PT/INR vs aPTT (PTT) Nursing Explained NCLEX Lab Values

PT/INR vs. aPTT (PTT) nursing review lecture for students.
The PT/INR and aPTT are blood tests used to assess how fast the blood clots. These coagulation tests share some similarities and differences, which will be discussed in this review.
The pt/inr assesses the extrinsic and common pathways of the coagulation cascade. Therefore, it assesses clotting factors: I, II, V, X (clotting factors of the common pathways), and factor VII (clotting factor of the extrinsic pathway).
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The aPTT assess the intrinsic and common pathways of the coagulation cascade. Therefore, it assesses clotting factors: : I, II, V, X (clotting factors of the common pathways), and XII, XI, IX, VIII (clotting factors of the intrinsic pathway).
The pt/inr and aptt are helpful in assessing for clotting disorders and monitoring patients who are taking anticoagulation therapy.
The PT/INR is used to monitor patients who are taking Warfarin/Coumadin. On the other hand, the aPTT Is used to monitor patients who are on Heparin.
For more similarities and differences, please watch the video above.
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