JP4681920B2 - Indwelling device placed in body cavity - Google Patents

Description

  The present invention relates to an indwelling device that is placed in a body cavity during a surgical operation or the like.

In the surgical operation by laparoscope or laparotomy, there is a scoring method as a treatment for grasping a lesion part generated inside a luminal organ such as the stomach or the large intestine. The inking method is a method that involves injecting ink from the inside of the luminal organ into the living tissue where the lesion has occurred, several days to several weeks before the operation. This is a treatment that makes it easy to identify the position of a lesion from the outside directly or indirectly with the naked eye. Specifically, an endoscope is inserted from the mouth, and ink is injected by inserting a needle into the organ wall located near the lesion from the inside of the luminal organ. The injected ink spreads along the wall, and assists in visually confirming the lesioned part at the time of excision.
At this time, it is necessary to keep in mind that the needle tip does not penetrate through the wall portion and is injected at a depth that allows the position of the tattoo to be visually recognized when the luminal organ is viewed from the outside. If the needle penetrates the wall, not only the lesion site is unclear, but many other organs may be covered with ink so that the operation cannot continue. Also, if the ink can not be injected so that it can be seen outside the stomach or large intestine, the lesion site cannot be identified, which may cause the lesion to be left behind. In short, the problem with this inking method is that it requires a high technique for adjusting the depth of needle insertion so as to ensure the inking.

  In view of this, a method has been proposed that makes it possible to accurately grasp a desired location of a luminal organ without performing high-quality inking in laparoscopic or open surgery. The method is to insert an endoscope into a luminal organ such as the stomach or large intestine before the operation, and to place an indwelling device having a magnetic body inside the luminal organ, This is a procedure for identifying the position of a lesion by detecting the magnetism of the indwelling device from the outside of the organ (see, for example, Patent Documents 1 and 2).

  In addition, an indwelling device including a magnet is arranged in the vicinity of the lesioned part to grip the living tissue, and the indwelling device is pulled from outside by applying a magnetic force to the indwelling device, and the living tissue including the lesioned part is lifted together with the indwelling device A method for separating from surrounding normal tissue has been proposed (see, for example, Patent Document 3).

  In addition, a magnetic material is placed in advance at a predetermined position inside the lumen organ, and a magnetic material with a magnetic flux density variable type forceps brought close to the outside of the lumen organ in the operation, and placed inside the lumen organ. Is attracted to the magnetic forceps together with the living tissue of the luminal organ (see Non-Patent Document 1 below). According to this method, when the magnetic forceps are brought close to the outside of the lumen organ in which the magnetic body is placed, the magnetic body is attracted to the magnetic forceps so that the wall portion of the lumen organ in which the magnetic body is placed rises outward. Transforms into Therefore, by visually recognizing the deformation from the outside of the luminal organ, the position where the magnetic body is placed can be easily grasped accurately in a short time.

In addition to attracting the magnetic material placed inside the lumen organ to the magnetic forceps together with the living tissue of the lumen organ, the magnetic material is adsorbed to the magnetic forceps together with the living tissue of the lumen organ, thereby It is possible to grasp a desired part of an organ accurately and without damaging a living tissue.
WO99 / 02098 pamphlet JP 2002-159508 A JP 2004-105247 A Japanese Society of Surgery, Vol. 105, Special Issue, March 15, 2004 “Abstracts of the 104th Annual Meeting of the Japanese Surgical Society”, p. 307, “Magnetic flux density variable type for lesion capture and intestinal resection under endoscopic surgery” Usefulness of magnetic forceps: Takeshi Ohira, Masami Masako, Hideo Nagai

  In the above-described method for exploring a luminal organ using a magnetic material, the magnetic material is required to have a certain size in order to exert a stronger magnetic force between the magnetic forceps and the magnetic material. However, a large magnetic material is not preferable because it places a burden on the patient when the magnetic material is placed in the body cavity. For example, if a magnetic body is attached to the distal end of the insertion portion of the endoscope and is inserted into the body cavity together with the endoscope, it is necessary to insert and remove the insertion portion of the endoscope many times when using a plurality of magnetic bodies There will be a heavy burden on the patient.

