Treatment tool

Abstract

The treatment tool comprises: a sheath; a central shaft member extending in a width direction orthogonal to a longitudinal direction of the sheath; and a pair of forceps having a first forceps piece and a second forceps piece, at least one of the first forceps piece and the second forceps piece being supported so as to be openable and closable about the central shaft member, the length of the first forceps piece in the width direction being equal to or greater than the length of the first forceps piece in the length direction, and the length of the second forceps piece being equal to or greater than the length of the second forceps piece in the length direction. The length of the second forceps piece in the width direction is equal to or greater than the length of the second forceps piece in the length direction.

Description

Technical Field

[0001] The present invention relates to a treatment device. This application claims priority based on U.S. Provisional Application No. 63 / 373192 filed in the United States on August 22, 2022, the contents of which are incorporated herein by reference. Background Art

[0002] Conventionally, hemostatic forceps (treatment instruments) are used in endoscopic treatment to stop bleeding by cauterizing the bleeding treatment object. The hemostatic forceps described in Patent Document 1 and the like hold the treatment object with openable and closable forceps pieces and stop bleeding of the treatment object with forceps pieces through which high-frequency current is passed.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 4668525 Summary of the invention

[0006] Problem that the invention aims to solve

[0007] However, the conventional hemostatic forceps (disposal instruments) described in Patent Document 1 etc. are in the shape of a vertically elongated cup, so there is a situation that the forceps piece pushes the biological tissue toward the distal end and the biological tissue can only be held by the front end of the forceps piece. Therefore, it is possible that the biological tissue cannot be held as intended by the operator.

[0008] In view of the above circumstances, an object of the present invention is to provide a treatment instrument that can easily grasp a living tissue to be treated.

[0009] Solutions for solving problems

[0010] In order to solve the above technical problems, the present invention proposes the following technical solutions.

[0011] The treatment instrument of the first technical solution of the present invention includes: a sheath; a rotating axis component, which extends in a width direction orthogonal to the length direction of the sheath; and a forceps, which has a first forceps piece and a second forceps piece, at least one of the first forceps piece and the second forceps piece is supported to be able to open and close around the rotating axis component, the length of the first forceps piece in the width direction is greater than the length of the first forceps piece in the length direction, and the length of the second forceps piece in the width direction is greater than the length of the second forceps piece in the length direction.

[0012] Effects of the Invention

[0013] According to the treatment instrument of the present invention, it is easy to grasp the living tissue to be treated. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall view of the endoscope treatment system according to the first embodiment.

[0015] Figure 2 It is an overall view showing a treatment instrument of the endoscope treatment system.

[0016] Figure 3 This is a perspective view of the front end portion of the treatment instrument with the forceps in a closed state.

[0017] Figure 4 This is a perspective view of the front end portion of the treatment instrument with the forceps in a closed state.

[0018] Figure 5 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0019] Figure 6 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0020] Figure 7 It is a perspective view of a frame of a support member of the treatment instrument.

[0021] Figure 8 This is a front view of the treatment instrument with the forceps in a closed state.

[0022] Fig. 9 This is a left side view of the treatment instrument with the forceps in a closed state.

[0023] Fig.10 This is a left sectional view of the treatment instrument with the forceps in a closed state.

[0024] Fig.11 This is a top view of the treatment instrument with the forceps in a closed state.

[0025] Fig.12 This is a bottom view of the treatment instrument with the forceps in a closed state.

[0026] Fig.13 This is a right side view of the treatment instrument with the forceps in a closed state.

[0027] Fig.14 This is a right side cross-sectional view of the treatment instrument with the forceps in a closed state.

[0028] Fig.15 This is a front view of the treatment instrument with the forceps in an open state.

[0029] Fig.16 It is a left side view of the treatment instrument with the forceps in an open state.

[0030] Fig.17This is a left sectional view of the treatment instrument with the forceps in an open state.

[0031] Fig.18 This is a top view of the treatment instrument with the forceps in a closed state.

[0032] Fig.19 This is a bottom view of the treatment instrument with the forceps in a closed state.

[0033] Fig. 20 It is a right side view of the treatment instrument with the forceps in an open state.

[0034] Fig.21 This is a right side cross-sectional view of the treatment instrument with the forceps in an open state.

[0035] Fig. 22 It is a rear view of the front end of the treatment instrument.

[0036] Fig.23 This is a perspective view of the treatment instrument according to the second embodiment when the forceps are in a closed state.

[0037] Fig.24 This is a perspective view of the front end portion of the treatment instrument with the forceps in a closed state.

[0038] Fig.25 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0039] Fig.26 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0040] Fig. 27 This is a left side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0041] Fig.28 This is a right side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0042] Fig.29 This is a plan view of the front end portion of the treatment instrument with the forceps in a closed state.

[0043] Fig.30 This is a bottom view of the front end portion of the treatment instrument with the forceps in a closed state.

[0044] Fig.31 This is a front view of the front end portion of the treatment instrument with the forceps in a closed state.

[0045] Fig.32 It is a rear view of the front end of the treatment instrument.

[0046] Fig.33 This is a perspective view of the treatment instrument according to the third embodiment in a closed state.

[0047] Fig.34 This is a perspective view of the front end portion of the treatment instrument with the forceps in a closed state.

[0048] Fig.35 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0049] Fig.36 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0050] Fig.37 This is a left side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0051] Fig.38 This is a right side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0052] Fig.39 This is a plan view of the front end portion of the treatment instrument with the forceps in a closed state.

[0053] Fig.40 This is a bottom view of the front end portion of the treatment instrument with the forceps in a closed state.

[0054] Fig.41 This is a front view of the front end portion of the treatment instrument with the forceps in a closed state.

[0055] Fig.42 It is a rear view of the front end of the treatment instrument.

[0056] Fig.43 It is a perspective view of the distal end portion of the treatment instrument according to the fourth embodiment when it is in a closed state.

[0057] Fig.44 This is a perspective view of the front end portion of the treatment instrument with the forceps in a closed state.

[0058] Fig.45 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0059] Fig.46 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0060] Fig.47 This is a left side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0061] Fig.48 This is a right side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0062] Fig.49 This is a plan view of the front end portion of the treatment instrument with the forceps in a closed state.

[0063] Fig.50 This is a bottom view of the front end portion of the treatment instrument with the forceps in a closed state.

[0064] Fig.51 This is a front view of the front end portion of the treatment instrument with the forceps in a closed state.

[0065] Fig.52 It is a rear view of the front end of the treatment instrument.

[0066] Fig.53 It is a perspective view of the distal end portion of the treatment instrument according to the fifth embodiment when it is in a closed state.

[0067] Fig.54 This is a perspective view of the front end portion of the treatment instrument with the forceps in a closed state.

[0068] Fig.55 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0069] Fig.56 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0070] Fig.57 This is a left side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0071] Fig.58 This is a right side view of the treatment instrument with the forceps in a closed state.

[0072] Fig.59 This is a top view of the treatment instrument with the forceps in a closed state.

[0073] Fig.60 This is a bottom view of the treatment instrument with the forceps in a closed state.

[0074] Fig.61 This is a front view of the treatment instrument with the forceps in a closed state.

[0075] Fig.62 It is a rear view of the front end of the treatment instrument.

[0076] Fig.63 This is a perspective view of the treatment instrument according to the sixth embodiment in a closed state.

[0077] Fig.64 This is a perspective view of the front end portion of the treatment instrument with the forceps in a closed state.

[0078] Fig.65 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0079] Fig.66 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0080] Fig.67 This is a left side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0081] Fig.68 This is a right side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0082] Fig.69 This is a plan view of the front end portion of the treatment instrument with the forceps in a closed state.

[0083] Fig.70 This is a bottom view of the front end portion of the treatment instrument with the forceps in a closed state.

[0084] Fig.71 This is a front view of the front end portion of the treatment instrument with the forceps in a closed state.

[0085] Fig.72 It is a rear view of the front end of the treatment instrument.

[0086] Fig.73 This is a perspective view of the treatment instrument according to the seventh embodiment in a closed state.

[0087] Fig.74 This is a perspective view of the front end portion of the treatment instrument with the forceps in a closed state.

[0088] Fig.75 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0089] Fig.76 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0090] Fig.77 This is a left side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0091] Fig.78 This is a right side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0092] Fig.79 This is a plan view of the front end portion of the treatment instrument with the forceps in a closed state.

[0093] Fig.80 This is a bottom view of the front end portion of the treatment instrument with the forceps in a closed state.

[0094] Fig.81 This is a front view of the front end portion of the treatment instrument with the forceps in a closed state.

