Directional microwave ablation instrument with off-set energy delivery portion
First Claim
1. A directional ablation instrument for ablation of a targeted tissue, comprising:
- a transmission line having a distal end and a proximal portion suitable for connection to an electromagnetic energy source;
an elongated antenna having an end coupled to the distal end of the transmission line, the elongated antenna adapted to generate an electric field sufficiently strong to cause tissue ablation of the targeted tissue; and
an elongated antenna assembly including a conductive structure disposed about the antenna and having a window therein for directing a majority of the electric field through the window in substantially one radial direction with respect to a central axis of the elongated antenna assembly, the elongated antenna being fixedly located within the elongated antenna assembly with a central axis of the elongated antenna off-set from the central axis of the elongated antenna assembly toward the window therein.
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Accused Products
Abstract
A directional ablation instrument for ablation of a targeted tissue. The instrument includes a transmission line having a proximal portion suitable for connection to an electromagnetic energy source, and an elongated antenna device having a longitudinal axis and an end coupled to the transmission line. The antenna is adapted to generate an electric field sufficiently strong to cause tissue ablation of the targeted tissue. An elongated support assembly includes a central axis, and an ablation surface extending longitudinally along an exterior surface portion of the support assembly. The support assembly is configured to receive the antenna device in the ablation surface such that the longitudinal axis of the antenna device is off-set from the support assembly central axis. Further, the antenna device is oriented toward the surface portion for positioning of the antenna device substantially adjacent to or in contact with the targeted tissue during operable use.
536 Citations
5 Claims
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1. A directional ablation instrument for ablation of a targeted tissue, comprising:
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a transmission line having a distal end and a proximal portion suitable for connection to an electromagnetic energy source;
an elongated antenna having an end coupled to the distal end of the transmission line, the elongated antenna adapted to generate an electric field sufficiently strong to cause tissue ablation of the targeted tissue; and
an elongated antenna assembly including a conductive structure disposed about the antenna and having a window therein for directing a majority of the electric field through the window in substantially one radial direction with respect to a central axis of the elongated antenna assembly, the elongated antenna being fixedly located within the elongated antenna assembly with a central axis of the elongated antenna off-set from the central axis of the elongated antenna assembly toward the window therein. - View Dependent Claims (2)
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3. A directional ablation instrument for ablating of a targeted tissue, comprising:
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at least one ablating element including a RF antenna adapted to emit electromagnetic ablating energy for ablating the targeted tissue in response to applied radio frequency electromagnetic energy; and
an elongated assembly having a central axis and defining a conductive structure about the antenna of the ablation instrument and including a non-conductive window in the conductive structure for directing a majority of the RF ablating energy throught the window in substantially one radial direction with respect to the central axis, the at least one ablating element being fixedly located within the elongated assembly with, the central axis of the at least one ablating element offset toward the window of the elongated assembly.
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4. A directional ablation instrument for ablating target issue, comprising:
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a flexible elongated antenna adapted to generate an electric field sufficiently strong to cause ablation of targeted tissue in response to electromagnetic energy supplied thereto; and
a flexible elongated antenna assembly having an elongated transmission aperture disposed in alignment with a central axis of the assembly, the elongated antenna being fixedly disposed contiguous the transmission aperture and offset from the central axis of the elongated antenna assembly for directing a majority of the electric field in substantially the radial direction with respect to the central axis and through the transmission aperture.
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5. A directional ablation instrument for ablating targeted tissue, comprising:
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an ablating element including an antenna adapted to emit electromagnetic ablation energy for ablating the targeted tissue; and
an electrically conductive elongated assembly fixed disposed about the antenna and having a central axis and forming an outer surface of the ablation instrument, the elongated assembly including an electromagnetic energy transmissin aperture through the outer surface with the antenna disposed contiguous the transmission aperture and offset from the central axis of the elongated assembly for directing a majority of the ablation energy in substantially one radial direction with respect to the central axis and through the transmission aperture.
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Specification