Catheter guide assembly

摘要

A catheter guide assembly (3) is provided having a magnet support for mounting to a catheter; at least two permanent magnets (1A+1B, 2) mounted to the support; and a control system (4). The control system (4) is used to adjust the relative magnetisation directions of the permanent magnets between a first configuration in which their direction of magnetisation are such that the magnets generate a relatively large resultant magnetic field, and a second configuration in which their directions of magnetisation are such that the magnets generate a relatively small resultant magnetic field.