[0095] Fig.82 This is a rear view of the front end portion of the treatment instrument with the forceps in a closed state.

[0096] Fig.83 This is a perspective view of the treatment instrument according to the eighth embodiment in a closed state.

[0097] Fig.84 This is a perspective view of the front end portion of the treatment instrument with the forceps in a closed state.

[0098] Fig.85 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0099] Fig.86 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0100] Fig.87 This is a left side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0101] Fig.88 This is a right side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0102] Fig.89 This is a plan view of the front end portion of the treatment instrument with the forceps in a closed state.

[0103] Fig.90 This is a bottom view of the front end portion of the treatment instrument with the forceps in a closed state.

[0104] Fig.91 This is a front view of the front end portion of the treatment instrument with the forceps in a closed state.

[0105] Fig.92 It is a rear view of the front end of the treatment instrument.

[0106] Fig.93 This is a perspective view of a treatment instrument according to a ninth embodiment when forceps are in a closed state.

[0107] Fig.94 This is a perspective view of the front end portion of the treatment instrument with the forceps in a closed state.

[0108] Fig.95 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0109] Fig.96 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0110] Fig.97 This is a left side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0111] Fig.98 This is a right side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0112] Fig.99 This is a plan view of the front end portion of the treatment instrument with the forceps in a closed state.

[0113] Fig.100 This is a bottom view of the front end portion of the treatment instrument with the forceps in a closed state.

[0114] Fig.101 This is a front view of the front end portion of the treatment instrument with the forceps in a closed state.

[0115] Fig.102 It is a rear view of the front end of the treatment instrument.

[0116] Fig.103 This is a perspective view of a treatment instrument according to a tenth embodiment, in which forceps are in a closed state.

[0117] Fig.104 This is a perspective view of the front end portion of the treatment instrument with the forceps in a closed state.

[0118] Fig.105 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0119] Fig.106 This is a perspective view of the front end portion of the treatment instrument with the forceps in an open state.

[0120] Fig.107 This is a left side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0121] Fig.108 This is a right side view of the front end portion of the treatment instrument with the forceps in a closed state.

[0122] Fig.109 This is a plan view of the front end portion of the treatment instrument with the forceps in a closed state.

[0123] Fig.110 This is a bottom view of the front end portion of the treatment instrument with the forceps in a closed state.

[0124] Fig.111 This is a front view of the front end portion of the treatment instrument with the forceps in a closed state.

[0125] Fig.112 It is a rear view of the front end of the treatment instrument.

[0126] Fig.113 This is a diagram showing an example of how the treatment tool is used. DETAILED DESCRIPTION

[0127] (First Embodiment)

[0128] Reference Figures 1 to 22An endoscope treatment system 300 including the endoscope treatment instrument 100 according to the first embodiment of the present invention will be described. Figure 1 It is an overall diagram of the endoscope treatment system 300 .

[0129] [Endoscopic treatment system 300]

[0130] like Figure 1 As shown, the endoscope treatment system 300 includes an endoscope treatment instrument 100 and an endoscope 200. The endoscope treatment instrument 100 is inserted into the endoscope 200 for use.

[0131] [Endoscope 200]

[0132] The endoscope 200 is a well-known flexible endoscope, and includes an insertion portion 210 inserted into the body from the distal end, an operation portion 220 attached to the proximal end of the insertion portion 210 , and a universal cable 230 attached to the operation portion 220 .

[0133] The insertion part 210 is a slender longitudinal member that can be inserted into the lumen. The insertion part 210 has a front end 211, a curved part 214, and a soft part 215. The front end 211, the curved part 214, and the soft part 215 are connected in sequence from the front end side. A channel 216 for inserting the treatment instrument 100 is provided inside the insertion part 210. The front end opening 212 of the channel 216 and the camera part 213 are provided at the front end 211.

[0134] The imaging unit 213 includes an imaging element such as a CCD or a CMOS, and can image a portion to be treated. The bending portion 214 bends in accordance with a user's operation of the operating unit 220. The soft portion 215 is a flexible tubular portion.

[0135] The operation part 220 is connected to the soft part 215. The operation part 220 has a handle 221, an input part 222, and a forceps opening 223. The handle 221 is a member supported by the user. The input part 222 receives an operation input for bending the bending part 214. The forceps opening 223 is a base end opening of the channel 216.

[0136] The universal cable 230 connects the endoscope treatment instrument 100 and external equipment. An imaging cable, an optical fiber cable, or the like that outputs an imaging signal captured by the imaging unit 213 to the outside is inserted into the universal cable 230 .

[0137] [Endoscope treatment instrument 100]

[0138] like Figure 2 As shown, the endoscope treatment instrument 100 (also referred to as the treatment instrument 100) is a hemostatic forceps for cauterizing the affected part to stop bleeding. The treatment instrument 100 includes a sheath 1, an operation wire 2 (see Fig.10), supporting member 3, forceps (forceps component) 5 and operating portion 8. In the following description, in the longitudinal direction A of the treatment instrument 100, the side inserted into the patient's body is referred to as the "front end side (distal end side) A1", and the operating portion 8 side is referred to as the "base end side (proximal end side) A2".

[0139] like Figures 3 to 6 As shown, a support member 3 and forceps 5 are provided at the front end of the treatment instrument 100. The forceps 5 are supported by the support member 3. The forceps 5 are supported by the support member 3 in an openable and closable manner. The support member 3 and the forceps 5 constitute a "treatment section 110" for treating an affected part.

[0140] In the following description, the direction in which the forceps 5 is opened and closed is referred to as the "opening and closing direction B" or the "up-down direction B". In addition, the direction perpendicular to the longitudinal direction A and the opening and closing direction B is referred to as the "width direction C" or the "left-right direction C". In addition, the plane parallel to the longitudinal direction A and the width direction C is referred to as the "horizontal plane HP". The plane parallel to the longitudinal direction A and the opening and closing direction B is referred to as the "vertical plane VP".

[0141] [Sheath 1]

[0142] The sheath 1 has flexibility, such as Figure 2 As shown in FIG. 1 , the sheath 1 is a longitudinal member extending from the front end 1a to the base end 1b. The sheath 1 has an outer diameter that allows it to be inserted into the channel 216 of the endoscope 200. Figure 1 As shown, when the sheath 1 is inserted into the passage 216, the front end 1a of the sheath 1 can protrude from and retract into the front end opening 212 of the passage 216. The sheath 1 may also have insulating properties.

[0143] [Operation line 2]

[0144] The operation wire 2 is a metal wire that penetrates the inner space 1s of the sheath 1 (see Fig.10 ). The front end of the operation wire 2 is connected to the link mechanism 37 of the support member 3, and the base end of the operation wire 2 is connected to the operation part 8. In addition, the link mechanism 37 is not limited to Fig.10 The structure shown.

[0145] [Supporting member 3]

[0146] like Figure 2 As shown, the support member 3 is mounted on the front end 1a of the sheath 1 to support the forceps 5. Figures 3 to 6 As shown, the support member 3 includes a frame 31, a pin (rotation axis, rotation axis member) 36, a link mechanism 37, and a connection portion 39. The first forceps piece 6 and the second forceps piece 7 of the forceps 5 are supported by the support member 3 by the pin 36 attached to the frame 31 so as to be openable and closable.

[0147] Figure 7It is a perspective view of the frame 31 of the support member 3 .

[0148] The frame 31 is formed of metal such as stainless steel in a substantially U-shaped shape. The frame 31 includes a support body 32 formed in a cylindrical shape and a pair of frame pieces 33 (a first frame piece 34 and a second frame piece 35).

[0149] like Fig.10 As shown in FIG. 1 , the support body 32 is mounted on the front end 1a of the sheath 1 by utilizing the clearance fit of the joint 41 mounted on the front end 1a of the sheath 1. The support body 32 is supported on the front end 1a in a manner that allows rotation relative to the joint 41, that is, the front end 1a of the sheath 1. The central axis O3 of the support member 3 in the longitudinal direction A is substantially consistent with the central axis O1 of the sheath 1 in the longitudinal direction A. The internal space 3s of the support body 32 is consistent with the internal space 1s of the sheath 1 ( Fig.10 ) connected.

[0150] like Figure 5 As shown, a pair of frame pieces 33 (a first frame piece 34 and a second frame piece 35) are provided protrudingly from the support portion body 32 toward the front end side A1. The first frame piece 34 and the second frame piece 35 are evenly provided on both sides of the central axis O3 in the width direction C. The first frame piece 34 and the second frame piece 35 are symmetrically shaped with respect to a vertical plane VP passing through the central axis O3.

