Study Medicine 📖🩺: post #2528 — TG.ME

🩸 Emergency surgery in APS patient on warfarin SLE + thrombotic antiphospholipid syndrome (APS) + pulmonary embolism 4 months ago = high perioperative thrombosis risk, but emergency laparotomy requires reliable hemostasis. 🚨 Before OR 🔹 Stop warfarin immediately. 🔹 Confirm current INR, CBC, fibrinogen, renal/liver function and last warfarin dose. 🔹 For immediate surgery with INR 2: 💉 4-factor PCC 25 IU/kg IV • Maximum 2,500 IU for INR 2–<4 • Dose according to local protocol/product ➕ Vitamin K 5–10 mg IV slowly for sustained reversal 🎯 Recheck INR approximately 30 minutes after PCC; commonly aim INR ≤1.5 before major abdominal surgery, according to surgical/anesthetic requirements. ⚠️ PCC acts rapidly but carries thrombotic risk—use only the required dose. ❌ Do not delay life-saving surgery waiting for vitamin K alone. ❌ Fresh frozen plasma is unnecessary when 4-factor PCC is available; consider it only if PCC is unavailable. 🛡️ Prevent postoperative thrombosis 🔹 Intermittent pneumatic compression immediately. 🔹 Start prophylactic UFH/LMWH once surgical hemostasis is secure—often within 12–24 hours. 🔹 Because thrombotic APS is high risk, escalate to therapeutic UFH/LMWH when bleeding risk permits—commonly 48–72 hours after major abdominal surgery, individualized with surgery/hematology. 🔹 UFH may be preferred if renal impairment, uncertain hemostasis or possible reoperation because it is short-acting and reversible. 🔹 Restart warfarin when enteral intake and hemostasis allow, overlapping with heparin until the INR is therapeutic. 🧠 APS pearl: Lupus anticoagulant may prolong aPTT; if UFH monitoring appears unreliable, use a validated anti-Xa assay. ✅ The principle: rapid, controlled warfarin reversal for surgery—then minimize time without anticoagulation. ❓ MCQ: Best immediate reversal for INR 2 before emergency laparotomy? A. Vitamin K alone B. FFP alone C. 4-factor PCC + IV vitamin K ✅ D. Platelet transfusion 🎭 OSCE: State the competing risks, stop warfarin, administer PCC plus vitamin K, verify INR, ensure mechanical prophylaxis, and establish a documented postoperative heparin/warfarin restart plan. References: 4-factor PCC prescribing information—DailyMed⁠, 2025 warfarin-reversal recommendations⁠, EULAR APS recommendations⁠ #APS #Warfarin #Anticoagulation #EmergencySurgery #Hematology