What causes high Platelet count and low APTT?

High Platelet count and low APTT can be caused by many reasons.

If your Platelet count is in between 150 thou/uL and 450 thou/uL and your APTT is in between 22 seconds and 35 seconds then you need not worry as these are the normal ranges for Platelet count and APTT respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Some examples of conditions that can increase or decrease Platelet count levels include:

• Sepsis
• Platelets may be used up quickly in serious conditions, such as disseminated intravascular coagulation
• Bone marrow damage
• Inflammatory bowel disease (IBD)
• Viral infections such as mononucleosis

Normal range of Platelet count : 150 - 450 thou/uL

Ideal values of Platelet count depending on age :

Age	Ideal Platelet count value
<5 years	152.64
5-10 years	155.326
10-15 years	158.06
15-20 years	160.842
20-25 years	163.673
25-30 years	166.554
30-35 years	169.485
35-40 years	172.468
40-45 years	175.503
45-50 years	178.592
50-55 years	181.735
55-60 years	184.934
60-70 years	188.189
70-80 years	191.501
80-90 years	194.871
90-100 years	198.301
>100 years	201.791

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

Normal range of APTT : 22 - 35 seconds

Ideal values of APTT depending on age :

Age	Ideal APTT value
<5 years	22.387
5-10 years	22.781
10-15 years	23.182
15-20 years	23.59
20-25 years	24.005
25-30 years	24.427
30-35 years	24.857
35-40 years	25.294
40-45 years	25.739
45-50 years	26.192
50-55 years	26.653
55-60 years	27.122
60-70 years	27.599
70-80 years	28.085
80-90 years	28.579
90-100 years	29.082
>100 years	29.594

High Platelet count and low APTT can be caused by a lot of reasons. If you take Platelet count and APTT blood tests and the results are higher than 450 thou/uL for Platelet count 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 Platelet count and APTT Tests Are Done :

If your doctor wants Platelet count and APTT tests on you, you may need to go through these tests. During the Platelet count 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 Platelet count and APTT Test reports by your pathologist.

Medical References

• Cleveland Clinic – Platelet Count (PLT): Normal Range, Test Results & Meaning
• MedlinePlus – Platelet Tests
• MedlinePlus – Platelet count