# A nurse on a cardiac unit is reviewing reversal protocols for patients receiving anticoagulants. Which statements are accurate? Select all that apply. > source: MyMerci (mymerci.kr) > url: https://mymerci.kr/pages/nclex_q.php?qn_id=372713&lang=en > language: en > subject: Adverse Effects/Contraindications/Interactions > category: PPT ## Question A nurse on a cardiac unit is reviewing reversal protocols for patients receiving anticoagulants. Which statements are accurate? Select all that apply. 1 Oral vitamin K alone is sufficient to reverse warfarin in a patient with active intracranial hemorrhage because it begins working within 30 minutes 2 Protamine sulfate is administered IV to reverse unfractionated heparin, with the dose calculated based on units of heparin given in the previous 2 to 3 hours 3 Idarucizumab (Praxbind) is a monoclonal antibody fragment used to reverse dabigatran (Pradaxa) for life-threatening bleeding or emergency surgery 4 Warfarin-induced major bleeding is reversed with 4-factor prothrombin complex concentrate (PCC, Kcentra) plus IV vitamin K because PCC works within minutes while vitamin K takes 6 to 24 hours 5 Fresh frozen plasma (FFP) is the first-line reversal for warfarin-induced major bleeding because it works faster than 4-factor PCC 6 Protamine provides only partial reversal of low-molecular-weight heparin such as enoxaparin ## Explanation Correct: 2, 3, 4, 6. (2) Protamine sulfate is administered IV to neutralize unfractionated heparin; the dose is based on the amount of heparin received recently because heparin is cleared over time. (3) Idarucizumab is a specific antibody fragment used for emergency reversal of dabigatran in life-threatening bleeding or urgent surgery. (4) Major warfarin-associated bleeding requires rapid factor replacement with 4-factor prothrombin complex concentrate plus IV vitamin K for sustained reversal; vitamin K alone acts too slowly for intracranial hemorrhage. (6) Protamine can be used for low-molecular-weight heparin exposure, but it only partially reverses the anticoagulant effect. Incorrect: (1) Oral vitamin K alone does not provide sufficiently rapid reversal for active intracranial hemorrhage. (5) Fresh frozen plasma requires more volume and acts more slowly than 4-factor PCC; it is generally reserved for situations in which PCC is unavailable or unsuitable. For major bleeding, stop the anticoagulant and follow the current institutional reversal protocol with urgent pharmacy, hematology, or stroke-team guidance. ## In-depth explanation Match the anticoagulant with the reversal strategy. Unfractionated heparin is reversed with IV protamine based on recent heparin exposure. Protamine only partially reverses low-molecular-weight heparin such as enoxaparin. Dabigatran has a specific reversal agent, idarucizumab. Major warfarin bleeding is treated with 4-factor PCC for rapid factor replacement plus IV vitamin K for sustained correction; vitamin K alone is too slow for intracranial hemorrhage, and FFP is slower and requires more volume than PCC. Reversal decisions for major bleeding should follow the current institutional protocol and involve urgent specialty support. ## Clinical scenario Cardiac telemetry unit. Patient cohort under review: A) 78-year-old on warfarin (INR 6.5) with melena; B) 65-year-old receiving heparin drip with hematuria; C) 72-year-old on dabigatran with intracranial hemorrhage; D) 55-year-old on apixaban with retroperitoneal hematoma. Nurse preparing reversal kits and verifying weight-based doses with the pharmacist. ## Key concepts - **4-Factor PCC (Kcentra)** — Concentrated mixture of vitamin K-dependent clotting factors II, VII, IX, and X used for rapid reversal of warfarin in patients with major bleeding or before urgent surgery; works within 10 to 30 minutes - **Idarucizumab (Praxbind)** — Humanized monoclonal antibody fragment that binds dabigatran with high affinity, providing immediate reversal for life-threatening bleeding or emergency surgery; given as 5 g IV (two 2.5 g vials) - **Andexanet Alfa (Andexxa)** — Recombinant modified factor Xa decoy protein that binds and sequesters factor Xa inhibitors apixaban, rivaroxaban, and edoxaban; indicated for life-threatening or uncontrolled bleeding; carries risk of thromboembolic events ## Related questions - [A client is admitted to the emergency department after ingesting an unknown amount of acet…](https://mymerci.kr/pages/nclex_q.php?qn_id=362720&lang=en) - [A client with chronic heart failure is prescribed metoprolol 25 mg orally twice daily. 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Always follow current clinical guidelines and your institution’s protocols._