[0151] The first frame piece 34 is formed in a flat plate shape extending in the longitudinal direction A. The plate thickness direction of the first frame piece 34 is substantially consistent with the width direction C. The base end side A2 of the first frame piece 34 is connected to the support portion body 32. A semicircular first front end portion 34a is formed on the front end side A1 of the first frame piece 34. A first through hole 34h penetrating in the width direction C is formed on the front end side A1 of the first frame piece 34.

[0152] The second frame piece 35 is formed in a flat plate shape extending in the longitudinal direction A. The plate thickness direction of the second frame piece 35 is substantially consistent with the width direction C. The base end side A2 of the second frame piece 35 is connected to the support portion body 32. A semicircular second front end portion 35a is formed on the front end side A1 of the second frame piece 35. A second through hole 35h penetrating in the width direction C is formed on the front end side A1 of the second frame piece 35.

[0153] Figure 3 and Figure 4 The pin (rotating shaft, rotating shaft member) 36 shown is formed of a metal such as stainless steel into a substantially cylindrical shape. Figure 5 As shown, the pin 36 is inserted into the first through hole 34h and the second through hole 35h and engaged with the first through hole 34h and the second through hole 35h, thereby being attached to the frame 31.

[0154] like Figures 3 to 6 As shown, the connecting rod mechanism 37 is Fig.10 and Fig.14 The link mechanism converts the forward and backward movement of the operating wire 2 in the longitudinal direction A into the opening and closing movement of the forceps 5. Fig.10 and Fig.14 As shown in FIG. 1 and FIG. 2 , the link mechanism 37 includes a rod 37 a , a first link 37 b , and a second link 37 c .

[0155] The rod 37a is formed in a cylindrical shape and is inserted into the internal space 3s of the support body 32. The rod 37a can move forward and backward along the longitudinal direction A. The distal end of the operation wire 2 is attached to the proximal end side A2 of the rod 37a.

[0156] The first link 37b is a plate-shaped member connecting the rod 37a and the first forceps piece 6 of the forceps 5. The first link 37b is connected to the rod 37a in a manner that can rotate along the vertical plane VP relative to the rod 37a. In addition, the first link 37b is connected to the first forceps piece 6 in a manner that can rotate along the vertical plane VP relative to the first forceps piece 6.

[0157] The second connecting rod 37c is a plate-shaped member connecting the rod 37a and the second forceps piece 7 of the forceps 5. The second connecting rod 37c is connected to the rod 37a in a manner that can rotate along the vertical plane VP relative to the rod 37a. In addition, the second connecting rod 37c is connected to the second forceps piece 7 in a manner that can rotate along the vertical plane VP relative to the second forceps piece 7.

[0158] In addition, the operation wire 2 may be directly connected to the proximal end side of the connection portion 39 or may be connected via a connection tool (not shown).

[0159] [Pliers (pliers parts) 5]

[0160] The forceps (forceps member) 5 are components for grasping biological tissue. Figure 3 and Figure 4 As shown, the forceps 5 is supported by the support member 3 so as to be openable and closable toward the distal end side A1. The forceps 5 is formed of a metal material such as stainless steel, and includes a first forceps piece 6 and a second forceps piece 7.

[0161] The first forceps piece 6 is rotatably supported by a pin 36 extending in a width direction perpendicular to the longitudinal direction of the sheath 1 about the central axis R of the pin 36. The first forceps piece 6 is operated by a first link 37b connected to the base end side A2 of the first forceps piece 6.

[0162] The second forceps piece 7 is supported by the pin 36 so as to be rotatable about the central axis R of the pin 36. The second forceps piece 7 is operated by a second link 37c connected to the base end side A2 of the second forceps piece 7.

[0163] The first forceps piece 6 and the second forceps piece 7 are arranged symmetrically with respect to the central axis O5 in the longitudinal direction A of the forceps 5 (see Figure 8 and Fig. 9 ). The central axis O5 of the forceps 5 in the length direction A is substantially consistent with the central axis O1 of the sheath 1 in the length direction A.

[0164] Alternatively, one of the first forceps piece 6 and the second forceps piece 7 may be fixed to the support member 3, and only the other may be rotatably supported by the support member 3. Furthermore, the forceps 5 may be directly operated by an operating wire instead of the link mechanism 37.

[0165] In the following description, the direction in which the first forceps piece 6 opens is referred to as the “lower side B1” in the opening and closing direction B, and the direction in which the second forceps piece 7 opens is referred to as the “upper side B2” in the opening and closing direction B. In addition, the right direction when viewing the base end side A2 from the front end side A1 is referred to as the “right side C1” in the width direction C, and the left direction is referred to as the “left side C2” in the width direction C.

[0166] [First pliers piece 6]

[0167] like Figure 4 , Fig. 9 and Fig.10 As shown, the first forceps piece 6 includes a first plate 63 and a first gripping portion 61 provided on the front end side A1.

[0168] The lower side B1 of the first gripping portion 61 is formed into a semi-ellipsoidal shape (see Figure 8 ), and having a first gripping surface 64 on its upper side B2 for gripping living tissue.

[0169] The first plate 63 is provided on the base end side A2 of the first gripping portion 61. Fig.10 The first plate 63 is formed into a substantially plate shape. The plate thickness direction of the first plate 63 is substantially consistent with the width direction C. Fig.11 and Fig.12 As shown, the first plate 63 is arranged adjacent to the second plate 73 of the second forceps piece 7 , and the second plate 73 is arranged on the right side C1 of the first plate 63 .

[0170] like Figure 4 , Fig. 9 and Fig.10 As shown, the first plate 63 is supported by the pin 36 so as to be rotatable about the central axis R of the pin 36. In addition, the base end of the first plate 63 is rotatably connected to the front end of the first link 37b.

[0171] [Second forceps piece 7]

[0172] like Figure 5 , Fig.13 and Fig.14 As shown, the second forceps piece 7 includes a second plate 73 and a second gripping portion 71 provided on the front end side A1.

[0173] The upper side B2 of the second gripping portion 71 is formed into a semi-ellipsoidal shape (see Figure 8 ), and has a second gripping surface 74 on its lower side B1 for gripping living tissue.

[0174] The second plate 73 is provided on the base end side A2 of the second holding portion 71. Fig.16 The second plate 73 is formed into a substantially plate shape. The plate thickness direction of the second plate 73 is substantially consistent with the width direction C. Fig.13 and Fig.14 As shown, the second plate 73 is arranged adjacent to the first plate 63 of the first forceps piece 6 , and the first plate 63 is arranged on the left side C2 of the second plate 73 .

[0175] like Fig.14 As shown, the second plate 73 is supported by the pin 36 so as to be rotatable about the central axis R of the pin 36. In addition, the base end of the second plate 73 is rotatably connected to the front end of the second link 37c.

[0176] [First Gripping Surface 64 and Second Gripping Surface 74]

[0177] like Fig. 9 and Fig.10 As shown, the first holding surface 64 and the second holding surface 74 are surfaces facing each other when the forceps 5 is in the closed state, and at least a portion of them are in contact with each other in a horizontal plane HP (hereinafter also referred to as "holding surface GP") passing through the central axis O5 of the forceps 5. The first holding surface 64 and the second holding surface 74 are formed in a symmetrical shape with respect to the holding surface GP.

[0178] The first holding surface 64 is a surface with concave and convex parts, such as Fig. 9 As shown, it has a first contact convex portion 65 that contacts the second gripping surface 74 of the second forceps piece 7 when the forceps 5 are in the closed state, and a first housing concave portion 66 that does not contact the second gripping surface 74 when the forceps 5 are in the closed state.

[0179] like Fig. 9 As shown, the first contact protrusion 65 is provided at the front end of the first gripping surface 64. The first contact protrusion 65 is formed into a substantially flat surface extending along the gripping surface GP in the width direction C. When the forceps 5 are in the closed state, the first contact protrusion 65 contacts the second contact protrusion 75 of the second gripping surface 74 opposite in the opening and closing direction B.

[0180] like Fig. 9As shown, the first storage recess 66 is a recessed portion that is recessed from the gripping surface GP to the lower side B1 in the forceps 5 in the closed state, and is provided on the base end side of the first contact protrusion 65. The first storage recess 66 is formed in a substantially flat shape at a position closer to the lower side B1 than the gripping surface GP. The first storage recess 66 is bent toward the upper side B2 at its front end side, and is smoothly connected to the base end side of the first contact protrusion 65.

