US-12622739-B2 - Electrode with conduit and treatment tool

Abstract

An electrode with a conduit includes: a tubular portion internally provided with a first conduit; a distal end portion provided at the distal end of the tubular portion; a second conduit that is provided inside the distal end portion, the second conduit being configured to communicate with the first conduit; an opening configured to communicate with the first conduit and the second conduit; a first hemostatic surface that has a flat surface extending from the distal end of the tubular portion in an extending direction of the second conduit, and serves as an electrode configured to cause a high-frequency current to flow through a biological tissue; and a second hemostatic surface that is connected to a distal end side of the first hemostatic surface and is provided at an end portion protruding toward a distal end side from the opening.

Inventors

• Tsubasa Kadowaki
• Ryu YORITA
• Ojiro KITAMURA
• Yohei Motoki
• Sho Ogawa
• Tadashi Kitayama
• Naoki Otaka

Assignees

• OLYMPUS CORPORATION

Dates

Publication Date

20260512

Application Date

20220302

Claims (20)

1. 1 . An electrode comprising: a tubular portion that includes a first conduit extending along a longitudinal axis; a distal end portion including: a second conduit extending along a direction intersecting the longitudinal axis, the second conduit communicating with the first conduit; an opening in communication with a distal end of the second conduit; wherein the distal end portion includes: a first surface configured to supply energy; a second surface configured to supply the energy, the second surface provided distally relative to the first surface, the second surface including a distal edge having an arc shape and a planar surface extending towards the longitudinal axis; and a proximal end of a proximal side of the first surface along the longitudinal axis has a larger inner diameter than an inner diameter at a distal portion the tubular portion.
2. 2 . The electrode according to claim 1 , wherein the second surface faces a direction different from a direction of the first surface faces, the second surface extending obliquely relative to the first surface.
3. 3 . The electrode according to claim 1 , wherein the second surface has an arc shape.
4. 4 . The electrode according to claim 1 , wherein an outer surface of the electrode with the conduit, excluding the first surface and the second surface, is provided with a first coating layer having electrical insulation property.
5. 5 . The electrode according to claim 1 , wherein at least a part of an inner surface of the electrode with the conduit, is provided with a second coating layer having electrical insulation property.
6. 6 . The electrode according to claim 1 , wherein the tubular portion is provided with a through hole configured to penetrate through the tubular portion and prevent biological tissue from being adhered to the tubular portion.
7. 7 . The electrode according to claim 6 , wherein the through hole is provided at a proximal side of the first surface along the longitudinal axis.
8. 8 . The electrode according to claim 7 , wherein the proximal end is located proximally relative to the through hole.
9. 9 . The electrode according to claim 1 , wherein a diameter of the opening is larger than a diameter of a cross-section of the first conduit.
10. 10 . A treatment tool comprising: a tubular sheath; and an electrode according to claim 1 , the electrode being provided at a distal end of the sheath.
11. 11 . The electrode according to claim 1 , wherein the opening is provided at a distal end of the second conduit.
12. 12 . The electrode according to claim 1 , wherein a part of the first surface protrudes toward a distal end side from the opening.
13. 13 . The electrode according to claim 1 , wherein the second surface includes a curved surface that contacts a rounded ridge portion.
14. 14 . The electrode according to claim 1 , wherein: a surface of the opening extends in a direction that intersects with a direction of the first surface, and the first surface intersects with an opening plane of the opening.
15. 15 . The electrode according to claim 1 , wherein an end portion of the second surface forms one side of the opening.
16. 16 . The electrode according to claim 1 , wherein the opening is configured to open in a direction intersecting the longitudinal axis, the first surface is a flat surface, and the second surface is provided at distal-most end of the first surface.
17. 17 . The electrode according to claim 1 , wherein the second surface extends continuously from the first surface in the longitudinal axis.
18. 18 . The electrode according to claim 1 , wherein the first surface has a curved distal edge portion and a curved proximal edge portion.
19. 19 . The electrode according to claim 18 , further comprising a first insulating surface on an outer surface of the tubular portion such that form the curved proximal edge portion, excluding the first surface and the second surface, wherein the first insulating surface has electrical insulation property.
