Stopper and endoscope system using same

Abstract

To provide a stopper capable of preventing wounding of a body wall or the like by error, by excessive protrusion of a treatment instrument from an endoscope, and suppressing such a situation in which much time is required for insertion of the treatment instrument because of becoming too careful.SOLUTION: A stopper S1 is attached to a longitudinal shaped treatment instrument 3 which is introduced from an introduction hole 51a provided on an endoscope 5 and is inserted into a body through a lumen 51 of the endoscope 5, and the stopper is fixed to a portion of the treatment instrument 3 on a side closer to a base end relative to the introduction hole 51a, in a detachable manner, and restricts an entry degree of the treatment instrument 3 to the lumen 51 of the endoscope 5 by contact to the introduction hole 51a, so that, a tip part of the treatment instrument 3 does not protrude from a tip opening 51b of the lumen 51 by a length which is greater than a prescribed length L.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a stopper and an endoscope system using the same. [Background technology]

[0002] 2. Description of the Related Art As a medical instrument for examining the digestive tract and the like and for sampling and resecting tissue, for example, an endoscope equipped with a treatment tool such as forceps is known.

[0003] Such an endoscope is equipped with, for example, a camera having an objective lens attached to the tip for photographing the surgical field, and has an inner cavity along the long axis of the endoscope for inserting various treatment tools.

[0004] In such procedures using an endoscope, a treatment tool is introduced into the cavity and inserted into the body by protruding its tip from the tip opening of the endoscope, and various treatments (such as tissue sampling and resection) are performed using the treatment tool while the surgical field is viewed through a camera. Summary of the Invention [Problem to be solved by the invention]

[0005] The above-mentioned endoscopic procedures are usually performed in a narrow surgical field in a body cavity such as the inside of the digestive tract. Therefore, the distance from the tip opening of the endoscope through which the treatment tool protrudes to the body wall is short, and if the treatment tool is inserted forcefully, it may suddenly protrude from the opening and injure the body wall. On the other hand, if the treatment tool is inserted slowly, it takes a long time for the treatment tool introduced into the cavity to protrude from the opening, and there is a concern that the burden on the patient will increase due to the time required for the procedure.

[0006] It is also possible to provide a marking on the treatment tool to indicate the position information of the tip of the treatment tool. However, there are various endoscopes with different lengths depending on the purpose, and it is therefore difficult to provide a uniform marking on the treatment tool.

[0007] The present invention has been made based on the above-mentioned circumstances, and its object is to provide a stopper that can prevent accidental damage to the body wall, etc. due to excessive protrusion of a treatment tool from an endoscope, and can prevent the treatment tool from being inserted too cautiously and taking too long, and an endoscopic system using the same. [Means for solving the problem]

[0008] Some aspects of the present disclosure include: (1) A stopper attached to a longitudinal treatment tool that is introduced from an introduction port provided in an endoscope and inserted into a body cavity through an inner cavity of the endoscope, a stopper which is removably fixed to a portion of the treatment tool on the base end side of the introduction port, and which limits the degree to which the treatment tool advances into the lumen of the endoscope by abutting against the introduction port so that the distal end of the treatment tool does not protrude beyond a predetermined length from the distal end opening of the lumen; (2) A stopper body is provided, The stopper according to (1), wherein the stopper body is configured to clamp and fix a treatment tool; (3) A shaft member connected to the stopper body, The shaft member has a through passage for holding a treatment tool therein along a longitudinal axis thereof, The stopper according to (2), wherein at least a part of the shaft member is capable of entering an inner cavity of the endoscope through an introduction port. (4) The stopper according to (3) above, in which the stopper body and the shaft member are separable, and (5) A longitudinally shaped treatment tool; an endoscope having an inner cavity through which the treatment tool is inserted; An endoscope system comprising: a stopper attached to the treatment tool, the stopper being described in any one of (1) to (4).

