Medical device e.g. puncture cannula for endoscopy, has recesses formed by closed recessed channels, and having additional uneven channel extensions, where channels and extensions are formed by applying running process

摘要

The device has recesses formed by one or more closed recessed channels which have zigzag or wavy shape. The width of the recessed channels (Vk) is between 0.01 and 0.2 millimeters. The recesses stretch over a part of a device surface. The recesses have additional uneven channel extensions on their external borders in the longitudinal direction. The channels and the extensions are formed by applying a continuous running process.