The Salient Point
Tuesday, March 31st, 2009I feel compelled to describe my most recent blood donation to the American Red Cross, a double red donation.
When most people talk about donating blood, they’re talking about giving one unit of “whole” blood - the nurse literally withdraws a pint of blood as it courses through the veins.
Without sounding like I think I know what I’m talking about, I’ll say that whole blood, as far as the Red Cross is concerned, is made up of red blood cells, platelets, and plasma. They can only safely withdraw one pint because of the body’s need for blood to carry nutrients throughout the body, help maintain body temperature, and so on…
But what I didn’t know, until yesterday, is that somebody takes all of that whole blood and separates it later, in a centrifuge machine, after the blood has been collected and transported (presumably to a lab). From there, the various components of whole blood can be used in various ways - information on this is readily available.
What the Red Cross can do (and as far as I know, has been able to do for a number of years) is separate one’s whole blood into parts on site, then return the donor’s plasma mixed with saline back into the bloodstream through the same needle. Thus, behold: Twice as many red blood cells can be donated at one sitting and, accord to the Red Cross, the procedure is generally more pleasant for the donor than when giving whole blood.
The main reason for this is that the volume of blood circulating in the donor’s body, by the end of the procedure, is roughly equivalent to the volume before the procedure. The saline provides hydration, which reduces the need to consume liquids afterwards - in fact, when giving whole blood the donor must stay on site for 10-15 minutes after the blood is drawn, while a double red donor may leave immediately after.
What I found compelling to describe is the sensation of the saline and plasma being returned into the body. Since, in the centrifuge machine, the liquids assimilate themselves to room temperature, they enter the body with a cooling sensation, which immediately felt in the arm.
If you would, clench your jaws, feeling your molars lock in place together. Still clenched, pick out with your mind the muscles that have become hard with the contraction. Ok, release. After a few moments of feeling the chill in my arm, I suddenly felt a chill come over those muscles, and then throughout most of my mouth. I asked the nurse about this, and she said it was normal - some people feel it all the way from head to toe. Shortly after she said this, I felt the saline trickle into my neck, and shivered.
As I was leaving, I could taste the saline - not only did I know it was saline for the obvious reason, but because the taste matched the smell. It’s just what you’d expect.
If you don’t give blood, and you’re eligible to do so, you should. Whether you currently give blood or not, you should consider a double red donation. The Red Cross personnel said clearly that it was more beneficial than whole blood donations, since the red cells are usually the critical component in blood transfusions. More information here.
And, if you are already giving blood and considering the double red donation, also consider that it’ll probably save you time, in the long run - double red donations are usually made by appointment, and while the procedure takes a little longer than a whole blood donation, you give in one sitting what a whole blood donor gives in two sittings.
