CELL-FRIENDLY CANNULA AND NEEDLE

摘要

An improved cannula and method for making the same are disclosed. The cannula includes a lumen having a polished inner surface, and a first hydrophilic coating on the polished inner surface of the lumen. The cannula can also include a polished outer surface, and a second hydrophilic coating on the polished outer surface. The first and second hydrophilic coatings can be one of a form of hydrogel or other hydrophilic polymer. The polishing is preferably done by one of several extrusion processes.