[0181] The second holding surface 74 is a surface with concave and convex parts, such as Fig. 9 As shown, it has a second contact convex portion 75 that contacts the first gripping surface 64 of the first forceps piece 6 when the forceps 5 are in the closed state, and a second housing concave portion 76 that does not contact the first gripping surface 64 when the forceps 5 are in the closed state.

[0182] like Fig. 9 As shown, the second contact protrusion 75 is provided at the front end of the second gripping surface 74. The second contact protrusion 75 is formed into a substantially flat surface extending along the gripping surface GP in the width direction C. When the forceps 5 is in the closed state, the second contact protrusion 75 contacts the first contact protrusion 65 of the first gripping surface 64 opposite in the opening and closing direction B.

[0183] like Fig. 9 As shown, the second housing recess 76 is a recessed portion that is recessed from the gripping surface GP toward the upper side B2 in the forceps 5 in the closed state, and is provided on the base end side of the second contact protrusion 75. The second housing recess 76 is formed in a substantially flat shape.

[0184] like Fig. 9 As shown, when the forceps 5 are in the closed state, only the first contact protrusion 65 and the second contact protrusion 75 are in contact. Therefore, the distance between the first gripping surface 64 of the first forceps piece 6 and the second gripping surface 74 of the second forceps piece 7 is longer on the base end side in the longitudinal direction A than on the front end side in the longitudinal direction A.

[0185] The maximum length L1 ( L1 ) of the forceps 5 (the first forceps piece 6 and the second forceps piece 7 ) in the width direction C of the present embodiment is Figure 8 ) The length L2 of the forceps 5 in the longitudinal direction A ( Fig. 9 ) is within a range of 1.0 times or more and 1.6 times or less, and is particularly preferably 1.1 times. In addition, the maximum length L1 of the forceps 5 (the first forceps piece 6 and the second forceps piece 7) in the width direction C is less than or equal to the maximum outer diameter of the sheath 1.

[0186] The opening width W ( Fig.16 ) The length L2 of the forceps 5 in the longitudinal direction A ( Fig. 9 ) is within the range of 1.7 times or more and 2.8 times or less, and is particularly preferably 2.0 times.

[0187] The length T in the thickness direction B orthogonal to the longitudinal direction A when the forceps 5 of the present embodiment is closed is within a range of 0.2 times or more and 0.6 times or less of the length L2 in the longitudinal direction A of the forceps 5 , and is particularly preferably 0.3 times.

[0188] In addition, the length L1 ( Figure 8 ) is smaller than the outer diameter of sheath 1.

[0189] [Operation unit 8]

[0190] like Figure 2 As shown, the operation portion 8 is provided on the proximal end side A2 of the sheath 1. The operation portion 8 includes an operation portion main body 81, a slider 82, and a power supply connector 83.

[0191] The front end of the operation part body 81 is connected to the base end 1b of the sheath 1. The operation part body 81 has an internal space through which the operation wire 2 can pass. The operation wire 2 extends to the slider 82 through the internal space of the sheath 1 and the internal space of the operation part body 81.

[0192] The slider 82 is mounted to be movable relative to the operation portion body 81 in the longitudinal direction A. The proximal end of the operation wire 2 is connected to the slider 82. The operation wire 2 moves forward and backward when the operator moves the slider 82 forward and backward relative to the operation portion body 81.

[0193] Furthermore, regarding the slider 82 , when the surgeon rotates the operating portion 8 , the operating wire 2 rotates, and accordingly the forceps 5 rotates.

[0194] A power supply connector 83 is fixed to the slider 82 .

[0195] The power supply connector 83 is connectable to a high frequency power supply device (not shown) and is electrically and physically connected to the proximal end of the operation wire 2. The power supply connector 83 can supply high frequency current supplied from the high frequency power supply device to the forceps 5 via the operation wire 2 and the support member 3.

[0196] [How to use the endoscope treatment system 300]

[0197] Next, use Figure 1 The surgical operation (the method of using the endoscope treatment system 300 ) performed by the endoscope treatment system 300 of the present embodiment shown will be described. Specifically, the incision and dissection treatment and hemostasis treatment of the lesion in endoscopic treatment such as ESD (endoscopic submucosal dissection) will be described.

[0198] Incision and peeling treatment is often accompanied by bleeding. In the case of bleeding, the operator performs hemostatic treatment. Hemostatic treatment is a treatment to stop bleeding by cauterizing the ulcer area after peeling off the lesion area or the bleeding area during the incision and peeling treatment.

[0199] The surgeon grasps the living tissue including the bleeding site using the first grasping surface 64 and the second grasping surface 74 of the forceps 5. The front end of the forceps 5 is provided with the first contact convex portion 65 and the second contact convex portion 75 which are in contact with each other when closed. Therefore, when the surgeon closes the forceps 5 and clamps the living tissue using the first grasping surface 64 and the second grasping surface 74, the living tissue is not easily displaced toward the front end side A1 relative to the forceps 5. As a result, the surgeon can grasp the bleeding site well between the first receiving recess 66 and the second receiving recess 76 of the forceps 5.

[0200] The operator applies high-frequency current to the operating wire 2 while clamping the living tissue with the forceps 5. The high-frequency current is applied to the first gripping surface 64 and the second gripping surface 74 in contact with the living tissue, respectively, so that the bleeding site can be cauterized. The operator continues the above-mentioned actions (treatments) as needed, and finally removes the lesion, ending the ESD operation.

[0201] According to the endoscopic treatment instrument 100 of this embodiment, when the biological tissue to be treated is gripped by the first gripping surface 64 and the second gripping surface 74 of the forceps 5, it is difficult to push the biological tissue toward the front end side (distal end side) A1, and the biological tissue to be treated is easily gripped.

[0202] Furthermore, by forming the forceps 5 (the first forceps piece 6 and the second forceps piece 7 ) into a horizontally long cup shape, it is possible to grasp a living tissue in a wider range than before.

[0203] The first embodiment of the present invention is described in detail with reference to the drawings, but the specific structure is not limited to this embodiment, and also includes design changes within the scope of the gist of the present invention. In addition, the components shown in the above-mentioned embodiments and modifications can be appropriately combined and configured.

[0204] Hereinafter, the structure of another embodiment of the treatment portion 110 used for the endoscope treatment instrument 100 of the present invention will be described.

[0205] (Second Embodiment)

[0206] Reference Figures 23 to 32 A treatment section 110B according to a second embodiment of the present invention will be described. In the following description, the same reference numerals are given to the same configurations as those already described, and duplicate descriptions are omitted.

[0207] [Endoscope treatment instrument 100B]

[0208] Figure 1 The endoscope treatment instrument 100B (also simply referred to as the treatment instrument 100B) of the second embodiment shown is used as an endoscope treatment system together with the endoscope 200, similarly to the endoscope treatment instrument 100 of the first embodiment. The treatment instrument 100B includes a sheath 1, an operation wire 2, a support member 3, a forceps 5B, and an operation portion 8, similarly to the above-mentioned embodiment.

[0209] [Treatment unit 110B]

[0210] like Figures 23 to 31 As shown in FIG. 1 , a treatment portion 110B located at the distal end of a treatment instrument 100B according to the second embodiment includes forceps 5B.

[0211] The forceps 5B of this embodiment includes a first forceps piece 6B and a second forceps piece 7B. By closing the forceps 5B, a living tissue can be grasped between a first grasping portion 61B of the first forceps piece 6B and a second grasping portion 71B of the second forceps piece 7B.

[0212] The first gripping portion 61B has a first gripping surface 64B that can be opposite to the second forceps piece 7B. The first gripping surface 64B is a surface having concave and convex shapes in the opening and closing direction B. Fig. 27 As shown, a plurality of recesses 68B and a plurality of teeth (first teeth) 69B are provided at a position closer to the base end than the first contact protrusion 65. The recesses 68B and the teeth 69B are alternately provided in the longitudinal direction A of the first gripping portion 61B.

[0213] The second gripping portion 71B has a second gripping surface 74B that can be opposite to the first forceps piece 6B. The second gripping surface 74B is a surface having concave and convex shapes in the opening and closing direction B. Fig. 27 As shown, a plurality of recesses 78B and a plurality of teeth (second teeth) 79B are provided at a position closer to the base end than the second contact protrusion 75. The recesses 78B and the teeth 79B are alternately provided in the longitudinal direction A of the second gripping portion 71B.

[0214] In the present embodiment, the first gripping portion 61B and the second gripping portion 71B are symmetrically shaped with respect to the central axis O5 of the forceps 5B, and the recessed portions 68B and 78B and the teeth 69B and 79B are of the same shape.

