Segmented polyurethane is one of the most widely used biomedical polymers for the blood contacting surface of both the total artificial heart (TAH), and left ventricular assist device (LVAD). Dispite excellent mechanical and surface characteristics, the high water permeability of this material has been criticized by several investigators. In order to precisely and continuously measure the water transmission through a polyurethane membrane, the authors designed a special diffusion cell and permeability system that simulated conditions at the blood-polyurethane interface. This system provided precise control of membrane boundary conditions and allowed calculation of the effective diffusion coefficient by the lag time method.
|Title of host publication
|Transactions of the Annual Meeting of the Society for Biomaterials in conjunction with the Interna
|Soc for Biomaterials
|Number of pages
|Published - 1985
All Science Journal Classification (ASJC) codes
- General Materials Science