A nurse is providing discharge teaching to a 65-year-old client newly prescribed warfarin for atrial fibrillation. Which instructions should the nurse include? Select all that apply.
Select All That Apply
Choose your responses, then check the answer.
Explanation
Warfarin teaching emphasizes consistent vitamin K intake (not avoidance), bleeding precautions, and routine INR monitoring. NSAIDs and aspirin increase bleeding risk and should be avoided unless prescribed. Vitamin K supplementation antagonizes warfarin and is contraindicated.
Clinical Judgment Warfarin client teaching: consistent vitamin K diet, bleeding precautions, routine INR, avoid NSAIDs, MedicAlert ID. Therapeutic INR for atrial fibrillation: 2.0-3.0. Antidote: vitamin K (slow), 4-factor PCC (urgent). Many drug interactions — check before any new prescription.
Memory Tip Warfarin = consistent K diet + soft brush/electric razor + INR check + no NSAIDs
KR vs US AHA atrial fibrillation guidelines and Korean Society of Cardiology guidelines align: warfarin INR 2.0-3.0 for AFib. DOACs (apixaban, rivaroxaban) increasingly preferred over warfarin in non-valvular AFib. Korean tertiary cardiology clinics use the same INR target.
Clinical Practice GuideWarfarin client education bundle:- Consistent dietary vitamin K: about 90 mcg/day for women, 120 mcg/day for men. Eat the same amount of leafy greens daily; do not stop or start abruptly.- Bleeding precautions: soft toothbrush, electric razor, fall prevention, no contact sports, watch for bruising, melena, hematuria, gum bleeding- INR monitoring: weekly until stable, then every 4-6 weeks. Target 2.0-3.0 for AFib and DVT/PE; 2.5-3.5 for mechanical mitral valve- Drug interactions: NSAIDs, antibiotics, herbals (St. John wort, ginkgo), grapefruit juice — check before any new med- MedicAlert ID at all times- Hold for procedures per provider, often 5 days pre-op
CautionReversal: vitamin K 1-10 mg PO/IV for elevated INR; 4-factor PCC (Kcentra) plus vitamin K for major bleeding. Fresh frozen plasma is a slower secondary option. Do not use FFP alone if PCC is available.
Warfarin — Vitamin K antagonist that inhibits hepatic synthesis of clotting factors II, VII, IX, X. Used for AFib, mechanical valves, DVT/PE prevention and treatment. Monitored by INR. Therapeutic range 2.0-3.0 for most indications. Antidote: vitamin K and 4-factor PCC.
INR (International Normalized Ratio) — Standardized PT measure used for warfarin monitoring. Therapeutic 2.0-3.0 for AFib, DVT, PE; 2.5-3.5 for mechanical mitral valve. Below 2 = thrombosis risk; above target = bleeding risk. Frequency: weekly initially, every 4-6 weeks once stable.
Bleeding precautions — Standard teaching for clients on anticoagulants: soft-bristle toothbrush, electric razor, fall prevention, MedicAlert ID, no contact sports, monitor for bruising, melena, hematuria, gum bleeding, and severe headache.