A 60-year-old postmenopausal woman presents with stress urinary incontinence (SUI). Urodynamic study confirms urodynamic stress incontinence (USI) with Valsalva leak point pressure (VLPP) of 45 cm H₂O. She has stage II anterior vaginal wall prolapse (POP-Q Aa +1, Ba +2). She has failed pelvic floor muscle training for 6 months. What does the VLPP measurement indicate and which surgical treatment has the highest long-term success rate for SUI in this context?

• A VLPP ≤60 cm H₂O indicates intrinsic sphincter deficiency (ISD); mid-urethral slings (retropubic TVT) have the highest long-term cure rates for SUI including ISD subgroup ✓
• B VLPP ≤60 cm H₂O indicates urethral hypermobility only; Burch colposuspension is superior to mid-urethral slings for hypermobility
• C VLPP of 45 cm H₂O indicates detrusor overactivity, requiring anticholinergics rather than surgery
• D VLPP ≤60 cm H₂O indicates intrinsic sphincter deficiency; bulking agents are first-line surgical treatment for ISD

Explanation

VLPP (Valsalva Leak Point Pressure) quantifies urethral sphincter function: VLPP ≤60 cm H₂O indicates intrinsic sphincter deficiency (ISD) — poor urethral coaptation regardless of urethral support; VLPP 60–90 cm H₂O is equivocal; VLPP ≥90 cm H₂O indicates urethral hypermobility as the primary mechanism. Despite ISD subgroup historically having lower cure rates with mid-urethral slings, multiple RCTs (TOMUS trial) and long-term data show that retropubic mid-urethral slings (TVT) achieve objective cure rates of 80–85% at 5 years even in ISD, superior to trans-obturator slings for ISD. Bulking agents have high recurrence rates and are reserved for women unfit for surgery.

Reference: Shaw's Textbook of Gynaecology, 17th ed.

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Written and medically reviewed by the StethoPrep medical team.