[0215] The recesses 68B and 78B are groove-shaped and extend over the entire width direction C of each forceps piece 6B and 7B, and are opened on the outer peripheral surface of the first forceps piece 6B and the outer peripheral surface of the second forceps piece 7B (side surfaces on both sides). The shape of the recesses 68B and 78B observed from the width direction C of the forceps 5B is semicircular, but the shape of the recesses 68B and 78B is not limited to this.

[0216] The tooth portions 69B and 79B are convex in shape and extend over the entire range of the width direction C of each gripping portion 61B and 71B. Both side surfaces of the tooth portions 69B and 79B in the width direction C are inclined inwardly toward the tooth tip region in the opening and closing direction B. The top end surfaces of each tooth of the plurality of tooth portions 69B and the plurality of tooth portions 79B are in a planar shape parallel to the central axis O5 when the forceps 5B is in the closed state. When the forceps 5B is in the closed state, the distance from the top end surfaces of each tooth of the plurality of tooth portions 69B and the plurality of tooth portions 79B to the central axis O5 is equal at any position in the length direction A.

[0217] The positions of the recessed portions 68B and the recessed portions 78B in the longitudinal direction A of the forceps 5B are consistent with each other. The positions of the teeth 69B and the teeth 79B in the longitudinal direction A of the forceps 5B are also consistent with each other. Therefore, when the forceps 5 are in a closed state, the recessed portions 68 of the first gripping portion 61B and the recessed portions 78 of the second gripping portion 71B are opposite to each other in the opening and closing direction B, and the teeth 69B of the first gripping portion 61B and the teeth 79B of the second gripping portion 71B are opposite to each other in the opening and closing direction B.

[0218] When the forceps 5B is in a closed state, the contact surface of the first contact protrusion 65 and the contact surface of the second contact protrusion 75 are consistent with the central axis O5 of the forceps 5B. On the other hand, the teeth 69B of the first gripping portion 61B and the teeth 79B of the second gripping portion 71B do not contact each other when the forceps 5B is fully closed, and a small gap is generated between them. That is, compared with the gripping surface GP where the first gripping surface 64B and the second gripping surface 74B are in contact, the teeth 69B and 79B are located at a position separated from the central axis O5 in the longitudinal direction A of the forceps 5B (the first forceps piece 6B and the second forceps piece 7B) in the upward and downward direction B. The above gap is smaller than the gap formed between the recessed portion 68B and the recessed portion 78B.

[0219] According to the forceps 5B of this embodiment, when the living tissue to be treated is gripped using the first gripping surface 64B and the second gripping surface 74B of the forceps 5B, the protrusions and recesses formed by the recesses 68B, 78B and the teeth 69B, 79B make it more difficult to push the living tissue toward the front end side (distal side) A1, and it is easier to stably grip the living tissue to be treated.

[0220] (Third Embodiment)

[0221] Reference Figures 33 to 42 A treatment section 110C according to a third embodiment of the present invention will be described. In the following description, the same components as those already described are denoted by the same reference numerals, and duplicate descriptions are omitted.

[0222] [Endoscope treatment instrument 100C]

[0223] Figure 1 The endoscope treatment instrument 100C (also simply referred to as the treatment instrument 100C) of the third embodiment shown is used as an endoscope treatment system together with the endoscope 200, similarly to the endoscope treatment instrument 100 of the first embodiment. The treatment instrument 100C includes a sheath 1, an operation wire 2, a support member 3, forceps 5C, and an operation portion 8.

[0224] [Processing unit 110C]

[0225] A treatment portion 110C located at the distal end of a treatment instrument 100C according to the third embodiment includes forceps 5C.

[0226] The forceps 5C of this embodiment includes a first forceps piece 6C and a second forceps piece 7C. By closing the forceps 5C, the living tissue can be grasped between the first grasping portion 61C of the first forceps piece 6C and the second grasping portion 71C of the second forceps piece 7C.

[0227] The first gripping portion 61C has a first gripping surface 64C that can be opposite to the second forceps piece 7C. The first gripping surface 64C is a surface having concave and convex shapes in the opening and closing direction B, and has a plurality of concave portions 68C and a plurality of teeth 69C (first teeth) at a position closer to the base end than the first contact convex portion 65 that contacts the second gripping surface 74C. The concave portions 68C and the teeth 69C are alternately arranged in the longitudinal direction A of the first gripping portion 61C.

[0228] The second gripping portion 71C has a second gripping surface 74C that can be opposite to the first forceps piece 6C. The second gripping surface 74C is a surface having concave and convex surfaces in the opening and closing direction B, and has a plurality of concave portions 78C and a plurality of teeth (second teeth) 79C at a position closer to the base end side than the second contact convex portion 75. The concave portions 78C and the teeth 79C are alternately arranged in the longitudinal direction A of the second gripping portion 71C.

[0229] The recessed parts 68C and 78C of this embodiment are in a trapezoidal shape extending toward the central axis O5 when viewed from the side in the width direction C. The height positions of the bottom surfaces of the plurality of recessed parts 68C arranged in the length direction A are the same as each other, and the distances from the central axis O5 are equal to each other. Similarly, the height positions of the bottom surfaces of the plurality of recessed parts 78C arranged in the length direction A are the same as each other, and the distances from the central axis O5 are equal to each other. In addition, each bottom surface of the plurality of recessed parts 68C and 78C is parallel to the central axis O5.

[0230] The tooth portions 69C and 79C of the present embodiment are in a trapezoidal shape extending in a direction away from the central axis O5 when viewed from the side in the width direction C. The height positions of the top end surfaces of the teeth of the plurality of tooth portions 69C and 79C arranged in the length direction A are different from each other. That is, the closer the tooth portion 69C and 79C is to the base end side, the lower the height of the top end surface of the tooth is, and the farther it is from the central axis O5.

[0231] The first gripping portion 61C and the second gripping portion 71C of the present embodiment are symmetrical with respect to the central axis O5 of the forceps 5C. However, the height of the tooth tip surfaces of the plurality of teeth 69C (teeth 79C) arranged in the longitudinal direction A decreases toward the base end.

[0232] Specifically, the closer the tooth portion 69C (tooth portion 79C) is to the base end side, the farther the tooth tip surface is from the central axis O5 of the forceps 5C when the forceps 5C is in the closed state. That is, the longest distance between the tooth portion 69C of the first forceps piece 6C and the tooth portion 79C of the second forceps piece 7C that are opposite to each other when the forceps 5C is in the closed state is the distance between the teeth portions 69C and 79C that are located closest to the base end side, and the closer the tooth portion 69C and 79C are to the base end side, the longer the distance between the teeth portions 69C and 79C is.

[0233] like Fig.37 As shown, the imaginary line K3 connecting the midpoints of the top end surfaces of the teeth of the plurality of teeth 69C arranged in the longitudinal direction A is inclined at a predetermined angle relative to the central axis O5, and is a straight line where the base end side of the forceps 5C is lower than the front end side (farther from the central axis O5). Similarly, the imaginary line (not shown) connecting the midpoints of the top end surfaces of the teeth of the plurality of teeth 79C arranged in the longitudinal direction A is also inclined at the same angle as the above-mentioned imaginary line K3 relative to the central axis O5.

[0234] Furthermore, the width of the tooth tip surface in the longitudinal direction A of the tooth portions 69C and 79C located closest to the base end is larger than that of the other tooth portions 69C and 79C.

[0235] According to the forceps 5C of this embodiment, when the forceps 5C are set to a closed state, the gap between the teeth 69C and 79C becomes wider toward the base end side, so compared with the second embodiment, the space for the target tissue to enter the rear end side (proximal side) of the forceps 5C becomes larger, and the target tissue can be grasped without escaping.

[0236] (Fourth Embodiment)

[0237] Reference Figures 43 to 52 A treatment section 110D according to a fourth embodiment of the present invention will be described. In the following description, the same components as those already described are denoted by the same reference numerals, and duplicate descriptions are omitted.

[0238] [Endoscope treatment instrument 100D]

[0239] Figure 1 The endoscope treatment instrument 100D (also simply referred to as the treatment instrument 100D) of the fourth embodiment shown is used as an endoscope treatment system together with the endoscope 200, similarly to the endoscope treatment instrument 100 of the first embodiment. The treatment instrument 100D includes a sheath 1, an operation wire 2, a support member 3, a forceps 5D, and an operation portion 8.

[0240] [Treatment unit 110D]

[0241] A treatment portion 110D located at the distal end of a treatment instrument 100D according to the fourth embodiment includes forceps 5D.

