Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/324934
Type: Artigo
Title: Correlation Between Hounsfield Unit Value And Stone Composition In Nephrolithiasis
Title Alternative: Correlação Entre Os Valores De Unidades Hounsfield E A Composição Cristalina Na Nefrolitíase
Author: Silva
Tennyson Rene; Lima
Marcelo Lopes de
Abstract: To examine whether the Hounsfield Unit value predicts calcium oxalate monohydrate stones in patients who are undergoing percutaneous nephrolithotomy. METHOD: 119 patients who underwent percutaneous nephrolithotomy were prospectively evaluated between February 2012 and August 2014. Using thin cuts, the highest single-energy computed tomography attenuation value within a pixel was measured for each stone. Data regarding age and gender were assessed before surgery. The extracted stones were analyzed using infrared spectrophotometry. RESULTS: By receiver operating characteristics analysis, a cutoff value of 1548 Hounsfield Unit and an age of 42.5 years were used to determine the likelihood of a stone being composed of calcium oxalate monohydrate. A higher Hounsfield Unit value and increased age augmented the chances of a stone being composed of calcium oxalate monohydrate. In general, females had a greater likelihood of harboring calcium oxalate monohydrate stones than males. CONCLUSION: The maximum Hounsfield Unit value, as determined by unenhanced single-energy computed tomography in association with gender, predicts the presence of calcium oxalate monohydrate stones in patients who are undergoing percutaneous nephrolithotomy.
Subject: Urinary Calculi
Lithotripsy
Tomography
Hounsfield Unit
Cálculo Urinário
Litotripsia
Tomografia
Unidades Hounsfied
Editor: Mavera Edições Técnicas e Científicas Ltda
Rights: aberto
Address: http://www.scielo.br/scielo.php?script=sci_abstract&pid=S2358-04292016000300003&lng=es&nrm=iso&tlng=en
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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