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When would you need a prothrombin time test?

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This test checks how quickly your blood clots. Your doctor may order it if you have symptoms of bleeding disorder, including:

You’d also need this test if you’re on blood thinners. The prothrombin time test helps make sure you get the right dose -- you want to prevent dangerous clots, but still let your blood clot when you need it to.

  • Bleeding or bruising easily
  • Blood clots that form when they shouldn’t
  • Blood in your poop or urine
  • Gums that bleed easily
  • Heavy menstrual periods in women
  • Nosebleeds
  • Swelling or pain in your joints

From: What Is a Prothrombin Time Test? WebMD Medical Reference

SOURCES:

KidsHealth: “Blood Test: Prothrombin Time,” “Blood Test: Partial Thromboplastin Time (PTT).”

University of Rochester Medical School: “Prothrombin Time.”

Lab Tests Online: “Prothrombin Time and International Normalized Ratio.”

Mayo Clinic: “Prothrombin Time Test.”

National Hemophilia Foundation: “Von Willebrand Disease.”

Reviewed by Minesh Khatri on May 16, 2019

SOURCES:

KidsHealth: “Blood Test: Prothrombin Time,” “Blood Test: Partial Thromboplastin Time (PTT).”

University of Rochester Medical School: “Prothrombin Time.”

Lab Tests Online: “Prothrombin Time and International Normalized Ratio.”

Mayo Clinic: “Prothrombin Time Test.”

National Hemophilia Foundation: “Von Willebrand Disease.”

Reviewed by Minesh Khatri on May 16, 2019

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Besides bleeding disorders, what problems does a prothrombin time test check for?

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