American Association of Critical-Care Nurses (AACN) Certification Practice Test

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Prepare for the AACN Certification Test. Study with flashcards and multiple choice questions, each question comes with hints and explanations. Get ready for your exam!

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What is the typical range for the international normalized ratio (INR)?

  1. 0.5-1.5

  2. 1.0-2.0

  3. 1.5-3.0

  4. 2.0-3.5

The correct answer is: 1.0-2.0

The international normalized ratio (INR) is a standardized measure used to evaluate the blood's clotting ability, specifically for patients on anticoagulant therapy such as warfarin. The typical range for INR in patients who are not on anticoagulation therapy is generally around 1.0-2.0. This range indicates a normal coagulation status and helps healthcare providers to monitor and adjust anticoagulant dosages effectively. Patients on anticoagulant therapy may have higher INR levels depending on their treatment goals, which might typically fall within the ranges of 2.0-3.0 or even 2.0-3.5 depending on the specific conditions being treated. However, for the general population not undergoing treatment, 1.0-2.0 is considered to maintain a safe and standard level for coagulation, making this the correct answer in the context of non-anticoagulated individuals.