Low profile electrodes for a shock wave catheter
Inventors
Assignees
Interested in licensing this patent?
MTEC can help explore whether this patent might be available for licensing for your application.
Publication Number
US-12232752-B2
Publication Date
2025-02-25
Expiration Date
Abstract
The invention provides a device for generating shock waves. The device may comprise an elongated tube and a conductive sheath circumferentially mounted around the elongated tube. The device may further comprise first and second insulated wires extending along the outer surface of the elongated tube. A portion of the first insulated wire is removed to form a first inner electrode, which is adjacent to a first side edge of the conductive sheath. A portion of the second insulated wire is removed to form a second inner electrode, which is adjacent to a second side edge of the conductive sheath. Responsive to a high voltage being applied across the first inner electrode and the second inner electrode, a first shock wave is created across the first side edge and the first inner electrode, and a second shock wave is created across the second side edge and the second inner electrode.
Core Innovation
The invention provides a low-profile shock wave catheter/electrode device for treating calcified lesions in vessels. The device includes an elongated tube and a member sealed to a distal end of the elongated tube that is fillable with a conductive fluid, together with a shock wave generation station within the member.
The shock wave generation station includes a conductive sheath circumferentially mounted around the elongated tube and at least two wires passing at least partially through the conductive sheath. Each wire has an exposed portion defining an electrode that is spaced apart from the conductive sheath by a gap, and applying a high voltage across the wires causes current to flow between each electrode and the conductive sheath to create a separate shock wave at each gap.
The invention further supports multi-sheath and multi-wire configurations with multiple shock wave generation locations within the same device. The configuration includes laterally spaced shock wave generation stations and channel-based activation using one or more high voltage channels, including sequential operation across channels, while maintaining a low crossing profile for vascular navigation.
Claims Coverage
The independent claims (three total) cover methods for treating calcified lesions by advancing a shock-wave generating device into a patient vessel, generating separate shock waves at wire/electrode and conductive sheath gaps using high voltage, and then removing the device. The inventive features center on the conductive sheath circumferential mounting, electrode definition by exposed wire portions spaced from the sheath by a gap, and the positioning of electrodes relative to sheath ends or sheath straight edges.
Shock-wave treatment of calcified lesions with wire-defined electrodes spaced from a conductive sheath by a gap
A method for treating calcified lesions comprising advancing a device for generating shock waves into a vessel of a patient, where the device includes an elongated tube; a member sealed to a distal end of the elongated tube fillable with a conductive fluid; and a shock wave generation station with a conductive sheath circumferentially mounted around the elongated tube and at least two wires passing through the conductive sheath between an outer surface of the elongated tube and an inner surface of the conductive sheath, each wire having an exposed portion defining an electrode spaced apart from the conductive sheath by a gap, applying a high voltage across the wires to create a separate shock wave at each gap, and removing the device from the vessel.
Electrodes adjacent different ends of the conductive sheath to form separate shock waves at respective gaps
A method for treating calcified lesions comprising advancing a device having the same general shock wave station structure of an elongated tube, a member sealed to the distal end fillable with a conductive fluid, a conductive sheath circumferentially mounted around the elongated tube, and at least two wires passing through the conductive sheath with exposed portions defining electrodes spaced apart from the conductive sheath by a gap, where the electrodes defined by the at least two wires are located adjacent different ends of the conductive sheath, applying a high voltage across the wires to create a separate shock wave at each gap, and removing the device from the vessel.
Electrodes adjacent a straight edge of the conductive sheath to create separate shock waves at each gap
A method for treating calcified lesions comprising advancing a device having the same general shock wave station structure of an elongated tube, a member sealed to the distal end fillable with a conductive fluid, a conductive sheath circumferentially mounted around the elongated tube, and at least two wires passing through the conductive sheath with exposed portions defining electrodes spaced apart from the conductive sheath by a gap, where each electrode is adjacent a straight edge of the conductive sheath, applying a high voltage across the wires to create a separate shock wave at each gap, and removing the device from the vessel.
Across the independent claims, the core claim coverage is a shock-wave generating device used in a method for treating calcified lesions, where separate shock waves are created at electrode-to-sheath gaps by applying high voltage to electrodes defined by exposed portions of wires passing through a circumferential conductive sheath, with electrode placement constrained by the location relative to sheath ends or sheath straight edges.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
Interested in licensing this patent?