| 摘要 |
This is a surgical device. In particular, it is a composite catheter assembly suitable for accessing a tissue target within the body, typically a target which is accessible through the vascular system. Central to the invention is the presence in the catheter assembly of a catheter section having a braided metallic reinforcing member, typically of superelastic alloy ribbon, situated within the reinforced catheter section in such a way to create a catheter having an exceptionally thin wall, controlled stiffness, high resistance to kinking, and complete recovery in vivo from kinking situations. The braid may have a single pitch or may vary in pitch along the axis of the catheter or catheter section. The braided ribbon reinforcing member typically is placed between a flexible outer tubing member and an inner tubing member to produce a catheter section which is very flexible but highly kink resistant. At least a proximal portion or section of the catheter assembly is a section made of a stiff polymeric or metallic tubing member.
|