[0242] The forceps 5D of this embodiment includes a first forceps piece 6D and a second forceps piece 7D. By closing the forceps 5D, the living tissue can be grasped between the first grasping portion 61D of the first forceps piece 6D and the second grasping portion 71D of the second forceps piece 7D.

[0243] The first gripping portion 61D has a first gripping surface 64D that can be opposite to the second forceps piece 7D. The first gripping surface 64D is a surface having concave and convex portions in the opening and closing direction, and has a plurality of concave portions 68D and a plurality of teeth (first teeth) 69D at a position closer to the base end side than the first contact convex portion 65 that contacts the second gripping surface 74D. The concave portions 68D and the teeth 69D are alternately arranged in the length direction A of the first gripping portion 61D.

[0244] The second gripping portion 71C has a second gripping surface 74D that can be opposite to the first forceps piece 6D. The second gripping surface 74D is a surface having concave and convex portions in the opening and closing direction, and has a plurality of concave portions 78D and a plurality of teeth (second teeth) 79D at a position closer to the base end side than the second contact convex portion 75. The concave portions 78D and the teeth 79D are alternately arranged in the longitudinal direction A of the second gripping portion 71D.

[0245] In this embodiment, in the closed state, the plurality of teeth 69D of the first gripping portion 61D and the plurality of teeth 79D of the second gripping portion 71D do not contact each other but form a gap therebetween. The gaps between the teeth 69D and the teeth 79D facing each other in the closed state are all equal regardless of the position in the longitudinal direction A. That is, the distances from the top end surfaces of the plurality of teeth 69D and the plurality of teeth 79D to the central axis O5 are equal to each other, and the top end surfaces of the teeth are parallel to the central axis O5.

[0246] On the other hand, the bottom surface of the recessed portion 68D, 78D becomes lower (moves away from the central axis O5) as it goes toward the base end side. That is, the recessed portion 68D, 78D located closer to the base end has a deeper groove shape, and the recessed portion 68D, 78D closest to the base end is the deepest and is also the farthest from the central axis O5.

[0247] like Fig.47 As shown, an imaginary line R4 connecting the midpoints of the bottom surfaces of the plurality of recesses 68D arranged in the longitudinal direction A is inclined at a predetermined angle relative to the central axis O5, and is a straight line in which the base end side of the forceps 5D is lower than the front end side. Similarly, an imaginary line (not shown) connecting the midpoints of the top end surfaces of the plurality of teeth 79D arranged in the longitudinal direction A is also inclined at the same angle as the imaginary line R4.

[0248] Furthermore, the widths of the tooth tip surfaces in the longitudinal direction A of the plurality of tooth portions 69D and 79D are equal to each other.

[0249] According to the forceps 5D of this embodiment, when the forceps 5D is set to a closed state, the recesses 68D and 78D, which are deeper toward the base end side, are opposite to each other. Therefore, compared with the second embodiment, the space for the target tissue to enter the rear end side (proximal side) of the forceps 5D becomes larger, and the target tissue can be grasped without escaping.

[0250] (Fifth Embodiment)

[0251] Reference Figure 53 to Figure 62 A treatment section 110E according to a fifth embodiment of the present invention will be described. In the following description, the same reference numerals are given to the same configurations as those already described, and duplicate descriptions will be omitted.

[0252] [Endoscope treatment instrument 100E]

[0253] Figure 1 The endoscope treatment instrument 100E (also simply referred to as the treatment instrument 100E) of the fifth embodiment shown is used as an endoscope treatment system together with the endoscope 200, similarly to the endoscope treatment instrument 100 of the first embodiment. The treatment instrument 100E includes a sheath 1, an operation wire 2, a support member 3, forceps 5D, and an operation portion 8.

[0254] [Processing unit 110E]

[0255] A treatment portion 110E located at the distal end of a treatment instrument 100E according to the fifth embodiment includes forceps 5E.

[0256] The forceps 5E of this embodiment includes a first forceps piece 6E and a second forceps piece 7E. By closing the forceps 5E, the living tissue can be grasped between the first grasping portion 61E of the first forceps piece 6E and the second grasping portion 71E of the second forceps piece 7E.

[0257] In this embodiment, when the forceps 5E is in the closed state, all teeth (first teeth) 69E of the first gripping portion 61E and all teeth (second teeth) 79E of the second gripping portion 71E are in contact with each other in the gripping surface GP passing through the central axis O5 of the forceps 5E.

[0258] In this embodiment, the bottom surfaces of the plurality of recesses 68E and 78E provided in the gripping portions 61E and 71E become lower (farther away from the central axis O5) as they go toward the proximal end. That is, the recesses 68E and 78E located closer to the proximal end are deeper, and the recesses 68E and 78E closest to the proximal end are the deepest and the farthest from the central axis O5.

[0259] According to the forceps 5E of this embodiment, when the forceps 5E is set to a closed state, since the recesses 68E and 78E that are deeper toward the base end side are opposite to each other, the space for the target tissue to enter the base end side (proximal side) of the forceps 5E is larger than that of the second embodiment, and the target tissue can be grasped without escaping. In addition, since it is a structure in which all the teeth 69E and 79E are in contact with each other, it is easier to get stuck in the biological tissue and can be reliably grasped.

[0260] (Sixth Embodiment)

[0261] Reference Figures 63 to 72 A treatment section 110F according to a sixth embodiment of the present invention will be described. In the following description, the same components as those already described are denoted by the same reference numerals, and duplicate descriptions are omitted.

[0262] [Endoscope treatment instrument 100F]

[0263] Figure 1 The endoscope treatment instrument 100F (also simply referred to as the treatment instrument 100F) of the sixth embodiment shown is used as an endoscope treatment system together with the endoscope 200, similarly to the endoscope treatment instrument 100 of the first embodiment. The treatment instrument 100F includes a sheath 1, an operation wire 2, a support member 3, a forceps 5F, and an operation portion 8.

[0264] [Treatment unit 110F]

[0265] A treatment portion 110F located at the distal end of a treatment instrument 100F according to the sixth embodiment includes forceps 5F.

[0266] The forceps 5F of this embodiment includes a first forceps piece 6F and a second forceps piece 7F. By closing the forceps 5F, the living tissue can be grasped between the first grasping portion 61F of the first forceps piece 6F and the second grasping portion 71F of the second forceps piece 7F.

[0267] The first gripping surface 64F of the first gripping portion 61F is a surface having projections and depressions in the opening and closing direction B, and has a plurality of recesses 68F and a plurality of teeth (first teeth) 69F at a position closer to the base end than the first contact projection 65 that contacts the second gripping surface 74F. The recesses 68F and the teeth 69F are alternately arranged in the longitudinal direction A of the first gripping portion 61F.

[0268] The second gripping portion 71F has a second gripping surface 74F that can be opposite to the first forceps piece 6F. The second gripping surface 74F is a surface having concave and convex surfaces in the opening and closing direction B, and has a plurality of concave portions 78F and a plurality of teeth (second teeth) 79F at a position closer to the base end side than the second contact convex portion 75. The concave portions 78F and the teeth 79F are alternately arranged in the longitudinal direction A of the second gripping portion 71F.

[0269] In the present embodiment, the height positions of the plurality of teeth 69F and 79F arranged in the longitudinal direction A are different from each other, and the teeth 69F and 79F located closer to the base end have lower heights and are farther from the central axis O5. An imaginary line K6 connecting the midpoints of the tooth top surfaces of the plurality of teeth 69F (79F) arranged in the longitudinal direction A is inclined at a predetermined angle relative to the central axis O5, forming a straight line with the base end side being lower than the tip end side.

[0270] In addition, in the present embodiment, the depths of the plurality of recesses 68F and 78F arranged in the longitudinal direction are also different from each other, and the recesses 68F and 78F located closer to the base end have lower bottom surface heights and are farther from the central axis O5. An imaginary line R6 connecting the midpoints of the bottom surfaces of the plurality of recesses 68F (78F) arranged in the longitudinal direction A is inclined at a predetermined angle relative to the central axis O5, and is set as an inclined surface with the base end side being lower than the front end side.

[0271] like Fig.67As shown, the angle formed by the imaginary line R6 connecting the midpoints of the bottom surfaces of the plurality of recesses 68F arranged in the length direction A and the central axis O5 is smaller than the angle formed by the imaginary line K6 connecting the midpoints of the tooth top surfaces of the plurality of teeth 69F arranged in the length direction A and the central axis O5. That is, the gradient of the bottom surface of the recesses 68F and 78F is smaller than the gradient of the tooth surface of the teeth 69F and 79F. Therefore, the depth of the recesses 68F and 78F becomes shallower as it goes toward the base end side, and the distance between the opposing forceps pieces 6F and 7F becomes larger.

