ABSTRACT
Purpose@#The aim of this study was to assess the performance of a mobile acoustic Uroflowmetry (UFM) application compared with standard UFM in the pediatric population. @*Methods@#A mobile acoustic UFM application represents a noninvasive method to estimate the urine flow rate by recording voiding sounds with a smartphone. Male pediatric patients who were undergoing UFM testing were prospectively recruited, and the voiding sounds were recorded and analyzed. The intraclass correlation coefficient (ICC) was used to compare the maximum flow rate (Qmax), average flow rate (Qavg), voiding time (VT), and voiding volume (VV) as estimated by acoustic UFM with those calculated by standard UFM. Differences in Qmax, Qavg, VT, and VV between the 2 UFM tests were determined using 95% Bland-Altman limits of agreement. @*Results@#A total of 16 male patients were evaluated. Their median age was 9 years. With standard UFM, the median Qmax, Qavg, VT, and VV were 18.7 mL/sec, 11.1 mL/sec, 15.2 seconds, and 157.8 mL, respectively. Strong correlations were observed between the 2 methods for Qmax (ICC=0.755, P=0.005), VT (ICC=0.974, P<0.001), and VV (ICC=0.930, P<0.001), but not for Qavg (ICC=0.442, P=0.135). The Bland-Altman plot showed good agreement between the 2 UFM tests. Flow patterns recorded by acoustic UFM and conventional UFM showed good visual correlations. @*Conclusions@#Acoustic UFM was comparable to standard UFM for male pediatric patients. Further validation of its performance in different toilet settings is necessary for broader use.
ABSTRACT
Purpose@#We aimed to document the time of onset of ultrasonographic and histologic changes in the testes of a rat model following testicular torsion. @*Methods@#Twenty-five Sprague-Dawley rats were divided into four groups. All animals underwent preoperative Doppler ultrasonography. Groups 1, 2, and 3 underwent unilateral surgical torsion of the testis lasting for 72, 24, and 6 hours, respectively. Group 4 underwent a sham operation. The animals were followed with Doppler ultrasonography at 6, 24, 48, and 72 hours postoperatively. Histologic examinations were performed at the designated final time point for each group. @*Results@#After torsion, enlargement of the epididymal head and thickening of the spermatic cord over time were noted. Based on the ultrasonographic dimensions, the ratio of the epididymal volume increased with time following torsion (p=0.002). The torsed testes had an average weight gain of 0.27 g at 6 hours compared to the control testes, but an average weight loss of 0.22 g at 72 hours (P=0.006). Changes in testicular echotexture were noted as soon as 6 hours after torsion, but there was no consistent pattern of echotexture change thereafter. Histologically, viable tubules were seen 6 hours after torsion, while extensive hemorrhagic necrosis was found at 72 hours. @*Conclusion@#In evaluating testicular torsion, the enlargement ratio of the epididymis and thickening of the spermatic cord on Doppler ultrasonography may be useful for determining the urgency of immediate surgery. Changes in testicular echotexture may not be a reliable indicator of the time of onset.
ABSTRACT
Over the past two decades, laparoscopic and robotic surgery in children has been described as a viable minimally invasive alternative to open surgery for many pediatric urologic conditions. With the goal of reducing the morbidity associated with open surgery, minimally invasive surgery in children is increasingly being performed as laparoscopic and robotic patients appear to be experiencing shorter hospital stays, decreased pain medication requirements, and the potential for improved cosmesis. This article provides an overview of the existing literature in laparoscopic and robotic-assisted laparoscopic urologic surgery in children. Laparoscopic and robotic-assisted laparoscopic surgery appears to be safe and effective in children for a wide range of ablative and reconstructive procedures. Conventional laparoscopic surgery is effective for ablative procedures, while robotic surgery may be ideally suited for reconstructive cases requiring advanced suturing and dissection. Overall, more prospective studies are needed to study the long-term outcomes of minimally invasive surgery in pediatric patients, and the appropriate use of the available technology.