[0009] In this specification, "distal side" refers to the direction along the long axis of the endoscope, and refers to the direction proceeding deeper into the body. "Proximal side" refers to the direction along the long axis of the endoscope, and refers to the direction opposite to the tip side. "Tip" refers to the tip end of any member or part, and "proximal end" refers to the base end of any member or part. "Long axis direction" refers to the direction along the longitudinal direction of the endoscope or treatment tool. Effect of the Invention

[0010] The present invention can provide a stopper that can prevent accidental damage to the body wall, etc. due to excessive protrusion of a treatment tool from an endoscope, and can prevent the time it takes to insert a treatment tool from being too cautious, and an endoscopic system using the same. [Brief description of the drawings]

[0011] [Figure 1A] FIG. 1 is a schematic perspective view of a first embodiment in an open state. [Figure 1B] FIG. 1 is a schematic perspective view of a first embodiment in a closed state. [Diagram 2] FIG. 2 is a schematic perspective view showing a state in which the stopper in FIGS. 1A and 1B is fixed to a treatment tool. [Figure 3A] FIG. 2 is a schematic side view showing a state in which the first embodiment is used. [Figure 3B] FIG. 2 is a schematic side view showing a state in which the first embodiment is used. [Figure 3C] 1 is a schematic side view showing a state in which the first embodiment is used. [Figure 3D] FIG. 2 is a schematic side view showing a state in which the first embodiment is used. [Figure 4A] FIG. 11 is a schematic perspective view of the second embodiment in an open state. [Figure 4B] FIG. 11 is a schematic perspective view of the second embodiment in a closed state. [Diagram 5] 4A and 4B is a schematic perspective view showing a state in which the stopper is fixed to a treatment tool. FIG. [Figure 6A]FIG. 11 is a schematic side view showing a state in which the second embodiment is used. [Figure 6B] FIG. 11 is a schematic side view showing a state in which the second embodiment is used. [Figure 6C] FIG. 11 is a schematic side view showing a state in which the second embodiment is used. [Figure 6D] FIG. 11 is a schematic side view showing a state in which the second embodiment is used. [Figure 7A] FIG. 13 is a schematic perspective view showing a third embodiment, in which the stopper body and the shaft member are combined together in an open state. [Figure 7B] FIG. 13 is a schematic perspective view showing a third embodiment, in which the stopper body and the shaft member are separated from each other in an open state. [Figure 8A] FIG. 11 is a schematic side view showing a state in which the third embodiment is used. [Figure 8B] FIG. 11 is a schematic side view showing a state in which the third embodiment is used. [Figure 8C] FIG. 11 is a schematic side view showing a state in which the third embodiment is used. [Figure 9] FIG. 13 is a schematic side view showing a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, the embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the embodiments shown in the drawings. The dimensions shown in each drawing are for ease of understanding of the implementation contents, and do not necessarily correspond to the actual dimensions. In Figures 3A to 3D, 6A to 6D, and 8A to 8C, the left side of the drawing indicates the tip side (distal), and the right side indicates the base side (proximal, hand side).

[0013] <Stopper> The stopper of the present disclosure is a stopper that is attached to a longitudinal treatment tool that is introduced through an introduction port provided on an endoscope and inserted into the body via the inner cavity of the endoscope, and is removably fixed to a portion of the treatment tool on the base end side of the introduction port, and limits the degree to which the treatment tool advances into the inner cavity of the endoscope by abutting against the introduction port so that the tip of the treatment tool does not protrude more than a predetermined length from the tip opening of the inner cavity.

[0014] The treatment tool to which the stopper of the present disclosure is applied is a longitudinal medical instrument inserted into the body. Examples of the treatment tool include forceps for grasping and collecting tissue from the body wall (e.g., see forceps 31 in FIG. 3A), a snare (not shown) for removing polyps and the like that occur in the body wall, and a syringe (not shown) for injecting medicine into tissue.

[0015] An endoscope to which the stopper of the present disclosure is applied is a longitudinal medical instrument inserted into the body. The endoscope has an introduction port located at the base end, a distal end opening located at the tip, and an inner cavity extending from the introduction port to the distal end opening and through which a treatment tool can be inserted (see, for example, endoscope 5 in FIG. 3A).

[0016] [First embodiment] 1A and 1B are schematic perspective views showing a first embodiment. As shown in FIG. 3C, the stopper S1 is an instrument attached to a longitudinal treatment tool 31(3) that is introduced from an introduction port 51a provided in an endoscope 5 and inserted into a body via an inner cavity 51 of the endoscope 5. As shown in FIG. 1A and 1B, the stopper S1 is generally composed of a stopper body 11. Note that FIG. 1A shows the stopper S1 in an open state (a state when not fixed to a treatment tool, the same applies below), and FIG. 1B shows the stopper S1 in a closed state (a state when fixed to a treatment tool, the same applies below).

