| 摘要 |
The stent having an extruded covering of the present invention, and method of making the same, provides a stent 112 having stent elements 116 forming cells 118 , and a covering 114 disposed on the stent 112 . The seamless covering 114 encloses the stent elements 116 and the cells 118 . The stent having an extruded covering is fabricated by compressing a stent assembly radially 252 , applying molten polymer to the stent elements and cells 254 , expanding the stent assembly radially to form a covering 252 , and cooling the stent assembly 254 . The stent assembly can then be separated into individual stents. The compression can be performed by drawing the stent assembly through a contracting die 154 and the molten polymer can be applied in an extruder 156 . Before or after separating the stent assembly into individual stents, post treatment can be performed or coatings applied.
|
