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Is there a simpler method for predicting lower pole stone clearance after shockwave lithotripsy than measuring infundibulopelvic angle?

Lookup NU author(s): Dr Lakkur Murthy, Peter Ramsden


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Background and Purpose: Several anatomic factors influence the clearance of lower pole stones treated with shockwave lithotripsy (SWL), One of these is the infundibulopelvic angle, but its measurement is complex. Methods: We proposed a more simple measure of caliceal dependence, the caliceal pelvic height (CPH), which we defined as the distance between a horizontal line from the lowermost point of the calix containing the stone to the highest point of the lower lip of the renal pelvis. Results: In 62 patients who had SWL for solitary lower pole stones, a CPH <15 mm was associated with a stone clearance rate of 92%, whereas with a CPH greater than or equal to 15 mm, the clearance rate was only 52% (p < 0.05), A majority (74%) of the patients with an infundibular width of greater than or equal to 5 mm were rendered stone free compared with 40% of those with a width of <5 mm (p < 0.05), Conclusion: Measurement of the CPH, in conjunction with other anatomic factors, may more accurately predict the outcome of SWL in patients with lower pole stones.

Publication metadata

Author(s): Tuckey J, Devasia A, Murthy L, Ramsden P, Thomas D

Publication type: Article

Publication status: Published

Journal: Journal of Endourology

Year: 2000

Volume: 14

Issue: 6

Pages: 475-478

ISSN (print): 0892-7790

ISSN (electronic): 1557-900X

Publisher: Mary Ann Liebert, Inc. Publishers


DOI: 10.1089/end.2000.14.475


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