Magnetically guided catheters

摘要

A magnetically-guided catheter includes a tip positioning magnet in the distal electrode assembly configured to interact with externally applied magnetic fields for magnetically-guided movement. A magnetically-guided mapping catheter includes an electrically-conductive capsule in the form of a casing that includes a distal ablation surface and isolates the positioning magnet from bio-fluids to prevent corrosion. An open irrigation ablation catheter includes an isolated manifold that isolates the positioning magnet from contact with irrigation fluid to prevent corrosion.

主权项

1. A method of manufacturing a multi-segment magnet, comprising the steps of:
providing a thin-walled cylindrical retention sleeve having an inside surface with an inside diameter corresponding to an outside diameter of said multi-segment magnet; producing a plurality of segments each comprising magnetic material; magnetizing said plurality of segments in accordance with a predetermined magnetization strategy; applying an adhesive to respective engagement surfaces of said plurality of segments; inserting said segments having applied adhesive in said sleeve in a predetermined arrangement; curing said adhesive to thereby produce said multi-segment magnet; and after said curing said adhesive is complete, removing said multi-segment magnet from said sleeve.