JP2005349000A - Lifting utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lifting utensil by which the inserting and taking out operations of a lifting section to/from a body cavity are easy, and which is excellent in operability such as having a degree of freedom in the lifting direction. <P>SOLUTION: This lifting utensil is constituted of a tubular external cylinder 1, a shaft body 2 which moves the internal cavity of the external cylinder 1 in the axial direction, an elastic wire 3 which is connected with both of the external cylinder 1 and the shaft body 2, and fastening means (41, 42 and 44) which restrict the movability of the external cylinder 1 and the shaft body 2. Then, the lifting utensil is constituted in such a manner that by making the external cylinder 1 and the shaft body 2 relatively movable, the lifting section which engages and holds a body internal tissue such as an internal organ may be formed by the expansion of the elastic wire 3 outward from a closed state, and the further reversion of a part. Also, when required, the elastic wire 3 is constituted by providing two pairs for which the attaching angles to the shaft body 2 are different. In addition, the lifting utensil is constituted by providing a blade tip on the distal end of the shaft body 2 when required. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lifting device for lifting a stomach wall or abdominal wall from outside the body and holding a target organ in an endoscopic surgical operation.

In recent years, endoscopic surgery has been applied and selected for many surgical operations because of its small invasion, so that there is little post-operative pain and early discharge and early return to society are possible. This endoscopic surgical operation is an operation that can be carried out while observing an endoscopic image using an endoscope or surgical instrument inserted through a mantle tube (tracar) placed through the abdominal wall and placed in the body cavity. Among these, as a technique to be performed by lifting and holding an organ or the like from outside the body targeted by the present invention, for example, an abdominal cavity operated on gastric mucosal cancer that is judged to have no lymph node metastasis, for example There is a local resection of the stomach. In the laparoscopic local gastrectomy, a method of raising the lesioned part and cutting the part of the lesion is established, and as a technique, an endoscopic intraoral endoscopic procedure is performed. Insert a mirror, inflate gastric gas to inflate the stomach, confirm the exact position of the lesion, determine the excision range, and insert from the trocar while observing the endoscopic screen inside the stomach and abdominal cavity The stomach wall marked with the two forceps is gripped and raised, the stomach wall in the vicinity of the lesion is penetrated by the puncture needle composed of the inner and outer double needles, the inner needle is removed after insertion, and the metal rod is passed through the lumen of the puncture needle A T-shaped T-bar 9 (see FIG. 9) with a wire 92 attached to the center of 91 is inserted into the stomach, the puncture needle is removed, and then the wire 92 of the T-bar 9 is pulled up so that the metal rod 91 is The lesion is lifted by the gastric mucosa It is a technique that inserts an automatic anastomosis device from the trocar and removes the stomach lesion when the stomach wall is lifted. In this case, a single T-bar may cause the lesion to be lifted up and cannot be excised successfully. In such a case, it is necessary to insert another T-bar on the opposite side and lift it up securely. Has occurred.
In addition, as another endoscopic procedure using a lifting device, a tube (passage) for supplying nutrients directly into the stomach from the port provided on the abdominal body surface for patients who are difficult to eat orally There is an endoscopic gastrostomy. There are several methods for this procedure. One of them is a T-bar lifting device as described above, which is inserted into the stomach through the puncture needle in the same manner as in the procedure described above. There is a technique of pulling the wire, raising the stomach wall, bringing the stomach wall into contact with the abdominal wall, and introducing and placing the gastrostomy tube into the stomach.

