In the thread about getting your HGB/HCT checked there was discussion about why it's important to check and also a few ways to lower them and how to help "thin the blood" (baby aspirin, etc.).
Here's the thing: say your HGB is 17, you donate 1-2 units and get your HGB to 15 or 16... this is still a bit high and can still offer some viscous blood (granted, a baby aspirin per day plus fish oil does do wonders for this).
However- if you still want to take extra precaution (and do a GREAT deed) you can ask for "plateletpheresis". It's about a 2-3 hour procedure where they ONLY take your platelets. You can do it any time between a blood draw. They draw your blood, filter it through a machine, and give your plasma and RBC's back to you. While this does not lower your HGB any, it does affect the viscosity of your blood. Remember, it's not the HGB itself that causes a blood clot per se, it's the viscosity and the platelet aggregation.
Here's the thing: say your HGB is 17, you donate 1-2 units and get your HGB to 15 or 16... this is still a bit high and can still offer some viscous blood (granted, a baby aspirin per day plus fish oil does do wonders for this).
However- if you still want to take extra precaution (and do a GREAT deed) you can ask for "plateletpheresis". It's about a 2-3 hour procedure where they ONLY take your platelets. You can do it any time between a blood draw. They draw your blood, filter it through a machine, and give your plasma and RBC's back to you. While this does not lower your HGB any, it does affect the viscosity of your blood. Remember, it's not the HGB itself that causes a blood clot per se, it's the viscosity and the platelet aggregation.