Retrospective Analysis of patients that received shockwave lithotripsy as Treatment of
ureteral or kidney Stones. Condition examinated is the effect of low molecular weight
Heparins and acetylsalicylic acid on the Formation of renal hematoma after shockwave
lithotripsy. Primary outcome is documented hematoma in a postoperative ultrasound control.
Secondary outcomes are perioperative complication, Need for erythrocyte tranfusion,
interventions for bleeding control, readmission or death within 30 days.