[0272] According to the forceps 5F of this embodiment, when the forceps 5F is set to a closed state, the concave-convex shape decreases toward the base end side, so compared with the second embodiment, the space for the target tissue to enter the base end side (proximal side) of the forceps 5F becomes larger, and the target tissue can be grasped without escaping.

[0273] (Seventh Embodiment)

[0274] Reference Figure 73 to Figure 82 A treatment section 110H according to a seventh embodiment of the present invention will be described. In the following description, the same reference numerals are given to the same configurations as those already described, and duplicate descriptions are omitted.

[0275] [Endoscope treatment instrument 100H]

[0276] Figure 1 The endoscopic treatment instrument 100H (also simply referred to as the treatment instrument 100H) of the seventh embodiment shown is used as an endoscopic treatment system together with an endoscope 200, similarly to the endoscopic treatment instrument 100 of the first embodiment. The treatment instrument 100H includes a sheath 1, an operation wire 2, a support member 3, forceps 5H, and an operation portion 8.

[0277] [Disposal Department 110H]

[0278] A treatment portion 110H located at the distal end of a treatment instrument 100H according to the eighth embodiment includes forceps 5H.

[0279] The forceps 5H of this embodiment includes a first forceps piece 6H and a second forceps piece 7H. By closing the forceps 5H, a living tissue can be grasped between a first grasping portion 61H of the first forceps piece 6H and a second grasping portion 71H of the second forceps piece 7H.

[0280] like Fig.77 and Fig.78As shown, the first gripping portion 61H has a first gripping surface 64H that can be opposite to the second forceps piece 7H. In addition, the second gripping portion 71H has a second gripping surface 74H that can be opposite to the first forceps piece 6H. The first gripping surface 64H and the second gripping surface 74H are surfaces that are opposite to each other when the forceps 5H are in a closed state, and respectively have contact convex portions 65, 75 that contact each other in the gripping surface GP passing through the central axis O5 of the forceps 5H when the forceps 5H are in a closed state, non-contact storage recesses 66H, 76H, and cutout portions 67, 77 provided on the front end sides of the storage recesses 66H, 76H.

[0281] The storage recesses 66H and 76H are recesses that are recessed in a direction away from the center axis O5 in the forceps 5H in the closed state. The depth of the storage recesses 66H and 76H gradually increases as it moves from the base end side of the contact protrusions 65 and 75 to the base end side of the forceps 5H. The storage recesses 66H and 77H have curved surfaces 66h1 and 76h1 located on the respective front end sides (the contact protrusions 65 and 75 sides) and inclined surfaces 66h2 and 76h2 located on the base end sides of the curved surfaces 66h1 and 76h1.

[0282] The curved surfaces 66h1 and 76h1 occupy about one quarter of the length of the storage recesses 66H and 76H in the longitudinal direction A from the distal end side. Since the inclined surfaces 66h2 and 76h2 occupy the remaining three quarters, the central portion of the forceps 5H is formed into a tapered shape that expands toward the proximal end side by the inclined surfaces 66h2 and 76h2.

[0283] Inclined surfaces 66h2 and 76h2 are inclined at a predetermined angle relative to the central axis O5. In the present embodiment, the inclination angle θ6 of the inclined surface 66h2 relative to the central axis O5 and the inclination angle θ7 of the inclined surface 67h2 relative to the central axis O5 are equal to each other, but may be different.

[0284] According to the forceps 5H of this embodiment, as it goes toward the base end side, the groove depth of the storage recesses 66 and 76 becomes larger, and the distance between the relative holding surfaces 64H and 74H becomes larger. Therefore, compared with the first embodiment described above, the space for the target tissue to enter the base end side (proximal side) of the forceps 5H becomes larger. When the forceps 5H is set to a closed state and the contact protrusions 65 and 75 at the front end hold the target tissue between each other, the target tissue is less likely to escape.

[0285] In addition, by slightly entering the cutouts 67 and 77 provided at the front ends of the gripping portions 61H and 71H, a portion of the target tissue gripped by the contact protrusions 65 and 75 enters the target tissue so as to be caught by the gripping portions 61H and 71H, the target tissue can be gripped without being lost.

[0286] (Eighth Embodiment)

[0287] Reference Figures 83 to 92 A treatment section 110I according to an eighth embodiment of the present invention will be described. In the following description, the same reference numerals are given to the same configurations as those already described, and duplicate descriptions will be omitted.

[0288] [Endoscope Treatment Instrument 100I]

[0289] Figure 1 The endoscope treatment instrument 100I (also simply referred to as the treatment instrument 100I) of the eighth embodiment shown is used as an endoscope treatment system together with the endoscope 200, similarly to the endoscope treatment instrument 100 of the first embodiment. The treatment instrument 100I includes a sheath 1, an operation wire 2, a support member 3, forceps 5I, and an operation portion 8.

[0290] [Processing unit 110I]

[0291] A treatment portion 110I located at the distal end of a treatment instrument 100I according to the eighth embodiment includes forceps 5I.

[0292] The forceps 5I of this embodiment includes a first forceps piece 6I and a second forceps piece 7I. By closing the forceps 5I, a living tissue can be grasped between a first grasping portion 61I of the first forceps piece 6I and a second grasping portion 71I of the second forceps piece 7I.

[0293] like Fig.87 and Fig.88 As shown, the first gripping portion 61I has a first gripping surface 64I that can be opposite to the second forceps piece 7I. The second gripping portion 71I has a second gripping surface 74I that can be opposite to the first forceps piece 6I. The first gripping surface 64I and the second gripping surface 74I are surfaces that are opposite to each other when the forceps 5I are in a closed state, and each has a contact convex portion 65, 75 that contacts each other in the gripping surface GP passing through the central axis O5 of the forceps 5I when the forceps 5I are in a closed state, and a non-contact storage concave portion 66I, 76I.

[0294] The storage recessed portion 66I, 76I is a recessed portion that is recessed from the gripping surface GP toward the lower side B1 or the upper side B2 in the forceps 5I in the closed state, and is provided on the base end side of the contact convex portion 65, 75. The groove depth of the storage recessed portion 66I, 76I varies in the longitudinal direction A. In the present embodiment, the groove depth of the storage recessed portion 66I, 76I is deepest at a position closer to the front end than half of the length of the storage recessed portion 66I, 76I in the longitudinal direction A, and becomes shallower toward the rear end side.

[0295] The storage recess 66I has a curved surface 66i1 at the front end and an inclined surface 66i2 at the rear end, which are smoothly connected without a height difference at the boundary. In addition, the storage recess 76I has a curved surface 76i1 at the front end and an inclined surface 76i2 at the rear end, which are smoothly connected without a height difference at the boundary.

[0296] The curved surfaces 66i1 and 76i1 are arcs centered at a point (not shown) located on the sides of the gripping parts 61I and 71I facing each other, and are curved more greatly than in the first embodiment toward the lower side B1 or the upper side B2.

[0297] The inclined surfaces 66i2 and 76i2 are connected to the base end of the curved surfaces 66i1 and 76i1 and are formed into a substantially flat surface at the lower side B1 or the upper side B2 relative to the holding surface GP. The inclined surfaces 66i2 and 76i2 are inclined at a predetermined angle relative to the central axis O5 and become closer to each other toward the base end.

[0298] According to the forceps 5I of this embodiment, since the groove depth of the storage recesses 66I and 76I on the front end (contact convex portions 65 and 75) side is larger than the base end side, when the biological tissue of the target tissue is grasped by the first grasping surface 64I and the second grasping surface 74I of the forceps 5I, the vicinity of the part grasped by the contact convex portions 65 and 75 can be accommodated in the storage recesses 66I and 76I. As a result, it is more difficult to push the biological tissue toward the front end side (distal end side) A1, and it is easier to stably grasp the biological tissue to be treated.

[0299] (Ninth Embodiment)

[0300] Reference Figures 93 to 102 A treatment section 110J according to a ninth embodiment of the present invention will be described. In the following description, the same components as those already described are denoted by the same reference numerals, and duplicate descriptions are omitted.

[0301] [Endoscope treatment instrument 100J]

[0302] Fig.93 The endoscopic treatment instrument 100J (also simply referred to as the treatment instrument 100J) of the ninth embodiment shown is used as an endoscopic treatment system together with an endoscope 200, similarly to the endoscopic treatment instrument 100 of the first embodiment. The treatment instrument 100J includes a sheath 1, an operation wire 2, a support member 3, a forceps 5J, and an operation portion 8.

