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 Assess for intraperitoneal free fluid:Morison’s pouch is the most dependent area in the upper peritoneum when a patient is supine.The pelvis is the most dependent area of the peritoneum and the most likely place to see free fluid.

 Assess the urinary tract:To evaluate anuria/oliguria, perform a renal and bladder scan to look for urinary tract obstruction.Hydronephrosis appears as an anechoic area or ‘bear paws’ at center of kidney.Degree of hydronephrosis is related to degree of urinary tract obstruction.Distended, fluid‐filled (anechoic) bladder indicates bladder outlet obstruction.Bilateral hydronephrosis with normal/empty bladder indicates compression of both ureters.

 Assess for aortic aneurysm:Abdominal aortic aneurysm is defined as aortic diameter >3.0 cm.