Urinary Voiding as a Tool to Reduce Radiation Exposure in the Nuclear Stress Lab.

Rationale: Nuclear stress testing is being increasingly utilized in the cardiovascular risk stratification of patients. Radiation is an important consideration and attempts to minimize exposure should be implemented. Efficiency and cost effectiveness are cornerstones in the delivery of quality patient care and should also be considered when implementing change. Methods: We studied 88 consecutive patients who presented to our stress lab for pharmacologic nuclear stress testing. A single day rest and stress protocol with low level exercise was utilized for all patients. After the stress portion of the exam, we measured Geiger counter activity above the bladder area to establish a baseline. Patients were then allowed to void and repeat measurements were taken. Results: We detected a 16.9% reduction from baseline radiation levels above the bladder area post voiding. Conclusion: Urinary voiding is a simple, cost effective strategy at reducing radiation exposure in the nuclear stress lab.