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The urine volume is measured (this shows how efficiently the bladder empties). High volumes (180 ml) may be associated with urinary tract infections. [5] A volume of greater than 50 ml in children has been described as constituting post-void residual urine. [6] High levels can be associated with overflow incontinence.
A post-void residual urine greater than 50 ml is a significant amount of urine and increases the potential for recurring urinary tract infections. [citation needed] In adults older than 60 years, 50-100 ml of residual urine may remain after each voiding because of the decreased contractility of the detrusor muscle. [7]
Without diagnostic evaluation, the cause of underactive bladder is unclear, as there are multiple possible causes. UAB symptoms can accurately reflect impaired bladder emptying due either to DU or obstruction (normal or large storage volumes, elevated post-void residual volume), or can result from a sense of incomplete emptying of a hypersensitive bladder (small storage volumes, normal or ...
A 2014 meta-analysis found that, for elderly males with LUTS, sitting to urinate meant there was a decrease in post-void residual volume (PVR, ml), increased maximum urinary flow (Qmax, ml/s), which is comparable with pharmacological intervention, and decreased the voiding time (VT, s). [19]
Measurement of post-void residual by medical ultrasound is an easy procedure that is sufficient in most cases. Patients with this condition presenting additionally with hydronephrosis , stage 3 chronic kidney disease , or recurrent urinary tract infection or urosepsis were considered as high risk groups.
Voiding position when urinating may influence urodynamic parameters (urinary flow rate, voiding time, and post-void residual volume). [62] A meta-analysis found no differences between the standing and sitting positions for healthy males, but that, for elderly males with lower urinary tract symptoms, voiding in the sitting position-- [63]
Residual volume, air remaining in the lungs after a maximal exhalation; see lung volumes Residual volume, urine remaining in the bladder after voiding; see urinary retention Gastric residual volume (GRV) is the volume of food or fluid remaining in the stomach at a point in time during enteral tube nutrition feeding .
Post-void residual volume, the amount of urine retained in the bladder after a voluntary void; Proliferative vitreoretinopathy, an eye disease; Pulmonary vascular resistance, a type of resistance that must be overcome to create blood flow; Petrol vapour recovery, a type of vapor recovery