[0017] The stopper body 11 is a member that detachably fixes the stopper S1 to a portion of the treatment tool 3 on the proximal side of the introduction port 51a. As shown in FIG. 2, the stopper body 11 fixes the treatment tool 31(3) by sandwiching it. Specifically, the stopper body 11 can be composed of a first piece 111 that contacts the outer periphery of the treatment tool 3, and a second piece 112 that is arranged to face the first piece 111 across the treatment tool 3 and contacts the outer periphery of the treatment tool 3. The first piece 111 and the second piece 112 are connected to each other so as to be openable and closable by a hinge 113 provided at one end of the first piece 111 and the second piece 112, for example. In such a stopper body 11, a fixing hole 11h is formed by closing the first piece 111 and the second piece 112 together, and the treatment tool 3 is sandwiched and held in the fixing hole 11h. For example, the first piece 111 and the second piece 112 may be provided with an engaging portion 111a and an engaged portion 112a, respectively, and the stopper S1 is fixed to the treatment tool 3 by engaging the engaging portion 111a with the engaged portion 112a.

[0018] 3C, the stopper body 11 limits the degree of entry of the treatment tool 3 into the lumen 51 of the endoscope 5 by abutting against the introduction port 51a so that the tip of the treatment tool 3 does not protrude beyond a predetermined length Lmax from the tip opening 51b of the lumen 51. Specifically, the stopper body 11 has an abutting portion 11a that abuts against the introduction port 51a (abutted portion) of the endoscope 5. When this abutting portion 11a abuts against the introduction port 51a of the endoscope 5, further entry of the treatment tool 3 into the lumen 51 is prevented, and the treatment tool 3 can be prevented from protruding from the tip opening 51b of the endoscope 5 beyond the predetermined length Lmax.

[0019] It is preferable that the material constituting the stopper body 11 has a rigidity that allows it to be reliably fixed to the treatment tool 3 and to abut against the abutted portion 51a of the endoscope 5 to restrict the entry of the treatment tool 3. Examples of the above-mentioned material include resin materials such as fluororesin, polyethylene resin, and silicone rubber, and metal materials such as stainless steel.

[0020] The portions of the first piece 111 and the second piece 112 that clamp the treatment tool 3 may be flexible and have a structure that is not easily slidable. Specifically, for example, a pad (not shown) that has the above-mentioned characteristics and directly contacts the treatment tool 3 may be provided on the surface of each of the first piece 111 and the second piece 112. This prevents the stopper S1 and the treatment tool 3 from being damaged, and prevents the stopper S1 from shifting out of position relative to the treatment tool 3, allowing the stopper S1 to be reliably fixed to the treatment tool 3. In addition, since the stopper S1 and the treatment tool 3 are not damaged, they can be reused.

[0021] Examples of materials for forming the pad include resin materials such as fluororesin, polyethylene resin, and silicone rubber.

[0022] Next, a usage mode of the stopper S1 will be described. Here, a procedure will be described in which an endoscope 5 is inserted into the stomach through the oral cavity, and tissue from a lesion in the stomach wall is collected using a treatment tool 3. As shown in Figs. 2 and 3A, the treatment tool 3 is exemplified by a forceps 31 having a forceps body 311 arranged at the tip to grasp and collect tissue, a wire 312 for moving the forceps body 311, a tube 313 for storing the wire 312 inside, and an operation unit 314 arranged on the proximal side to move the forceps body 311 via the wire 312. As shown in Fig. 3A, the endoscope 5 is exemplified by an endoscope having an inner cavity 51 for inserting the forceps 31 from an introduction port 51a to a tip opening 51b, and an objective lens 52 facing the surgical field attached to the tip. An image of the surgical field obtained through the objective lens 52 can be displayed on a monitor outside the body via an image sensor (not shown), for example.

