[Diffusion of piperacillin in the healthy human peritoneum after administration of a prophylactic dose].

The passage of piperacillin into the omentum was evaluated in 23 patients who received one single intravenous injection of 2 grams. Median concentrations were 7.05 micrograms.

[Unopened colostomy, a protective procedure for high risk colorectal anastomosis].

The classical "protective colostomy" upstream of a high risk colo-rectal anastomosis is not fully effective and requires subsequent reconstructive surgery. For these reasons, it is little used to date. Unopened colostomy provides complete obturation above the anastomosis and therefore effective protection.

[The radiolesions of the small bowel (author's transl)].

The irradiation of the pelvic abdominal cancers extends beyond the centre of the tumour and may induce actinic digestive lesions. The bowel and more rarely the small bowel--which is the subject-matter of our study--are concerned by those radiolesions that are favoured by therapeutic overdose, post-operative adhesions fastening the bows, radio-surgical or chemicostatic associations, and lastly by vascular or nutritive deficiencies. One may distinguish between two kinds of lesions, depending on the lapse of time before their coming out and on the symptoms.

[Surgical management of left colon and rectal radiation injuries (author's transl)].

A. First of all, we can affirm after the analysis of 132 records: the predominance of gynecologic cancers and the frequent responsibility of medical associations in the determinism of advanced radiation injuries of colon and rectum; the typically variable appearence of these injuries with an usual delay going from 6 months to a year and limits from 2 months to 35 years; the difficulty of diagnosis between radiation injurie and recurrence of cancer especially in case of fistula and the severe forecost in case of cancer radiation injurie association. B.

[Diagnostic traps and procedure to follow in radio-invisible biliary calculi].

Instead of the term biliary microlithiasis, the authors prefer the general concept of radio-invisible biliary lithiasis. The size, the homogeneity, the site and chemical composition of the gall stones, which are the usual criteria of biliary microlithiasis, also are valid for radio-invisibility; thus the diagnostic traps are the only original characteristics of a pathology with hazy outlines, defined as one which escapes well conducted a radiological exploration. Biliary micro-lithiasis therefore raises a triple problem.