And as a device for lifting the stomach wall for these procedures, a T-shaped T-bar device in which a wire 92 is fixed in the hole or groove provided in the central portion of the metal rod 91 as described above, Proposed for the purpose of improving the operability of the T-bar, it can be slid along the loop-shaped wire to the T-bar section consisting of a rigid rod and a wire engaged in a loop at the center. It consists of a tethered pushing tube and a sheath tube that houses the rod and the vicinity of the tip of the pushing tube. The rod is housed in the sheath tube, and the pushing tube abuts against the rear end of the rod, and at least its tip. The pushing tube is a push rod that pushes the rod into the stomach, and at the same time, Ri lifting body organ is also a gripping portion of again lifting the stomach wall tool is disclosed. (See Patent Document 1)
JP-A-8-71074

However, in the conventional T-bar device, when the metal rod portion is inserted into the stomach through the puncture needle lumen, the flexible wire is picked and pushed. The danger of falling is pointed out. On the other hand, in the instrument of Patent Document 1, by using a pushing tube at the time of insertion, the problem at the time of insertion is solved and the workability is improved. However, the lesion site in laparoscopic local gastrectomy is improved. When removing the metal rod from the body cavity after excision, it is necessary to cut the wire, put it in the organ storage bag together with the excised organ using forceps etc., and remove it from the trocar hole provided elsewhere. Care must be taken and troublesome to handle the small metal rod after cutting with forceps, and there is a risk that it will fall into the abdominal cavity, and that troublesome operations such as searching and capturing will be required. On the other hand, regarding endoscopic gastrostomy, since the metal rod remains in the stomach after the gastrostomy tube is placed, conventionally, in order to remove the metal rod, another catheter is only used for the removal. Therefore, the work of inserting the metal rod into the stomach along the wire of the T-bar and taking out the metal rod into the catheter is troublesome, so that the procedure becomes troublesome and the workability is poor and the usability is poor.

Moreover, since the wire of the conventional T-bar including patent document 1 is thin and flexible, when lifting a stomach wall, if a rod is not substantially perpendicular | vertical with respect to the lifting direction of a wire, lifting will not be successful. Thus, there is a concern that it is difficult to lift the stomach wall in a desired direction such as an oblique direction. In addition, depending on the mounting position, the lift may be uneven, and the excision may not be successful, and another lifting device must be used.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lifting device that is easy to insert and remove a lifting portion into a body cavity such as the inside of a stomach, is reliable in lifting, and has excellent flexibility in the lifting direction. did.

The lifting device of the present invention is provided with a tubular outer cylinder, a rod-shaped shaft body that protrudes from the outer cylinder, moves in the axial direction of the outer cylinder, and the outer cylinder and a distal end portion of the shaft body. A pair of elastic wires forming a shaft object on the shaft body with both ends fixed, and a locking means for restricting the movement of the outer cylinder and the shaft body, and the outer cylinder and the shaft When the body is moved relatively, the elastic wire expands outward from the closed state and further partially reverses to form a lifting part that engages and holds the body tissue such as an organ. Configured. In this case, the elastic wire is preferably formed by brazing in advance in the expanding direction when it is fixed to the outer cylinder and the shaft body, and the elastic wire is a superelastic alloy. Or a shape memory alloy.

Further, as another configuration, a tubular outer cylinder, a rod-shaped shaft body that protrudes from the outer cylinder and moves in the axial direction of the lumen of the outer cylinder, and is formed into a curved shape like a long-axis droplet, Both ends are fixed to the outer cylinder, the curved end is penetrated and held at the tip of the shaft body, and constituted by a locking means for restricting the movement of the outer cylinder and the shaft body, When the cylindrical body and the shaft body are moved relative to each other, the elastic wire expands outward from the shape of a long-axis droplet and further partially reverses to engage and hold in a body tissue such as an organ. The lifting portion is formed. The elastic wire is preferably composed of a superelastic alloy or a shape memory alloy.

Furthermore, if necessary, the elastic wire may be provided in two pairs with different angles of attachment to the shaft body, for example, so as to form a cross shape when viewed from above, and at the tip of the shaft body. May be provided with a cutting edge.

