Is APTT 53 high, normal or dangerous? What does APTT level 53 mean?

📅 Medical Review Date: November 25, 2025

Your APTT level of 53 is a High APTT level.

High APTT levels may indicate underlying health problems. The normal range is typically between 22 seconds and 35 seconds. If your levels are outside this range, it's important to speak with a healthcare provider. Consulting a doctor is recommended to determine the cause and appropriate next steps.

The normal APTT range for men is :22 - 35 seconds

Ideal values of APTT depending on age (male) :

Age	Ideal APTT value
<5 years	23.166
5-10 years	24.394
10-15 years	25.687
15-20 years	27.048
20-25 years	28.482
25-30 years	29.992
30-35 years	31.582
35-40 years	33.256
40-45 years	33.163
45-50 years	34.921
50-55 years	34.823
55-60 years	34.726
60-70 years	34.628
70-80 years	34.53
80-90 years	34.433
90-100 years	34.336
>100 years	34.24

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

Get Advice via Email : Send us your blood test report, and our APTT experts will review it. You'll receive a detailed analysis and personalized treatment guidance via email within 12 hours. If you have additional blood test results besides APTT, please include those too—an accurate diagnosis often requires a full view of all abnormalities. Upload blood test report now

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Some examples of conditions that increase or decrease APTT levels include:

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

Receive world-class medical opinion about your high APTT levels over email.Upload blood test report now

Normal range of APTT found among women :22-35 seconds

Ideal values of APTT depending on age (female) :

Age	Ideal APTT value
<5 years	23.201
5-10 years	24.468
10-15 years	25.804
15-20 years	27.213
20-25 years	28.699
25-30 years	30.266
30-35 years	31.918
35-40 years	33.66
40-45 years	33.559
45-50 years	33.459
50-55 years	33.36
55-60 years	33.26
60-70 years	33.161
70-80 years	34.971
80-90 years	34.867
90-100 years	34.763
>100 years	34.66

If you take a APTT blood test and the results are not in the normal range (22-35 seconds), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

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How the APTT Test Is Done :

When your doctor orders a APTT test, it involves a straightforward blood draw to measure your APTT levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your APTT test results are usually available within a few hours.

Medical References

• WebMD – Activated Partial Thromboplastin Time (APTT) Test
• Cleveland Clinic – Partial Thromboplastin Time (PTT) Test
• NIH – Solutions to Establishing and Verifying Normal Reference Intervals and Assessing APTT Reagents