MICRO CATHETER

摘要

A catheter and a micro catheter (10) for nerve intervention are provided. The catheter wall includes a smooth layer (23), a reinforcing layer (24) and a coating layer (25), in the order from inside and outwards. The smooth layer (23) and the coating layer (25) both are made of polymers. The reinforcing layer (24) is a supporting layer, and attached to the smooth layer (23) and the coating layer (25) respectively, so as to connect every layer of the catheter together. The catheter includes a proximal portion (11) and an extension portion along the direction from proximal to distal end. The reinforcing layer (24) assumes weave structure at the proximal portion (11), and assumes spiral structure at the extension portion.