Vault prolapse surgery — structured SAQ (15 marks)

(a) Failing level and apical priority (3 marks)

One mark for the level, two for the apical-priority rationale. ^[2]

• Level I (apical suspension) failure. The vault is prolapsed (C plus 2), which is loss of the Level I cardinal and uterosacral (paracolpium) complex that suspends the upper vagina.^[2]
• Apical priority: DeLancey showed the paracolpium of Level I is the critical factor preventing vaginal eversion. An anterior or posterior repair done without restoring apical support recurs at the apex, because the unsupported apex drags the walls down again.^[2]
• For this woman with vault prolapse, the apex (vault) must be suspended as the primary procedure, with any anterior repair adjunctive.

(b) Sacrocolpopexy versus vaginal apical suspension (5 marks)

Two marks for sacrocolpopexy evidence, two for the vaginal/OPTIMAL evidence, one for the recommendation for this woman. ^[4]

• Laparoscopic sacrocolpopexy is the gold-standard apical repair. In the 2023 Cochrane review (59 RCTs, 6705 women), vaginal procedures had more awareness of prolapse than sacrocolpopexy (risk ratio 2.31, 95% CI 1.27 to 4.21), more repeat surgery (RR 2.33) and more prolapse on examination (RR 1.87). The comprehensive review (Nygaard 2004) reports apical success 78 to 100% with mesh erosion around 3.4%. The laparoscopic route shortens admission versus open and operating time versus robotic.^[4][8]
• Vaginal apical suspension (uterosacral or sacrospinous) avoids an abdominal operation and mesh and recovers faster, but carries higher apical recurrence. OPTIMAL showed uterosacral suspension and sacrospinous fixation were not significantly different at 2 years (ULS 59.2% vs SSLF 60.5%) or 5 years (surgical failure 61.5% vs 70.3%, adjusted difference minus 8.8%).^[5][6]
• For this woman — sexually active, continent, wanting the most durable repair — laparoscopic sacrocolpopexy is the defensible choice, accepting the mesh-consent conversation.^[4]

(c) OPUS and the occult-incontinence trade-off (4 marks)

One mark for the rationale, two for the numbers, one for the decision. ^[17]

• Rationale: reducing the prolapse unkinks the urethra and can unmask occult stress incontinence; a continent woman can return "cured of the lump but now leaking" if not screened.^[17]
• OPUS (NEJM 2012): in continent women undergoing vaginal prolapse surgery, a prophylactic midurethral sling reduced urinary incontinence at 12 months (27.3% vs 43.0%, p = 0.002), number needed to treat 6.3 — but with higher bladder perforation (6.7% vs 0%), UTI (31.0% vs 18.3%), major bleeding (3.1% vs 0%) and incomplete emptying at 6 weeks (3.7% vs 0%).^[17]
• Decision: a shared decision about which adverse event she accepts; the OPUS data are for vaginal prolapse surgery, so the threshold for a sling at sacrocolpopexy is individualised to her cystoscopy and urodynamics findings.

(d) Mesh distinction and consent (3 marks)

Two marks for the distinction, one for consent. ^[15]

• Distinction: transvaginal mesh (placed through the vaginal wall for prolapse) and sacrocolpopexy mesh (placed abdominally or laparoscopically against the vault and sacrum) are in different categories. Transvaginal mesh for primary prolapse has a mesh exposure rate around 11.8% (Yeung 2024) and was withdrawn; sacrocolpopexy mesh erodes in around 3.4% (Nygaard 2004) and remains the gold-standard apical repair.^[8][15]
• Consent: counsel specifically on mesh exposure, erosion into bladder or bowel, contraction with chronic pain, dyspareunia, and the chance of needing revision; document the consent and classify any complication with the IUGA and ICS category-time-site system.