Self-limited controlling system for resolving fecal incontinence

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ABSTRACTUsing dogs, we first investigated colonic mechanical behavior specifically preceding physiological defection. To fulfilll this aim, four strain gaugages were fixed by suturing onto the colonic wall, and we recorded and evaluated colonic mechanical activities caused by tube feedings in awake and nonrestricted animals which potetially provoke gastrocolic reflex. As a consequence, mechanical contractions associated with ordinary defecation proved to be most prominent in the descending colon. On the other hand, another study for developing a technique of colonic electrical pacing was undertaken because current way based on tube feeding did not always led to subsequent defecation in our experiment. In this test, we concluded that electrical stimulation of the colon worked better when applied from inside, and the best pacing condition was specified as a combination of10 volts in voltage, 20 msec in duration, and 30 beats per minute in frequency. Our outcome is sure to support our goal of controlling fecal incontinence by a new self-limited circuit system consisting of an early perception of colonic behavior preceding bowel movements, and electrically-linked FES (so called functional electrical stimulation) of anal sphincter muscle which is insufficient for holding messy fecal soiling.