Three cases of patients who sustained rupture of the ileum following blunt trauma to the abdomen are reported. T h e onset of symptoms was delayed for a period which varied between 5 and 12 hours after the injury.As so many of these patients are either asymptomatic or have minimal symptoms for the first 6 hours after the injury it might be advisable to admit all cases of abdominal injury to hospital for observation.Laboratory investigations of the haemoglobin, white-blood count, and serum amylase contributed nothing to the early diagnosis of the condition. Plain radiographs of the abdomen show gas under the diaphragm in only 34 per cent of cases of traumatic rupture of the ileum.Needle aspiration of the abdomen for liberated intestinal contents was not carried out in this series.

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A technique has been developed for the establishment of a state of reversible, ureteric obstruction in the primate. Ten adult males had baseline 99mTc-DTPA renogram studies. A randomly selected ureter was totally occluded and obstruction confirmed on renogram. The occlusion was reversed and subsequent renograms confirmed recovery of activity in the obstructed kidneys of the eight animals who survived the reversal procedure. Seven were alive on conclusion of the study. Prevention of ureteric strictures was achieved with an intra-ureteric silastic tube. Autopsies demonstrated patency of every previously occluded ureter. This is the first study to be reported in primates, and the second overall, in which complete ureteric obstruction and its successful reversal has been confirmed on renogram using this surgical method. The technique is suitable for the study of the effect of reversible ureteric obstruction on renal function.

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