According to the lifting device of the present configuration, the elastic wire protrudes from the outer tube of the device by being configured to be fixed or held at both ends of the outer tube and the shaft body protruding from the outer tube. After inserting the shaft body part into the stomach or the like, the outer cylinder and the shaft body are moved relatively, that is, the outer cylinder is held and the shaft body is pulled to bring the distal end portion of the outer cylinder closer to the distal end portion of the shaft body. As a result, the elastic wire is bent and expanded outward (in the width direction) against the elasticity from the closed state to form a wide droplet shape, and when further pulled, the elastic wire is partially from the tip side. Is inverted, and a lifting part is formed in the form of two droplet-type wings that are axisymmetric with respect to the shaft body. In this state, when the movement is restricted by the locking means and this shape is maintained, the stomach wall or the like can be lifted by the wing-shaped shoulder (lifting portion) of the elastic wire.
Due to this action, when inserting the device into the body cavity, the body cavity is passed through the incision hole or the lumen of the puncture needle in the closed state, or if necessary, by crushing the elastic wire and making the diameter as small as possible. When inserted into the interior and inserted, as described above, if the outer cylinder and the shaft body are relatively moved, the elastic wire can be changed in shape and can be lifted. On the other hand, when the procedure is finished and the device is taken out from the body cavity, the locking means for restricting the movement of the outer cylinder and the shaft body is released, and the outer cylinder and the shaft body are relatively moved in the opposite directions. The part inserted into the body cavity is made thinner (straightened) by returning the original elastic wire to the closed state by holding the outer cylinder and pushing out the shaft body. Therefore, the instrument can be taken out from the inside of the body cavity as it is, and no other instrument is required for taking out as in the prior art, and the instrument does not require troublesome insertion and removal operations.

In addition, the shaft body that becomes the grasping part when lifting the stomach wall and the elastic wire that becomes the lifting part are not flexible like conventional wires but have rigidity. Since uniform lifting can only be expected with respect to the vertical lifting direction, the lifting direction by the lifting portion of the elastic wire follows the lifting direction of the shaft body (the lifting direction from the outside of the body). An easy-to-use instrument that can be lifted in an oblique direction with respect to the abutting organ, and can be lifted in a direction that facilitates surgery depending on the case by increasing the degree of freedom in the lifting direction. can do.

Here, when comparing the two main components shown in the present solution, first, one end of the elastic wire is formed on the outer cylinder, the other end is formed on the shaft, and the shaft object is formed on the shaft. Compared with the latter, which will be described later, the device fixed to the body is less bulging in the closed state, and the outer diameter that becomes the body cavity insertion portion can be formed narrower. It is possible from a puncture needle of diameter. On the other hand, the manufacturing process such as the process of fixing the elastic wire to a small-diameter shaft body is troublesome, and the elastic wires that expand in the width direction are independent of each other. Since it is expected that the shaft object will not be formed due to instability, as described above, when the elastic wire is fixed to the outer cylinder and the shaft body, the elastic wire is pre-curved in the expanding direction. For example, it is necessary to have a function of expanding to the axis target. However, if these negative points are cleared, the ideal instrument of the present invention can be obtained.
On the other hand, in an instrument in which an elastic wire is curved and formed into a long-axis droplet, both ends are fixed to the outer cylinder, and the curved end is passed through and held at the tip of the shaft, it is elastic when closed as described above. Since the wire is in the form of a long-axis droplet, it is necessary to crush the entire body when inserting it into the body cavity from the insertion hole, which requires a larger insertion hole than the above-mentioned instrument. . However, the processing of the connecting portion between the shaft body and the elastic wire is made only by allowing the elastic wire to pass through the hole provided in the shaft body, and when the elastic wire is expanded, it is naturally expanded symmetrically. There is an advantage such as easy.

  In addition, when a superelastic alloy or a shape memory alloy is used as the elastic wire, since the rigidity is high in addition to the elasticity and the shape memory effect, the shape change is possible at the same time, even if it is a linear wire, The organ or the like can be lifted reliably, and the above-described expansion and lifting functions can be obtained at a high level.