20. 20 . The electrode according to claim 19 , further comprising a second insulating surface on at least a part of an inner surface of the first and the second conduit wherein the second insulating surface has electrical insulation property.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of PCT international application Ser. No. PCT/JP2020/035324 filed on Sep. 17, 2020 which designates the United States, incorporated herein by reference, and which claims the benefit of priority from U.S. Patent Applications No. 62/905,711, filed on Sep. 25, 2019, incorporated herein by reference. BACKGROUND 1. Technical Field The present disclosure relates to an electrode with a conduit and a treatment tool. 2. Related Art In the related art, a treatment tool has been introduced, which has a suction function of sucking up body fluid or the like, and a hemostatic function of causing a high-frequency current to flow through a hemostasis target site in a biological tissue in order to stop bleeding (see, for example, JP 2020-5875 A). A treatment tool (surgical suction tube having a coagulation function) described in JP 2020-5875 A includes a tube member having a hollow hole and an electrode that causes a high-frequency current to flow to a hemostasis target site. The electrode has a bottomed cylindrical shape, and is attached to an end portion of the tubular member in a posture of closing the end portion. In addition, a side surface of the electrode is provided with an opening communicating the inside of the electrode (inside of the tubular member) and the outside of the electrode, which is designed to suction body fluid or the like. SUMMARY In exemplary embodiments, an electrode with a conduit includes: a tubular portion internally provided with a first conduit extending along a longitudinal axis connecting a distal end and a proximal end of the tubular portion; a distal end portion provided at the distal end of the tubular portion; a second conduit that is provided inside the distal end portion and that extends in a direction intersecting the longitudinal axis, the second conduit being configured to communicate with the first conduit; an opening configured to open in a direction intersecting the longitudinal axis and communicate with the first conduit and the second conduit; a first hemostatic surface that constitutes a part of an outer surface of the distal end portion, has a flat surface extending from the distal end of the tubular portion in an extending direction of the second conduit, and serves as an electrode configured to cause a high-frequency current to flow through a biological tissue; and a second hemostatic surface that is connected to a distal end side of the first hemostatic surface and is provided at an end portion protruding toward a distal end side from the opening. In exemplary embodiments, a treatment tool includes: a tubular sheath; and an electrode with a conduit, the electrode being provided at a distal end of the sheath. The electrode with the conduit includes: a tubular portion internally provided with a first conduit extending along a longitudinal axis connecting a distal end and a proximal end of the tubular portion, the first conduit being configured to communicate with an inside of the sheath; and a distal end portion provided at the distal end of the tubular portion, and the distal end portion includes: a second conduit that is provided inside the distal end portion and that extends in a direction intersecting the longitudinal axis, the second conduit being configured to communicate with the first conduit; an opening that is provided at a distal end of the second conduit, the opening being configured to allow communication between the second conduit and an outside of the distal end portion and open in a direction intersecting the longitudinal axis; and a first hemostatic surface that constitutes a part of an outer surface of the distal end portion and that serves as an electrode configured to apply high-frequency energy to a biological tissue. The above and other features, advantages and technical and industrial significance of this disclosure will be better understood by reading the following detailed description of presently exemplary embodiments of the disclosure, when considered in connection with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view illustrating a treatment tool according to an exemplary embodiment; FIG. 2 is a view illustrating an electrode with a conduit; FIG. 3 is a view illustrating an electrode with a conduit; FIG. 4 is a view illustrating an electrode with a conduit; FIG. 5 is a view illustrating an electrode with a conduit; FIG. 6 is a view illustrating Modified Example 1 of an exemplary embodiment; FIG. 7 is a view illustrating Modified Example 2 of an exemplary embodiment; FIG. 8 is a view illustrating Modified Example 3 of an exemplary embodiment; FIG. 9 is a view illustrating Modified Example 4 of an exemplary embodiment; FIG. 10 is a view illustrating Modified Example 5 of the embodiment; FIG. 11 is a view illustrating Modified Example 6 of an exemplary embodiment; FIG. 12 is a view illustrating Modified Example 7 of an exemplary embodiment; FIG. 13