公开(公告)号：EP1223883A4

公开(公告)日：2007-10-17

申请号：EP00978896

申请日：2000-10-03

申请人： STEREOTAXIS INC

发明人： RITTER ROGERS C ,  HOGG BEVIL J ,  WERP PETER R ,  CREIGHTON FRANCIS M IV ,  BLUME WALTER M ,  HASTINGS ROGER N

IPC分类号： A61B1/005 ,  A61B1/01 ,  A61M25/01 ,  A61B19/00

CPC分类号： A61B1/00158 ,  A61B1/01 ,  A61B34/73 ,  A61M25/0105 ,  A61M25/0127

摘要： A method of turning a medical device (44), having a magnetically responsive element (46) associated with its distal end, at an operating point (42) within an operating region (40) inside a patient's body from an initial direction to a desired final direction, through the movement of at least one external source magnet (38). The at least one external source magnet (38) is moved in such a way as to change the direction of the distal end of the magnetic medical device (44) from the initial direction to the desired final direction without substantial deviation from the plane containing the initial direction and the desired final direction.

公开(公告)号：EP1488431A4

公开(公告)日：2007-08-15

申请号：EP02807143

申请日：2002-03-19

申请人： STEREOTAXIS INC

发明人： CREIGHTON FRANCIS M IV

IPC分类号： H01F7/02 ,  A61B19/00

CPC分类号： H01F7/0278 ,  A61B34/70

摘要： A magnet assembly comprising a magnet (20) mounted for pivoting about a first axis (A1) spaced from the magnet, and rotating about a second axis (A2) that is perpendicular to and intersects with the first axis (A1). The magnet (20) comprising a plurality of segments (22, 24, 26, 28, 30 and 32) each with a magnetization direction such that through a combination of pivoting and rotating the magnet (20) projects a magnetic field in any direction at an operating point spaced from the front of the assembly. The segmented construction with segments (22, 24, 26, 28, 30 and 32) of different magnetization directions allows small changes in the orientation of the magnet to substantially change the magnet field direction at a system operating point.

公开(公告)号：EP1009312A4

公开(公告)日：2001-06-20

申请号：EP98906588

申请日：1998-02-17

申请人： STEREOTAXIS INC

发明人： WERP PETER R ,  BLUME WALTER M ,  CREIGHTON FRANCIS M IV ,  RITTER ROGERS C

IPC分类号： A61B5/06 ,  A61B6/12 ,  A61B19/00 ,  A61M25/00 ,  A61M25/01 ,  A61M25/095

CPC分类号： A61M25/0127 ,  A61B6/12 ,  A61B34/73 ,  A61B90/10 ,  A61B2034/732 ,  A61B2090/374 ,  A61M25/01

摘要： The movement of a catheter (34) through a medium, which may be living tissue such as a human brain, is controlled by mechanically pushing a flexible catheter (34) having a magnetic tip (30) through the medium, and applying a magnetic field having a magnitude and a direction that guides the mechanically pushed catheter tip (30) stepwise along a desired path. The magnetic field is controlled in a magnetic stereotaxis system (10) by a processor (90) using an adaptation of a PID (proportional, integral, and derivative) feedback method. The magnetic fields are applied by super-conducting coils (Fig. 2), and the currents applied through the coils (Fig. 2) are selected to minimize a current metric.