Back to results
US 5,733,323 AGranted
Electrically conductive unipolar vascular sheath
AssigneeCordis Corporation
InventorsJerrick Buck, Daniel S. Goldman, Donald J. Larnard
Life of this patent
Estimating the term…
Abstract
An electrically conductive sheath introducer is provided which functions as a unipolar electrode as well as a percutaneous vascular sheath introducer for a catheter. Typically, the catheter will include an electrode at its distal portion, and a circuit will be developed which includes the electrode of the catheter and the electrically conductive sheath introducer. Various electrical procedures are thus possible, including recording and energy delivery. The sheath introducer is rendered electrically conductive by ion process deposition treatment of the polymeric material sheath with a metallic material or materials. The resulting electrically conductive sheath introducer exhibits an incredibly low resistivity and resistance.
Claims29
An electrically conductive percutaneous unipolar vascular sheath introducer, comprising:
- an elongated conductive cannula shaft having a generally cylindrical shaft component made of polymeric material, said elongated conductive cannula shaft having a proximal end portion, a distal end portion, an elongated generally cylindrical outer surface and an elongated generally cylindrical inner surface defining an elongated bore for receiving a catheter;
- a hub secured to said proximal portion of the elongated conductive cannula shaft;
- said elongated generally cylindrical outer surface is an electrically conductive surface which is an adherent thin metallic material film;
- a conductor lead electrically connected to said elongated electrically conductive generally cylindrical outer surface, said elongated conductive cannula shaft being an indifferent electrode having a surface area substantially coincident with at least said elongated generally cylindrical outer surface;
- and
- said metallic material film is a multilayered film having an internal silver layer of exceedingly low resistivity and an outer gold layer of low resistivity and exceedingly high inertness, the resistivity of the internal layer being less than the resistivity of the outer layer, and the inertness of the outer layer being greater than that of the internal layer.
3 more elements
An electrically conductive percutaneous unipolar vascular sheath introducer, comprising:
- an elongated conductive cannula shaft having a generally cylindrical shaft component made of polymeric material, said elongated conductive cannula shaft having a proximal end portion, a distal end portion, an elongated generally cylindrical outer surface and an elongated generally cylindrical inner surface defining an elongated bore for receiving a catheter;
- a hub secured to said proximal portion of the elongated conductive cannula shaft;
- said elongated generally cylindrical outer surface is an electrically conductive surface which is an adherent thin metallic material film;
- a conductor lead electrically connected to said elongated electrically conductive generally cylindrical outer surface, said elongated conductive cannula shaft being an indifferent electrode having a surface area substantially coincident with at least said elongated generally cylindrical outer surface;
- and
- said elongated generally cylindrical inner surface is an electrically conductive surface which is an adherent thin metallic material film, and said electrically conductive inner surface is included in said indifferent electrode, said indifferent electrode having a surface area substantially coincident with both said elongated outer surface and said elongated inner surface.
3 more elements
A catheter and sheath introducer assembly, comprising:
- a catheter having an elongated flexible shaft, a hub at a proximal portion thereof, and an electrode at a distal portion thereof;
- an electrically conductive percutaneous vascular sheath introducer including:
- an elongated conductive cannula shaft having a generally cylindrical shaft component made of polymeric material, said elongated conductive cannula shaft having a proximal end portion, a distal end portion, an elongated generally cylindrical outer surface and an elongated generally cylindrical inner surface defining an elongated bore for receiving said catheter,
- a hub secured to said proximal portion of the elongated conductive cannula shaft,
- said elongated generally cylindrical outer surface is an electrically conductive surface which is an adherent thin metallic material film,
- a conductor lead electrically connected to said elongated electrically conductive generally cylindrical outer surface, said elongated conductive cannula shaft being an indifferent electrode having a surface area substantially coincident with at least said elongated generally cylindrical outer surface;
- said conductor lead is adapted to be electrically connected to a circuit external of a patient's body, and said indifferent electrode is adapted to be a component of an electrical circuit passing through patient's body between the electrode of the catheter and the elongated conductive cannula shaft, wherein the metallic surface is a textured metallic surface which is mechanically bonded and chemically bonded by chemical vapor deposition ion beam bombardment to said elongated generally cylindrical outer surface of the shaft component made of polymeric material;
- and
- said elongated generally cylindrical inner surface includes an electrically conductive surface which is an adherent thin metallic material film, and said inner electrically conductive surface is included in said indifferent electrode.
6 more elements
Dependencies are inferred from the claim text.