Efficacy of Electrohydraulic and Laser Lithotripsy in the Ureter

Abstract

Since endourologic procedures were first introduced at the Atlanta Stone Center in 1982, electrohydraulic lithotripsy (EHL) has been utilized to fracture 62 ureteral calculi via antegrade (percutaneous) or retrograde (ureteroscopic) techniques. Using a 5F or a 3F probe, success was achieved in 60 cases (97%). Intravenous urlograms were performed in 60 patients after treatment, and only one revealed mild hydronephrosis. Six perforations of the ureter and two ureteral stone extrusions were managed conservatively with good results. Recently, having incorporated the pulsed dye laser as an alternative modality to manage ureteral calculi, 22 patients with ureteral stones have been treated at the Center via either an antegrade or a retrograde approach. Twenty stones (91%) were considered successfully fractured. Intravenous urlograms were performed in only two patients, and both were normal. There were no perforations directly attributed to the laser probe. The two failures were calcium oxalate monohydrate stones. In summary, both modalities proved safe and efficacious. There is a significant cost difference favoring EHL; however, at this time, the laser probe offers the advantages of more flexibility and a smaller diameter.

Modifizierte Druckpulsqualitäten und eine neue Sondenspitze zur elektrohydraulischen Lithotripsie im Harnleiter

“…Dünnste und flexible Endoskope erlauben zur Lithotripsie nur den Einsatz des gepulsten Lasers und der elektrohydraulischen Lithotripsie (EHL) (2,6,8,12,17). Obwohl beide Verfahren auf demselben Prinzip der Dampf-oder Plasmaexplosion beruhen (10), galt die EHL lange Zeit als zu traumatisch für eine Anwendung im Harnleiter (1,4,5,9,10,16).…”