Prototype of Kidney Stone Ultrasonic Propulsion System (image) University of Washington Health Sciences/UW Medicine Share Print E-Mail Caption A prototype of an ultrasonic propulsion of kidney stones system being tested for NASA and developed at the University of Washington Applied Physics Laboratory. A similar system will be tested in UW Medicine emergency department patients to move kidney stones to prevent blockage and reduce pain. Credit Alice C. Gray Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.