Login to Access Video or Poster Abstract: MP68-12
Sources of Funding: None

Introduction

There is no consensus for the term "staghorn calculi", "partial" or "complete", are designations that do not imply any volume judgment. "Staghorn morphometry", is defined as the stone volumetric burden distribution in the collecting system. Objective. Determine "stone morphometry" by preoperative computed tomography (CT).

Methods

Retrospective-analytical study. 46 patients, 2012-2016, CT at all. Using OsiriX Software, measurement of: Total stone volume (TSV: volume calculated with the reconstruction of the entire image of the stone), entry calix stone volume (ECSV: component of stone in entry calix), favorable calix stone volume (FCSV: component of stone in favorable calix).

Results

It was observe: TSV: 2753 ± 1423 mm3 and 56867 ± 26781 mm3 (p=<0,001), ECSV: 580 ± 474 mm3 and 17586 ± 13150 mm3 (p=<0,001), FCSV: 589 ± 569 mm3 and 17900 ± 13717 mm3 (p=<0,001), in cases with single and those with ≥ 2 tracts, respectively. TSV >5000 mm3, has 8 and 60 times greater risk for ≥2 stages and/or tracts, necessaries for stone free rates (CI 95: 2,05-33,16 and 9,01-40,16).

Conclusions

Stone morphometry, provides the volumetric stone distribution to be treated, and significantly influences to determine the number of tracts and/or stages necessary to achieve a stone free rate in patients with staghorn calculi who underwent percutaneous nephrolithotomy.

Funding

None