What causes high D Dimer and low APTT?

High D Dimer and low APTT can be caused by many reasons.

If your D Dimer is in between 0.1 ug/mL and 0.51 ug/mL and your APTT is in between 22 seconds and 35 seconds then you need not worry as these are the normal ranges for D Dimer and APTT respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Normal range of D Dimer : 0.1 - 0.51 ug/mL

Ideal values of D Dimer depending on age :

Age	Ideal D Dimer value
<5 years	0.114
5-10 years	0.118
10-15 years	0.122
15-20 years	0.126
20-25 years	0.131
25-30 years	0.136
30-35 years	0.141
35-40 years	0.146
40-45 years	0.151
45-50 years	0.156
50-55 years	0.162
55-60 years	0.168
60-70 years	0.174
70-80 years	0.18
80-90 years	0.186
90-100 years	0.193
>100 years	0.2

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

If you want your blood test report to be interpreted by D Dimer specialist, then you can upload your report. Our D Dimer 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 D Dimer levels include:

• Smoking
• Obesity
• Clotting disorder such as factor V Leiden mutation
• Antiphospholipid syndrome
• Prolonged immobility

If you want your blood test report to be interpreted by D Dimer specialist, you can upload your report. Our D Dimer 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 range of APTT : 22 - 35 seconds

Ideal values of APTT depending on age :

Age	Ideal APTT value
<5 years	22.792
5-10 years	23.613
10-15 years	24.463
15-20 years	25.344
20-25 years	26.256
25-30 years	27.201
30-35 years	28.18
35-40 years	29.194
40-45 years	30.245
45-50 years	31.334
50-55 years	32.462
55-60 years	33.631
60-70 years	34.842
70-80 years	34.797
80-90 years	34.752
90-100 years	34.707
>100 years	34.662

High D Dimer and low APTT can be caused by a lot of reasons. If you take D Dimer and APTT blood tests and the results are higher than 0.51 ug/mL for D Dimer and lower than 22 seconds for APTT, your physician may recommend more tests to figure out the problem. You might also get these tests if your physician thinks you have some other disease.

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How the D Dimer and APTT Tests Are Done :

If your doctor wants D Dimer and APTT tests on you, you may need to go through these tests. During the D Dimer and APTT blood tests, a pathologist will put a needle into your veins and take out a small quantity of blood. A pathologist is a physician in the medical field who thoroughly studies the causes and effects of disease. Within a few hours you will get your D Dimer and APTT Test reports by your pathologist.

Medical References

• Cleveland Clinic – D-Dimer Test: What It Is, What It Is Used For, Risks & Results
• MedlinePlus – D-Dimer Test
• WebMD – D-Dimer Test: What It Is and How It Works
• NIH – D-Dimer Test