A 72-year-old client on chronic warfarin (target INR 2.0–3.0… | MyMerci
Adverse Effects/Contraindications/InteractionsPA
Question
A 72-year-old client on chronic warfarin (target INR 2.0–3.0) is brought to the ED after a fall down the stairs. The client has a large scalp laceration, decreased level of consciousness, and a head CT showing acute intracranial hemorrhage. Vital signs: BP 168/96, HR 102, RR 22. Stat INR is 3.8. Which set of orders does the nurse anticipate as the priority for urgent reversal?
1Hold warfarin and administer 4-factor prothrombin complex concentrate (PCC, Kcentra) per weight-based protocol PLUS slow IV vitamin K (phytonadione) 5–10 mg, with continuous monitoring; FFP is acceptable if PCC is unavailable.✓ Correct answer
2Hold warfarin, oral vitamin K 1 mg, and recheck INR in 24 hours.
3Administer protamine sulfate 25 mg IV to neutralize the warfarin effect.
4Continue current warfarin dose and observe overnight while keeping the client supine.
Explanation
Warfarin-related life-threatening hemorrhage — emergency reversal Intracranial hemorrhage on warfarin is a true emergency. INR alone is misleading — even a value within target range can accompany life-threatening bleeding when the patient has anticoagulant on board. Standard guideline-based reversal:
(1) Hold all anticoagulants/antiplatelets immediately. (2) 4-factor PCC (Kcentra) is preferred over FFP because it acts within minutes, requires small volume (~100 mL), and replaces factors II, VII, IX, X plus protein C and S. Dose is INR-guided per weight (e.g., 25 IU/kg for INR 2-3.9, 35 IU/kg for INR 4-6, 50 IU/kg for INR >6, max 5000 IU). FFP is used only if PCC is unavailable (slower onset, large volume, fluid overload risk). (3) Slow IV vitamin K 5-10 mg co-administered to provide sustained reversal. Vitamin K corrects more slowly (12-24 h) but prevents INR rebound after PCC wears off. Push too fast risks anaphylactoid reaction — give over ≥30 minutes diluted. (4) Continuous monitoring: ECG, BP, repeat neuro exam, and recheck INR after PCC. (5) Concurrent supportive care: neurosurgery consult, blood pressure control, head-of-bed positioning per neuro guidance, seizure precautions, definitive surgical management as indicated.
Other choices: • Option 2 (hold + low-dose oral vitamin K + 24-h recheck) is appropriate for asymptomatic supratherapeutic INR, NOT life-threatening hemorrhage. • Option 4 (continue warfarin, observe) is dangerous — bleeding will progress. • Option 3 (protamine sulfate) reverses HEPARIN, not warfarin. Confusing the two is a high-frequency NCLEX trap.
In-depth explanation
Clinical reasoning summary Warfarin-related life-threatening hemorrhage — emergency reversal Intracranial hemorrhage on warfarin is a true emergency. INR alone is misleading — even a value within target range can accompany life-threatening bleeding when the patient has anticoagulant on board. Standard guideline-based reversal:
(1) Hold all anticoagulants/antiplatelets immediately. (2) 4-factor PCC (Kcentra) is preferred over FFP because it acts within minutes, requires small volume (~100 mL), and replaces factors II, VII, IX, X plus protein C and S. Dose is INR-guided per weight (e.g., 25 IU/kg for INR 2-3.9, 35 IU/kg for INR 4-6, 50 IU/kg for INR >6, max 5000 IU). FFP is used only if PCC is unavailable (slower onset, large volume, fluid overload risk). (3) Slow IV vitamin K 5-10 mg co-administered to provide sustained reversal. Vitamin K corrects more slowly (12-24 h) but prevents INR rebound after PCC wears off. Push too fast risks anaphylactoid reaction — give over ≥30 minutes diluted. (4) Continuous monitoring: ECG, BP, repeat neuro exam, and recheck INR after PCC. (5) Concurrent supportive care: neurosurgery consult, blood pressure control, head-of-bed positioning per neuro guidance, seizure precautions, definitive surgical management as indicated.
Other choices: • Option 1 (hold + low-dose oral vitamin K + 24-h recheck) is appropriate for asymptomatic supratherapeutic INR, NOT life-threatening hemorrhage. • Option 2 (continue warfarin, observe) is dangerous — bleeding will progress. • Option 4 (protamine sulfate) reverses HEPARIN, not warfarin. Confusing the two is a high-frequency NCLEX trap.