[0023] [Attaching a stopper to a treatment tool] First, prior to inserting the endoscope 5 into the body, the stopper S1 is attached to the treatment tool 3. Specifically, as shown in Fig. 3A, for example, the endoscope 5 and the forceps 31 to be used in the procedure are each extended straight and aligned in parallel so that the position of the tip opening 51b (the opening through which the tip of the forceps 31 protrudes) of the endoscope 5 and the position of the tip of the forceps main body 311 are aligned.

[0024] Next, as shown in Fig. 2 and Fig. 3B, while the tube 313 of the forceps 31 is sandwiched between the first piece 111 and the second piece 112 of the stopper body 11, the abutting part 11a of the stopper body 11 is arranged so as to be a predetermined distance L1 from the introduction port 51a (abutted part) toward the base end side. Next, while maintaining the position of the stopper body 11, the engaging part 111a of the stopper body 11 is engaged with the engaged part 112a, thereby fixing the forceps 31 in the formed fixing hole 11h. Note that the predetermined distance L1 can be set to the same length as the maximum length (predetermined length Lmax) that the forceps 31 is allowed to protrude from the distal end opening 51b, for example, depending on the size of the surgical field.

[0025] [Insertion of treatment tools into the body] Next, the treatment tool 3 to which the stopper S1 is attached is inserted into the lumen (body) of the endoscope 5. Specifically, first, the forceps body 311 is inserted into the introduction port 51a, and then the forceps 31 is introduced into the lumen 51 by pushing the operation part 314 while holding it. Next, when the forceps 31 are further pushed, the forceps body 311 protrudes from the distal end opening 51b of the endoscope 5 as shown in FIG. 3C, and the forceps 31 is inserted into the body. At this time, even if the forceps body 311 suddenly protrudes from the distal end opening 51b by quickly pushing the forceps 31 into the lumen 51, the abutment part 11a of the stopper body 11 abuts against the introduction port 51a (abutted part) of the endoscope 5, so that the forceps body 311 does not protrude beyond the predetermined length Lmax from the distal end opening 51b.

[0026] [Operation of treatment tools] Next, the treatment tool 3 is operated. Specifically, as shown in Fig. 3D, the forceps body 311 is opened by moving the wire 312 in the longitudinal direction by operating the operating part 314 of the forceps 31, and then the wire is further operated by the operating part 314 to grasp the lesion B and collect the tissue.

[0027] [Removal of treatment tools from the body] Next, the treatment tool 3 is removed to the outside (outside the body) of the endoscope 5. Specifically, while the harvested tissue is being grasped by the forceps body 311, the forceps 31 is retracted while gripping the operation portion 314 and pulled out from the lumen 51. This causes the forceps 31 to be removed from the endoscope 5, and the procedure using the forceps 31 is completed.

[0028] After the procedure using the forceps 31, other procedures may be performed using other treatment tools as necessary. In this case, the other treatment tools may also use the same or different stoppers and endoscopes to perform other procedures in a similar manner.

[0029] As described above, the stopper S1 limits the degree to which the treatment tool 3 advances into the lumen 51 of the endoscope 5 by abutting against the introduction port 51a, so that the maximum protruding length of the treatment tool 3 from the endoscope 5 can be limited to a predetermined length Lmax by a simple method, and it is possible to prevent the treatment tool 3 from accidentally damaging the body wall or the like due to excessive protrusion from the endoscope 5. In addition, since the treatment tool 3 can be quickly pushed into the lumen 51, it is possible to prevent the treatment tool 3 from being inserted too cautiously and taking too long, and as a result, the burden on the patient can be reduced by shortening the time for the procedure.

[0030] Moreover, the stopper S1 of the present embodiment is fixed so that the stopper body 11 sandwiches the treatment tool 3. Therefore, the stopper S1 can be made to have a simple configuration, and the stopper S1 can be fixed to the treatment tool 3 quickly and reliably.

[0031] [Second embodiment] 4A and 4B are schematic perspective views showing the second embodiment. As shown in FIGS. 4A and 4B, the stopper S2 is generally composed of a stopper body 12 and a shaft member 22. The stopper S2 differs from the first embodiment in that it includes the stopper body 12 and the shaft member 22. In this embodiment, the configuration of the stopper body 12 other than the configuration of the stopper body 12 described below is the same as that of the first embodiment. Note that FIG. 4A shows the stopper S2 in an open state, and FIG. 4B shows the stopper S2 in a closed state.

