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 70 Years

Medical Language ↔ Plain English

Inclusion Criteria: Recurring episodes of pain or aching in the anal canal or rectum for at least 12 weeks in the previous year. Episodes last at least 20 minutes. Pain must occur at least weekly during a 4-week run-in. Exclusion Criteria: Other medical or psychiatric diagnoses that could explain recurring rectal pain. Daily use of psychotropic medications. Meets diagnostic criteria for irritable bowel syndrome or functional constipation. Screening studies included physical examination by a gastroenterologist, colonoscopy, pelvic ultrasound, and surgical consult in all patients and referral to a gynecologist or urologist if indicated by history.

Outcomes

Primary Outcomes

Adequate relief of pain (proctalgia)

Time frame: 1, 3, 6, and 12 months following treatment

Secondary Outcomes

Subjective pain improvement (ordinal scale)

Time frame: 1, 3, and 6 months follow-up

Number of days per month with rectal pain (inferred from 30 day symptom diary)

Time frame: Baseline, then 1, 3, and 6 months follow-up

Visual analog scale rating of pain averaged across weeks for 30 day diary period