What causes high INR and low Plateletcrit?

High INR and low Plateletcrit can be caused by many reasons.

If your INR is in between 0.9 ratio and 1.2 ratio and your Plateletcrit is in between 0.2 % and 0.39 % then you need not worry as these are the normal ranges for INR and Plateletcrit 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 INR levels include:

• Liver disease
• Vitamin K abnormality
• Decreased or defective factor I (fibrinogen), II (prothrombin), V or X
• Hemophilia A and hemophilia B
• Autoantibody against a specific factor (e.g., factor VIII)

Normal range of INR : 0.9 - 1.2 ratio

Ideal values of INR depending on age :

Age	Ideal INR value
<5 years	0.951
5-10 years	1.005
10-15 years	1.062
15-20 years	1.122
20-25 years	1.186
25-30 years	1.182
30-35 years	1.178
35-40 years	1.175
40-45 years	1.172
45-50 years	1.168
50-55 years	1.164
55-60 years	1.16
60-70 years	1.157
70-80 years	1.153
80-90 years	1.149
90-100 years	1.145
>100 years	1.142

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

Normal range of Plateletcrit : 0.2 - 0.39 %

Ideal values of Plateletcrit depending on age :

Age	Ideal Plateletcrit value
<5 years	0.211
5-10 years	0.223
10-15 years	0.236
15-20 years	0.249
20-25 years	0.263
25-30 years	0.278
30-35 years	0.294
35-40 years	0.311
40-45 years	0.329
45-50 years	0.348
50-55 years	0.368
55-60 years	0.389
60-70 years	0.388
70-80 years	0.387
80-90 years	0.386
90-100 years	0.385
>100 years	0.384

High INR and low Plateletcrit can be caused by a lot of reasons. If you take INR and Plateletcrit blood tests and the results are higher than 1.2 ratio for INR and lower than 0.2 % for Plateletcrit, 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 INR and Plateletcrit Tests Are Done :

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

Medical References

• MedlinePlus – Prothrombin Time Test and INR (PT/INR)
• Mayo Clinic – Prothrombin time test
• Cleveland Clinic – Prothrombin Time (PT/INR) Test