What does high RDW SD and APTT mean in blood test?

High RDW SD and APTT can be caused by numerous problems.

High levels of RDW SD and APTT in the blood indicate a variety of health problems. If your blood RDW SD level is between 39 fL to 46 fL and the APTT level is between 22 fL to 35 seconds, then your body does not have any underlying health problems. But if RDW SD and APTT levels exceed these levels, you should see a doctor immediately.

Normal RDW SD range : 39 - 46 fL

Age-wise ideal RDW SD level in blood:

Age	Ideal RDW SD value
<5 years	39.725
5-10 years	40.464
10-15 years	41.217
15-20 years	41.984
20-25 years	42.765
25-30 years	43.56
30-35 years	44.37
35-40 years	45.195
40-45 years	45.18
45-50 years	45.164
50-55 years	45.148
55-60 years	45.988
60-70 years	45.972
70-80 years	45.956
80-90 years	45.94
90-100 years	45.924
>100 years	45.908

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

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

• Thalassemia, an inherited blood disorder
• Crohn's disease
• Chronic liver disease
• An iron or vitamin deficiency
• Heart disease

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

Age-wise ideal APTT level in blood:

Age	Ideal APTT value
<5 years	22.409
5-10 years	22.826
10-15 years	23.251
15-20 years	23.683
20-25 years	24.124
25-30 years	24.573
30-35 years	25.03
35-40 years	25.496
40-45 years	25.97
45-50 years	26.453
50-55 years	26.945
55-60 years	27.446
60-70 years	27.956
70-80 years	28.476
80-90 years	29.006
90-100 years	29.546
>100 years	30.096

High RDW SD and APTT levels in the blood can cause a number of health problems. Your GP may recommend follow-up tests to get an important picture of your overall health and well-being. If the results are greater than 46 fL for RDW SD and more than 35 seconds for APTT, you may also need some follow-up tests that will help detect the underlying disease early.

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How is a blood test performed in the lab?

Depending on the symptoms you are experiencing, your doctor may order a RDW SD and APTT test. In most hospitals RDW SD and APTT results can be obtained within three to six hours after blood is taken. The blood is usually drawn from a vein on the inside of the elbow or the back of the hand. Drink plenty of water before your appointment. If you experience any symptoms that you are concerned about are out of the ordinary, call your doctor immediately.