Presentation of blunt small intestinal and mesenteric injuries.

During the 10 year period from 1988 to 1997, 64 patients with blunt small bowel and mesenteric injuries were treated at two trauma centres. The majority (52 cases) were victims of motor vehicle accidents, and 54% of them wore seat belts at the time of the accident. There were 22 small bowel injuries (17 full-thickness and 5 seromuscular) and 42 mesenteric injuries (7 with and 35 without a devascularised bowel segment). Shock on admission was present in 34% of the patients and generalised abdominal tenderness in 75%. Diagnostic peritoneal lavage was positive for blood in 25 out of 36 cases in which it was performed (69%), and positive for bowel content in 4/6 patients (67%) with full-thickness bowel perforations or transactions. Emergency room ultrasound was positive for blood in 13/25 cases (52%), and CT scan in 7/17 (41%). It is concluded that blunt small bowel and mesenteric injuries including patients with perforated or ischaemic bowel are difficult to diagnose using currently available diagnostic tools, and require a low threshold for exploration based on clinical suspicion in order to reduce the complications following delayed treatment of these injuries.