Which voiding position is associated with lowest flow rates in healthy adult men? role of natural voiding position

Abstract

Uroflow parameters were higher in standing and squatting positions compared to sitting in individuals not accustomed to void in sitting position. Therefore, uroflowmetry should not be performed in a position the individual is not familiar with.

Urinating Standing versus Sitting: Position Is of Influence in Men with Prostate Enlargement. A Systematic Review and Meta-Analysis

“…A total of 69 abstracts were identified, 27 relevant publications were assessed in full-text for eligibility. Eleven studies [3], [7], [8], [14], [18], [26], [28], [30]–[33] fulfilled the inclusion criteria and were included in the meta-analysis (table 1). A snowball search of the references in these 11 articles did not yield additional articles.…”

“…A total of 800 participants were included, with the number of participants in individual studies ranging from 20 to 200. In five studies [3], [7], [26], [31], [33] only healthy men were included, in four studies [8], [14], [18], [28] only patients with LUTS, and in two studies [30], [32] both groups were studied. For studies with healthy participants all seven [3], [7], [26], [30]–[33] investigated Qmax, four measured TQ [3], [7], [26], [31], and four studies [3], [26], [30], [31] measured PVR.…”

“…For adequate outcome assessment, total bladder capacity should have been measured and the technique used for the assessment of urodynamic parameters should have been described. To ensure a valid comparison between standing and voiding position, voiding conditions should have been standardized and the following variables should have been taken into account: the influences of (1) the setting for the measurements (in a private, non-observed clinical setting, in an observed clinical setting or at home [21]), (2) the circadian rhythm [22], (3) the time since last ejaculation [23] and (4) defecation [5], [18], (5) changes in intra-abdominal pressure [24], [25], and (6) the accustomed voiding position [6], [8], [11], [14], [18], [26]–[28] on urodynamics.…”

Erratum/Apology: Re: Uroflowmetry in healthy women: Development and validation of flow – volume and corrected flow – age nomograms

“…Consistency of repeated measurements has been reported in various studies, including the one by Prof. Haylen et al 14 and us too. 15 Similarly, as nicely depicted by Prof Haylen et al 14 there is remarkable consistency of centile ranking of repeated voids, therefore, negating its importance in construction and validation purpose for nomograms.…”

The effect of alpha blockers on uroflowmetric parameters in different voiding positions

“…The best position for emptying the bladder is controversial and not yet established. [7][8][9][10][11][12][13][14][15][16][17][18][19] There are no studies which assess the effects of alpha blockers on PVR volumes in different voiding positions. We evaluated the effect of the sitting and standing voiding positions on uroflowmetric parameters and PVR in patients over 50 years old and with LUTS due to BPH.…”