Furthermore, if the elastic wires are provided in two pairs at different angles such as a cross shape when viewed from above, a more reliable and wider range of lifting is possible.
In addition, when a cutting edge is provided at the tip of the shaft body, it can be directly punctured by the cutting edge and can be inserted into the lifting portion, so that a puncture needle for inserting a lifting device is not required, and one device Thus, it is possible to provide an instrument that does not require other instruments for all operations related to the needle puncture, instrument insertion, lifting, and lifting procedures.

Due to these actions and effects, the present invention has an easy to insert and remove operation of the lifting part into the body cavity such as the stomach, which is the subject of the present invention, the lifting is reliable, and the ease of use having the freedom in the lifting direction is excellent. A lifting device can be provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall configuration diagram of a lifting device showing a first example of an embodiment of the present invention, and shows a natural state (closed state) before spreading.
The lifting device of the present embodiment is formed in a tubular outer cylinder 1, a shaft 2 provided with a tip projecting from the outer cylinder 1 in the inner cavity of the outer cylinder 1, and a long-axis droplet shape. The elastic wire 3 having both end portions connected and fixed to the wire fixing portion 11 at the tip portion of the outer cylinder 1 and the curved tip portion penetrating and held by the wire holding portion 22 of the protruding portion of the shaft body 2; The basic structure is constituted by locking means (41, 42, and 44) for restricting the movement of the cylinder 1 and the shaft body 2.
The outer cylinder 1 is formed of a tubular (pipe-shaped) metal or resin, and both ends of the elastic wire 3 are firmly attached to the tip by welding or bonding, and the outer cylinder 1 and the shaft body 2 are connected to the side. And a sliding groove 41 and a locking groove 42 (two places) which are locking means for restricting the movement are provided.
The shaft body 2 is made of a metal or resin rod-shaped body, and the base side includes a shaft body base 21 that serves as an operation portion. 3, the curved end portion of the outer cylinder 1 and the shaft body 2 are movable and slidable and locked to the shaft body base 21 by the sliding groove 41 and the locking groove 42 described above. A locking projection 44 serving as locking means for restricting the movement is provided.
The elastic wire 3 is formed by bending a superelastic alloy into two at the middle portion and fixing both ends to the wire fixing portion 11 while holding the curved end portion to the wire holding portion 22 of the shaft body 2. doing.
With this configuration, when the outer cylinder 1 is fixed and the shaft body base 21 is pulled, the shaft body 2 slides relatively backward along the sliding groove 41 in the lumen of the outer cylinder 1, and the elastic wire 3. When the elastic wire 3 is expanded in the width direction against elasticity and further pulled, the elastic wire 3 partially reverses from the tip side, and the lifting part of an organ or the like that forms two droplet-type wings that are axisymmetric with respect to the shaft body Is formed. Further, when the shaft body base 21 is pushed in reverse from this state, it is configured to return to the original natural state (closed state) due to the elasticity of the elastic wire 3.

