What is the formula for calculating the International Normalized Ratio (INR)?

Prepare for the AAB Medical Technologist (MT) Generalist Exam with flashcards and multiple choice questions. Each question includes hints and explanations to boost your understanding. Get exam-ready now!

The formula for calculating the International Normalized Ratio (INR) is indeed based on the patient's Prothrombin Time (PT) and the control PT, making the first answer the correct choice. To calculate INR, you take the patient's PT and divide it by the control PT, which is a standard reference value provided to ensure consistency across different laboratories and reagents.

This ratio serves to standardize PT results, accounting for variations in testing methodologies and reagents used, enabling healthcare professionals to compare results more accurately, regardless of where the test is performed. INR is specifically used in monitoring patients on anticoagulation therapy, allowing for safe and effective management of medication dosages.

The other choices would not provide a correct representation of INR. Dividing control PT by patient PT would not yield a meaningful value in this context; multiplying or adding the PT results also fails to align with the standard process for INR calculation, as it does not account for the need to create a standardized ratio that can be utilized across different healthcare settings.

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy