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dc.contributor.CRUESPUNIVERSIDADE DE ESTADUAL DE CAMPINASpt_BR
dc.typeArtigopt_BR
dc.titleCorrelation Between Hounsfield Unit Value And Stone Composition In Nephrolithiasisen
dc.title.alternativeCorrelação Entre Os Valores De Unidades Hounsfield E A Composição Cristalina Na Nefrolitíasept_BR
dc.contributor.authorSilvapt_BR
dc.contributor.authorTennyson Rene; Limapt_BR
dc.contributor.authorMarcelo Lopes dept_BR
unicamp.authorUniversidade Estadual de Campinas Department of Surgery Division of Urology, Campinas SP, Brazilpt_BR
dc.subjectUrinary Calculien
dc.subjectLithotripsyen
dc.subjectTomographyen
dc.subjectHounsfield Uniten
dc.subjectCálculo Urinárioen
dc.subjectLitotripsiaen
dc.subjectTomografiaen
dc.subjectUnidades Hounsfieden
dc.description.abstractTo 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.en
dc.relation.ispartofMedicalExpresspt_BR
dc.publisherMavera Edições Técnicas e Científicas Ltdapt_BR
dc.date.issued2016pt_BR
dc.identifier.citationMedicalexpress. Mavera Edições Técnicas E Científicas Ltda, v. 3, n. 3, p.pt_BR
dc.language.isoInglespt_BR
dc.description.volume3pt_BR
dc.description.issuenumber3pt_BR
dc.rightsabertopt_BR
dc.sourceScielopt_BR
dc.identifier.issn2358-0429pt_BR
dc.identifier.idScieloS2358-04292016000300003pt_BR
dc.identifier.urlhttp://www.scielo.br/scielo.php?script=sci_abstract&pid=S2358-04292016000300003&lng=es&nrm=iso&tlng=enpt_BR
dc.date.available2017-08-30T17:37:55Z-
dc.date.accessioned2017-08-30T17:37:55Z-
dc.description.provenanceMade available in DSpace on 2017-08-30T17:37:55Z (GMT). No. of bitstreams: 1 S2358-04292016000300003.pdf: 1054209 bytes, checksum: 52203d0142b3a208618edf2af6c02a22 (MD5) Previous issue date: 2016en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/324934-
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