FIG. 2 is an explanatory view showing a locking means for restricting the movement of the outer cylinder and the shaft body of the above-described form, wherein A is a locking portion in a normal state where the elastic wire is closed, and B is an expansion and reversal of the elastic wire The latching | locking part of the state in which the lifting part was formed is shown.
As described above, the locking means of the present example is basically configured by the sliding groove 41 provided on the outer cylinder 1, the locking groove 42, and the locking protrusion 44 provided on the shaft body base 21, and at normal times before use, The locking projection 44 is held by a locking groove 42 on the distal end side of the outer cylinder 1. To expand and reverse the elastic wire 3 from this state, the outer cylinder 1 is gripped and fixed, and the shaft body 2. Is slightly rotated to remove the locking projection 44 from the locking groove 42 on the distal end side. In this state, the shaft body 2 is pulled, and the locking protrusion 44 is slid along the sliding groove 41, and then When it is slightly rotated and engaged with the locking groove 42 on the proximal end side, the movement of the outer cylinder 1 and the shaft body 2 is restricted, and the elastic wire 3 is maintained in an expanded and inverted state. I can leave. Note that the elastic wire 3 is in a natural flat state when the sliding groove 41 and the locking groove 42 are located, and the locking protrusion 44 is at the position of the locking groove 42, and the sliding groove 41 is moving. If the elastic wire 3 is set so as to be biased toward the slightly twisted locking groove 42, there is no fear that the locking is released due to the restoring force of the elastic wire 3 during use. Further, in order to make the locking more reliable, the entrance of the locking groove 42 is formed to have a small diameter, and when the locking projection 44 is inserted, the entrance is slightly expanded. Further, a notch portion 43 that communicates with the sliding groove 41 is provided at the rear end of the sliding groove 41 so that the locking projection 44 can be inserted into the outer cylinder 1 at the time of manufacture.
The locking means for restricting the movement of the outer cylinder 1 and the shaft body 2 is not limited to this means, and any known means can be applied.

Next, the shape change of the elastic wire, that is, the process of forming the lifting portion will be described.
FIG. 3 is a configuration diagram showing a stage in the middle of forming the lifting portion of the above-described form, and FIG. 4 shows a configuration diagram in a state where the lifting portion is formed.
As described above, when the outer cylinder 1 is held and fixed and the shaft body 2 is pulled, the elastic wire 3 is bent in the outward width direction against elasticity and deformed into an expanded wide droplet shape. (FIG. 3) Further, when the shaft body 2 is pulled and the length of the shaft body 2 protruding in the axial direction becomes shorter than the length of the elastic wire 3 in the axial direction, the elastic wire 3 goes through a heart shape and finally. The tip side is inverted, and the shape shown in FIG. 4 forms two droplet-type wings that are axisymmetric with respect to the shaft. In this state, when the engagement protrusion 44 is fitted to the engagement groove 42 on the proximal end side, the movement is restricted, and the shape of the elastic wire 3 is maintained as shown in FIG. It is formed as a lifting portion 31 that abuts.

FIG. 5 is a virtual diagram showing a state in which the elastic wire is crushed when the instrument of the above-described form is inserted into the body cavity.
In order to insert the lifting device of this embodiment into a body cavity through a small incision or the lumen of a mantle tube, the elastic wire 3 forming a long-axis droplet in a natural state can be inserted through the body cavity insertion hole. It is necessary to make the diameter as large as possible. Therefore, when the elastic wire 3 is crushed in a state where the locking protrusion 44 provided on the shaft body base 21 is slightly rotated from the locking groove 42 on the distal end side and removed on the sliding groove 41, the elastic wire 3 Since the bulge in the width direction is converted into the length in the axial direction by the elasticity of 3, the elastic wire 3 can be reduced in diameter so that it can be inserted through the body cavity insertion hole. In the figure, the entire elastic wire is shown in a reduced shape, but in use, it is sufficient that only the portion in contact with the body cavity insertion passage is reduced in diameter, and it does not have a specific shape. .
According to the configuration of the first embodiment described above, each of the approach to the body cavity, the lifting of the tissue, and the removal from the body cavity are performed as described above in comparison with the conventional lifting device. The operability can be greatly improved in steps.

