The aPTT is a blood test used to assess how fast the blood clots. aPTT stands from activated thromboplastin time. It assesses the intrinsic and common pathway of the coagulation cascade. Therefore, the aPTT assesses clotting Factors XII, XI, IX, VIII (part of the intrinsic pathway) I, II, V, and X (part of the common pathway). ⭐Fluid and Electrolytes eBook: null Overall, the aPTT will tell us how well the intrinsic and common pathway work to form a clot. The aPTT can be ordered to assess for bleeding disorders or to monitor a patient who is on Heparin therapy. Heparin works by enhancing the activity of antithrombin III. This substance inactivates enzymes that play a role in the clotting process. When it is activated (antithrombin III) it will prevent the activation of thrombin (which converts fibrinogen to fibrin). A normal aPTT is about 30-40 seconds. For a patient to be therapeutic on Heparin, the aPTT should be about 1.5-2.5 times the normal range for the aPTT. Quiz PT/INR vs. aPTT: https://www.registerednursern.com/pt-inr-vs-aptt-nursing-quiz/ Notes: https://www.registerednursern.com/aptt-blood-test-labs-to-know-for-nclex-review/ Labs to Know for NCLEX: https://www.youtube.com/watch?v=Q5Q2SoN28WU More NCLEX Reviews:    • NCLEX Review Lectures   Nursing Gear: null Instagram: https://www.instagram.com/registerednursern_com/ Facebook: https://www.facebook.com/RegisteredNurseRNs Twitter: https://twitter.com/NursesRN #labstoknownclex #ptinr #prothrombintime Popular Playlists: NCLEX Reviews:    • NCLEX Study Strategies   Fluid & Electrolytes:    • Fluid and Electrolytes Nursing   Nursing Skills:    • Nursing Skills Videos