Comparison between ultrasound and noncontrast helical computed tomography for identification of acute ureterolithiasis in a teaching hospital setting

dc.contributor.authorSouza, Luís Ronan Marquez Ferreira de [UNIFESP]
dc.contributor.authorGoldman, Suzan Menasce [UNIFESP]
dc.contributor.authorFaintuch, Salomão [UNIFESP]
dc.contributor.authorFaria, Juliano Ferreira [UNIFESP]
dc.contributor.authorBekhor, Daniel [UNIFESP]
dc.contributor.authorTiferes, Dario Ariel [UNIFESP]
dc.contributor.authorOrtiz, Valdemar [UNIFESP]
dc.contributor.authorChoyke, Peter [UNIFESP]
dc.contributor.authorSzejnfeld, Jacob [UNIFESP]
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.date.accessioned2015-06-14T13:36:49Z
dc.date.available2015-06-14T13:36:49Z
dc.date.issued2007-03-01
dc.description.abstractCONTEXT AND OBJECTIVE: Recent studies have shown noncontrast computed tomography (NCT) to be more effective than ultrasound (US) for imaging acute ureterolithiasis. However, to our knowledge, there are few studies directly comparing these techniques in an emergency teaching hospital setting. The objectives of this study were to compare the diagnostic accuracy of US and NCT performed by senior radiology residents for diagnosing acute ureterolithiasis; and to assess interobserver agreement on tomography interpretations by residents and experienced abdominal radiologists. DESIGN AND SETTING: Prospective study of 52 consecutive patients, who underwent both US and NCT within an interval of eight hours, at Hospital São Paulo. METHODS: US scans were performed by senior residents and read by experienced radiologists. NCT scan images were read by senior residents, and subsequently by three abdominal radiologists. The interobserver variability was assessed using the kappa statistic. RESULTS: Ureteral calculi were found in 40 out of 52 patients (77%). US presented sensitivity of 22% and specificity of 100%. When collecting system dilatation was associated, US demonstrated 73% sensitivity, 82% specificity. The interobserver agreement in NCT analysis was very high with regard to identification of calculi, collecting system dilatation and stranding of perinephric fat. CONCLUSIONS: US has limited value for identifying ureteral calculi in comparison with NCT, even when collecting system dilatation is present. Residents and abdominal radiologists demonstrated excellent agreement rates for ureteral calculi, identification of collecting system dilatation and stranding of perinephric fat on NCT.en
dc.description.abstractCONTEXTO E OBJETIVO: Estudos atuais demonstram que a tomografia computadorizada helicoidal sem contraste (TC) apresenta maior acurácia do que a ultra-sonografia (US) no diagnóstico da ureterolitíase aguda, porém, poucos estudos a esse respeito foram realizados em atendimento radiológico de urgência de hospital universitário. Nossos objetivos foram comparar a sensibilidade diagnóstica da US com a TC realizadas por residentes no diagnóstico de ureterolitíase aguda e comparar a análise da TC interpretada por residentes e radiologistas experientes. TIPO DE ESTUDO E LOCAL: Estudo prospectivo de 52 pacientes com cólica renal aguda, que foram submetidos a exame de US seguido de TC em período máximo de oito horas no Hospital São Paulo. MÉTODOS: Os exames de US foram realizados por médicos residentes e conferidos pelos preceptores, já os de TC foram analisados por outro residente e posteriormente analisados por três radiologistas independentes. RESULTADOS: Nos 52 pacientes analisados foram encontrados 40 cálculos ureterais na TC (77%). A US apresentou uma sensibilidade de 22% e especificidade de 100%, que aumentou para 73% e 82% respectivamente, quando se associou a identificação da dilatação do sistema coletor. A TC analisada pelo residente e pelos radiologistas apresentou uma excelente correlação para identificação do cálculo ureteral, para heterogeneidade da gordura peri-renal e para dilatação do sistema coletor. CONCLUSÕES: A US realizada pelos residentes tem menor sensibilidade no diagnóstico da litíase ureteral, quando comparada à TC, mesmo quando associada à presença de dilatação do sistema coletor. Residentes e radiologistas especialistas apresentaram excelente concordância no diagnóstico de litíase ureteral.pt
dc.description.affiliationUniversidade Federal de São Paulo (UNIFESP) Escola Paulista de Medicina Diagnostic Imaging Department
dc.description.affiliationUnifespUNIFESP, EPM, Diagnostic Imaging Department
dc.description.sourceSciELO
dc.format.extent102-107
dc.identifierhttp://dx.doi.org/10.1590/S1516-31802007000200007
dc.identifier.citationSOUZA, Luís Ronan Marquez Ferreira de et al . Comparison between ultrasound and noncontrast helical computed tomography for identification of acute ureterolithiasis in a teaching hospital setting. Sao Paulo Med. J., São Paulo , v. 125, n. 2, p. 102-107, mar. 2007
dc.identifier.doi10.1590/S1516-31802007000200007
dc.identifier.fileS1516-31802007000200007.pdf
dc.identifier.issn1516-3180
dc.identifier.scieloS1516-31802007000200007
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/3620
dc.identifier.wosWOS:000258506900007
dc.language.isoeng
dc.publisherAssociação Paulista de Medicina - APM
dc.relation.ispartofSão Paulo Medical Journal
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectSpiral computed tomographyen
dc.subjectUltrasonographyen
dc.subjectUreteral calculien
dc.subjectLithiasisen
dc.subjectFlank painen
dc.subjectTomografia computadorizada espiralpt
dc.subjectUltra-sonografiapt
dc.subjectCálculos ureteraispt
dc.subjectLitíasept
dc.subjectDor no flancopt
dc.titleComparison between ultrasound and noncontrast helical computed tomography for identification of acute ureterolithiasis in a teaching hospital settingen
dc.title.alternativeComparação entre a ultra-sonografia e a tomografia computadorizada helicoidal sem contraste em atendimento radiológico de urgência no diagnóstico da litíase ureteral em pacientes com cólica renal agudapt
dc.typeinfo:eu-repo/semantics/article
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