Hello @betoma, Welcome to Connect. I'm not sure @larrymc saw your reply to his post. He did share an update in another discussion here - https://connect.mayoclinic.org/comment/608152/. There is another discussion started by @rwinney on plasmapheresis you might find helpful -- Plasmapheresis - anyone had success?: https://connect.mayoclinic.org/discussion/plasmapherisis-anyone-had-success/

There is also a YouTube video from Apr 6, 2010 by Brian Weinshenker, M.D., a Mayo Clinic neurologist, describes the process of plasma exchange in treatment.

Are you able to share a little more about your symptoms and anything you have found helps a little?