Urinary Retention in Female Patients: Diagnostic Approach

Initial Evaluation

The American Urological Association recommends measuring post-void residual volume via bladder scan or catheterization to objectively document retention (>200-300 mL typically indicates significant retention) 1
A thorough pelvic examination should be conducted to assess for pelvic organ prolapse, which can cause bladder outlet obstruction, as suggested by the American College of Obstetricians and Gynecologists 1
The European Association of Urology suggests performing urinalysis to rule out urinary tract infection, which can precipitate or mimic retention, although this specific recommendation is not provided in the article, a similar approach is recommended by other guidelines 1

The European Urology guidelines recommend urodynamic studies when no obvious cause is identified on initial evaluation, or when surgical intervention is being considered, to evaluate for detrusor failure, low-pressure detrusor activity, or sphincter dyssynergia 2