[0032] The stopper body 12 is a member that detachably fixes the stopper S2 to a portion of the treatment tool 3 on the proximal side of the introduction port 51a. As shown in FIG. 5, the stopper body 12 fixes the treatment tool 3 so as to sandwich it. The stopper body 12 of this embodiment is composed of a first piece 121 that contacts the outer periphery of the treatment tool 3, and a second piece 122 that is arranged to face the first piece 121 across the treatment tool 3 and contacts the outer periphery of the treatment tool 3. The first piece 121 and the second piece 122 are connected to each other so as to be able to open and close by a hinge 123 provided at one end of the first piece 121, and the stopper S2 is fixed to the treatment tool 3 by engaging an engaging portion 121a provided on the first piece 121 with an engaged portion 122a provided on the second piece 122.

[0033] The shaft member 22 is a member connected to the stopper body 12. The shaft member 22 has a through hole 22h penetrating along the longitudinal direction for holding the treatment tool 3 inside. The through hole 22h can be provided so as to be continuous with the fixing hole 12h formed by the first piece 121 and the second piece 122, for example. The length of the shaft member 22 in the longitudinal direction is not particularly limited, and may be formed so as to be longer than a predetermined length Lmax, for example.

[0034] The stopper body 12 and the shaft member 22 may be integrally formed, or may be formed as separate bodies so as to be separable. In this embodiment, the stopper body 12 and the shaft member 22 are integrally formed.

[0035] At least a part of the shaft member 22 is formed so that the outer diameter of the part of the shaft member 22 entering the lumen 51 is smaller than the inner diameter of the lumen 51 so that the shaft member 22 can enter the lumen 51 of the endoscope 5 through the introduction port 51a. For example, a mouth rubber 53 may be provided on the inner circumference of the introduction port 51a of the lumen 51 (see FIG. 6A). By bringing the outer circumferential surface of the shaft member 22 into close contact with the mouth rubber 53, the shaft member 22 is permitted to move through the lumen 51 while keeping the lumen 51 liquid-tight or air-tight.

[0036] The material forming the shaft member 22 preferably has flexibility so that it can enter the lumen 51 without interfering with the movement of the endoscope 5. In addition, the material forming the shaft member 22 is also preferably made of a slippery material so that it can easily move through the lumen 51. The material forming the stopper body 12 and the material forming the shaft member 22 may be the same or different.

[0037] A scale may be provided along the long axis direction on the outer circumferential surface of the shaft member 22. The scale may be, for example, an index showing the distance from the abutment portion 12a of the stopper body 12, or may be an index showing the distance from the end of the shaft member 22 opposite to the abutment portion 12a. This allows the extent to which the treatment tool 3 protrudes from the distal end opening 51b (current protruding length L) to be easily and accurately grasped, allowing for more precise procedures.

[0038] The outer peripheral surface of the shaft member 22 may be formed unevenly. Examples of the uneven shape include continuous or discontinuous linear protrusions or grooves provided along the longitudinal direction, and annular or arc-shaped protrusions or grooves provided in the circumferential direction. The protrusions and grooves can be provided at predetermined locations (one or more predetermined locations) of the shaft member. This allows the surgeon to use the protrusions and grooves as a guide to perform the procedure without visually checking the stopper.

[0039] Next, the use of the stopper S2 will be described. Note that since the operation of the treatment tool and the removal of the treatment tool from the body are the same as in the first embodiment, only the attachment of the stopper to the treatment tool and the insertion of the treatment tool into the body will be described here.

[0040] [Attaching a stopper to a treatment tool] The stopper S2 can be attached to the treatment tool 3 as follows. That is, as shown in Fig. 6A, for example, the endoscope 5 and the forceps 31 used in the procedure are each extended straight and arranged in parallel so that the position of the tip opening 51b of the endoscope 5 (the opening from which the tip of the forceps 31 protrudes) and the position of the tip of the forceps main body 311 are aligned.

