Author(s)

S. Kara & M Okandan

Abstract

One of the anorectal anomalies observed very commonly in our university hospital is the problem of closed rectum in the newborns. Before operating on the rectal area, a surgeon needs to stimulate the anorectal sphincter muscle in order to prevent any damage to the muscle itself while making a rectal opening. Stimulation of this muscle also helps to locate the rectal opening at the right place; otherwise false positioning of the opening might lead to some other undesirable problems. In this study, we have designed a stimulator that provides reasonably constant output current depending on the physiological impedance of the rectal area. The current amplitude can be set between 20 and 250 mAs. Stimulation pulses are adjusted for a duration of 230 ys and can be obtained at a repetition period between 1.75 and 20 ms. The hardware part is composed of five parts; 1) DC

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