1. Why one is not allowed to donate blood before attaining the age of 18 years?
Physiologically there is no harm in donating blood in the early age. The reason is legal, 18 being the age of consent in our country.

2. Blood is collected from a vein. Naturally, it is rich in carbon dioxide content. What purpose does it serve? Why is blood not collected from an artery to get blood rich in oxygen content?
Though the blood collected from a vein is rich in carbon dioxide, it is transfused in the vein of the recipient and is automatically oxygenate in course of normal circulation and therefore serves the required purpose.
Blood is not collected from artery for the following reasons: Veins remain in the upper surface of the body muscle and can be easily identified while arteries remain in the sub-surfaces and therefore cannot be easily identified. Blood pressure in vein is low compared to that in artery. Puncturing of artery causes bleeding at higher pressure and velocity leading to trouble in stopping the bleeding after donation which is not a problem in case of vein.

3.Why is my finger pricked before donation?
To estimate "haemoglobin" content in blood. This is the component of the red cells which transport oxygen in the human body to all the organs and tissues. If the level is low, it is not wise to give blood.

4. What physical tests are performed before blood donation?
1. Weighing (not less than 45 kg)
2. Hb estimation (12.5gm/100ml by copper sulphate method)
3. Measurement of blood pressure (systolic 160/100 mmHg; diastolic 90/60 mmHg)
4. Checking heart beats (60 - 100 times per minute), condition of liver, lung and spleen
5. Body temperature (37oC)

5.Why blood is not collected from a person having a haemoglobin content of less than 12.5 gm/l00ml?
Hemoglobin in the blood carries oxygen from the respiratory organs (lungs ) to the rest of the body (i.e. the tissues) where it releases the oxygen to burn nutrients to provide energy to the organism, and collects the resultant carbon dioxide to bring it back to the respiratory organs to be dispensed from the organism. Hence blood with less Hb content than the prescribed (12.5gm/100ml) does not help the patient much in carrying oxygen to cells.

6. I’ve been deferred before. Should I try again?
Yes, you can, most deferrals are temporary–not permanent.

7. Is blood donation very painful?
No. Not more than a prick of an injection needle.

8. Does it take long time to donate blood?
It should take up not more than 20 minutes of time including time for rest and taking refreshment.

9. How much blood do you take?
Blood banks take only 350 ml of blood as your gift of love.

10. Will I feel all right after donation?
Yes, you can go back to your normal work after 30 minutes.

11. Will I become anemic after donating?
Most people do not become anemic after donating. The body begins replenishing lost fluid within a day and Red Blood Cell (RBC) in 21 days.

12. How often may I donate blood?
You may donate once in 90 days (upto 4 times per year)

13. Why 3 months interval has been stipulated though donated blood is recuperated within 21 days?
As an additional precautionary measure for safety of donor.

14. What is the liquid in the bag into which the blood is taken?
It is called anti-coagulant and prevents the blood from clotting. It also helps to preserve the blood cells. It is known as CPDA (Citrate, Phosphate, Dextrose, Adenine) solution

15. What laboratory tests are performed in blood bank for each bag of collected blood?
1. HIV (AIDS) test
2. Jaundice (Hepatitis B & C)
3. Venereal disease (STD)
4. Malaria
5. Blood Group
6. Before issuing blood, compatibility tests (cross matching) are done.

16. Why the above laboratory tests are not performed before donation?
As per Government of India norms test to be carried out after the donation

17. If something is wrong with my blood, will I find out?
Yes, you will be notified confidentially.

18. Can I get AIDS from donating blood?
No, all equipment is sterile and used only for you. You can’t "catch" anything by giving blood.

19. How long can blood be preserved in a blood bank?
Blood is normally preserved in blood bank for 35 days using CPDA or CPDA1 solution as anticoagulant and shelf life 42 days in Sagam solution at 4oC.

20. The Maximum life span of RBC is 120 days, why is then blood is preserved in blood bank for only 35 days?
Donated blood contains cells ranging from 1 to 120 days’ life span RBC. Naturally, cells having such varied life spans cannot be preserved for 120 days in the bag since in that case there will only be a few living cells Present. In order to get a considerable number of living cells present in the blood for transfusion, 35 days shelf life has been found to be optimum with CPDA and CPDA1 solution on the basis of various experiments. Furthermore, cells which can remain alive for 120 days within the human body cannot survive for such period in an artificial environment.

21. Will there be any good if blood is transfused to a patient on the 34th day after collection from the donor?
It will serve the purpose of volume expander. There will still be a considerable number of living red cells present in the bag which will be able to carry oxygen to the cells and bring back carbon dioxide.

22. We have read in the science journals about artificial blood. What is it? Can it be used for transfusion as a substitute for human blood?
The research is still in a preliminary stage. The term ‘artificial blood’ is a misnomer as blood has various functions. The so called ‘artificial’ blood can only carry oxygen to the cells and bring back carbon dioxide in a limited way but cannot perform any other function of blood at all. Further, this so called substitute is quite costly for developing countries like India

23. Is donated blood sold to needy patients?
Blood Banks do not charge for the blood itself. However, donated blood must undergo many tests to assure that it is safe to be transfused. Technically, they are charging for the testing that they perform on the donated blood.
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