The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
Sang Won Han - One of the best experts on this subject based on the ideXlab platform.
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Algorithm for managing the treatment of prepubertal epididymitis; VCUG, voiding Cystourethrography; RGU, retrograde urethrography.
2018Co-Authors: Yong Seung Lee, Sang Woon Kim, Sang Won HanAbstract:Algorithm for managing the treatment of prepubertal epididymitis; VCUG, voiding Cystourethrography; RGU, retrograde urethrography.
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the clinical significance of intrarenal reflux in voiding Cystourethrography vcug
Korean Journal of Urology, 2010Co-Authors: Sang Woon Kim, Chang Hee Hong, Sang Won HanAbstract:Purpose: Intrarenal reflux (IRR) occurs in 3-10% of cases of total reflux and can lead to renal injury, which may eventually result in renal scarring. In this study, we evaluated the clinical importance of IRR detected by voiding Cystourethrography and evaluated the relationship between IRR and renal scarring. Materials and Methods: From January 2002 to May 2008, 50 patients who were diagnosed with vesicoureteral reflux (VUR) and showed IRR in voiding Cystourethrography were enrolled. IRR was seen in 59 renal units in our enrolled patients. A 99m Tc 2,3-dimercaptosuccinic acid (DMSA) renal scan was performed after VUR was detected in all cases. Nine patients were conservatively treated with prophylactic antibiotics, whereas 41 patients received an anti-reflux operation. A follow-up renal scan was performed after 3 to 6 months to check for any changes in renal scarring. Results: The average patient age was 9.2 months (range, 1-42 months). Forty-nine patients were male; only one patient was female. The mean duration until surgery was 2.9 months. Generally, the IRR sites corresponded to the sites of photon defects on DMSA renal scans (76.3%). Furthermore, the photon defects on IRR sites tended to progress to renal scarring (65.2%). The rate of change in scarring was lower in the surgery group (47.1%) than in the prophylactic antibiotic group (75%). Conclusions: IRR sites and the sites of photon defects on DMSA renal scans showed a high correspondence, and these sites tended to progress to renal scarring. We suggest that VUR with IRR should be actively managed to decrease the chances of renal
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does every patient with ureteropelvic junction obstruction need voiding Cystourethrography
The Journal of Urology, 2001Co-Authors: Young Sig Kim, Chang Hee Hong, Myung Joon Kim, Seung Kang Choi, Sang Won HanAbstract:Purpose: Voiding Cystourethrography is routinely recommended to detect vesicoureteral reflux in children with ureteropelvic junction obstruction. Vesicouretral reflux coexisting with primary ureteropelvic junction obstruction is usually of low grade and resolves spontaneously after pyeloplasty, whereas pseudo ureteropelvic junction obstruction and obstruction secondary to high grade reflux usually present with a dilated ureter that is easily detected on real-time ultrasonography. We assessed the role of voiding Cystourethrography in children with ureteropelvic junction obstruction by retrospectively evaluating the incidence and natural history of coexisting vesicourethral reflux.Materials and Methods: We reviewed the records of 106 children younger than 15 years who underwent pyeloplasty for ureteropelvic junction obstruction at our hospital between January 1990 and December 1998. A patient who had initially undergone antireflux surgery later underwent pyeloplasty for newly developed secondary obstruction...
Luis H Braga - One of the best experts on this subject based on the ideXlab platform.
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bilateral epididymitis in a child with undiagnosed posterior urethral valves
Urology, 2013Co-Authors: Justin Kwong, Armando J Lorenzo, Jorge Demaria, Luis H BragaAbstract:Posterior urethral valves are most commonly detected in the early neonatal period, the diagnosis often antenatally suspected from ultrasound findings. Nevertheless, some cases might go undetected and become manifest later in life with lower urinary tract symptoms. We describe the unusual case of a 5-year-old boy with a 2-month history of bladder distension, urinary dribbling, and epididymitis. Cystourethrography revealed posterior urethral valves with reflux into the seminal vesicles, vas deferens, and epididymis, bilaterally. A review of the published data is provided in the context of this unusual presentation pattern.
Philippe E. Zimmern - One of the best experts on this subject based on the ideXlab platform.
