Key Concepts
Overview
Anticoagulants ('blood thinners') prevent thrombus formation or extension and are among the highest-risk medications in clinical practice. They are used to treat and prevent VTE (DVT, PE), atrial fibrillation (stroke prevention), ACS, mechanical heart valves, and post-procedure anticoagulation. Anticoagulants do not dissolve existing clots — they prevent further clot growth and new clot formation. Three main classes: - Unfractionated heparin (UFH): IV/SQ, monitored by aPTT, reversed by protamine sulfate - Low molecular weight heparin (LMWH): enoxaparin, SQ only, monitored by anti-Xa in special populations, partially reversed by protamine - Warfarin (Coumadin): oral, monitored by INR (target 2–3 for most indications), slow onset, reversed by vitamin K + FFP - Direct oral anticoagulants (DOACs): rivaroxaban, apixaban, dabigatran — no routine monitoring, specific reversal agents available For NCLEX-RN: monitoring parameters, bleeding precautions, HIT recognition, and reversal agents are the highest-yield content. On the exam, writers often pair stable-sounding options with unstable data—notice the mismatch before you commit. If the stem names a license or role, reread that line; scope errors are classic trap answers even when the clinical topic is familiar. Run...