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US-12616495-B2 - Treatment tool and method of producing treatment tool

US12616495B2US 12616495 B2US12616495 B2US 12616495B2US-12616495-B2

Abstract

Treatment tool includes a fixed handle, a shaft extending distally from the fixed handle, a treatment portion projecting distally from the shaft and configured to treat biological tissue, a jaw pivotably rotatably with respect to the shaft and, with the treatment portion, configured to grasp the biological tissue therebetween, a movable handle extending proximally from the jaw and causing the jaw to open and close relative to the treatment portion by proximally approaching or separating from the fixed handle, and a first adjusting member provided on the movable handle and having an extension protruding toward the fixed handle and, when the movable handle is brought into close proximity to the fixed handle, abutting the fixed handle. Changing the amount (length) by which the extension of the first adjusting member protrudes from the movable handle, adjusts an amount of the stroke of the movable range of the movable handle.

Inventors

  • Seigo KASE
  • Takashi Nagata
  • Yusuke Inui

Assignees

  • OLYMPUS MEDICAL SYSTEMS CORP.

Dates

Publication Date
20260505
Application Date
20220819

Claims (19)

  1. 1 . A treatment tool, comprising: a fixed handle; a treatment portion; a jaw configured to rotate about a rotation axis relative to the treatment portion; a movable handle configured to operate the jaw; and a first protrusion disposed at the movable handle, wherein the movable handle includes a plurality of recesses, the plurality of recesses is arranged along a longitudinal direction of the movable handle, and each of the plurality of recesses is configured to receive the first protrusion, wherein each recess of the plurality of recesses is separated from an adjacent one of the plurality of recesses by a portion of the movable handle, wherein the first protrusion extends from a surface of the movable handle toward the fixed handle and the first protrusion is configured to contact the fixed handle when the movable handle is moved toward to the fixed handle, and wherein an amount of a stroke of the movable handle is adjustable by at least one of (i) adjusting an amount that the first protrusion extends from the surface of the movable handle and (ii) adjusting a location of the first protrusion on the movable handle in the longitudinal direction of the movable handle.
  2. 2 . The treatment tool according claim 1 , further comprising a second protrusion disposed at the movable handle, wherein the first protrusion extends from the surface of the movable handle toward the fixed handle by the first protruding amount, and wherein the second protrusion extends from the surface of the movable handle toward the fixed handle by a second protruding amount.
  3. 3 . The treatment tool according to claim 1 , wherein adjusting the location of the first protrusion includes changing in which of the plurality of recesses the first protrusion is disposed.
  4. 4 . The treatment tool according claim 1 , further comprising a second protrusion disposed at the movable handle, wherein the first protrusion extends from the surface of the movable handle toward the fixed handle by the first protruding amount, wherein the second protrusion extends from the surface of the movable handle toward the fixed handle by a second protruding amount, wherein the first protruding amount is different from the second protruding amount, and wherein one of the first protrusion and the second protrusion is disposed in one of the plurality of recesses.
  5. 5 . The treatment tool according claim 1 , wherein the first protrusion includes a fitting portion and the first protrusion is provided on one surface of the fitting portion, and wherein the movable handle includes a recess configured to receive the fitting portion of the first protrusion.
  6. 6 . The treatment tool according claim 1 , wherein the treatment portion is configured to treat a living tissue positioned between the jaw and the treatment portion by ultrasonic vibration.
  7. 7 . A manufacturing method of the treatment tool according to claim 1 , comprising: measuring an amount of a gripping force between the treatment portion and the jaw when the fixed handle and the movable handle are gripped; and adjusting the amount of the gripping force to a specific amount by adjusting the amount of the stroke of the movable handle.
  8. 8 . The treatment tool according claim 1 , further comprising: a shaft extended from the fixed handle in the longitudinal direction, wherein the treatment portion projects distally from a distal end of the shaft, the treatment portion is configured to treat a living tissue, wherein the jaw is configured to rotate to hold the living tissue between the jaw and the treatment portion, and wherein the movable handle is extended from the jaw in a proximal direction, the movable handle configured to move relative to the fixed handle between a furthest position and a closest position defining the stroke of the movable handle and so as to move the jaw to open or close against the treatment portion.
