Ultrasound Velocity — A Measure of Stone Strength?
Urinary stones exhibit a variable response to extracorporeal Shockwave lithotripsy (ESWL) and endoscopic lithotripsy. Although fragmentation is affected by the patient’s size, the type of Shockwave generating system, mode of localisation etc, it is also known that the physico-chemical characteristics of calculi affect treatment outcome. However it is still unclear why some stones break more readily than others. Although chemical composition has been proposed as an important factor, a literature review revealed conflicting results.