Using a suprapubic transducer position the urinary bladder is located and centered on the screen the width and anteroposterior dimensions are traditionally measured with the probe in a transverse orientation. Purpose: We report intra-individual variability, related factors and the normal reference value of post-void residual urine in children. The post-void residual may be formally measured using one of several proposed formulae, or (more commonly at the point of care) semi-quantified into abnormally elevated and normal. Urinary retention is noted with increased post-void residual on sonographic or voiding studies. Chronic urinary retention is a common presentation in men in primary care.

elevated values suggestive of obstructive uropathy.

in the presence of an abnormal or worsening renal function.

• particularly for etiologic differentiation of incontinence Bladder volume/post-void residual Use calc mode and measure in 3 dimensions (anterior posterior, right left, and superior inferior) Normal PVR is <50mL, <100mL in patients >65.

in the presence of lower urinary tract symptoms The post-void residual (PVR) urine test measures the amount of urine left in the bladder after urination.compression of the efferent sacral nerve roots (S2-4) may decrease one's ability to voluntarily contract the detrusor, resulting in an elevated post-void residual.in the presence of back pain or neurologic deficits evoking concern for a myelopathy.Use of this measurement is of some utility in several distinct groups of patients, including the following: Variability, related factors and normal reference value of post-void residual urine in healthy kindergarteners.

Post void residual normal