Document Detail

Three-dimensional assessment of urinary stone on non-contrast helical computed tomography as the predictor of stonestreet formation after extracorporeal shock wave lithotripsy for stones smaller than 20 mm.
MedLine Citation:
PMID:  17645618     Owner:  NLM     Status:  MEDLINE    
The incidence of stonestreet formation after extracorporeal shock wave lithotripsy (ESWL) rises with increasing stone burden. However, stonestreet after ESWL is often experienced even in stones smaller than 20 mm. To examine whether the non-contrast helical computed tomography (CT) data could predict stonestreet formation in these stones, 53 radiopaque stones of 5-20 mm treated with ESWL were evaluated. Maximal dimension was measured on plain radiograph. From an attenuation value histogram graphed from the CT data, total stone volume and mean attenuation value were calculated. Seven stonestreets longer than 25 mm developed. There was no significant difference in maximal dimension and total stone volume between stones that did and stones that did not develop stonestreet. Mean attenuation value was the sole significant predictive factor. Application of mean attenuation value with cut-off level of 650 HU would anticipate stonestreet formation with a sensitivity of 85.7% and a specificity of 71.7%. The estimated risk of stonestreet formation is high in the treatment of stones with higher mean attenuation value.
Soichiro Yoshida; Tetsuo Hayashi; Makoto Morozumi; Hisato Osada; Norinari Honda; Takumi Yamada
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International journal of urology : official journal of the Japanese Urological Association     Volume:  14     ISSN:  0919-8172     ISO Abbreviation:  Int. J. Urol.     Publication Date:  2007 Jul 
Date Detail:
Created Date:  2007-07-24     Completed Date:  2007-12-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9440237     Medline TA:  Int J Urol     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  665-7     Citation Subset:  IM    
Department of Urology, Saitama Medical Center, Saitama Medical School, Kawagoe, Saitama, Japan.
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MeSH Terms
Imaging, Three-Dimensional*
Kidney Calculi / therapy*
Lithotripsy / adverse effects*
Predictive Value of Tests
Tomography, Spiral Computed*
Ureteral Calculi / etiology,  radiography*,  therapy*

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