  This invention is made | formed in view of said situation, and it aims at providing the indwelling device which can arrange | position a magnetic body in a body cavity, without putting a burden on a patient.

As a means for solving the above problems, an indwelling device having the following configuration is employed.
That is, the indwelling device of the present invention is an indwelling device to be placed in a body cavity, and a plurality of magnetic bodies having a size that can be inserted into a channel provided in an insertion portion of an endoscope; A clip having a size and fixed to the living tissue by sandwiching the living tissue; a shape that is clearly thinner than the inner diameter of the channel, is pre-shaped into a predetermined shape, and is restored to the predetermined shape even when deformed consists memory alloy, and a connecting member for connecting the clip with the magnetic body; wherein the plurality of magnetic bodies that have been attached strung to the connecting member.

Since the indwelling device of the present invention is sized so that all the members can be inserted into the channel of the endoscope, the indwelling device is inserted into the channel from the proximal end side of the insertion portion, moved in the channel, and the insertion portion It is possible to discharge from the tip side. Therefore, a plurality of indwelling devices can be fed into the body cavity while being inserted into the body cavity without removing and inserting the insertion portion of the endoscope.
In addition, since the inner diameter of the channel is not so large depending on the thickness of the insertion portion or the like, the magnetic material having a size that can be inserted into the channel does not have a strong magnetic force. Since the indwelling device of the present invention is provided with a plurality of magnetic bodies having a size that can be inserted into the channel, a sufficiently strong magnetic force can be obtained. And since these several magnetic bodies are attached to the rosary connection, an indwelling tool becomes easy to pass a channel.
Moreover, in order to make it easy to receive the effect | action of the magnetic force of the magnet for a several magnetic body attracting an indwelling device, a several magnetic body should be arrange | positioned in a predetermined form. Since the indwelling device of the present invention is formed into a predetermined shape in advance and a plurality of magnetic bodies are attached to a connecting member made of a shape memory alloy that is restored to the predetermined shape even when deformed, the indwelling device is inserted into the channel. When it is deformed, it will be restored to its original shape when discharged into the body cavity. Needless to say, the predetermined shape given to the connecting member is a shape in which a plurality of magnetic bodies are easily affected by the magnetic force of the magnet.

In the indwelling device of the present invention, it is preferable that the adjacent magnetic bodies are attached to the connecting member with the north and south poles facing each other.
Adjacent magnetic bodies are attached to the connecting member so that the N pole and the S pole face each other, so that the individual magnetic bodies are lined up so as not to repel each other due to the action of magnetic force. Therefore, the indwelling device can easily pass through the channel.

In the indwelling device of the present invention, the locking member is preferably formed in a loop shape, a net shape, or a film shape. Furthermore, it is preferable that the locking member is fixed to an end portion of the magnetic body or substantially at the center in the longitudinal direction of the magnetic body.
Since the existing clip has a structure in which the biological tissue is sandwiched by a plurality of claws, when the locking member is in a loop shape, if the biological tissue is sandwiched after passing the claws through the string body, the indwelling device becomes a living body. Fixed to the tissue. In addition, when the locking member has a mesh shape or a membrane shape, the indwelling device is fixed to the biological tissue when the biological tissue is sandwiched between the mesh or the membrane with the nail. Therefore, the indwelling device can be fixed to the living tissue using the existing clip.

  According to the present invention, the magnetic body can be placed in the body cavity without burdening the patient.

