Abdominal injuries without hemoperitoneum: A potential limitation of focused abdominal sonography for trauma (FAST)

William C. Chiu, Brad M. Cushing, Aurelio Rodriguez*, Shiu M. Ho, Stuart E. Mirvis, K. Shanmuganathan, Michael Stein

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

216 Scopus citations


Background: Focused abdominal sonography for trauma (FAST) relies on hemoperitoneum to identify patients with injury. Blunt trauma victims (BTVs) with abdominal injury, but without hemoperitoneum, on admission are at risk for missed injury. Methods: Clinical, radiologic, and FAST data were collected prospectively on BTVs over a 12-month period. All patients with FAST-negative for hemoperitoneum were further analyzed. Examination findings and associated injuries were evaluated for association with abdominal lesions. Results: Of 772 BTVs undergoing FAST, 52 (7%) had abdominal injury. Fifteen of 52 (29%) had no hemoperitoneum by admission computed tomographic scan, and all had FAST interpreted as negative. Four patients with splenic injury underwent laparotomy. Six other patients with splenic injury and five patients with hepatic injury were managed nonoperatively. Clinical risk factory significantly associated with abdominal injury in BTVs without hemoperitoneum include: abrasion, contusion, pain, or tenderness in the lower chest or upper abdomen; pulmonary contusion; lower rib fractures; hemo- or pneumothorax; hematuria; pelvic fracture; and thoracolumbar spine fracture. Conclusions: Up to 29% of abdominal injuries may be missed if BTVs are evaluated with admission FAST as the sole diagnostic tool. Consideration of examination findings and associated injuries should reduce the risk of missed abdominal injury in BTVs with negative FAST results.

Original languageEnglish
Pages (from-to)617-625
Number of pages9
JournalJournal of Trauma
Issue number4
StatePublished - Apr 1997


  • Abdominal injuries
  • Blunt trauma
  • Hemoperitoneum
  • Sonography
  • Ultrasound


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