Prosorba column

{{Short description|Plasma filtering device}}

The Prosorba Column is a plasma filtering device used to treat severe cases of rheumatoid arthritis or psoriatic arthritis.{{Citation |title=Prosorba column |date=2004 |work=Rheumatology and Immunology Therapy |pages=731–732 |editor-last=Moreland |editor-first=Larry W. |url=http://link.springer.com/10.1007/3-540-29662-X_2231 |access-date=2024-03-08 |place=Berlin/Heidelberg |publisher=Springer-Verlag |language=en |doi=10.1007/3-540-29662-x_2231 |isbn=978-3-540-20625-5|url-access=subscription }} Its active element is Protein A bonded to a diatomaceous earth/clay bead.{{cite book |title=The Everything Health Guide to Arthritis |last=Eustice |first=Carol |author2=Scott J. Zashin |year=2007 |publisher=Everything Books |isbn=978-1-59869-410-9 |pages=[https://archive.org/details/everythinghealth0000eust/page/111 111–113] |url=https://archive.org/details/everythinghealth0000eust/page/111 }} The effect of the Protein A is to remove circulating immune complexes responsible for the autoimmune joint deterioration process.

The device was originally manufactured by Imre Corp and approved by the FDA in 1987.{{cite web|title=Drug Discovery in Seattle 2015: An Updated History {{!}} Xconomy|url=http://www.xconomy.com/seattle/2015/08/03/drug-discovery-in-seattle-2015-an-updated-history/3/|website=Xconomy|accessdate=5 May 2016|language=en-US|date=3 August 2015}} The Prosorba Column went out of production at the end of 2006.