Increasing Age Predicts Increasing Residual Urine Volume.

Area of Science:

• Urogynecology
• Pelvic Health
• Urology

Background:

• Establishing reference values for postvoid residual (PVR) is crucial for diagnosing bladder dysfunction in urogynecology.
• Previous studies have not comprehensively defined PVR reference ranges specific to a tertiary urogynecology referral population.

Purpose of the Study:

• To determine age-specific reference values for postvoid residual (PVR) volumes in patients referred to a tertiary urogynecology center.
• To identify patient characteristics associated with elevated PVR within this population.

Main Methods:

• Retrospective chart review of 361 new patients at a urogynecology referral center.
• Statistical analysis including Wilcoxon rank sum, Kruskal-Wallis tests, and multivariable logistic regression.
• Assessment of associations between PVR and demographics, symptoms, and physical examination findings.

Main Results:

• The median PVR was 20 mL, with higher volumes observed in older age groups.
• Significant risk factors for increased PVR included prolapse stage (OR 3.46), history of stroke (OR 7.62), narcotic use (OR 2.45), and urinary frequency (OR 2.61).
• Age-specific median PVR ranged from 10 mL (younger than 40) to 50 mL (older than 79).

Conclusions:

• Most patients evaluated in urogynecology have low PVR volumes, generally under 100 mL.
• PVR measurement is most valuable in patients with pelvic organ prolapse, urinary frequency, history of stroke, or those using narcotics.
• Age is a significant factor influencing PVR, necessitating age-specific reference values.