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Maislos, S.D. et al.

Efficacy of the Stone Cone for treatment of proximal ureteral stones.

BACKGROUND AND PURPOSE: Whereas ureteroscopic lithotripsy is more efficacious than SWL in treating lower-ureteral stones, the same has not been universally said of its ability to treat proximal ureteral stones. Because failed proximal lithotripsy is often attributable to the complications associated with stone migration into the renal pelvis and calices, an instrument that can prevent this migration is a potentially important tool in the ureteroscopic armamentarium. This study sought to assess the role of just such an instrument, the Stone Cone, in proximal-ureteral lithotripsy. PATIENTS AND METHODS: We treated 19 consecutive patients having proximal-ureteral stones using semirigid ureteroscopy, a Stone Cone Nitinol urologic retrieval coil, and holmium:YAG laser lithotripsy with a 200- or 365-microm fiber. In all patients, both the Stone Cone and the laser fiber were utilized under direct visual guidance through the working channel(s) of the ureteroscope. RESULTS: All 19 patients were rendered stone free after Ho:YAG laser lithotripsy in conjunction with a Stone Cone. No stone fragments were noted to migrate into the renal pelvis, and the Stone Cone did not break or become entrapped in any of the 19 cases. CONCLUSION: The Stone Cone is a powerful new tool for proximal-ureteral lithotripsy and will likely revolutionize the treatment of proximal-ureteral stones. The savings in morbidity, time, and money associated with not having to chase stone fragments using flexible ureteroscopy are considerable.[1]

References

Efficacy of the Stone Cone for treatment of proximal ureteral stones. Maislos, S.D., Volpe, M., Albert, P.S., Raboy, A. J. Endourol. (2004) [Pubmed]

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