Perioperative Management of Anticoagulants and Antiplatelets

Elective Surgery

The American Society of Anesthesiologists recommends discontinuing clopidogrel 5-7 days before elective surgery to minimize bleeding risk, with the exact timing depending on the type of surgery and the patient's thrombotic risk 1, 2
For patients undergoing elective CABG/Cardiac Surgery, the American Heart Association suggests stopping clopidogrel 5-7 days before surgery 3
In patients undergoing Neurosurgery/Intracranial Surgery, Spinal Surgery, or Posterior Chamber Eye Surgery, the American Society of Anesthesiologists recommends stopping clopidogrel 5 days before the procedure 1

For patients with Bare Metal Stents placed within 4-6 weeks, the American College of Cardiology recommends delaying elective surgery if possible 1
For patients with Drug-Eluting Stents placed within 6 months, the American College of Cardiology suggests delaying elective surgery if possible 1

In cases of emergency surgery where clopidogrel cannot be discontinued, the European Society of Cardiology recommends proceeding with surgery while on clopidogrel with heightened awareness of bleeding risk 4
For urgent surgery, the American Heart Association suggests that more urgent surgery may be performed by experienced surgeons if the incremental bleeding risk is considered acceptable 3

The European Heart Journal recommends discontinuing enoxaparin 12 to 24 hours before cataract surgery to balance bleeding and thrombotic risks 5
For patients requiring bridging therapy after stopping warfarin, the last dose of Low Molecular Weight Heparin (LMWH) should be administered at least 12 hours before the procedure, as per the European Heart Journal guidelines 5
Enoxaparin can typically be resumed 24 hours postoperatively for low bleeding risk procedures like cataract surgery, according to guidelines that may align with those from societies like the American College of Cardiology, though specific guidance is from the journal Blood 6
If the patient is at high risk for thromboembolism, consider a reduced initial dose of enoxaparin when resuming anticoagulation, as suggested by guidelines that could be supported by the American Heart Association, though specific guidance is from the journal Blood 6

The American College of Chest Physicians (ACCP) recommends continuing apixaban without interruption for patients undergoing cataract surgery, which is classified as a minimal-bleed-risk procedure, with a strength of evidence supporting this recommendation 7, 8
Direct Oral Anticoagulants (DOACs) like apixaban may be continued without interruption for minimal-bleed-risk procedures, according to the ACCP guidelines 8
The American College of Chest Physicians (ACCP) recommends continuing antiplatelet therapy throughout the perioperative period for cataract surgery, as the minimal bleeding risk is outweighed by the potential thromboembolic risks of discontinuation 7, 9, 10, 11, 5
Aspirin should be continued throughout the perioperative period for patients undergoing cataract surgery, with the risk of bleeding considered minimal and rarely clinically significant 9, 7
Clopidogrel can be continued for cataract surgery, and for patients on dual antiplatelet therapy, the ACCP suggests continuing ASA and potentially interrupting the P2Y12 inhibitor if there are significant bleeding concerns 7
For patients on dual antiplatelet therapy (aspirin plus clopidogrel) with stents placed within the last 6-12 weeks, both antiplatelet agents should be continued during cataract surgery to minimize the risk of thromboembolic events 8

Patients with impaired renal function may require longer discontinuation periods due to delayed clearance of enoxaparin, though specific guidance on this population is not directly cited from a major guideline society in the provided text 5
For patients at high risk of thromboembolism, consider bridging with unfractionated heparin (UFH) if necessary, as recommended by the European Heart Journal guidelines 5
If clopidogrel is interrupted for any reason, it should be resumed within 24 hours after surgery to reduce the risk of thromboembolic complications 8
When resuming clopidogrel at the standard maintenance dose (75 mg/day), it takes 5-10 days to attain maximal platelet function inhibition, highlighting the importance of timely resumption 9
A loading dose (300-600 mg) can achieve maximal inhibition within 12-15 hours if rapid effect is needed, providing an alternative strategy for managing patients at high risk of thromboembolic events 9

General medical practice recommends adjusting insulin doses on the day of surgery based on fasting status, continuing most antihypertensive medications, and continuing systemic corticosteroids at usual dose 9
Specific adjustments include reducing morning dose of long-acting insulin by 25-50% based on fasting status, continuing most antihypertensive medications on the day of surgery, and continuing systemic corticosteroids at usual dose 9
The American College of Chest Physicians recommends continuing anticoagulation for high-risk patients, such as those with mechanical heart valves or high-risk atrial fibrillation 9, 5

Topical or intracameral anesthesia is preferred over injectable anesthesia for patients on anticoagulants/antiplatelets 9
Laboratory monitoring of antiplatelet therapy (platelet function testing) is not routinely recommended before cataract surgery, as the benefits of monitoring do not outweigh the risks 8

Cataract surgery is classified as a minimal-bleed-risk procedure with a 30-day risk of major bleeding of approximately 0%, similar to minor dermatologic procedures, pacemaker or cardioverter-defibrillator implantation, and minor dental procedures 8
The 2022 American College of Chest Physicians (ACCP) guidelines specifically list ophthalmologic (cataract) procedures as minimal-bleed-risk surgeries where anticoagulation can be continued, with a strength of evidence supporting this recommendation 7, 8
For patients with extremely high bleeding risk factors or surgeon preference, if clopidogrel must be interrupted, the 2022 ACCP guidelines suggest stopping it 5 days before surgery, rather than the traditional 7-10 days 8
For patients on warfarin with an elevated INR (>3.0), consideration should be given to postponing surgery until the INR is within the therapeutic range, as recommended by European guidelines 5