A hemodialyzer apparatus comprises a reusable dialyzer membrane as well as reusable blood flow path and dialysis flow path units. The apparatus automatically primes itself and makes dialysis solution from dry chemicals, concentrates, and fresh water which is provided to the apparatus. Also, after use,...http://www.google.com/patents/US6146536?utm_source=gb-gplus-sharePatent US6146536 - Method of preparing a batch of dialysis solution