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Prothrombin Time

375
4.2
NABL, ISO
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Overview
Test Results & Interpretations
Patient Concerns

Overview of Prothrombin Time

Test Description

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.

Why Get Tested

  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



Precautions

  • No special preparation required

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

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

Provided By

NABL

ISO

General Diagnostics Pvt Ltd is a medical technology company and provider of high-end Preventive Screening and Diagnostic tests with a special focus on metabolomics. General Diagnostics Pvt Ltd isRead More

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