Summary
The Piezolith 2200 uses piezoelectrically generated high-energy sonic pulses for extracorporeal urinary stone disintegration. The generator is self-focussing. Calculi as small as 1 mm in diameter can be localized by an integrated ultrasound location system. As treatment with the Piezolith does not cause any pain, patients are treated without anesthesia and without analgesia. Considering that cardiac arrhythmia does not occur with the piezoelectric equipment, the procedure is preferred for treatment of high-risk cardiac patients. Since the lithotriptor consists of a special mobile table with an opening in the surface to apply shock waves, the correct focus-position for lithotripsy can be found without difficulty, even in obese or small patients, or those with skeletal deformations.
From January 1986 to August 1987, 740 patients representing 764 renal units were successfully treated. A total of 710 calculi (92.9%) were located in the kidney; the rest (7.1%) consisted in stones of the upper and lower ureter treated in situ. To reduce post-therapy auxiliary procedures, internal stents are applied retrogradely in all calculi larger than 15 mm.
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Zwergel, U., Neisius, D., Zwergel, T. et al. Results and clinical management of extracorporeal piezoelectric lithotripsy (EPL) in 1321 consecutive treatments. World J Urol 5, 213–217 (1987). https://doi.org/10.1007/BF00327223
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DOI: https://doi.org/10.1007/BF00327223