Plasmapharesis is used in all of the following except
Plasmapheresis of the autologuous and exchange types is used to treat a variety of disorders, including those of the immune system, such as Goodpasture's syndrome, Guillain-Barre syndrome, lupus, Polymyositis , myasthenia gravis, and thrombotic thrombocytopenic purpura. Ref - pubmed.com
Myaesthenic crisis
Cholinergic crisis
Gullian Barre syndrome
Polymyositis
Immune system