Feasibility and Impact of a Decision Rule for Imaging of Emergency Department Patients With Suspected Kidney Stone

This is the third phase (feasibility and impact) of a three-phase project designed to derive, validate and test the feasibility and impact of implementing clinical decision support to safely limit the use of Computerized Tomography (CT) and its accompanying radiation and cost in emergency department patients with suspected renal colic. Hypothesis: Using a before and after model, integration of a clinical prediction rule into decisions about imaging in patients with suspected renal colic will result in a reduction of between 25-50% of radiation received from CT scanning in this population, without adverse affects on patient-centered outcomes.