![]() However, some problems may occur even during a simple procedure, such as UF with PVR measurement using USG, in children. USG reliability and compatibility with PUS have been investigated in several studies (8-10). ![]() It is quick, non-invasive, and well-tolerated, which may be performed in-office setting, requires less patient cooperation, and necessitates no extra instruments. The use of USG to assess the bladder volume was first described in 1967 (7). Currently, a standard suprapubic USG or portable ultrasonic scanner (PUS) is used for this purpose. The only non-invasive tool for measuring urine volume in the bladder is USG. However, because of its invasive nature, it is not practical especially in those undergoing several repeating evaluations (5,6). Invasive tools, such as urodynamics, cystography, and cystoscopy, are indicated in a small selected group of cases (2,3).īladder catheterization is the “gold standard” method for accurate bladder or PVR volume measurement (4). In the majority of cases, treatment response evaluation, diagnosis, and monitoring can be done by non-invasive methods, such as voiding diary, symptom scoring questionnaires, urinalysis, ultrasonography (USG), and uroflowmetry (UF) with post-void residual (PVR) volume measurement. Lower urinary tract dysfunction (LUTD) has a varying prevalence of approximately 17-22% in the pediatric population (1). We concluded that PUS in standing position can be used to detect pre-voiding and post-voiding (PVR) volumes in UF procedure to prevent time-wasting and avoid possible anxiety of the children. ![]() ![]() In our study, measurements by PUS in both standing and supine positions were highly correlated. We hypothesized measuring urinary volume in bladder in standing position first would probably be time-saving in PVR volume measuring process. Various portable ultrasonic scanner (PUS) devices are used for this purpose. Post-void residual (PVR) volume measurement using ultrasonograpy is an important non-invasive tool used for diagnosis and monitoring the response to treatment in children with lower urinary tract dysfunction. What’s known on the subject? and What does the study add? Keywords: Portable ultrasonic scanner, uroflowmetry, post-void residual urine Measurements of BV before uroflowmetry or PVR volume by PUS in standing position gave similar results with those in the supine position. The BV and PVR measurements by PUS in standing and supine positions in group-3 were highly correlated, revealing that PUS can be used in both positions. The measurements of volumes infused by urodynamic device and PUS were similar in group-2 that revealed the agreement of PUS measurements on different volumes and highly correlated at the 25 th and very highly correlated at the 50 th, 75 th, and 100 th percentiles of the estimated bladder capacity related to age. ![]() The catheter and PUS measurements were similar in group-1 (Wilcoxon signed-rank test, p=0.976) and were highly correlated (r=0.873). Coefficients were interpreted as 0.90-1.00 (very high correlation) and 0.70-0.90 (high correlation). Following the agreement, correlations were analyzed using Pearson’s or Spearman’s coefficients depending on whether variables were distributed normally or not, respectively. In groups 1 and 2, PUS measurement agreements were evaluated using the paired sample T or Wilcoxon signed-rank tests. Additionally, the third group (group-3) was created to analyze the correlation between PUS measurements in different positions. infused volume during the urodynamic study) to evaluate the agreement of PUS measurements with true bladder volume. Two groups were composed (group-1: PUS vs. This study aimed to compare the pre-voiding bladder and post-voiding residual volumes measured by the portable ultrasonic scanner (PUS) in standing and supine positions. ![]()
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