What is a PAC Procedure and When to Restart Aspirin
A PAC (Posterior Anterior Colporrhaphy) procedure is a vaginal reconstructive surgery that repairs both the front and back walls of the vagina to correct pelvic organ prolapse, and aspirin should be restarted within 24 hours after the procedure at the usual maintenance dose.
Understanding the Procedure
The PAC procedure your patient underwent involves:
- Anterior colporrhaphy: Repair of the front vaginal wall (typically for cystocele/bladder prolapse)
- Posterior colporrhaphy: Repair of the back vaginal wall (typically for rectocele)
- This is a vaginal native tissue repair approach, commonly performed in elderly women with pelvic organ prolapse 1, 2
The procedure is safe and effective in elderly patients, with low complication rates even in women over 80 years old 3. In your 79-year-old patient, this represents standard-of-care surgical management for symptomatic prolapse.
When to Restart Aspirin
Resume aspirin within 24 hours post-procedure at her usual maintenance dose 4. This recommendation is based on the 2022 American College of Chest Physicians perioperative antithrombotic management guidelines.
Specific Timing Algorithm:
- Restart timing: Evening of surgery day or within 24 hours post-operatively
- Dose: Resume at her usual maintenance dose (typically 81 mg daily), NOT a loading dose 4
- Route: Oral administration when patient can tolerate oral medications
Key Considerations Before Restarting:
Check for these contraindications before resuming aspirin:
- Adequate hemostasis at the surgical site
- No active bleeding or expanding hematoma
- Patient able to take oral medications
- No anticipated need for additional immediate intervention
If any of these conditions are present, delay aspirin resumption and reassess daily 4.
Important Safety Context
Bleeding Risk Profile:
Recent data on POP surgery shows that single-dose preoperative pharmacologic thromboprophylaxis does not significantly increase bleeding complications in carefully selected patients 5. However, the evidence regarding postoperative aspirin continuation shows conflicting data, with one study suggesting increased bleeding complications with thromboprophylaxis 6, though this primarily addressed preoperative dosing patterns.
VTE Risk vs Bleeding Risk:
- VTE rates after POP surgery are low (approximately 0.5%) 5
- Bleeding complications after vaginal prolapse repair are also low (approximately 5.1% composite rate) 5
- The benefit of early aspirin resumption for cardiovascular protection typically outweighs bleeding risk in most patients
Common Pitfalls to Avoid:
- Don't delay unnecessarily: Unless there's active bleeding or inadequate hemostasis, delaying beyond 24 hours increases thrombotic risk without proven bleeding benefit
- Don't double the dose: Resume at maintenance dose only 4
- Don't confuse with P2Y12 inhibitors: If she were on clopidogrel or other antiplatelet agents, timing would differ (5-7 days preoperatively), but aspirin is typically continued perioperatively for most surgeries
Postoperative Monitoring:
Watch for:
- Voiding difficulty (occurs in 10.8% of elderly patients) 1
- Vaginal hematoma (rare, 0.6%) 1
- Signs of surgical site bleeding requiring intervention
The vaginal approach used in your patient has excellent outcomes with 89-95% anatomical success rates and low recurrence 1, 2, 7.