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US 12,458,426 B2Granted
Electrosurgical instrument
AssigneeCreo Medical Limited
InventorsChristopher Paul Hancock, Patrick Burn, Pallav Shah
Life of this patent
Estimating the term…
Abstract
An electrosurgical instrument having a radiating tip with enhanced flexibility. In a first aspect, this is achieved by shaping the dielectric material in the radiating tip to facilitate bending of the radiating tip. In a second aspect, this is achieved by forming a dielectric body and outer sheath of the radiating tip as separate parts, to enable movement and flexure between the parts. By improving the flexibility of the radiating tip, manoeuvrability of the electrosurgical instrument may be improved.
Claims19
An electrosurgical instrument comprising:
- a coaxial feed cable for conveying microwave energy or radiofrequency energy, the coaxial feed cable having an inner conductor, an outer conductor, and a dielectric material separating the inner conductor and the outer conductor;
- and
- a radiating tip disposed at a distal end of the coaxial feed cable to receive the microwave energy or the radiofrequency energy, the radiating tip comprising:
- an energy delivery structure configured to deliver the microwave energy or the radiofrequency energy received from the coaxial feed cable from an outer surface of the radiating tip, wherein the energy delivery structure comprises an elongate conductor electrically connected to the inner conductor and extending in a longitudinal direction beyond the distal end of the coaxial feed cable;
- and
- a dielectric body disposed around the elongate conductor of the energy delivery structure, wherein the elongate conductor extends within a channel in the dielectric body;
- wherein the dielectric body comprises a cavity therein, the cavity being disposed adjacent to the channel within which the elongate conductor extends to facilitate flexure of the radiating tip,
- wherein the radiating tip further includes an outer sheath disposed around a radially outer surface of the dielectric body, wherein the outer sheath is separate from the dielectric body to allow relative movement between the outer sheath and the dielectric body.
5 more elements
An electrosurgical instrument comprising:
- a coaxial feed cable for conveying microwave energy and/or radiofrequency energy, the coaxial feed cable having an inner conductor, an outer conductor, and a dielectric material separating the inner conductor and the outer conductor;
- and
- a radiating tip disposed at a distal end of the coaxial feed cable to receive the microwave energy and/or the radiofrequency energy, the radiating tip comprising:
- an energy delivery structure configured to deliver the microwave energy and/or the radiofrequency energy received from the coaxial feed cable from an outer surface of the radiating tip, wherein the energy delivery structure comprises an elongate conductor electrically connected to the inner conductor and extending in a longitudinal direction beyond the distal end of the coaxial feed cable;
- and
- a dielectric body disposed around the elongate conductor of the energy delivery structure, wherein the elongate conductor extends within a channel in the dielectric body;
- wherein the dielectric body comprises a cavity therein, the cavity being disposed adjacent to the channel within which the elongate conductor extends to facilitate flexure of the radiating tip;
- wherein the cavity is formed by an indentation in the dielectric body, wherein the indentation forms a circumferential groove extending around the dielectric body, such that the groove forms a loop around a circumference of the dielectric body, or the groove has a helical shape such that the groove winds around the dielectric body along a length of the dielectric body.
5 more elements
An electrosurgical instrument comprising:
- a coaxial feed cable for conveying microwave energy and/or radiofrequency energy, the coaxial feed cable having an inner conductor, an outer conductor, and a dielectric material separating the inner conductor and the outer conductor;
- and
- a radiating tip disposed at a distal end of the coaxial feed cable to receive the microwave energy and/or the radiofrequency energy, the radiating tip comprising:
- an energy delivery structure configured to deliver the microwave energy and/or the radiofrequency energy received from the coaxial feed cable from an outer surface of the radiating tip, wherein the energy delivery structure comprises an elongate conductor electrically connected to the inner conductor and extending in a longitudinal direction beyond the distal end of the coaxial feed cable;
- and
- a dielectric body disposed around the elongate conductor of the energy delivery structure, wherein the elongate conductor extends within a channel in the dielectric body:
- wherein the dielectric body comprises a cavity therein, the cavity being disposed adjacent to the channel within which the elongate conductor extends to facilitate flexure of the radiating tip;
- wherein the cavity is formed by an indentation in the dielectric body,
- wherein the dielectric body includes a corrugated surface, and wherein the indentation is formed by corrugations in the corrugated surface.
6 more elements
An electrosurgical instrument comprising:
- a coaxial feed cable for conveying microwave energy and/or radiofrequency energy, the coaxial feed cable having an inner conductor, an outer conductor, and a dielectric material separating the inner conductor and the outer conductor;
- and
- a radiating tip disposed at a distal end of the coaxial feed cable to receive the microwave energy and/or the radiofrequency energy, the radiating tip comprising:
- an energy delivery structure configured to deliver the microwave energy and/or the radiofrequency energy received from the coaxial feed cable from an outer surface of the radiating tip, wherein the energy delivery structure comprises an elongate conductor electrically connected to the inner conductor and extending in a longitudinal direction beyond the distal end of the coaxial feed cable;
- and
- a dielectric body disposed around the elongate conductor of the energy delivery structure, wherein the elongate conductor extends within a channel in the dielectric body;
- wherein the dielectric body comprises a cavity therein, the cavity being disposed adjacent to the channel within which the elongate conductor extends to facilitate flexure of the radiating tip;
- wherein the energy delivery structure comprises a distal electrode and a proximal electrode disposed on a surface of the dielectric body, the distal electrode and the proximal electrode being physically separated from each other by an intermediate portion of the dielectric body;
- wherein the proximal electrode is electrically connected to the outer conductor;
- and
- the distal electrode is electrically connected to the inner conductor via the elongate conductor.
8 more elements
Dependencies are inferred from the claim text.