Continue Aspirin Through Surgery
For a patient on 81 mg aspirin daily for secondary stroke prevention, aspirin should be continued perioperatively for arthroscopic knee surgery without interruption. 1
Rationale Based on Guidelines
The most authoritative guidance comes from urological practice guidelines that directly address this scenario: "For patients on clopidogrel or aspirin for secondary stroke prevention, especially after a recent stroke, it is recommended to continue aspirin through the perioperative period." 1 While this is from urological literature, the principle applies universally to secondary stroke prevention across surgical specialties.
Key Supporting Evidence
Cardiovascular/stroke prevention guidelines consistently emphasize:
- Aspirin should be continued indefinitely after stroke/TIA for secondary prevention 2
- The 2007 ACC/AHA perioperative guidelines state that monotherapy with low-dose aspirin need not be routinely discontinued for elective noncardiac surgery 3
- Aspirin withdrawal increases risk of acute cardiovascular events, with cerebral events occurring at a mean of 14.3 ± 11.3 days after discontinuation 4
Bleeding risk in orthopedic surgery is acceptable:
- A prospective matched cohort study of 90 patients ≥50 years undergoing knee arthroscopy found zero complications (0%) requiring reoperation in patients continuing 81 mg aspirin, with no difference in hematoma formation, ecchymosis, or patient outcomes compared to controls 5
- Multiple studies in total joint arthroplasty (a higher-risk procedure than arthroscopy) demonstrate that low-dose aspirin does not increase surgical bleeding or transfusion requirements 6, 7, 8
Clinical Algorithm
Continue 81 mg aspirin daily through surgery if:
- ✓ Patient has history of stroke/TIA (your patient qualifies)
- ✓ Aspirin is for secondary prevention (your patient qualifies)
- ✓ Dose is ≤100 mg daily (your patient qualifies at 81 mg)
Do NOT stop aspirin because:
- The thrombotic risk of withdrawal (stroke recurrence) substantially outweighs the minimal bleeding risk in knee arthroscopy
- Arthroscopic knee surgery is considered low-to-intermediate bleeding risk
- Your patient's specific procedures (partial meniscectomy, possible microfracture, chondroplasty, plica excision) do not involve high-risk bleeding scenarios
Important Caveats
The only exception where aspirin discontinuation might be considered is intracranial neurosurgery, where guidelines recommend stopping aspirin 5 days preoperatively 9. Your patient's knee arthroscopy does not fall into this category.
Timing considerations:
- If aspirin were to be stopped (which is NOT recommended for your patient), it should be discontinued 3 days preoperatively for most surgeries 9
- However, for secondary stroke prevention, this creates unacceptable thrombotic risk 1, 4
Neurological consultation: While guidelines mention considering neurological consultation to evaluate competing risks 1, the evidence strongly favors continuation in your scenario. A consultation could be obtained if there are unusual circumstances (e.g., recent hemorrhagic transformation, extremely high bleeding risk features), but standard arthroscopic knee surgery does not warrant this.
Practical Management
- Continue 81 mg aspirin daily without interruption
- Ensure surgical team is aware patient is on aspirin
- Standard hemostatic techniques during surgery are sufficient
- No bridging therapy is needed or recommended 1
- Resume normal aspirin dosing immediately postoperatively (which means simply continuing it)
The evidence is clear: stopping aspirin for secondary stroke prevention before knee arthroscopy creates more risk than benefit. 1, 5, 4