Triple coil catheter support
AssigneeSt. Jude Medical, Cardiology Division, Inc.
InventorsSameer D. Pai, Zachary L. Helgeson, Troy T. Tegg
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Abstract
A catheter with three distinct compression resistance coils, including a body coil and two pull wire coils, is disclosed. The triple coil system can provide maximal resistance to compression of the catheter's proximal shaft, as well as maximization of the curve angle that the catheter tip can achieve. Additionally, the tri-coil catheter can allow for a lower initial compression load and a more flexible proximal shaft. A gap between the outer diameter of the pull wire and the inner diameter of the pull wire compression coil that is equal to about 10-30% of inner diameter of the pull wire compression coil can provide optimal catheter performance.
Claims10
A steerable catheter comprising
- a shaft comprising a proximal end, a distal end, and a central lumen;
- a distal deflectable section of the shaft, the distal deflectable section comprising a proximal end and a distal end;
- a body compression coil surrounded by the shaft and extending through the central lumen from the proximal end of the shaft to the proximal end of the distal deflectable section;
- at least one pull wire extending through the body compression coil from the proximal end of the shaft to the proximal end of the distal deflectable section;
- and
- a pull wire compression coil surrounding the pull wire within the body compression coil, the pull wire compression coil extending from the proximal end of the shaft and terminating within the proximal end of the distal deflectable section;
- wherein a gap between an outer diameter of the pull wire and an inner diameter of the pull wire compression coil is about 10%-30% of the inner diameter of the pull wire compression coil.
Dependencies are inferred from the claim text.