Once you have joined the register you could be identified as a potential donor for a patient at any time. This is what happens next:
- A further blood sample is taken to enable specific tissue typing
- If you are found to be the best match for a patient you will be given a thorough explanation of the donation process
- You will undergo a medical examination to check that you are fit enough to donate, including further blood tests
The commonest method of donation actually involves the removal of stem cells from your prehipheral blood stream, rather than the bone marrow itself.
This is what happens:
- For the 4 days preceeding the donation, you will be given a growth factor injection to stimulate the production of stem cells in your body
- On the 5th day and assuming that you have enough circulating stem cells, you will be connected to an Apheresis machine at hospital
- Blood will be collected from a vein in one arm, stem cells will be 'filtered out' by the apheresis machine, and the blood will be returned to your other arm
Platelet donors will be very familiar with the above process which lasts around 4 hours. No in-patient stays are required and neither is there any general or spinal anaesthetic.
You may experience some flu like symptoms for a short time afterwards but these quickly disperse and normal activities can be resumed in 24 hours.