公开(公告)号：EP1126899A1

公开(公告)日：2001-08-29

申请号：EP99971339.9

申请日：1999-11-02

申请人： Stereotaxis, Inc.

发明人： RITTER, Rogers, C. ,  GARIBALDI, Jeffrey, M. ,  WOLFERSBERGER, Charles ,  CREIGHTON, Francis, M. ,  WERP, Peter, R. ,  HOGG, Bevil, J. ,  BLUME, Walter, M.

IPC分类号： A61N2/02

CPC分类号： A61B34/73 ,  A61B6/0457 ,  A61B6/4441 ,  A61B34/70 ,  A61B2034/733

摘要： The magnetic coils (72, 74, 76) are arranged to provide a magnetic force within an operating region sufficient to move a magnetic medical device within that portion of a patient inside the operating region.

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.

公开(公告)号：EP1005384A1

公开(公告)日：2000-06-07

申请号：EP98906564.4

申请日：1998-02-17

申请人： STEREOTAXIS, INC.

发明人： WERP, Peter, R. ,  RITTER, Rogers, C. ,  BLUME, Walter, M.

IPC分类号： A61M37/00

CPC分类号： A61M25/0127

摘要： A catheter and magnet combination (20) adapted for intra-parenchymal positioning of the catheter (22) in the body with a magnetic field. The catheter (22) has proximal and distal ends ((26, 28), respectively) and a lumen (30) therebetween. A magnet (24) is disposed in the distal end of the lumen (30) so that the distal end of the catheter (22) can be positioned within the body with the aid of an externally applied magnetic field. A tether (32) is attached to the magnet (24) and extends through the lumen (30) and out the proximal end (26) so that the magnet (24) can be removed from the catheter (22) through the lumen (30) once the distal end of the catheter (22) is properly positioned. In one embodiment of the invention, the tether (32) is sufficiently stiff to be able to push the catheter (22) through the tissue. With this embodiment, the magnetic field orients the magnet (24), and thus the tip (36) of the catheter (22), and some or all of the force for moving the catheter (22) is applied via the tether (32).