Nationwide investigations of intestinal obstruction in Japan

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Abstract
Two nationwide questionnaire surveys of intestinal obstruction in Japan were undertaken, covering two two-year periods, from January, 1975 to December, 1976 and from January, 1985 to December, 1986, respectively. The findings of a comparative review of these two surveys indicated that although the overall mortality of intestinal obstruction had not changed between 1975/76 and 1985/86, being 6.8 per cent and 6.5 per cent, respectively, simple adhesive obstruction had decreased from 3.2 per cent in 1975/76 to 2.0 per cent in 1985/86. The main cause of adhesion was laparotomy and in cases of both simple adhesive obstruction and strangulated adhesive obstruction, the rate of adhesion secondary to laparotomy of the upper gastrointestinal tract and colon and rectum had increased between 1975/76 and 1985/86. Obstructions caused by neoplasms had increased from 8.2 per cent in 1975/76 to 10.0 per cent in 1985/86, while those caused by adhesions had incresed further still, from 42.5 per cent in 1975/76 to 60.8 per cent in 1985/86. Among the latter group, nonoperatively treated cases had increased, which may be accounted for by the fact that facilities which adopt non-operative treatment using intestinal decompression as the first choice for simple adhesive obstruction cases have increased. In both surveys, the mortality of cases receiving nonoperative treatment was lower than that of operative cases.

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