Composition of kidney stone fragments obtained after extracorporeal shock wave lithotripsy.
BACKGROUND
The objective of this study was to determine the composition of kidney stone fragments obtained after extracorporeal shock wave lithotripsy (ESWL).


METHODS
Kidney stone fragments from 25 patients with urolithiasis treated with ESWL were submitted for morphological analysis. The composition was determined for all the recovered fragments.


RESULTS
Thirteen patients (52%) had pure stones. The most common type of pure stone was calcium oxalate (61.6%), of which half was the monohydrate type (COM) and half was the dihydrate type (COD). The other pure stones consisted of either uric acid (30.8%) or struvite (7.6%). For mixed stones, the most frequently observed component was COM or COD (50%), followed by a mixture of COD and carbapatite (25.1%).


CONCLUSIONS
Our findings indicate that the composition of kidney stone fragments recovered after ESWL can be determined. Knowledge of stone composition is fundamental to understand the etiology of lithogenesis.
Ribeiro da Silva
Silvia Fernandes
SF
Center for Research in Hepatic and Renal Diseases, Federal University of Ceará (UFC), Fortaleza, Ceará, Brazil. silviafernandes@unifor.br
Leite da Silva
Sônia
S
De Francesco Daher
Elizabeth
E
de Holanda Campos
Henry
H
Bruno da Silva
Carlos Antônio
CA
D000328:Adult; D000368:Aged; D002129:Calcium Oxalate / Q000032:analysis; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000737:chemistry*; D008096:Lithotripsy; D017616:Magnesium Compounds / Q000032:analysis; D008297:Male; D008875:Middle Aged; D010710:Phosphates / Q000032:analysis; D000069877:Struvite; D014527:Uric Acid / Q000032:analysis
D017616:Magnesium Compounds; D010710:Phosphates; D002129:Calcium Oxalate; D014527:Uric Acid; D000069877:Struvite