J.Jpn. Surg. Soc.. 59(10): 1645-1661, 1959

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EXPERIMENTAL STUDIES OF THE INTESTINAL ADHESION WITH SPECIAL REFERENCE TO THE MOTOR FUNCTION

Two or four loops of the small intestine of the rabbit were sutured together to form multiple adhesions. These operated loops were extracted after two weeks, one month, two months or three months and the movements of these loops were recorded by cinematography and by means of a modified Magnus' method, using serifines placed on each loop.
The transport of the intestinal content was easily observed by instilling or by inserting a painted balloon into the lumen.
I. The degree of adhesion was to some extent proportional to the time lapse after the operation. The adherent serosa was fibrinous and whitish in color. The intestinal content tends to stagnate longer at the turning loop.
II. In the slightly adherent loops, neither stagnation of the intestinal content, nor dilatation of the involved loops were found. The movements of these loops were relatively rhythmic in general. The peristaltic waves pass through the sites of the adhesion without difficulty. The frequency of the rhythmic contractions was smaller and they tend to to appear in groups.
III. In the more densely adherent intestinal loops, the stagnation of the content, dilatation and hypertrophy of the intestinal wall were conspicuous. The movements were so tonic and frequently spastic that the rhythmic contractions became indistinct. Antiperistaltic waves appear repeatedly at the turning loop and the intestinal content was expelled out of the dilated loop to reduce the intraluminal pressure. The reduction of this pressure resulted in the reappearance of the normal movements. The moter function of the adherent loops was characterized by the alteration of active phase with relatively inactive phase. The turning loop intermittently showed vigorous contractions presumably due to the overdistension of the intestinal wall. The amplitude of the movement just at the site of adhesion was rather small due to the mechanical hindrance. Although the transport of the fluid and solid contents through the site of adhesion showed rapid velocity because of the smaller intestinal caliber, their stream at the turning loop became sluggish or stagnant. The hindrance of the transport was greater when the content was solid, showing the repeated regurgitation in this place.
(author's abstract)

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