J.Jpn. Surg. Soc.. 59(4): 569-588, 1958

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STUDY ON THE INTESTINAL SOUNDS

1) Intestinal sounds were electrically recorded by means of a sound recording apparatus which was constructed by the author using a magnetic tape recorder, and the characteristic patterns of the normal and pathological intestinal sounds were investigated.
2) In case of hunger, in normal person, the staccato pop sounds from 120 to 150 cycles constantly heard irregularly and sporadically. After a meal, rather strong pop sounds are heard as a single, or, sometimes, as grouped sounds.
3) In case of diarrhea, the gurgling, rattle and crackling sounds from 200 to 300 cycles are frequently and strongly heard, however, as for the rhythm, it is the same as in a normal case.
4) In case of acute perforative peritonitis, no intestinal sound is heard, or very weak stacccato pop sounds are seldom heared.
5) After laparotomy, the intestinal sounds gradually recovers from the paralysed state and becomes very active after a natural flatulence, and then, it grows weak again recovering to the normal state in a week or so.
6) In case of acute intesinal obstruction, two studia may be heard by turns, i. e., the studim when a thunder of gurgling, rattle and crackling can be heard, and the studium when the noises are weak. The more the intestine undergoes organic changes, the more remarkable the phenomenon of motor fluctuation becomes, and the more the silent studium is prolonged. In the experiments on rabbits, the phenomenon of motor fluctuation becomes apparent in 24 hours after the beginning of intestinal obstruction, and becomes typical in 48 hours.
7) In case of chronic intestinal obstruction, although a thunder of noise rises periodically, the silent studium is not distinct. Therefore, the phenomenon of motor fluctuation is not clearly distinguished.
(author's abstract)

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