[0303] [Disposal Unit 110J]

[0304] A treatment portion 110J located at the distal end of a treatment instrument 100J according to the ninth embodiment includes forceps 5J.

[0305] The forceps 5J of this embodiment includes a first forceps piece 6J and a second forceps piece 7J. By closing the forceps 5J, a living tissue can be grasped between a first grasping portion 61J of the first forceps piece 6J and a second grasping portion 71J of the second forceps piece 7J.

[0306] like Fig.97 and Fig.98 As shown, the first gripping portion 61J has a first gripping surface 64J that can be opposite to the second forceps piece 7J. The second gripping portion 71J has a second gripping surface 74J that can be opposite to the first forceps piece 6J. The first gripping surface 64J and the second gripping surface 74J are surfaces that are opposite to each other when the forceps 5J is in a closed state, and each has a contact convex portion 65, 75 that contacts each other in the gripping surface GP passing through the central axis O5 of the forceps 5J when the forceps 5J is in a closed state, and a non-contact storage concave portion 66J, 76J.

[0307] In this embodiment, the area of ​​the gripping surfaces GP facing each other when the forceps 5J is in the closed state is larger than that of the above-mentioned embodiments. Specifically, the contact convex portions 65 and 75 of the forceps 5J of this embodiment have a length in the longitudinal direction A and a depth about twice that of the above-mentioned embodiments. According to this structure, the meshing area of ​​the forceps 5J becomes larger, and the cauterization range can be expanded.

[0308] The storage recess 66J, 76J is a recess that is recessed from the gripping surface GP toward the lower side B1 or the upper side B2 in the closed state of the forceps 5J, and is provided on the base end side of the contact convex portion 65, 75. The groove depth of the storage recess 66J, 76J changes in the length direction A. In the present embodiment, the groove depth of the storage recess 66J, 76J deepens from the base end side of the contact convex portion 65, 75 toward a position about half the length of the storage recess 66J, 76J in the length direction A, and becomes a constant depth in the range from the deepest position to the rear end. That is, the base end side of the storage recess 66J, 76J is formed into a substantially flat shape.

[0309] In addition, cutout surfaces 62 and 72 formed by cutting out from the outer peripheral surface toward the inner side in the width direction are formed on both sides of the first gripping portion 61J and the second gripping portion 71J in the width direction. By providing the cutout surfaces 62 and 72, the corners (vertices) 6j and 7j formed at the boundary between the contact convex portions 65 and 75 and the flat surfaces of the contact convex portions 65 and 75 are located inside the forceps 5J. As a result, when the forceps 5J is opened and closed, the corners 6j and 7j will not get caught on the biological tissue around the target tissue, and the forceps 5J can be opened and closed smoothly.

[0310] (Tenth Embodiment)

[0311] Reference Figure 103 to Figure 113A treatment section 110K according to a tenth embodiment of the present invention will be described. In the following description, the same components as those already described are denoted by the same reference numerals, and duplicate description will be omitted.

[0312] [Endoscope treatment instrument 100K]

[0313] Fig.103 The endoscopic treatment instrument 100K (also simply referred to as the treatment instrument 100K) of the ninth embodiment shown is used as an endoscopic treatment system together with an endoscope 200, similarly to the endoscopic treatment instrument 100 of the first embodiment. The treatment instrument 100K includes a sheath 1, an operation wire 2, a support member 3, a forceps 5K, and an operation unit 8.

[0314] [Disposal Department 110K]

[0315] A treatment portion 110K located at the distal end of a treatment instrument 100K according to the tenth embodiment includes forceps 5K.

[0316] The forceps 5K of this embodiment includes a first forceps piece 6K and a second forceps piece 7K. When the forceps 5K is in a closed state, the living tissue can be grasped between the first grasping portion 61K of the first forceps piece 6K and the second grasping portion 71K of the second forceps piece 7K.

[0317] In this embodiment, if Fig.105 As shown, the front end side A1 of the first forceps piece 6K has a semicircular shape, and the teeth provided on the front end side A1 of the first forceps piece 6K are in an arc shape along the outer shape. In addition, the front end side A1 of the second forceps piece 7K has a semicircular shape, and the teeth provided on the front end side A1 of the second forceps piece 7K are in an arc shape along the outer shape. Therefore, as Fig.113 As shown, when the target tissue is brought close to the side surface of the forceps 5K, the target tissue can be easily grasped by the first forceps piece 6K and the second forceps piece 7K.

[0318] Although preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and addition, omission, substitution, and other changes in structure can be made within the scope not exceeding the gist of the present invention.

[0319] Furthermore, the present invention is not limited by the foregoing description, but only by the appended claims.

[0320] As shown in the front view of each of the above-mentioned embodiments, when the pliers are observed from the front end (A2) side in the length direction A, the dimensions of the contact protrusions 65 and 75 in the width direction C are equal to each other and are both shorter than the maximum width dimension in the width direction C of the pliers.

[0321] Industrial Applicability

[0322] The present invention can be applied to endoscopic treatment instruments such as hemostatic forceps.

[0323] Description of Reference Numerals

[0324] 1. Sheath; 5. 5B, 5C, 5D, 5E, 5F, 5G, 5H, 5I, 5J, 5K, pliers; O5. Center axis; 6. 6B, 6C, 6D, 6E, 6F, 6G, 6H, 6I, 6J, 6K. First pliers piece; 7. 7B, 7C, 7D, 7E, 7F, 7G, 7H, 7I, 7J, 7K. Second pliers piece; 64. 64B, 64C, 64D, 64F, 64G, 64H, 64I. First gripping surface; 69. 69B, 69C, 69D, 69F. Tooth (first tooth); 74. 74B, 74C, 74D, 74F, 74G, 74H, 74I. First Two holding surfaces; 79B, 79C, 79D, 79E, 79F, tooth portion (second tooth portion); 100, 100B, 100C, 100D, 100E, 100F, 100G, 100H, 100I, 100J, 100K, disposal instrument; A, length direction; B, thickness direction, up and down direction, opening and closing direction; C, width direction, left and right direction; GP, holding surface; L1, length of the forceps in the width direction C; L2, length of the forceps in the length direction A; O5, central axis line of the forceps in the length direction; R, central axis line of pin 36; T, length of the forceps in the thickness direction B; W, opening width of the forceps.

Claims

1. A treatment device, wherein: The disposal device includes: jacket; a central axis member extending in a width direction orthogonal to the length direction of the sheath; and A forceps having a first forceps piece and a second forceps piece, wherein at least one of the first forceps piece and the second forceps piece is supported so as to be openable and closable about the central axis member. The length of the first forceps piece in the width direction is greater than or equal to the length of the first forceps piece in the length direction, and the length of the second forceps piece in the width direction is greater than or equal to the length of the second forceps piece in the length direction.

2. The treatment device according to claim 1, wherein: The lengths of the first forceps piece and the second forceps piece in the width direction are equal to or less than the maximum outer diameter of the sheath.

3. The treatment device according to claim 1 or 2, wherein: The length of the forceps in the width direction is not less than 1.0 times and not more than 1.6 times the length of the forceps in the longitudinal direction.

4. The treatment device according to claim 1 or 2, wherein: An open width of the forceps when the forceps are opened to the maximum extent is not less than 1.7 times and not more than 2.8 times the length of the forceps in the longitudinal direction.

5. The treatment device according to claim 1 or 2, wherein: A length of the forceps in a thickness direction perpendicular to the longitudinal direction when the forceps are closed is not less than 0.2 times and not more than 0.6 times the length of the forceps in the longitudinal direction.

6. The treatment device according to claim 1 or 2, wherein: The length of the pliers in the width direction is 1.1 times the length of the pliers in the length direction.

7. The treatment device according to claim 1 or 2, wherein: The opening width of the forceps when the forceps are opened to the maximum extent is 2.0 times the length of the forceps pieces in the longitudinal axis direction.

8. The treatment device according to claim 1 or 2, wherein: The length of the forceps in the thickness direction orthogonal to the longitudinal direction when the forceps are closed is 0.3 times the length of the forceps piece in the longitudinal direction.

9. The treatment device according to claim 1 or 2, wherein: The first forceps piece has a first gripping surface that contacts the second forceps piece when the forceps are closed, and a first tooth portion that protrudes toward the second forceps piece. The second forceps piece has a second gripping surface that contacts the first forceps piece when the forceps are closed and a second tooth portion that protrudes toward the first forceps piece. The first tooth portion and the second tooth portion have a planar shape and are located farther from a central axis in the longitudinal direction of the forceps than a gripping surface where the first gripping surface contacts the second gripping surface.

Images