A 65-year-old client takes chronic warfarin for atrial fibrillation and had an embolic stroke 2 months ago. Before elective hip replacement, the perioperative team has prescribed LMWH bridging after an individualized high-thromboembolic-risk assessment. Which nursing actions are appropriate? Select all that apply.
Select All That Apply
Choose your responses, then check the answer.
Explanation
Current guidance recommends against routine heparin bridging for most clients with atrial fibrillation because bleeding risk usually outweighs benefit. This scenario explicitly states that the perioperative team selected bridging after individualized assessment of a recent embolic stroke. When bridging is ordered, stop warfarin about 5 days before surgery and follow the ordered INR target (Choice 4). Administer enoxaparin correctly without aspiration or massage (Choice 2). Hold therapeutic LMWH at least 24 hours before surgery and communicate the last-dose time; prophylactic dosing commonly uses a shorter interval per protocol (Choice 5). Do not continue warfarin through surgery with added LMWH (Choice 6), do not assume warfarin clears in 24 hours (Choice 3), and restart therapeutic anticoagulation only after adequate hemostasis and according to procedural bleeding risk (Choice 1).
Perioperative Bridging Anticoagulation 1. Risk stratification: bridge moderate-high VTE/AFib stroke risk; not low risk 2. Warfarin hold: stop ~5 days preop; daily INR until <1.5 3. LMWH bridge: therapeutic enoxaparin SC starts ~3 days preop 4. Last LMWH dose: hold ≥24 hr preop (therapeutic) or ~12 hr (prophylactic) 5. Postop resumption: 24-72 hr based on hemostasis + bleeding risk
SC LMWH Technique - Site: abdomen (anterolateral, 2 inches from umbilicus) - Rotate sites with each dose - Do NOT aspirate or massage — risk of hematoma - 90° angle; pinch fold of skin
Common Pitfalls - Continuing warfarin to OR morning + adding LMWH (over-anticoagulation) - Stopping anticoagulation 24 hr before surgery without bridging (thromboembolism) - Full-dose immediate postop resumption (hemorrhage)
Memory Tip "5-3-1: 5 days off warfarin, 3 days bridge LMWH, 1 day (24 hr) hold last LMWH"
Scenario65 yo, chronic warfarin (AFib), planned hip replacement in 5 days, on enoxaparin bridge.
Bridging TimelineDay -5: stop warfarinDay -4 to -3: continue daily INR; start LMWH when INR dropsDay -3 to -1: full therapeutic enoxaparin SCDay -1 (≥24 hr preop): hold last therapeutic LMWHDay 0: surgeryDay +1 to +3: restart anticoagulation based on hemostasis
SC Enoxaparin- Abdomen, rotate sites- 90° pinch fold; do NOT aspirate or massage
Avoid- Stacking warfarin + LMWH to OR morning- 24-hr abrupt discontinuation without bridging- Immediate full-dose PACU resumption
Bridging Anticoagulation — Perioperative strategy in moderate-to-high thromboembolic risk clients on chronic warfarin: warfarin is held while short-acting parenteral anticoagulation (typically therapeutic LMWH such as enoxaparin) covers the gap. Indicated for AFib with elevated CHA2DS2-VASc, mechanical heart valves, recent VTE. Reduces thromboembolism while warfarin effect is reversed for surgery.
Subcutaneous LMWH (Enoxaparin) Administration — Subcutaneous injection technique: anterolateral abdomen 2 inches from umbilicus, rotate sites, 90° pinch-fold technique, do NOT aspirate, do NOT massage after injection. Common adverse effects: bleeding, hematoma, heparin-induced thrombocytopenia (HIT — monitor platelet count). Dose: prophylactic 40 mg SC daily; therapeutic 1 mg/kg SC q12h or 1.5 mg/kg SC daily.
Perioperative Anticoagulation Timing — Standard timing: stop warfarin ~5 days preop with daily INR until <1.5; start LMWH bridge ~3 days preop; hold last therapeutic LMWH ≥24 hr preop (~12 hr if prophylactic dose) and document exact timing for the surgical team. Postoperative resumption is delayed 24-72 hr depending on hemostasis and surgical bleeding risk; therapeutic dosing is not given immediately in the PACU.