Renal colic is a common (1300 visits per year at our institution) and painful condition
caused by stones in the kidney and ureter, and can be mimicked by life threatening conditions
such as a ruptured abdominal aortic aneurysm (AAA). This can create clinical uncertainty.
Emergency department targeted ultrasound (EDTU) is performed by an emergency physician at the
patient's bedside, and has been shown to be accurate, safe, and efficient. We have shown that
EDTU can accurately identify hydronephrosis, which is a predictor of complications of kidney
stones. A normal formal ultrasound (US) predicts an uncomplicated clinical course. We will
assess the accuracy of EDTU for the diagnosis of hydronephrosis, and when normal, whether
patients can be safely discharged.