Abstract
In January 1986, a cooperative study was started at the Katharinenhospital in Stuttgart, FRG (modified Dornier HM-3) and Kreiskrankenhaus in Kempten, FRG (Wolf Piezolith 2200) to evaluate the range of indications, efficacy and required anesthesia of both lithotriptors. Stone classification and general indications for interventional therapy were similar in both centers. The Dornier HM-3 operates with a modified generator and a new ellipsoid which provide low pressure lithotripsy. With the Piezolith 2200, 99% of ESWL-treatments were performed without any anesthesia, whereas with the modified Dornier HM-3 lithotriptor, minor analgesia using tramadol was necessary in 92%, epidural anesthesia in 8%. The overall success rate was similar in both centers (Piezolith 2200: 94.5% vs Dornier HM-3: 98%). Only 46% of the patients were treated successfully in one session with the Wolf lithotriptor compared to 88% with the Dornier HM-3. Ultrasound localization with the Piezolith 2200 failed in 58% of ureteral calculi, whereas fluoroscopic stone localization (Dornier HM-3) was insufficient in the majority of slightly or nonopaque calculi.
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