Sorry, I was at Dr's most of yesterday and just now saw this. The patients died from infection at the port site. I was confused by this and the Dr said that the patients all got a staph infection. They don't do plasma exchange where I live so my primary neuro sent me to Baptist Hosp where it is done and the Dr. there is the one who wouldn't do it. Plasma Exchange did NOT kill the patients, it was the staph infection that did it. I am thinking of trying for it anyway.