A new nomogram of urinary flow rate and volume based on multiple measurements per healthy adult Japanese men using a portable uroflowmeter (P-Flowdiary®)

Abstract

Background To develop a nomogram of urinary volume and flow based on the data of Japanese men without lower urinary tract symptoms and multiple flows per participant whose characteristics were clear. Methods Overall, 101 Japanese male volunteers without lower urinary tract symptoms aged between 20 and 59 years were enrolled. A portable uroflowmeter (P-Flowdiary®) was used to record urinary information (flow rate and volume) for 2 successive days. The model (quadratic, linear, or logarithmic regression) most fit for the relationship between maximum flow rate and voided volume was determined. The maximum flow rate at > 150 mL was compared among the 20–29-, 30–39-, 40–49-, and 50–59-year age groups. Nomograms appropriate for the age groups were created. Results The mean age, International Prostate Symptom Score, and Overactive Bladder Symptom Score were 38.5 years, 0.42, and 0.24, respectively. The quadratic regression model was the most fit because its mean coefficient determination was 0.93 ± 0.06. The mean maximum flow rate was significantly lower in the 50–59-year age group (21.8 ± 5.05 mL/s, P < 0.01) than in the younger groups (24.14 ± 4.94, 24.05 ± 6.99, and 24.64 ± 5.72 mL/s). The 2 nomograms are Y = 28.99 {1 − exp(− 0.01 × X)} and Y = 25.67 {1 − exp(− 0.01 × X)} for the 20–49- and 50–59-year age groups, respectively. Conclusions The nomogram can predict maximum flow rate based on voided volume in Japanese men aged 20–59 years without lower urinary tract symptoms.

The design and evaluation of a quick checklist for urodynamic quality control: A prospective single‐center small sample study

“…Initially, a literature review was conducted to extract information on factors that facilitate and impede good urodynamic practice. The Pubmed, Web of Science, and Embase search engines were used with the following keywords: “urodynamic study,” “urodynamic study quality control,” “urodynamic study guidelines,” and “urodynamic artefacts.” Two different versions of UDS guidelines 15,16 and 15 studies on the UDS quality review in different regions 4,17–29 were included.…”

“…The Pubmed, Web of Science, and Embase search engines were used with the following keywords: "urodynamic study," "urodynamic study quality control," "urodynamic study guidelines," and "urodynamic artefacts." Two different versions of UDS guidelines 15,16 and 15 studies on the UDS quality review in different regions 4,[17][18][19][20][21][22][23][24][25][26][27][28][29] were included.…”

Reassessing Normal Voiding Standards: A Cross-Sectional Study Based on Medical Professionals’ Evaluations with Portable Uroflowmetry and IPSS

“…Uroflowmetry is typically performed in an outpatient setting at designated facilities, where individuals urinate into a uroflow meter, mostly at a scheduled time. This 'unnatural' voiding on demand with varying bladder capacities may lead to significant test variability, suggesting the need for repeated uroflowmetry measurements and possible multiple clinic visits [9,14]. This has propelled the development of portable (home) uroflowmetry, facilitating a more natural urinary flow recording [9,15].…”

A multicenter uroflowmetry study of healthy women in China

“…The HBU test provides a private and familiar environment that eliminates psychological and environmental influences on subjects. [2,3] Multivariate analysis revealed that age, VV, BMI, and eutocia were associated with the uroflow rate [Supplementary Table 3, http://links.lww.com/CM9/B973]. The correlation between age and uroflow rate remains controversial in current studies, but most studies have reached a consensus that uroflow decreases with age.…”

“…The HBU test provides a private and familiar environment that eliminates psychological and environmental influences on subjects. [ 2 , 3 ]…”