INR vs APT

Before a surgery is done, the doctors perform blood tests so as to determine the time needed for clotting. Different tests are conducted, and these tests are called coagulation tests. “INR” or “International Normalized Ratio” and “APT” or “Activated Partial Thromboplastin” time are among the tests that are widely used for calculating blood clotting.

Both the INR and APT tests help in knowing the impact of anticoagulants or blood-thinning medicines which may be used at times of surgery. The APT test is mainly conducted in patients who have been taking blood-thinning medicines like “heparin.” The APT test helps in determining the dosage for the patient and also to determine the duration of the dosage.

The APT test is also conducted for detecting the causes of bruising or unusual bleeding. This test is also conducted for determining the factors that lead to blood-clotting problems. Generally, the APT clotting time is between 27 and 35 seconds.

The INR test is mainly used to determine if the results of the APT tests in one lab are the same as that in another lab. The INR test was necessitated as the ATP result from one lab could differ from the result of another lab test. As such, the World Health Organization in the 1980s came up with the International Normalized Ratio. The INR results would be the same at any location. The INR would be 1.0 in patients who are under anticoagulants. It would be between 2.0 and 3.0 for patients having atrial fibrillation.

Summary:

1.“INR” or “International Normalized Ratio” and “APT” or “Activated Partial Thromboplastin” time are tests that are widely used for calculating blood clotting.
2.The APT test is mainly conducted in patients who have been taking blood-thinning medicines like “heparin.” The APT test helps in determining the dosage for the patient and also to determine the duration of the dosage.
3.The INR test is mainly used to determine if the results of the APT tests in one lab are the same as that in another lab.
4.The APT test is also conducted for detecting the causes of bruising or unusual bleeding. This test is also conducted for determining the factors that lead to blood-clotting problems.
5.The INR test was necessitated as the ATP result from one lab could differ from the result of another lab test.
6.Generally, the APT clotting time is between 27 and 35 seconds. The INR would be 1.0 in patients who are under anticoagulants. It would be between 2.0 and 3.0 for patients having atrial fibrillation.

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