JPWO2019228928A5

JPWO2019228928A5 -

Info

Publication number: JPWO2019228928A5
Application number: JP2020566758A
Authority: JP
Publication date: 2022-05-20
Anticipated expiration: 2039-05-24

Claims

A coaxial feeding cable for transmitting microwave energy and high frequency energy, wherein the coaxial feeding cable includes an inner conductor, an outer conductor, and a first dielectric material that separates the inner conductor and the outer conductor. With the cable
A radiation tip located at the distal end of the coaxial cable to receive the microwave energy and the high frequency energy.
A tip body made of a second dielectric material, a proximal end to which the tip body is connected to the distal end of the coaxial feeding cable, and a distal end facing the coaxial feeding cable. A first electrode and a second electrode arranged on the tip body and the end face of the tip body, wherein the tip body has an end face at the distal end of the tip body. The first electrode and the second electrode, wherein the second electrode is separated from the first electrode by a part of the exposed second dielectric material.
With the radiation tip, including
It is an electric surgical instrument equipped with
The first electrode is electrically connected to the internal conductor of the coaxial feeding cable by a conductive element extending through a channel in the tip body .
The second electrode is electrically connected to the outer conductor of the coaxial cable by an electric field shaping conductive structure formed in the tip body or on the tip body.
The first electrode and the second electrode are configured as an active electrode and a return electrode to deliver the high frequency energy.
The conductive element and the electric field shaping conductive structure are configured as an antenna to emit the microwave energy.
The electric field shaping conductive structure is configured to shape the radiation profile of microwave energy emitted from the radiation tip.
The electric surgical instrument.

The electric surgical instrument according to claim 1, wherein the electric field shaping conductive structure includes an elongated conductor extending along the length of the radiation tip portion.

The electrosurgical instrument according to claim 1, wherein the electric field shaping conductive structure includes a conductive structure with a slot formed around the conductive element.

The third aspect of the present invention, wherein the slotted conductive structure includes a spiral conductive element that is wound around an outer surface of the tip body to form a spiral slot in which the second dielectric material is exposed. Electric surgical instrument.

The electrosurgical instrument of claim 4, wherein the pitch of the spiral slots varies along the length of the conductive structure.

The electrical surgery of claim 4 or 5, wherein the width of the spiral slot is tapered as it extends toward or away from the distal end of the distal end body. Instrument.

The electrical surgery according to any one of claims 3 to 5, wherein the slotted conductive structure comprises a slot having a width of about one tenth of the wavelength of the microwave energy in a living tissue. Instrument.

The electrosurgical instrument of claim 3, wherein the slotted conductive structure comprises a plurality of slots for emitting the microwave energy.

The electrosurgical instrument according to claim 8, wherein each of the plurality of slots has the same width, and the slots are arranged at equal intervals along the longitudinal direction of the radiation tip portion.

The electrosurgical instrument according to claim 8, wherein each of the plurality of slots has a different width, and the plurality of slots are arranged along the longitudinal direction of the radiation tip portion in the order of increasing the width.

The electrosurgical instrument according to any one of claims 1 to 10 , wherein the conductive element includes a distal portion of an internal conductor that projects through the tip body and connects to the first electrode.

11. The electrosurgical instrument of claim 11, wherein the first electrode is an exposed distal tip of the distal portion of the internal conductor.

The electrosurgical instrument according to any one of claims 3 to 12, wherein the slotted conductive structure is formed on the outer surface of the tip body.

The electrosurgical instrument according to any one of claims 3 to 13, wherein the slotted conductive structure is formed on the tip body by an extension of the external conductor.

The one according to any one of claims 3 to 13, wherein the slotted conductive structure is electrically connected to the outer conductor by a conductive ring arranged at the distal end of the coaxial feeding cable. Electric surgical instruments.

The electrosurgical instrument according to any one of claims 1 to 15, wherein the tip body is cylindrical.

The electrosurgical instrument according to any one of claims 1 to 16 , wherein the end face of the tip body is in a plane perpendicular to the longitudinal axis of the coaxial feeding cable.

The electrosurgical instrument according to any one of claims 1 to 16, wherein the end face of the tip body has a dome shape or a conical shape.

The electrosurgical instrument according to any one of claims 1 to 18 , wherein the second electrode is a conductive ring surrounding the first electrode.

The electrosurgical instrument according to claim 19, wherein the outer diameter of the second electrode is substantially the same as the outer diameter of the tip body.

The second electrode includes a conductive cap mounted on the distal end of the tip body, the cap being the end face of the tip body except for an exposed aperture to which the first electrode is exposed. The electric surgical instrument according to any one of claims 1 to 20, which covers the above-mentioned.

Electrosurgical generators arranged to supply microwave energy and high frequency energy,
The electric surgical instrument according to any one of claims 1 to 21, which is connected to receive the microwave energy and the high frequency energy from the electric surgical generator.
Including electrosurgical system.

A surgical scoping device including a flexible insertion cord for insertion into the patient's body is further provided, the flexible insertion cord includes an instrument channel extending along its length, and the electrosurgical instrument is said instrument. 22. The electrosurgical system of claim 22, which is formed in a size that fits within the channel.