Urinary Stone Size: Comparison of Abdominal Plain Radiography and Noncontrast CT Measurements

Parsons, J. Kellogg; Lancini, Vanessa; Shetye, Kedar; Regan, Fintan; Potter, Steven R.; Jarrett, Thomas W.

doi:10.1089/089277903770802245

Cited by 26 publications

(7 citation statements)

References 13 publications

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“…If the stone was not identified exactly, unenhanced computed tomography (CT) was obtained. Similar measurements for stones 5 to 10 mm and 2 to 13 mm in size have been reported between non-contrast spiral CT and plain KUB for distal ureteral stones [8,9]. Therefore, we evaluated stone location and size by using KUB images and noncontrast CT.…”

Section: Methodsmentioning

confidence: 56%

Comparison and Efficacy of Low-Dose and Standard-Dose Tamsulosin and Alfuzosin in Medical Expulsive Therapy for Lower Ureteral Calculi: Prospective, Randomized, Comparative Study

et al. 2012

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PurposeTypically in Korea, for a standard dose (0.4 mg) of tamsulosin, two low doses (0.2 mg) are administered. The aim of this study was to evaluate and compare the efficacy of tamsulosin (0.2 mg and 0.4 mg) and alfuzosin (10 mg) in the treatment of lower ureteral stones.Materials and MethodsA total of 141 patients presenting with a single 4- to 10-mm sized lower ureteral stone were randomly assigned to 4 groups. Patients in group 1 (n=41) and group 2 (n=30) received an oral dose of 0.2 mg tamsulosin once and twice daily, respectively, and patients in group 3 (n=36) received a daily oral dose of 10 mg alfuzosin. Patients in group 4 (n=34) received trospium chloride only. The spontaneous passage of stones, the stone expulsion time, and adverse effects were evaluated.ResultsThere were no significant differences in patient background, including age, sex, BMI, stone size, stone side, and symptom duration. The spontaneous stone passage rate through the ureter was higher and the stone expulsion time was faster in groups 1, 2, and 3 than in group 4. There were no statistically different changes in groups 1, 2, and 3. The adverse effects observed in all groups were comparable and were mild.ConclusionsTamsulosin at 0.2 mg and 0.4 mg and alfuzosin (10 mg) proved to be safe and effective. A first cycle of medical expulsive therapy with tamsulosin 0.2 mg could be considered as an option in the management of single lower ureteral stone.

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Section: Methodsmentioning

confidence: 56%

Comparison and Efficacy of Low-Dose and Standard-Dose Tamsulosin and Alfuzosin in Medical Expulsive Therapy for Lower Ureteral Calculi: Prospective, Randomized, Comparative Study

et al. 2012

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“…[12][13][14] We previously examined the priority and utility of three parameters of renal stone burden (cumulative stone diameter [CSD], stone surface area [SA], and volume) at flexible URS and found that stone volume obtained by noncontrast CT (NCCT) and CSD obtained by kidneysureters-bladder (KUB) radiography were significantly and independently predictive of stone status after URS. 15 By contrast, SA was an inferior predictor of URS outcome compared with CSD and stone volume.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Preoperative Measurement of Stone Surface Area as a Predictor of Stone-Free Status After Combined Ureteroscopy with Holmium Laser Lithotripsy: A Single-Center Experience

Ito

Kawahara

Terao³

et al. 2013

Journal of Endourology

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Stone volume and SA were highly indicative of stone status after single semirigid URS, with or without a flexible component. The formula for cSA, maximum diameter×width×π×1/4, was demonstrated to accurately represent SA in this study. SA, however, indicated a lower clinical priority and utility as a predictor of stone status than stone volume. The combination of semirigid and flexible URS could access any ureteral stones, including those that semirigid URS alone could not treat. The cutoff points for these predictors of outcome were 110.0 mm(2) for cSA, 125.0 mm(2) for tSA, and 840.0 mm(3) for stone volume.