[0041] 6B, the tube 313 of the forceps 31 is passed through the through passage 22h of the shaft member 22, and while the tube 313 of the forceps 31 is sandwiched between the first piece 121 and the second piece 122 of the stopper body 12, the abutting part 12a of the stopper body 12 is positioned at a predetermined distance L1 (for example, a predetermined length Lmax) from the introduction port 51a (abutted part) toward the base end side. Next, while maintaining the position of the stopper body 12, the engaging part 121a of the stopper body 12 is engaged with the engaged part 122a, thereby fixing the forceps 31 in the formed fixing hole 12h.

[0042] [Insertion of treatment tools into the body] The treatment tool 3 to which the stopper S2 is attached can be inserted into the body as follows. That is, first, the tip of the forceps 31 is inserted into the introduction port 51a, and then the forceps 31 is introduced into the lumen 51 by pushing the forceps 31 while holding the operation part 314. Next, when the forceps 31 are further pushed, the forceps main body 311 protrudes from the tip opening 51b of the endoscope 5 as shown in FIG. 6C, and the forceps 31 is inserted into the body. At this time, since the tip side part of the shaft member 22 also enters the lumen 51 from the introduction port 51a, for example, the current protruding length L of the tip of the forceps 31 from the tip opening 51b can be grasped by reading the scale of the shaft member 22 at the position of the introduction port 51a (contact part). Also, as shown in FIG. 6D, when the contact part 12a of the stopper main body 12 is pushed until it abuts against the introduction port 51a (contact part) of the endoscope 5, the forceps 31 cannot enter the lumen 51 any further. Therefore, the forceps body 311 does not protrude beyond the predetermined length Lmax from the distal end opening 51b.

[0043] As described above, since the stopper S2 has the above-mentioned configuration, the maximum protruding length of the treatment tool 3 from the endoscope 5 can be limited to the predetermined length Lmax by a simple method. In addition, since the stopper S2 includes the shaft member 22, the current protruding length L can be easily grasped from the length of the shaft member 22 exposed to the outside of the introduction port 51a. That is, when the treatment tool 3 is introduced into the body, the timing when the tip of the treatment tool 3 protrudes from the tip opening 51b of the endoscope 5 can be sensed without looking at the hand only by the feeling of the hand when touching the shaft member 22. For example, the treatment tool 3 can be quickly fed into the endoscope 5 until the hand touches the shaft member 22, and the speed of feeding can be slowed down at the stage when the hand touches the shaft member 22, so that the tip of the forceps 31 can be carefully protruded from the tip opening 51b of the endoscope 5.

[0044] [Third embodiment] 7A and 7B are schematic perspective views showing the third embodiment. As shown in FIG. 7A and FIG. 7B, the stopper S3 is generally composed of a stopper body 13 and a shaft member 23. The stopper S3 of this embodiment differs from the second embodiment in that the stopper body 13 and the shaft member 23 are configured to be separable from each other. In this embodiment, the configurations of the stopper body 13 and the shaft member 23 other than the configurations of the stopper body 13 and the shaft member 23 shown below are the same as those of the second embodiment. Note that FIG. 7A shows a diagram in an open state when the stopper body 13 and the shaft member 23 are combined, and FIG. 7B shows a diagram in an open state when the stopper body 13 and the shaft member 23 are separated from each other.

[0045] The stopper body 13 detachably fixes the stopper S3 to a portion of the treatment tool 3 on the proximal side of the introduction port 51a. The stopper body 13 fixes the treatment tool 3 so as to sandwich it. The stopper body 13 of this embodiment is composed of a first piece 131 that contacts the outer periphery of the treatment tool 3, and a second piece 132 that is arranged to face the first piece 131 across the treatment tool 3 and contacts the outer periphery of the treatment tool 3. The first piece 131 and the second piece 132 are connected to each other so as to be able to open and close by a hinge 133 provided at one end of the first piece 131 and the second piece 132, and the stopper S3 is fixed to the treatment tool 3 by engaging an engaging portion 131a provided on the first piece 131 with an engaged portion 132a provided on the second piece 132.

[0046] The shaft member 23 is a portion connected to the stopper body 13. The shaft member 23 has a through hole 23h penetrating therethrough along the longitudinal direction for holding the treatment tool 3. At least a portion of the shaft member 23 can enter the inner cavity 51 of the endoscope 5 through the introduction port 51a.

