Well, being a platelet donor means you have to have given blood at least once. I can not recall if they take a sample of your blood for analysis, or you have to go to a NBS centre. If you do all this, and you pass the extra tests you are now ready to give platelets. Do not take it personally if you fail this test, only 1 in 5 donors pass this test.
It will take about 80 minutes to do give them, so this is not for the impatient. See some very important rules below:
1. Have something to eat before donating; they will NOT let you eat while donating, but you can drink all you like (no, not alchol, a soft drink) during the donation.
2. DO go to the toilet before donating. If you think needles are painful just try holding out for the loo for an hour. This will be agony.
3. Do NOT ask if they pay travel expenses to the the centre. They do not and you will look mean for asking, but they do give you a parking voucher.
4. Do not be surprised if what comes out of you does not look like blood. It does not look red, it looks like pineapple juice, but you should take this as a compliment, as these are the tastiest fruits in the world.
5. Last but by no means least, do not under any circumstances move your left arm (or whichever arm is donating) as this will stop the flow of blood to the machine. You will also get a bruise in the arm, and a slap in the face from a nurse. This may sound stupid, but you can do anything else except move your donating arm, which is a cardinal sin in an NBS blood centre.
Hope this helps, and let us know how you get on. I shall expect at least one of you to do this now.