[Ultrasonographic finding of hemoperitoneum and indication for laparotomy in blunt abdominal trauma].

The usefulness of the ultrasonography (US) for the indication for laparotomy was evaluated. I analyzed 200 blunt trauma patients who took US exams at my emergency center immediately after admission. Ninety-five percent of patients with hemodynamic instability, whose hemoperitoneum was revealed by US, underwent laparotomy. No negative laparotomy was performed in those patients. Only 5.4% of US hemoperitoneum-negative patients with stable hemodynamics required laparotomy because of peritoneal irritation or the evidence of traumatic diaphragmatic hernia. US hemoperitoneum-positive patients with stable hemodynamics were treated selectively, and 46% of such patients eventually underwent laparotomy, depending on findings of serial US, CT, DPL and Intravenous urogram. In two third of them laparotomy was indicated because of serial US showing the appearance or increase in hemoperitoneum. The maximum width of echo free space in Morison's pouch became more than 10 mm in the all exams when the laparotomy was indicated. I believe that US finding of hemoperitoneum should be an integral part of evaluating laparotomy indications in blunt abdominal trauma.