Stress Urinary Incontinence Diagnosis
A 50-year-old woman, para 4, reports involuntary loss of urine while running and when she sneezes. She denies urgency, nocturia or dysuria. Urinalysis shows no leukocytes or nitrites, and post-void residual volume is 25 mL. Which of the following is the most appropriate next clinical evaluation to confirm the diagnosis?
- A.Q-tip test
- B.Uroflowmetry
- C.Cough stress testCorrect
- D.Bonney test
Explanation
Leakage triggered by running, coughing or sneezing is urine loss on effort or exertion, which defines stress urinary incontinence. The confirmatory bedside manoeuvre is the cough stress test: with a comfortably full or retrograde-filled bladder the patient coughs while the clinician observes the urethral meatus, and instantaneous leakage synchronous with the cough confirms the diagnosis. It is quick, non-invasive, needs no equipment and can be done at the first visit. The essential preliminary steps, already completed here, are excluding infection with urinalysis and excluding overflow incontinence with a post-void residual, both of which are normal. The Q-tip test measures urethral hypermobility by the angle change on straining, which informs surgical planning rather than establishing the diagnosis. The Bonney test elevates the bladder neck digitally to predict response to suspension surgery and is an older, less reliable adjunct. Uroflowmetry characterises voiding rate and is aimed at obstruction or a hypocontractile detrusor, neither of which is suggested here. Formal multichannel urodynamics is reserved for mixed or unclear symptoms, prior failed surgery, or when the history and cough test do not agree. First-line treatment once confirmed is supervised pelvic floor muscle training with weight reduction.
Why each option
- A.
- The Q-tip test assesses urethral hypermobility and is used after stress incontinence is suspected to help select surgery, not to establish the diagnosis.
- B.
- Uroflowmetry evaluates voiding flow patterns and is useful for obstructive or neurogenic bladder symptoms, which this woman does not have.
- C.
- Correct. The cough stress test directly demonstrates leakage coincident with a rise in intra-abdominal pressure and confirms stress urinary incontinence at the bedside.
- D.
- The Bonney test involves digital elevation of the bladder neck to predict surgical benefit and is an older, more invasive adjunct performed after the diagnosis is made.
Reference: ACOG Practice Bulletin No. 155 (reaffirmed 2023), Urinary Incontinence in Women; UpToDate 2025, Evaluation of female urinary incontinence
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