Prehospital ultrasound scanning for abdominal free fluid detection in trauma patients: a systematic review and meta-analysis.

Introduction: Focused assessment with sonography for trauma helps detect abdominal free fluid. Prehospital ultrasound scanning is also important because the early diagnosis of hemoperitoneum may reduce the time to definitive treatment in the hospital. This study investigated whether prehospital ultrasound scanning can help detect abdominal free fluid.