RED Rectal Expulsion Device Procedure | Kernodle GI

RED “Rectal Expulsion Device” Procedure

The Rectal Expulsion Device (RED) is for patients with chronic constipation and pelvic floor disorders. It uses a self-inflating balloon to mimic the sensation of stool, helping doctors quickly determine if pelvic floor dysfunction is causing constipation. 

PURPOSE: Identifies constipation-related pelvic floor problems and rectal hypersensitivity by testing a patient’s ability to expel a balloon. 

PROCEDURE: A small, soft tube and balloon device is inserted into the rectum. Once positioned, a stopcock is opened, causing the balloon to self-inflate with foam to a set volume. 

ACTION: The patient tries to expel the device while sitting, mimicking a natural bowel movement. 

RESULTS: 

NORMAL: expulsion occurs between 5 and 120 seconds.

ABNORMAL: retention of the device for >60 seconds is considered abnormal. 

IMMEDIATE: expulsion in <5 seconds may indicate weak pelvic floor muscles. 

ADVANTAGES: it provides an immediate assessment during a clinic visit, acting as a faster, in-office alternative to traditional balloon expulsion tests BET) or more extensive anorectal manometry.

Image Courtesy: NeurAxis

The device, which is a single-use tool, was developed by researchers at the University of Michigan (Dr. Eric Shah and Dr. William D. Chey) to provide a more accessible way to diagnose and predict treatment outcomes for chronic constipation. 

At this time, Dr. Anna is the only provider at Kernodle Clinic scheduling this procedure.