公开(公告)号：EP0725596B1

公开(公告)日：2004-04-07

申请号：EP94932080.8

申请日：1994-10-27

申请人： Boston Scientific Limited

发明人： KOGER, James D. ,  KAPRAVY, Andrew ,  HEATH, Kevin R. ,  CROWLEY, Robert J.

IPC分类号： A61B8/12 ,  A61M25/00 ,  G10K11/35

CPC分类号： A61B8/12 ,  A61B8/4461 ,  A61B2017/00526 ,  A61B2017/22078 ,  A61M25/0045 ,  G10K11/004 ,  G10K11/355 ,  Y10T29/4987 ,  Y10T29/49872

摘要： A shaft (16) having inner members (40) and outer members (42) in interfering contact along their length, at least one of which comprises a wire, at least a portion of which is super-elastic, to achieve substantial mechanical fidelity and resistance to damage. The shaft (16) is placed within a catheter sheath (18). An ultrasound imaging catheter has a hollow catheter shaft, an ultrasound transducer in the shaft, and a drive shaft that rotates the transducer. The shaft comprises at least one metal coil having characteristic elastic deformation under stress in the range of about 3 % to 9 %, while a restraint means prevents torsional deflection of the coil. A drive shaft has a coil surrounded by a tube, a coil bonded to an inner coaxial cable, and an inner and outer coil that interfere with one another.