[0047] In this embodiment, the stopper body 13 and the shaft member 23 are formed as separate bodies so as to be separable. The structure for separating the two is not particularly limited as long as it does not impair the effect of the present invention. In this embodiment, a connecting portion 23b provided at one end of the shaft member 23 is detachably attached to a connected portion 13b provided on the stopper body 13 so that the stopper body 13 and the shaft member 23 can be combined or separated. In addition, when the stopper body 13 and the shaft member 23 are combined, the through passage 23h is formed so as to be continuous with the fixing hole formed by the first piece 131 and the second piece 132.

[0048] Next, the use of the stopper S3 will be described. Note that the "insertion of the treatment tool into the body" is the same as in the second embodiment, and the "operation of the treatment tool" and "removal of the treatment tool from the body" are the same as in the first embodiment. Therefore, only the "attachment of the stopper to the treatment tool" will be described here.

[0049] [Attaching a stopper to a treatment tool] The stopper S3 can be attached to the treatment tool 3 as follows. That is, as shown in Fig. 8A, for example, the endoscope 5 and the forceps 31 used in the procedure are each extended straight and arranged in parallel so that the position of the tip opening 51b of the endoscope 5 (the opening through which the tip of the forceps 31 protrudes) and the position of the tip of the forceps main body 311 are aligned.

[0050] Next, in a state where the stopper body 13 and the shaft member 23 are separated, they are attached to the treatment tool 3. First, as shown in FIG. 8B, the tube 313 of the forceps 31 is inserted through the through passage 23h of the shaft member 23. Next, as shown in FIG. 8C, while the tube 313 of the forceps 31 is sandwiched between the first piece 131 and the second piece 132 of the stopper body 13, the abutting part 13a of the stopper body 13 is arranged so as to be a predetermined distance L1 (for example, a predetermined length Lmax) from the introduction port 51a (abutted part) toward the base end side. Next, while maintaining the position of the stopper body 13, the connecting part 23b of the shaft member 23 is connected to the connected part 13b of the stopper body 13 to combine the two, and then the engaging part 131a of the stopper body 13 is engaged with the engaged part 132a to fix the forceps 31 in the formed fixing hole.

[0051] As described above, since the stopper S3 has the above-mentioned configuration, it is possible to simply limit the maximum protruding length of the treatment tool 3 from the endoscope 5 to a predetermined length Lmax. Furthermore, since the stopper S3 is configured so that the stopper body 13 and the shaft member 23 can be separated, the stopper S3 connected to the shaft member 23 can be used, or the stopper body 13 can be used alone, depending on the procedure.

[0052] <Endoscope system> The endoscope system of the present disclosure includes a longitudinal treatment tool, an endoscope having an inner cavity through which the treatment tool is inserted, and the stopper of the present disclosure attached to the treatment tool.

[0053] [Fourth embodiment] Fig. 9 is a schematic side view showing the fourth embodiment. As shown in Fig. 9, the endoscope system C1 is generally composed of a treatment tool 3, an endoscope 5, and a stopper S1. In this embodiment, the configurations of the treatment tool 3, the endoscope 5, and the stopper S1 are the same as those described in the first embodiment. Note that the same parts are given the same reference numerals and detailed description thereof is omitted. In addition, the usage mode of the endoscope system C1 is similar to the usage mode of the stopper S1, the treatment tool 3, and the endoscope 5 described in the first embodiment.

[0054] The treatment tool 3 is a longitudinal medical instrument that is introduced from an introduction port 51a provided in the endoscope 5 and inserted into the body via the inner cavity 51 of the endoscope 5. The treatment tool 3 performs treatments such as collection, excision, and administration of medicine on tissues (such as lesions) inside the body. Examples of the treatment tool 3 include forceps for grasping and collecting tissues from the body wall, a snare for excising polyps and the like that have developed in the body wall, and a syringe for injecting medicine into tissues. In this embodiment, forceps 31 is illustrated as an example.