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radiation exposure during standing voiding Cystourethrography in women
Urology, 2006Co-Authors: Gary Arbique, Jason Gilleran, Jeffrey B Guild, Joan E Harris, Christine I Poon, Philippe E. ZimmernAbstract:Abstract Objectives To calculate the total radiation exposure and effective organ doses from standard protocol voiding Cystourethrography (VCUG). Methods A prospective series of consecutive, non-neurogenic women underwent a standardized VCUG protocol by the same technologist using a Siemens Sireskop Fluorospot radiographic/fluoroscopic unit. Only studies that followed the protocol were included. The effective dose was calculated using a commercially available dose-modeling program (PCXMC, version 1.5) for risk assessment. Results A total of 119 studies in 118 women (mean age 60 ± 13 years, range 30 to 93) were included. Only 15 patients (13%) were premenopausal with in situ reproductive organs. The mean number of images and fluoroscopic time per study was 12.8 ± 1.4 (lateral images 7.5 ± 1.3) and 35.8 ± 11.2 seconds, respectively. The mean effective dose for a single VCUG study was calculated to be 4.3 mSv, of which 26% was from fluoroscopy (1.1 mSv). The dose to the gonads accounted for 50% of the total effective organ dose. Using whole population radiologic risk factors, the total risk detriment, cancer and hereditary, was about 3 per 10,000 patients or a 99.997% chance of no detriment incurred from the study. The genetic and malignant risks were reduced in this cohort of patients, who were older, with most (87%) having no reproductive potential. Conclusions Using a standard protocol for adult women, a VCUG study is associated with an acceptable radiation risk.
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contrast media reactions during voiding Cystourethrography or retrograde pyelography
Urology, 1993Co-Authors: Donald L Weese, Harvey M Greenberg, Philippe E. ZimmernAbstract:Abstract Contrast media can be absorbed across the urothelium in amounts sufficient to cause severe anaphylactoid reactions. We report 2 cases of anaphylactoid reactions during voiding Cystourethrography (VCUG) or retrograde pyelography (RGP). A retrospective review of 783 consecutive VCUGs or RGPs performed at our institution over the last five years revealed no other systemic contrast media reactions. Although our findings and a review of the literature discloses that the incidence appears to be extremely low, urologists and radiologists need to be aware that an anaphylactoid or vagal contrast medium reaction may develop during VCUGs or RGPs. In addition, these physicians need to be prepared to treat a reaction should one occur.
William W. Bonney - One of the best experts on this subject based on the ideXlab platform.
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Voiding Cystourethrography in female stress incontinence.
AJR. American journal of roentgenology, 1996Co-Authors: Retta E. Pelsang, William W. BonneyAbstract:The aims of this study were to determine the sensitivity of voiding Cystourethrography (VCUG) in detecting incontinence in women with a history of leakage, the positive and negative predictive values of VCUG for stress incontinence, and how often a history of leakage is accompanied by urethrocele on VCUG and to correlate urethral anatomic measurements with the presence of urethrocele and stress incontinence on VCUG.A total of 159 women with incontinence or voiding dysfunction were evaluated by VCUG and urodynamic study (UDS).VCUG detected stress incontinence in 76% of women with a specific history of stress incontinence. Of 61 women with genuine stress incontinence proven on UDS, only 37 (61%) were identified on VCUG, yielding a positive predictive value of 56%. Twenty-one of 29 women without genuine stress incontinence on UDS but with apparent stress incontinence on VCUG had detrusor instability on UDS, so that urge incontinence was falsely diagnosed as stress incontinence. VCUG had a negative predictive...
John M Hutson - One of the best experts on this subject based on the ideXlab platform.
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voiding Cystourethrography in boys does the presence of the catheter obscure the diagnosis of posterior urethral valves
American Journal of Roentgenology, 1995Co-Authors: Michael Ditchfield, J D Grattansmith, J F De Campo, John M HutsonAbstract:In voiding Cystourethrography, the urethral catheter may or may not be left in place during voiding. The main argument for removing the catheter is that the diagnosis of posterior urethral valves may be missed because the catheter can hold open the valve, efface it, and render it invisible. However, if the catheter does not prevent the diagnosis of urethral disease, it is preferable to leave it in place. The catheter makes it possible to repeat the procedure easily if necessary, and using it to drain the bladder provides information about ureteric obstruction in the presence of vesicoureteric reflux. Accordingly, the purpose of this study was to determine whether leaving the urethral catheter in place throughout voiding Cystourethrography affects the efficacy of the procedure for the diagnosis of posterior urethral valves.Three radiologists reviewed the preoperative voiding cystourethrograms obtained in 48 boys who ranged in age from 1 day to 10 years old (mean, 1.5 years). All patients had a diagnosis of...
