Xa inhibitor DOAC reversal in head injury: which agent is appropriate?

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Multiple Choice

Xa inhibitor DOAC reversal in head injury: which agent is appropriate?

Direct Xa inhibitors require a targeted antidote to reverse their effect quickly, especially in a head injury where rapid control of bleeding is vital. Andexanet alfa serves as a decoy receptor for factor Xa inhibitors, binding the drug in the bloodstream and quickly restoring anti-Xa activity to normal. This rapid, specific reversal helps stop ongoing intracranial bleeding and improves hemostasis, which is why it is the best choice in this scenario. Vitamin K won’t help because it only reverses warfarin’s effects on vitamin K–dependent factors, not Xa inhibitors. Fresh frozen plasma provides various clotting factors but has no targeted mechanism for Xa inhibitors and tends to have a slower, less predictable effect. Prothrombin complex concentrates can reverse Xa inhibitors in some settings, but they are not the specific antidote; andexanet alfa is preferred for its direct mechanism and faster action.

Direct Xa inhibitors require a targeted antidote to reverse their effect quickly, especially in a head injury where rapid control of bleeding is vital. Andexanet alfa serves as a decoy receptor for factor Xa inhibitors, binding the drug in the bloodstream and quickly restoring anti-Xa activity to normal. This rapid, specific reversal helps stop ongoing intracranial bleeding and improves hemostasis, which is why it is the best choice in this scenario.

Vitamin K won’t help because it only reverses warfarin’s effects on vitamin K–dependent factors, not Xa inhibitors. Fresh frozen plasma provides various clotting factors but has no targeted mechanism for Xa inhibitors and tends to have a slower, less predictable effect. Prothrombin complex concentrates can reverse Xa inhibitors in some settings, but they are not the specific antidote; andexanet alfa is preferred for its direct mechanism and faster action.

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