  9. 9 . The treatment tool according claim 1 , wherein when the first protrusion contacts the fixed handle and the movable handle receives a gripping force, the movable handle is configured to be deformed by the gripping force.
  10. 10 . A treatment tool, comprising: a fixed handle; a treatment portion; a jaw configured to rotate about a rotation axis relative to the treatment portion; a movable handle configured to operate the jaw; and a second adjusting member disposed inside one or more of the movable handle and the jaw, the second adjusting member configured to adjust a rigidity of the one or more of the movable handle and the jaw, wherein the second adjusting member includes a thread part threadedly connected to the inside of the one or more of the movable handle and the jaw.
  11. 11 . The treatment tool according claim 10 , wherein the second adjusting member is an elongated plate having a length dimension L 0 , wherein the one or more of the movable handle and the jaw inside which the second adjusting member disposed is made of a first material having a first Young's modulus and the second adjusting member is made from a second material having a second Young's modulus, and wherein the second Young's modulus is greater than the first Young's modulus.
  12. 12 . The treatment tool according claim 10 , wherein the second adjusting member is configured to change an attachment position inside the one or more of the movable handle and the jaw in a longitudinal direction of the one or more of the movable handle and the jaw so as to adjust the rigidity of the one or more of the movable handle and the jaw.
  13. 13 . The treatment tool according claim 10 , further comprising a third adjusting member disposed inside the one or more of the movable handle and the jaw, the third adjusting member configured to adjust the rigidity of the one or more of the movable handle and the jaw, wherein the second adjusting member has a different shape from the third adjusting member.
  14. 14 . The treatment tool according claim 10 , further comprising a first protrusion disposed at one of the fixed handle and the movable handle, wherein the first protrusion extends from a surface of the one of the fixed handle and the movable handle toward the other handle and the first protrusion is configured to contact the other handle when the movable handle is moved toward to the fixed handle, and wherein an amount of a stroke of the movable handle is adjustable by at least one of (i) adjusting an amount the first protrusion extends from the surface of the one of the fixed handle and the movable handle and (ii) adjusting a location of the first protrusion on the one of the fixed handle and the movable handle in a longitudinal direction of the one of the fixed handle and the movable handle.
  15. 15 . A manufacturing method of the treatment tool according to claim 10 , comprising: measuring an amount of a gripping force between the treatment portion and the jaw when the fixed handle and the movable handle are gripped; and adjusting the amount of the gripping force to a specific amount by adjusting the rigidity of the one or more of the movable handle and the jaw.
  16. 16 . The treatment tool according claim 10 , wherein the one or more of the movable handle and the jaw has an insertion hole, and wherein the second adjusting member is disposed into the insertion hole.
  17. 17 . The treatment tool according claim 10 , further comprising: a shaft extended from the fixed handle in a longitudinal direction, wherein the treatment portion projects distally from a distal end of the shaft, the treatment portion is configured to treat a living tissue between the jaw and the treatment portion by ultrasonic vibration, wherein the jaw is configured to rotate to hold the living tissue between the jaw and the treatment portion, and wherein the movable handle is extended from the jaw in a proximal direction, the movable handle configured to move relative to the fixed handle between a furthest position and a closest position defining a stroke of the movable handle and so as to move the jaw to open or close against the treatment portion.
  18. 18 . The treatment tool according claim 10 , wherein the second adjusting member is configured to: change a threaded state against the one or more of the movable handle and the jaw, and advance and retract against the one or more of the movable handle and the jaw along a longitudinal direction of the one or more of the movable handle and the jaw to adjust the rigidity of the one or more of the movable handle and the jaw.
  19. 19 . The treatment tool according claim 10 , wherein the second adjusting member is disposed inside the jaw.

