A MULTIVARIATE ANALYSIS OF RISK FACTORS ASSOCIATED WITH SUBCAPSULAR HEMATOMA FORMATION FOLLOWING ELECTROMAGNETIC SHOCK WAVE LITHOTRIPSY

Abstract

The incidence of renal hematoma formation following electromagnetic SWL for renal calculus was 4.1%. The probability of hematoma increased significantly with increasing patient age but it was not associated with increasing mean arterial pressure at treatment. These findings are in contrast to previous reports of hematoma associated with electrohydraulic SWL. These differences may be a consequence of the smaller focal zone and higher peak pressure associated with Storz Modulith electromagnetic SWL and, just as importantly, a consequence of the difference in the manner in which blood pressure was defined.