Abstract 378 The surface roughness of 4 biliary stents. Ra value is the average of 3 measurements from 10μm2 AFM images; standard deviation of the data is shown in the brackets
| Material | Manufacturer | Design | Roughness Ra (nm) |
|---|---|---|---|
| Teflon | Wilson Cook | Soehendra Tannenbaum-type | 30.43 (6.76) |
| Teflon | Olympus | Doublelayer, Tannenbaum type | 13.26 (2.09) |
| Polyethylene | Wilson-Cook | Amsterdam-type, Cotton Leung | 30.00 (5.04) |
| Polyethylene | Boston Scientific | Amsterdam-type, Rapid Exchange | 248.75 (24.5) |