PT INR

The PT INR test is a two-part blood screen used to measure how quickly your blood clots. "PT" stands for Prothrombin Time—the actual time in seconds it takes for a clot to form. "INR" is a standardized calculation that allows results to be compared accurately regardless of which lab or testing method was used. This test is essential for ensuring your blood is clotting at a healthy rate—not too fast and not too slow.

What This Test Covers

• Prothrombin Time (PT): The speed of clot formation in the "extrinsic" pathway of your coagulation system.

• International Normalized Ratio (INR): A mathematical adjustment that provides a universal standard for your results.

Why Order This Test?

• Monitor Blood Thinners: The most common reason for this test is to manage the dosage of Warfarin (Coumadin), ensuring the blood is thin enough to prevent clots but thick enough to prevent dangerous bleeding.

• Bleeding or Bruising Issues: Used to investigate why you might be bruising easily, having frequent nosebleeds, or experiencing heavy menstrual cycles.

• Liver Health Check: Since the liver produces the proteins needed for clotting, this test is a vital indicator of how well your liver is functioning.

• Pre-Surgery Clearance: Often required before a surgical procedure to ensure you can clot properly and won't lose too much blood during the operation.

• Vitamin K Deficiency: Helps identify if a lack of Vitamin K is affecting your body’s ability to form clots.

Fast and Private Results

• Preparation: No fasting is required. However, many medications and supplements (like Vitamin K or antibiotics) can affect results, so it is best to stay consistent with your routine.

• Turnaround Time: Results are typically available within 24 to 48 hours.

• Confidential: Your results are delivered securely to your private portal and are not shared with insurance providers.