Approach to Evaluating Bladder Disorders

Initial Evaluation

The American Urological Association recommends obtaining a comprehensive assessment of bladder symptoms, including storage symptoms and emptying symptoms, to distinguish between obstructive and non-obstructive conditions 1
A comprehensive history should document duration and baseline symptom levels to determine the complexity of presentation, and review current medications that may affect bladder function 3
The initial evaluation should include a physical examination, such as an abdominal examination to assess for distension or tenderness, and a rectal/genitourinary examination to evaluate prostate size in men and pelvic organ prolapse in women 3
Urinalysis to rule out UTI and hematuria is mandatory for all patients, and post-void residual (PVR) measurement should be performed in patients who spontaneously void 1, 4

Validated symptom questionnaires, such as OAB-specific questionnaires or the LURN-SI-29/10, can be used to quantify bladder symptoms and bother 2, 5
A 24-72 hour fluid intake and voiding diary can provide objective data on voiding patterns and help distinguish between OAB and nocturnal polyuria 2, 5

Urodynamics, cystoscopy, and urinary tract imaging should not be routinely performed in the initial evaluation of uncomplicated bladder disorders, but may be considered when diagnostic uncertainty exists 5
Advanced testing, such as urodynamic studies, can provide an objective assessment of bladder and urethral function during filling and voiding phases, and can identify detrusor overactivity, underactive detrusor, or bladder outlet obstruction 4
Cystoscopy can be helpful for evaluating hematuria, recurrent UTIs, or obstructive symptoms, and can identify bladder stones, tumors, or anatomical abnormalities 2, 5

Risk stratification is essential for patients with suspected neurogenic bladder, and can be categorized into low-risk, moderate-risk, and high-risk patients 4, 6
Low-risk patients do not require routine upper tract imaging, renal function assessment, or urodynamics, while moderate-risk and high-risk patients require more frequent monitoring and testing 6
Antimuscarinic medications should be used with caution in patients with PVR 250-300 mL 7