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Donation Process

By far, the most common procedure that is carried out at the Donation Area is whole blood collection, as it is the one from which most products are obtained. The donor is greeted at the reception desk and a parking permit is issued. New donors are given a questionnaire to read beforehand in order to prepare themselves for the medical examination. If the donor thinks that there is nothing in the questionnaire that prohibits him / her from donating blood, the donor is registered in the computer database.

Following the registration, the donor is weighed, the haemoglobin (blood level) is checked, a urine analysis (urine testing) is performed and the body temperature is recorded.

Then, a doctor proceeds to the medical examination and interview. The questionnaire is discussed and explained in more detail. The donor might be deferred (not allowed to give blood) at this point. It is very important that donors are honest during the medical interview and examination. There exists a high level of confidentiality and privacy in the medical examination. No employee either in the blood transfusion department or in any other department has access to the documentation of the examining doctor except authorised personnel. On passing the medical test the donor can proceed to donating blood.

Before one enters the donation area, the donor is offered a refreshing drink, tea or coffee. A donor who has been without food for some hours is advised to have a light snack, like biscuits or sandwiches, before donating blood. This would prevent unwanted effects like dizziness during blood donation procedure.

Donating BloodThe donor proceeds to the donation area were s/he can lie comfortably on a couch, loosens any tight garments, like belts, and the nurse starts skin disinfection. The needle is inserted and the actual donation should be finished within 5 to 10 minutes. Any strange sensations should be reported immediately to the nurse. When the blood donation is over, the donor is asked to press gently on the punctured site for some minutes.

 

Finally the donor is offered other refreshments and/or snacks. A brief assessment is carried out by the nurses to confirm that the donor is feeling well and after about 15 minutes the donor may leave. Female donors can donate again after 4months, while male donors can donate after 3 months.

 

What we end with after a donation

 

 

During a blood donation 450ml of blood are withdrawn in one donation. This amounts to about one twelfth of the total blood volume in a 70kg person. Apart from this, 3 sample bottles are taken that are used for screening and blood grouping tests.

 

whole blood bag
 
blood samples
 
 

For confidentiality reasons all these products are given a barcoded number, so that once these leave the donation area for the labs and later on after a long process, to be transfused on the patient, no one will know who donated to whom. Also, if something is found in the blood during laboratory screening, the person who performs the test will know only a number and not the donor details.

Blood Testing

All blood donations are tested for HIV 1 & 2, Hepatitis B, C, Syphilis, special liver substances (enzymes) and blood grouping tests, to ensure that the patient receives the safest possible blood product. For this reason three sample bottles are taken with each donation.

Blood Process at Blood Products

Freshly drawn whole blood maintains all its properties for a limited period of time. After a whole blood donation, blood is seperated into different products. As one can notice whilst donating blood, the bits that we use have more than one bag, BUT only one is filled during donation. So one might ask how are the others used?

The following photographs explains the process of blood seperation after a whole blood donation and how the other bags are used.

 
whole blood
   
Blood drawn from a donor.
Whole blood donation.
blood seperation
blood for centrifugation
Blood is being ready for centrifugation

Blood is being filtered

seperation of blood
 

 

different blood products

 
Blood products after seperation
Seperation of blood after centrifugation
 
                 
 
3 products
     
The 3 ending products
 
 
 
 

Red cells are kept in a fridge between +2 to +6 0C for 42 days. Used for replacment in blood loss and for the therapy of anaemia.

 

Plasma (Fresh Frozen) kept in freezers at temp of -25 0C or lower for 36 months. My be used in coagulation disorders, thrombotic thrombocytopenic purpura (TTP).

 
     
 
Plateletes are stored in a special gas-permeable plastic bag at a temp of +20 to +24 0C on an agitator to guarantee availability of oxygen to platelets. These have to be used within 5 days, for patients who are unable to make enough platelets, example patients with leukemia.
 
   
 

 


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