What does high Prothrombin time and APTT mean in blood test?

High Prothrombin time and APTT can be caused by numerous problems.

High levels of Prothrombin time and APTT in the blood indicate a variety of health problems. If your blood Prothrombin time level is between 12 seconds to 16 seconds and the APTT level is between 22 seconds to 35 seconds, then your body does not have any underlying health problems. But if Prothrombin time and APTT levels exceed these levels, you should see a doctor immediately.

Normal Prothrombin time range : 12 - 16 seconds

Age-wise ideal Prothrombin time level in blood:

Age	Ideal Prothrombin time value
<5 years	12.163
5-10 years	12.328
10-15 years	12.496
15-20 years	12.666
20-25 years	12.838
25-30 years	13.013
30-35 years	13.19
35-40 years	13.369
40-45 years	13.551
45-50 years	13.735
50-55 years	13.922
55-60 years	14.111
60-70 years	14.303
70-80 years	14.498
80-90 years	14.695
90-100 years	14.895
>100 years	15.098

*Ideal values ​​are calculated based on our database of patient records

If you want your blood test report to be interpreted by Prothrombin time specialist, then you can upload your report. Our Prothrombin time expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours. Upload blood test report now

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Some examples of conditions that increase or decrease Prothrombin time levels include:

• Liver disease
• Vitamin K abnormality
• Hemophilia A and hemophilia B
• Decreased or defective factor I (fibrinogen), II (prothrombin), V or X
• Willebrand disease

If you want your blood test report to be interpreted by Prothrombin time specialist, you can upload your report. Our Prothrombin time expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours. Upload blood test report now

Normal APTT range : 22 - 35 seconds

Age-wise ideal APTT level in blood:

Age	Ideal APTT value
<5 years	22.299
5-10 years	22.602
10-15 years	22.909
15-20 years	23.221
20-25 years	23.537
25-30 years	23.857
30-35 years	24.181
35-40 years	24.51
40-45 years	24.843
45-50 years	25.181
50-55 years	25.523
55-60 years	25.87
60-70 years	26.222
70-80 years	26.579
80-90 years	26.94
90-100 years	27.306
>100 years	27.677

High Prothrombin time and APTT levels in the blood can cause a number of health problems. Your GP may recommend follow-up tests to get an important picture of your overall health and well-being. If the results are greater than 16 seconds for Prothrombin time and more than 35 seconds for APTT, you may also need some follow-up tests that will help detect the underlying disease early.

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How is a blood test performed in the lab?

Depending on the symptoms you are experiencing, your doctor may order a Prothrombin time and APTT test. In most hospitals Prothrombin time and APTT results can be obtained within three to six hours after blood is taken. The blood is usually drawn from a vein on the inside of the elbow or the back of the hand. Drink plenty of water before your appointment. If you experience any symptoms that you are concerned about are out of the ordinary, call your doctor immediately.