Prothrombin Time

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Overview
Interpretations
FAQ's

Overview of Prothrombin Time

What is Prothrombin Time?

It measures the amount of time your blood takes to clot. This test is prescribed when you have prolonged bleeding or unexplained clotting such as nosebleeds, gum bleeding or easy bruising. A doctor can also order this test if he is suspecting liver disease, vitamin K deficiency or to monitor the effect of blood thinning drugs like warfarin.

Sample Type

The sample type collected for Prothrombin Time is: Blood

Preparation for Prothrombin Time

  • No special preparation required

Why Get Tested for Prothrombin Time?

  1. If you have signs or symptoms of a bleeding or clotting disorder like easy bruising, heavy menstrual periods, nosebleeds, swollen and painfol joints 
  2. If you are taking blood thinning medicines like warfarin 
  3. If you have suspected liver disease or vitamin K deficiency




What Results of Prothrombin Time mean?

Interpretations

It usually takes 11 to 14 seconds for blood plasma to clot if you are not taking blood thinning medicines. That means the Prothrombin time is usually between 11 to 14 seconds. If you are taking blood thinners like warfarin, the planned INR is between 2 to 3.5. 


Some causes of increased PT are:
a. Bleeding or clotting disorder
b. Wrong dose of warfarin
c. Vitamin K deficiency
d. Liver disease
e. Rarely, Factor II or Prothrombin deficiency


Patient Concerns about Prothrombin Time

Frequently Asked Questions about Prothrombin Time

Q. Are there any other factors which can affect my PT?
Yes, PT is governed by a large number of factors like alcohol, drugs like oral contraceptive pills, food items such as beef, broccoli, green tea etc. Therefore, it is very important for you to tell your doctor about any medicines, supplements or food items which you are taking.
Q. If my PT is abnormal, what other tests will my doctor order?
1. Partial thromboplastin time (PTT) 2. Platelet count 3. Thrombin time 4. Fibrinogen testing 5. Tests for coagulation factors 6. Von Willibrand factor

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For over a hundred years, human pathology has been one of the keystones of medicine and rightly so at SRL, we offer our patients world-class Pathology services because their well-being is of the utmost importance to us. Pathology is quite simply the scientific study of the overall response of your body to any foreign influence, i.e., disease. Actually, we use this knowledge to diagnose & subsequently treat your ailment. What we basically do is carefully compare the normal structure and function of a human body (anatomy and physiology) to the abnormal structure and function we witness in an unwell human. Doing this is the most crucial phase & we take note of even the minutest details while adjudging the extent of your ailment because one slip can lead to an incorrect diagnosis, posing serious threat to your health. Our experts ensure that they are extremely careful while analyzing the samples. This is where our advanced technology chips in. SRL is proud to host state-of-the-art equipments based on the latest technology for a speedy and accurate result. We do not take any chances whatsoever with your health & well-being. Avail our Pathology services with no hesitation. You are always in good hands with SRL.

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