Utility of ultrasound after a negative CT abdomen and pelvis in the emergency department.

Purpose: The purpose of this study is to assess the utility of an abdominal and/or pelvic ultrasound (US) performed within 24 h after a negative CT of the abdomen and pelvis (CTAP) in the emergency department (ED). The secondary endpoint is to assess whether there is a significant increase in length of stay (LOS) in the ED due to immediate US reimaging.

Method: We reviewed the imaging reports of 335 patients over the course of 3 years in our ED who had an US within 24 h after a negative CTAP.