Next, another embodiment will be described.
FIG. 6 is an overall configuration diagram showing a second example of the embodiment of the present invention, and FIG. 7 is an enlarged view (A is a front view, B is a side view) showing the distal end side portion. It shows the previous natural state (closed state).
The lifting device of the present embodiment includes a tubular outer cylinder 1, a shaft body 2 having a distal end protruding from the outer cylinder 1 in the lumen of the outer cylinder 1, and a piercing blade tip provided at the distal end, and an outward (expanded) Formed in a slightly brazed and curved manner in the opening direction), with one end portion fixed to the wire fixing portion 11 at the tip of the outer cylinder 1 and the other end fixed to the wire fixing portion 23 of the protruding portion of the shaft body 2; Basically, two pairs of four elastic wires 3 and locking means (41, 42, and 44) for restricting the movement of the outer cylinder 1 and the shaft body 2 are used.
The gripping part 1 is made of tubular (pipe-like) metal or resin, and two pairs of wire fixing parts 11 provided at axially symmetrical positions are provided at the tip part at an angle of 90 degrees (total of four places). And one end portion of the elastic wire 3 is firmly attached to the wire fixing portion 11 by welding or bonding. Further, the side surface is provided with a sliding groove 41 and two locking grooves 42 (two locations) that serve as locking means for restricting the movement of the outer cylinder 1 and the shaft body 2 and the movement.
The shaft body 2 is made of a metal or resin rod-shaped body, and is formed by providing a shaft body base 21 at the base portion. The tip portion is provided with a blade edge 24 for puncturing human body tissue, below the jaw portion of the blade edge 24. Two pairs of wire fixing portions 23 provided at axially symmetrical positions with a slight gap are provided at a 90 degree angle (total of four locations), and one end portion of the elastic wire 3 is provided in the wire fixing portion 23. A locking means for restricting the movement and movement of the outer cylinder 1 and the shaft body 2, which are slidably and locked to the shaft base 21 by the sliding groove 41 and the locking groove 42 described above. A locking projection 44 is provided.
The elastic wire 3 is made of a super-elastic alloy, and two pairs (a total of four) are formed with an angle of 90 degrees each with two pairs forming an axial symmetry with respect to the shaft body 2 as one pair. The portion is fixedly connected to the wire fixing portion 11 of the outer cylinder 1 and the other end is fixedly connected to the wire fixing portion 23 of the shaft body 2 so as to be in corresponding positions. Further, when the elastic wire 3 is fixed, the elastic wire is formed in a curved shape that is brazed in advance in the expanding direction, and when the elastic wire 3 that forms a pair is expanded, the shaft body 2 is symmetrical to the left and right. In addition, substantially the same plane is formed.
With this configuration, as compared with the first embodiment described above, the cutting edge 24 is provided, and the elastic wires 3 and 2 pairs are provided in a cross shape when viewed from the top surface. No effect is required or a wider range of effects such as lifting can be obtained. In addition, when the elastic wire 3 is set to the same pair as in the first embodiment, in a natural state, there is no bulge at the curved portion of the distal end portion of the elastic wire, so that the insertion portion with a smaller diameter can be obtained. it can.
Note that the state at the time of expansion or insertion into the body cavity is substantially the same as that of the above-described embodiment, and thus the description thereof is omitted.

