Publications by authors named "Justin Y H Chan"
: Urinary tract infections (UTIs) are among the most prevalent bacterial infections. With many patients turning to the Internet as a health resource, this study seeks to understand public engagement with online resources concerning recurrent UTIs (rUTIs), assess their reliability, and identify common questions/concerns about rUTIs. : Social media analysis tool BuzzSumo was used to calculate online engagement (likes, shares, comments, views) with information on rUTIs.
View Article and Find Full Text PDFIntroduction: Vesicoureteral reflux (VUR) is commonly diagnosed in the workup of urinary tract infections or hydronephrosis in children. Traditionally, VUR severity is graded subjectively based on voiding cystourethrogram (VCUG) imaging. Herein, we characterized the association between age, sex, and indication for VCUG, by employing standardized quantitative features.
View Article and Find Full Text PDFObjective: To determine long-term kidney outcomes in boys with posterior urethral valve (PUV) undergoing either primary valve ablation or urinary diversion with matched baseline kidney function.
Methods: After retrospective review of patients managed for PUV at our institution, propensity score matched analysis was conducted using nadir serum creatinine with logistic regression analysis. Nearest neighbor matching was used to allocate boys to primary urinary diversion and primary ablation groups.
Article Synopsis
- This study investigates the characteristics of young patients with renal cell carcinoma (RCC) and examines the role of nephron-sparing surgery (NSS) in their treatment.
- Researchers reviewed 16 studies involving 119 patients who underwent partial nephrectomy (PN) and 559 who had radical nephrectomy (RN), finding a high survival rate but limited data on long-term kidney outcomes.
- The findings suggest NSS is a viable option for certain patients, but the overall quality of studies is low, highlighting the need for more rigorous research to better assess the benefits and risks of NSS in this group.
Article Synopsis
- Vesicoureteral reflux grading is subjective and has low reliability, prompting research into improving it through machine learning focused on features like ureteral tortuosity and dilatation.
- A total of 1,492 kidneys and ureters were analyzed through voiding cystourethrograms, revealing low inter-rater reliability and confirming that higher measured features correlate with higher reflux grades.
- The machine learning model qVUR demonstrated improved reliability and accuracy in grading reflux, outperforming traditional methods by 3.6-fold, and showed consistent performance across multiple data sets.
Objective: To compare the health-related quality of life (HRQOL) of patients with residual fragments after surgical intervention for kidney stones to patients that are stone-free using the disease-specific Wisconsin stone quality of life (WISQOL) questionnaire. Kidney stones contribute to impaired HRQOL, which is increasingly recognized as an important healthcare outcome measurement.
Materials And Methods: With institutional review board approval, 313 adult patients who underwent surgical intervention for kidney stones at 4 sites completed a WISQOL questionnaire.
Acquisition costs and prohibitively expensive technical support for endoscope maintenance, repair, and reprocessing have deterred adoption of flexible cystoscopes by many urologists internationally. This study evaluated the performance of a novel single-use digital cystoscope that can directly connect to a laptop or computer monitor for visualization, obviating the need for a tower. The performance characteristics of flexible single-use cystoscopes (NeoScope) were prospectively evaluated a reusable flexible cystoscope (Olympus) in three clinical cases and two independent benchtop testing episodes in Canada.
View Article and Find Full Text PDFPurpose Of Review: Treatment of Peyronie's disease with collagenase Clostridium histolyticum (CCh) has gained world-wide adoption following the phase III clinical trials IMPRESS I and II. However, the optimal treatment parameters remain largely unknown. Many groups have made modifications to CCh treatment in Peyronie's disease in recent years.
View Article and Find Full Text PDFCurrent American Urological Association guidelines recommend ureteroscopy (URS) as primary management of distal ureteral stones and shock wave lithotripsy (SWL) as a secondary option. Utilization of SWL in the management of nephrolithiasis in North America has decreased. We hypothesized that SWL continues to be an effective option in the management of distal ureteral calculi and studied data from our center in patients who received SWL for distal ureteral stones.
View Article and Find Full Text PDFArticle Synopsis
- Flexible ureteroscopy is a critical tool for urologists, transitioning from reusable to single-use ureteroscopes in recent years.
- Single-use ureteroscopes, like LithoVue and Uscope, aim to solve issues of cost and maintenance linked to reusable options.
- The review offers insights into various available single-use and semirigid ureteroscopes, focusing on their features like deflection, irrigation, and optical properties.