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Vaginal bowel control device shown safe, effective in pivotal trial

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Further studies will reveal the value of this device

Fecal incontinence is one of the most emotionally devastating of all nonfatal medical conditions, and there is a need for new and effective strategies when medical therapy fails. The vaginal bowel control device appears to hold promise for some women with fecal incontinence by mechanically impeding stool passage to the anorectum by means of an inflatable balloon inserted into the vagina. The premise is that it can be used during times when the patient is not near to toileting facilities, can be inserted and removed at will, and is not a safety concern.

It is important to emphasize that this was not a randomized, placebo-controlled trial but rather a proof-of-concept study. The 40% complete continence response is 1) similar to that observed with the sacral nerve stimulation trial that resulted in Food and Drug Administration approval in the absence of a double-blind, controlled trial (Ann. Surg. 2010;1251:441), and 2) superior to the injectable bulking agent (6% complete continence), which was approved on the basis of a randomized, double-blind, sham-controlled trial (Lancet 2011;377:997).

However, complete continence is not necessary to improve quality of life in patients with incontinence. All three of these techniques require future studies to determine which incontinent patients are likely to benefit from each of these modalities. It must be recognized that there are many causes of incontinence, which often require different therapeutic approaches.

I look forward to reading a peer-reviewed paper on this new technique and to future randomized, controlled studies on this innovative approach to a condition with a large unmet need.

Dr. Arnold Wald is professor of medicine at the University of Wisconsin School of Medicine and Public Health, Madison.


 

AT AUGS/IUGA 2014

References

Scores on the Fecal Incontinence Quality of Life survey and the Modified Manchester Health Questionnaire improved significantly across all subscales. At 1 month, 86% reported their fecal incontinence to be "very much better" (57%) or "much better" (29%). Almost all – 96% – reported their insert to be comfortable, and half said they could not feel it.

To qualify for the six-center study, women had to have a history of fecal incontinence of at least 6 months, with 4 or more incontinence episodes recorded during a 2-week baseline bowel diary.

Study participants had a mean age of 61 years and a mean of 5.9 weekly fecal incontinence episodes (or 12 in their diaries).Thirty percent were obese. Nearly 50% had prior hysterectomy, 8% had prior pelvic prolapse surgery, and 15% had prior urinary incontinence surgery.

There were no device-related serious adverse events. The most common complaint was cramping or discomfort, which most often occurred during the fitting period. There were approximately a half-dozen reported changes in urinary incontinence or overactive bladder symptoms.

Courtesy Pelvalon Inc.

A diagram of the inflated balloon deflecting the rectovaginal septum.

"We believe that the Vaginal Bowel Control System can be tried early in the algorithm of treatment for fecal incontinence," Dr. Richter said.

It won’t be a good option for everyone, however. After being fitted with the device (it is made with three base sizes and two balloon sizes), women in the study were instructed to try it for a week before entering the 1-month treatment period. Approximately 40 women who were screened and fitted did not continue. This rate of discomfort or nonacceptance is similar to that associated with pessaries, Dr. Richter noted.

The initial fitting procedure for the new bowel control device "requires a little more provider and patient training, beyond [what is needed] for use of a traditional vaginal pessary," she said.

"Patients in the study could put the device in and take it out as they wished. Most patients used it all day long, and some took it out at night," she said. Patients were instructed to "take it out once or twice a week to wash it."

Dr. Richter is a paid consultant for Pelvalon. Her coinvestigators reported consulting for Pelvalon and other companies.

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