They centrifuge your blood, keep the plasma, and return the red blood cells, yes. The centrifuge does not separate the PFAS, so it remains in the plasma when they take it.
The concentration of PFAS in the plasma remains similar to the concentration in your remaining blood; as your body replaces the plasma, the concentration falls.
I was really interested in the machine they use. They have a disposable tubing/centrifuge kit. The machine uses peristalsis to move blood/plasma through the setup. They repeatedly withdraw a relatively small amount of blood, spin it, pull off most of the plasma, then reverse the flow and put the RBCs back. The tubing passes through a couple optical sensors to detect and stop the pump before pushing air bubbles. It has pressure sensors to detect low flow rates to or from your body.
At the end, it transfuses some saline to replace some of your blood volume. If you avoid high-traffic times, the whole process takes 30 to 90 minutes while you sit still and watch Netflix on your phone.
Don’t they put the blood back in you after taking the plasma out of it?
They centrifuge your blood, keep the plasma, and return the red blood cells, yes. The centrifuge does not separate the PFAS, so it remains in the plasma when they take it.
The concentration of PFAS in the plasma remains similar to the concentration in your remaining blood; as your body replaces the plasma, the concentration falls.
I was really interested in the machine they use. They have a disposable tubing/centrifuge kit. The machine uses peristalsis to move blood/plasma through the setup. They repeatedly withdraw a relatively small amount of blood, spin it, pull off most of the plasma, then reverse the flow and put the RBCs back. The tubing passes through a couple optical sensors to detect and stop the pump before pushing air bubbles. It has pressure sensors to detect low flow rates to or from your body.
At the end, it transfuses some saline to replace some of your blood volume. If you avoid high-traffic times, the whole process takes 30 to 90 minutes while you sit still and watch Netflix on your phone.