What causes high Prothrombin time and low RBC?

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

If your Prothrombin time is in between 12 seconds and 16 seconds and your RBC is in between 4.5 mil/uL and 5.5 mil/uL then you need not worry as these are the normal ranges for Prothrombin time and RBC 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	12.12
5-10 years	12.241
10-15 years	12.364
15-20 years	12.488
20-25 years	12.613
25-30 years	12.739
30-35 years	12.867
35-40 years	12.996
40-45 years	13.126
45-50 years	13.257
50-55 years	13.39
55-60 years	13.524
60-70 years	13.659
70-80 years	13.796
80-90 years	13.934
90-100 years	14.073
>100 years	14.214

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

Normal range of RBC : 4.5 - 5.5 mil/uL

Ideal values of RBC depending on age :

Age	Ideal RBC value
<5 years	4.545
5-10 years	4.59
10-15 years	4.636
15-20 years	4.682
20-25 years	4.729
25-30 years	4.776
30-35 years	4.824
35-40 years	4.872
40-45 years	4.921
45-50 years	4.97
50-55 years	5.02
55-60 years	5.07
60-70 years	5.121
70-80 years	5.172
80-90 years	5.224
90-100 years	5.276
>100 years	5.329

High Prothrombin time and low RBC can be caused by a lot of reasons. If you take Prothrombin time and RBC blood tests and the results are higher than 16 seconds for Prothrombin time and lower than 4.5 mil/uL for RBC, 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 RBC Tests Are Done :

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