Plasma Adsorption in Patients With Confirmed COVID-19

"Subjects will receive one treatment per day with the D2000 Cartridge for up to 4 hours (treatment cycle) for up to seven (7) days. Treatment may extend beyond 7 days, up to 14 days total, if deemed necessary and useful by the principal investigator (PI). Additional cartridges may be used, if needed, to achieve the maximum daily treatment duration of 4 hours. Each day, before initiating the treatment cycle, pre-treatment chemistry and hematology, coagulation status, and disease severity scores (SOFA, APACHE II) will be collected. Then, immediately following the therapy on each treatment day, post-therapy measurements will also be collected.~Study Exit. Subjects will be exited from the study after the Day 28 follow-up visit which will occur 28 days after Study Day 1. Subjects will be included in the study for a total of 28 days. Subjects may also choose to discontinue at any time or conclude participation at the discretion of the PI or the subject's treating physician."