What causes high Prothrombin time and low Calcium?

High Prothrombin time and low Calcium can be caused by many reasons.

If your Prothrombin time is in between 12 seconds and 16 seconds and your Calcium is in between 8.5 mg/dL and 10.1 mg/dL then you need not worry as these are the normal ranges for Prothrombin time and Calcium 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 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

Normal range of Prothrombin time : 12 - 16 seconds

Ideal values of Prothrombin time depending on age :

Age	Ideal Prothrombin time value
<5 years	12.124
5-10 years	12.249
10-15 years	12.375
15-20 years	12.503
20-25 years	12.632
25-30 years	12.762
30-35 years	12.894
35-40 years	13.027
40-45 years	13.161
45-50 years	13.297
50-55 years	13.434
55-60 years	13.573
60-70 years	13.713
70-80 years	13.855
80-90 years	13.998
90-100 years	14.142
>100 years	14.288

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

Normal range of Calcium : 8.5 - 10.1 mg/dL

Ideal values of Calcium depending on age :

Age	Ideal Calcium value
<5 years	8.588
5-10 years	8.677
10-15 years	8.767
15-20 years	8.857
20-25 years	8.948
25-30 years	9.04
30-35 years	9.133
35-40 years	9.227
40-45 years	9.322
45-50 years	9.418
50-55 years	9.515
55-60 years	9.613
60-70 years	9.712
70-80 years	9.812
80-90 years	9.913
90-100 years	10.015
>100 years	10.014

High Prothrombin time and low Calcium can be caused by a lot of reasons. If you take Prothrombin time and Calcium blood tests and the results are higher than 16 seconds for Prothrombin time and lower than 8.5 mg/dL for Calcium, 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 Prothrombin time and Calcium Tests Are Done :

If your doctor wants Prothrombin time and Calcium tests on you, you may need to go through these tests. During the Prothrombin time and Calcium 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 Prothrombin time and Calcium 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