Varni corporation offers a wide range of biocompatible, polysulfone dialyzers to meet the clinical needs of all patient types. Proven technology, world-class quality and consistent performance has Supply Fresenius, Nipro, Gambro, B Braun Polysulfone dialyzers the number one prescribed brand . Optiflux Advanced Fresenius Polysulfone dialyzers. Advanced Fresenius Polysulfone. Electron beam or EtO sterilization. High small and middle molecule clearance. Excellent endotoxin barrier. Available in High Flux and Low Flux. Hemoflow Polysulfone Dialyzers: Fresenius Polysulfone. Electron beam, EtO or Steam sterilization. Available primarily in Low Flux and/or Low Volume with limited. High Flux versions.