| 摘要 |
A fixed wire catheter (110) having a torque-transmitting shaft, a flexible body surrounding the shaft (112), and an inflatable balloon (116) having a proximal end mounted on the flexible body is disclosed, where the torque-transmitting shaft is comprised of a unitary core wire (1). Also a unitary guidewire is disclosed. Usually the core wire or guidewire is comprised of a cylindrical main shaft (2), a flat distal portion (4), and a cylindrical distal tip (6), but it may have a tapered portion (8) between the shaft and the flat portion. The distal end is larger in cross-sectional area than the cross-sectional area of the flat portion, and the section connecting the two is usually tapered and preferably rolls outward toward the distal end. The catheter includes a tip spring (14) having a proximal end fixedly mounted to the shaft proximal to the distal end of the balloon and a distal end fixedly attached to the distal end of the shaft. |