[0055] The endoscope 5 is a medical instrument inserted into the body. The endoscope 5 is provided with an introduction port 51a located at the base end, a tip opening 51b located at the tip, and a lumen 51 through which the treatment tool 3 is inserted from the introduction port 51a to the tip opening 51b. For example, an objective lens 52 for photographing the surgical field is provided at the tip of the endoscope 5, and an image of the surgical field captured by the objective lens 52 is converted into an electric signal by an image sensor 53, and this electric signal is transmitted to a monitor (not shown) outside the body through an electric cable 54. The endoscope 5 may have a lighting device (not shown) at its tip for illuminating the surgical field.

[0056] The stopper S1 is a device attached to the treatment tool 3. The stopper S1 is detachably fixed to a portion of the treatment tool 3 on the proximal side of the introduction port 51a, and limits the degree to which the treatment tool 3 advances into the lumen 51 of the endoscope 5 by abutting against the introduction port 51a so that the distal end of the treatment tool 3 does not protrude from the distal opening 51b of the lumen 51 beyond a predetermined length Lmax.

[0057] As described above, since the endoscope system C1 has the above-mentioned configuration, it is possible to limit the maximum protruding length of the treatment tool 3 from the endoscope 5 to a predetermined length Lmax by a simple method, and it is possible to prevent the treatment tool 3 from protruding excessively from the endoscope 5 and accidentally damaging the body wall, etc. Furthermore, since the treatment tool 3 can be quickly pushed into the lumen 51, it is possible to prevent the treatment tool 3 from being inserted too cautiously and taking too long, and as a result, the burden on the patient can be reduced by shortening the time for the procedure.

[0058] The present invention is not limited to the configurations of the above-described embodiments, but is intended to include all modifications within the scope of the claims and meaning equivalent to the scope of the claims. A part of the configurations of the above-described embodiments may be deleted or replaced with another configuration, or another configuration may be added to the configurations of the above-described embodiments.

[0059] For example, in the above-mentioned embodiment, the stoppers S1, S2, and S3 including the stopper bodies 11, 12, and 13 that fix the treatment tool 3 so as to pinch it have been described. However, any configuration of the stopper may be used as long as it is possible to limit the degree to which the treatment tool advances into the lumen of the endoscope by abutting against the introduction port (abutted portion). For example, a band or the like that is fixed by wrapping around the outer periphery of the treatment tool may be used as the stopper. With such a stopper, the degree to which the treatment tool advances into the lumen can be limited by abutting the end of the wrapped band against the introduction port of the endoscope.

[0060] In the second and third embodiments described above, the stoppers S2, S3 are provided with the shaft members 22, 23 having the through-hole-like through passages 22h, 23h for holding the treatment tool 3 inside along the long axis direction. However, the shaft member only needs to be capable of holding the treatment tool, and for example, a continuous slit may be provided along the long axis direction of the stopper on the outer periphery of the shaft member and / or the stopper body so that the treatment tool can be attached from the outer periphery side of the shaft member or the stopper body. This allows the tube of the treatment tool to be attached to the through passage of the shaft member or the fixing hole of the stopper body through the slit.

[0061] In the above-described embodiment, the endoscope system C1 is provided with the stopper S1. However, the endoscope system may be provided with any of the stoppers disclosed herein. [Explanation of symbols]

[0062] Stoppers S1, S2, S3 Stopper body 11, 12, 13 Shaft member 22, 23 Passageway 22h,23h Treatment tools 3 Endoscope 5 lumen 51 Inlet 51a Tip opening 51b Endoscopy System C1

Claims

1. A stopper attached to a longitudinal treatment tool that is introduced from an introduction port provided in an endoscope and inserted into a body cavity through an inner cavity of the endoscope, A stopper body that clamps and fixes the treatment tool; a shaft member connected to the stopper body, The shaft member has a through passage for holding the treatment tool therein along a longitudinal axis thereof, At least a portion of the shaft member is capable of entering an inner cavity of the endoscope through the introduction port, The stopper body and the shaft member are separable, A stopper that is removably fixed to a portion of the treatment tool on the base end side of the introduction port, and that limits the degree to which the treatment tool advances into the inner cavity of the endoscope by abutting against the introduction port so that the tip of the treatment tool does not protrude beyond a predetermined length from the tip opening of the inner cavity.

2. A longitudinal treatment tool, an endoscope having an inner cavity through which the treatment tool is inserted; An endoscope system comprising: a stopper attached to the treatment tool, the stopper being the stopper according to claim 1.

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