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  • Title: Does ureteral manipulation improve the effect of extracorporeal electromagnetic shock wave treatment on impacted ureteral calculi?--an experimental study.
    Author: Chen WC, Lee YH, Huang JK.
    Journal: Eur Urol; 1997; 31(4):493-6. PubMed ID: 9187913.
    Abstract:
    OBJECTIVE: We used an experimental study to evaluate the effects of ureteral manipulation on the disintegration of impacted ureteral calculi. METHODS: Fifteen urinary calculi were divided into 3 groups according to the type of ureteral manipulation. Group 1: control group, no manipulation; group 2: bypass catheterization, and group 3: below irrigation in porcine ureter. Each calculus was subjected to 500 shock wave pulses with 0.28 mJ/mm2 power density by a Siemens Lithostar II lithotriptor. RESULTS: The successful disintegration ratio for calculus sizes less than 4 and 2 mm was 79.4 +/- 13.1 and 42.2 +/- 7.5% (group 1), 82.3 +/- 5.2 and 43.5 +/- 2.4% (group 2) and 84.3 +/- 17.3 and 49.7 +/- 14.6% (group 3). There was no statistical difference among the 3 groups by Anova and the Kruskal-Wallis test. CONCLUSION: The ureteral manipulation of impacted ureteral calculi was unable to improve stone disintegration by shock wave.
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