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“…In seven patients, renal calculi were identified, six of them non-obstructive, and the majority with < 6 mm in diameter and found in asymptomatic patients (24,25) . The absence of symptoms and the presence of small, non-obstructive calculi seem to represent favorable signs for indicating an expectative approach (26) . Amongst the cases presented to the gastroenterologist, the changes in the diagnosis were associated to steatosis, cholelithiasis and hepatic calcifications without perfusional alterations.…”

Section: Discussionmentioning

confidence: 99%

O valor da fase sem contraste na tomografia computadorizada do abdome

et al. 2008

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OBJECTIVE: To determine the role of the unenhanced phase of abdominal computed tomography in patients without a definite diagnosis or undergoing tumor staging. MATERIALS AND METHODS: A prospective and transversal study was developed with 100 consecutive patients submitted to unenhanced and contrastenhanced abdominal computed tomography. Two observers evaluated all the computed tomography images in the contrast-enhanced phase (first analysis) and, later, in the unenhanced phase (second analysis) in an attempt to establish the primary and secondary diagnoses as a function of the clinical indication for the study. The frequency of changes in the diagnoses resulting from a combined analysis of the images in the pre-and post-contrast phases was evaluated. Cases with changes in the diagnosis were reviewed by clinical specialists for determining possible changes in the therapeutic approach. RESULTS: Primary and secondary diagnoses were changed in respectively 1 and 18 cases (p = 1.000; p = 0.143) as follows: steatosis, adrenal nodules, nephrolithiasis, renal cysts and hepatic calcification. In the cases where the unenhanced phase changed the diagnosis, the specialists changed the therapeutic approach in 14 of the 19 patients (73%) (p = 0.038). CONCLUSION: No significant change was observed in the primary or secondary diagnosis as a result of the findings in the unenhanced phase. However, changes in secondary diagnoses affected the therapeutic approach adopted by the specialists. Keywords: Computed tomography; Contrast media; Abdomen.OBJETIVO: Determinar o valor agregado da fase sem meio de contraste da tomografia computadorizada do abdome em pacientes sem diagnóstico determinado ou em estadiamento tumoral. MATERIAIS E MÉTODOS: Estudo prospectivo e transversal em 100 pacientes consecutivos submetidos a tomografia computadorizada abdominal sem e com meio de contraste intravenoso. Dois examinadores avaliaram todos os exames, procurando estabelecer, através da fase com meio de contraste intravenoso (primeira análise) e posteriormente através da fase sem contraste (segunda análise), o diagnóstico principal e os secundários em função da indicação clínica do exame. Mediu-se a freqüência de mudança diagnóstica decorrente da análise combinada das fases pré-e pós-contraste intravenoso. Casos que tiveram mudança diagnóstica foram avaliados por especialistas clínicos para determinar se implicaria mudanças de conduta. RESULTADOS: Diagnósticos principal e secundário foram modificados em 1 e 18 casos, respectivamente (p = 1,000; p = 0,143). Os diagnósticos modificados foram: esteatose, definição de nódulo em adrenal, nefrolitíase, classificação de cistos renais e calcificação hepática. Nos casos em que a fase sem contraste modificou o diagnóstico, os especialistas mudaram sua conduta em 14/19 (73%) dos pacientes (p = 0,038). CONCLUSÃO: A fase sem contraste não modificou significativamente o diagnóstico principal ou secundário. Porém, as mudanças nos diagnós-ticos secundários influenciaram na conduta adotada pelos especialistas. Unite...

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Urinary Stone Size: Comparison of Abdominal Plain Radiography and Noncontrast CT Measurements

Cited by 26 publications

References 13 publications

Comparison and Efficacy of Low-Dose and Standard-Dose Tamsulosin and Alfuzosin in Medical Expulsive Therapy for Lower Ureteral Calculi: Prospective, Randomized, Comparative Study

Comparison and Efficacy of Low-Dose and Standard-Dose Tamsulosin and Alfuzosin in Medical Expulsive Therapy for Lower Ureteral Calculi: Prospective, Randomized, Comparative Study

Evaluation of Preoperative Measurement of Stone Surface Area as a Predictor of Stone-Free Status After Combined Ureteroscopy with Holmium Laser Lithotripsy: A Single-Center Experience

O valor da fase sem contraste na tomografia computadorizada do abdome

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