Description

RELATED APPLICATION DATA This application is based on and claims priority under 35 U.S.C. § 119 to U.S. Provisional Application No. 63/241,150 filed on Sep. 7, 2021, the entire contents of which are incorporated herein by reference. FIELD OF THE INVENTION The present invention relates to a treatment tool and a method of manufacturing a treatment tool. DESCRIPTION OF THE RELATED ART Conventionally, a treatment tool for treating a biological tissue by imparting treatment energy to a biological tissue is known (see, for example, Patent Document 1). In the treatment tool described in Patent Document 1, by gripping the grip portion and the arm body, the biological tissue is grasped between the clamp body and the probe portion. Prior art documents—Patent Document 1: JP 2000-000249. SUMMARY OF THE INVENTION Problem to be Solved by the Invention In the treatment tool, the amount of gripping force for grasping the biological tissue is such that a variation occurs due to the differences between each individual treatment tool. Therefore, there has been a demand for a technique capable of adjusting the amount of grasping force and stably grasping a biological tissue. In view of the above, it is an object of the present invention to provide a treatment tool capable of stably grasping a biological tissue, and a method of manufacturing a treatment tool. Means for Solving the Problem In order to solve the above problems and to achieve the purpose, a treatment tool according to the present invention includes a fixed handle, a shaft extending distally from the fixed handle, a treatment portion projecting distally from the shaft and configured for treating a biological tissue, a jaw rotatably provided with respect to the shaft and configured for grasping the biological tissue, a movable handle extending proximally from the jaw and causing the jaw to open or close, and a first adjusting member including a protrusion, the first adjusting member extending from one of the fixed handle and the movable handle toward the other handle and the first adjusting member abutting against the other handle when the movable handle is brought into proximity with respect to the fixing handle. By changing a length of the protrusion or a position of the protrusion, it is possible to adjust the movable range of the movable handle, i.e., the stroke of the movable handle. A treatment tool according to the present invention comprises a fixed handle, a shaft extending distally from the fixed handle, a treatment portion projecting distally from the shaft and configured for treating biological tissue, a jaw rotatably provided with respect to the shaft and configured for grasping the biological tissue between the treatment portion, a movable handle extending proximally from the jaw and causing the jaw to open and close, and a second adjusting member provided inside at least one of the jaw and the movable handle to adjust a rigidity thereof. A method of manufacturing a treatment tool according to the present invention includes a step of measuring an initial amount of a gripping force between a treatment portion and a jaw when a fixed handle and a movable handle are gripped, and a step of adjusting the initial amount of the gripping force to a second gripping force amount by one of both of the first adjusting member and the second adjusting member. Effect of the Invention According to the treatment tool and the method of manufacturing the treatment tool according to the present invention, it is possible to stably grasp the biological tissue. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a treatment instrument according to the first embodiment. FIG. 2 is a diagram illustrating a configuration of the first adjusting member. FIG. 3A is a diagram illustrating the function of the first adjusting member. FIG. 3B is a diagram illustrating the function of the first adjusting member. FIG. 3C is a diagram illustrating the function of the first adjusting member. FIG. 4A is a diagram showing a configuration of a first adjusting member according to the second embodiment. FIG. 4B is a diagram showing a configuration of a first adjusting member according to the second embodiment. FIG. 4C is a diagram showing a configuration of a first adjusting member according to the second embodiment. FIG. 5 is a diagram illustrating a configuration of a first adjusting member according to the third embodiment. FIG. 6 is a diagram illustrating a configuration of a first adjusting member according to the fourth embodiment. FIG. 7A is a diagram illustrating a configuration of a first adjusting member according to the fourth embodiment. FIG. 7B is a diagram illustrating a configuration of a first adjusting member according to the fourth embodiment. FIG. 7C is a diagram illustrating a configuration of a first adjusting member according to the fourth embodiment. FIG. 8 is a diagram illustrating a configuration of a second adjusting member according to the fifth embodiment. FIG.