Next, the usage example using this instrument is demonstrated.
FIG. 8 is a schematic diagram for explaining how to use the instrument of the first embodiment. In laparoscopic local gastrectomy for early gastric cancer, etc., the lesion is lifted and the site is excised. The method of lifting the stomach wall when using this device for the method of raising the lesioned part is shown. (Note that this description only describes how to use the device, not the actual surgical procedure, and does not describe anything other than the steps required for lifting.)
1. First, under an endoscopically inserted endoscope and a laparoscopic observation, an outer tube 51 having an inner needle 52 is used to penetrate the abdominal wall 6 and stomach wall 7 from outside the body and puncture the vicinity of the affected area (FIG. A). Remove the needle and place the mantle inside the stomach.
2. Next, in the lifting device, when the elastic wire 3 is crushed to a small diameter as shown in FIG. 5, the length of the protruding end of the elastic wire 3 is appropriate through the lumen of the outer tube 51. Insert into stomach until it is (Figure B).
3. When the insertion is completed, the outer tube 51 is removed (FIG. C). When the mantle tube 51 is removed, the elastic wire 3 returns to its original shape inside the stomach due to elasticity.
4). Subsequently, when the outer cylinder 1 is held, the shaft body base 21 is slightly rotated to remove the locking projection 44 from the locking groove 42 on the distal end side, and the shaft body 2 is retracted along the sliding groove 41. The elastic wire 3 spreads outward and is further reversed to form a wing-like lifting part 31. Here, when the shaft base 21 is slightly rotated again and the locking protrusion 44 is inserted into the locking groove 42 on the base side and the movement is restricted, the lifting portion is lifted as necessary. Since 31 is in contact with the stomach wall, the peripheral stomach wall in contact with the stomach 31 is lifted as much as necessary. (Figure D)
5). In this state, a part of the suspended stomach wall is excised with an automatic suturing device.
6). When the device is removed from the stomach after the resection is completed, the outer cylinder 1 is held and the shaft base 21 is slightly rotated to remove the locking projection from the locking groove 42 on the base side. By pushing back, the elastic wire 3 returns to its original closed natural state due to elasticity, and can be removed by pulling it out of the body as it is.

FIG. 1 is an overall configuration diagram showing a first embodiment of the present invention (closed state). Explanatory drawing which shows the latching means holding the expansion state of the said embodiment The block diagram which shows the stage in the middle of formation of the lifting part of the said embodiment The block diagram which shows the state in which the lifting part of the said embodiment was formed The virtual block diagram which shows the state in the case of insertion in a body cavity which crushed the elastic wire of the said embodiment Overall configuration diagram showing the second embodiment of the present invention (closed state) The enlarged view which shows the front end side part of the said embodiment Schematic diagram explaining how to use the present invention Configuration diagram showing a conventional T-bar device

Explanation of symbols

1. Outer cylinder 11. Wire fixing part (outer cylinder)
2. Shaft body 21. Shaft base 22. Wire holding part 23. Wire fixing part (shaft)
24. 2. Cutting edge Elastic wire 31. Lifting part (organ contact part)
41. Sliding groove 42. Locking groove 43. Cutout 44. Locking projection 51. Outer tube 52. Inner needle 6. 6. Abdominal wall 8. stomach wall T bar

Claims (6)

A tubular outer tube,
A rod-shaped shaft body that protrudes from the outer cylinder and moves the lumen of the outer cylinder in the axial direction;
A pair of elastic wires that fix each end to the tip of the outer cylinder and the shaft body to form an axial object on the shaft body;
It comprises a locking means for restricting the movement of the outer cylinder and the shaft body,
When the outer cylinder and the shaft body are moved relative to each other, a lifting portion is formed that expands outward from the closed state of the elastic wire, and further partially reverses to engage and hold in the body tissue. A lifting device characterized by that. 2. The lifting device according to claim 1, wherein the elastic wire is formed by applying a brazing that is curved in advance in the expanding direction when the elastic wire is fixed to the outer cylinder and the shaft body. A tubular outer tube,
A rod-shaped shaft body that protrudes from the outer cylinder and moves the lumen of the outer cylinder in the axial direction;
An elastic wire that is curved in the form of a long-axis droplet, both ends are fixed to the outer cylinder, and the curved end is passed through and held at the tip of the shaft;
It comprises a locking means for restricting the movement of the outer cylinder and the shaft body,
When the cylindrical body and the shaft body are moved relative to each other, a lifting part that the elastic wire expands outward from a long-axis droplet shape and further partially reverses and engages and holds the body tissue is provided. A lifting device characterized by being formed. The lifting device according to any one of claims 1 to 3, wherein the elastic wire includes two pairs, and the two pairs are formed with different attachment angles. The lifting device according to claim 1, wherein the elastic wire is made of a superelastic alloy or a shape memory alloy. The lifting device according to any one of claims 1 to 5, wherein a tip of the shaft body is provided with a cutting edge.

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