A first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the indwelling device 1 of the present embodiment includes a magnet (magnetic body) 10, a clip 11, and a wire (connecting member) 12 that connects the magnet 10 and the clip 11. Both the clip 11 and the wire 12 are made of metal. The magnet 10 is formed in a columnar shape, and the diameter of the circular cross section is smaller than the inner diameter of the channel provided in the insertion portion of the endoscope, and the magnet 10 has a size that can be inserted into the channel. The clip 11 is connected to the base end of the two claws 11b through the inside of the tube body 11a, the tube body 11a formed in a cylindrical shape, the two claws 11b protruding from the distal end of the tube body 11a. And a shaft 11c. The outer diameter of the tube 11a is smaller than the inner diameter of the channel of the endoscope, and is the size that can be inserted into the channel in the same manner as the magnet 10. The two claws 11b are connected after their base ends intersect (this portion is referred to as α-shaped portion 11d), and is actually a single member. The shaft 11c is connected to the base ends of the two claws 11b connected to each other, that is, the α-shaped portion 11d. The wire 12 is clearly thinner than the inner diameter of the endoscope channel, and one end is fixed to the magnet 10 and the other end is firmly connected to the clip 11. Each member constituting the indwelling device 1 is coated with silicon or titanium in order to eliminate the influence on the living body.

  The two claws 11b are open at the end protruding from the tube 11a. However, when the shaft 11c is pulled out from the tube 11a using a special instrument, the α-shaped portion 11d is moved into the tube 11a. The two claws 11b are greatly opened. When the shaft 11c is further pulled out, the two claws 11b are drawn into the tube 11a, and the tips of the two claws 11b approach each other. In order to fix the biological tissue to the clip 11, the two claws 11b are brought close to the biological tissue, the biological tissue is arranged between the claws 11b, and the tips of the two claws 11b are brought closer. As a result, the living tissue is sandwiched between the two claws 11b, and as a result, the clip is fixed to the living tissue.

A method of placing the indwelling device 1 configured as described above in the stomach of a patient using an endoscope will be described.
First, as shown in FIG. 2, the indwelling device 1 is inserted into the sheath 5 together with the instrument 6 for operating the two claws 11 b of the clip 11. At this time, the three members constituting the indwelling device 1 are arranged in order of the magnet 10, the wire 12, and the clip 11 from the distal end of the sheath 5. Next, as shown in FIG. 3, the sheath 5 into which the indwelling device 1 is inserted is inserted into the channel 8 of the insertion portion 7 of the endoscope, and then the sheath 5 is operated to be pushed into the channel 8. Is moved to the tip of the insertion portion 7.

  Next, the insertion portion 7 of the endoscope is inserted into the body from the patient's mouth. When the distal end of the insertion portion reaches the stomach, the clip operating device 6 is operated to be pushed into the channel 8. As a result, the indwelling device 1 is pushed out of the sheath 5 and discharged into the stomach in the order of the magnet 10, the wire 12, and the clip 11.

  Next, after visually recognizing the lesion using an endoscope, the clip 11 is fixed to the inner wall of the stomach located in the vicinity thereof (refer to the above for the operation procedure for fixing the clip 11). At this time, the positional relationship between the lesioned part and the place where the indwelling tool 1, that is, the clip 11 is fixed, is accurately grasped so that the lesioned part can be accurately excised at the time of surgery.

  When indwelling a plurality of indwelling devices 1 in the stomach, the insertion portion 7 of the endoscope is not extracted, and the sheath 5 and the instrument 6 for clip operation are extracted from the channel 8. And the new indwelling tool 1 is inserted in the channel 8 from the base end side of the insertion part 7, and it indwells in the inside of a stomach in the procedure similar to the above.

  According to the present invention, a plurality of indwelling devices 1 can be fed into a body cavity while being inserted into the body cavity without inserting and removing the insertion section 7 of the endoscope. Thereby, a patient's physical burden can be reduced.

  In the present embodiment, the indwelling device 1 is inserted into the channel in the order of the magnet 10, the wire 12, and the clip 11, but the order of the members inserted into the channel is not limited to the above order. For example, the clip 11 may be inserted first, and then the wire 12 and the magnet 10 may be inserted. In this case, the means for moving the indwelling tool 1 may use other tools instead of the clip operating tool 6.

Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the component already demonstrated in said embodiment, and description is abbreviate | omitted.
As shown in FIG. 4, the indwelling device 2 of this embodiment includes a magnetic body 10 and a loop-shaped wire (locking member) 22 connected to the magnet 10. Both ends of the wire 22 are bent in a loop shape and fixed to one end face of the magnet 10. Even if two wires 22 are bundled, they are clearly thinner than the inner diameter of the endoscope channel. The magnet 10 and the wire 22 are coated with silicon or titanium in order to eliminate the influence on the living body. Unlike the indwelling device 1 described in the first embodiment, the indwelling device 2 is separate from the clip 11.

A method of placing the indwelling device 2 configured as described above in the stomach of a patient using an endoscope will be described.
First, the indwelling device 2 is inserted into the sheath 5 together with a clip operation tool. At this time, the two members constituting the indwelling device 2 are arranged in the order of the magnet 10 and the trap 22 from the distal end of the sheath 5. Next, the sheath 5 into which the indwelling device 2 has been inserted is inserted into the channel 8 of the insertion portion 7 of the endoscope, and then the sheath 5 is pushed into the channel 8 to operate the indwelling device 2 up to the distal end of the insertion portion 7. Move.

  Next, the insertion portion of the endoscope is inserted into the body from the patient's mouth. When the distal end of the insertion portion reaches the stomach, the clip operation tool is further pushed into the channel. As a result, the indwelling device 2 is pushed out of the sheath 5 and discharged into the stomach in the order of the magnet 10, the wire 22, and the clip 11.

  Next, after visually recognizing the lesion using an endoscope, the clip 11 is fixed to the inner wall of the stomach located in the vicinity thereof. At this time, as shown in FIG. 5, one of the two claws 11b of the clip 11 is passed through the looped wire 22, and the biological tissue B is sandwiched between the two claws 11b. Thereby, the indwelling tool 2 is latched by the clip 11 fixed to the inner wall of the stomach.

  When indwelling a plurality of indwelling devices 2 in the stomach, the insertion portion 7 of the endoscope is not extracted, but the sheath 5 and the instrument 6 for clip operation are extracted. And the new indwelling tool 2 is inserted in the channel 8 from the base end side of the insertion part 7, and it indwells inside the stomach in the same procedure as the above.

  According to the present invention, a plurality of indwelling devices 2 can be fed into the body cavity while being inserted into the body cavity without removing and inserting the insertion portion 7 of the endoscope. Thereby, a patient's physical burden can be reduced.

The modification of the indwelling tool 2 of this embodiment is shown in FIGS.
In the indwelling device 2 a shown in FIG. 6, looped wires 22 are respectively fixed to both end surfaces of the magnet 10. When indwelling the indwelling device 2a in the stomach, the same procedure as described above may be followed. However, if the indwelling device 2a needs to be firmly fixed to the inner wall of the stomach, the clip 11 is passed through one wire 22. In addition to fixing, the other wire 22 may be fixed through another clip 11.

  In the indwelling device 2b shown in FIG. 7, a transparent vinyl film 23 is fixed to one end face of the magnet 10 instead of the wire 22. When the indwelling device 2b is placed inside the stomach, one or both of the two claws 11b of the clip 11 are pressed against the living tissue from above the membrane 23, and then the living tissue is applied to the two nails 11b. Hold it. Thereby, the indwelling tool 2 is latched by the clip 11 fixed to the inner wall of the stomach. Note that a net having the same shape may be used instead of the film 23. The film 23 may be fixed to both end faces of the magnet 10 or may be fixed to substantially the center in the longitudinal direction of the magnet 10 as shown in FIG.

  In the present embodiment, the indwelling device 2 is inserted into the channel in the order of the magnet 10 and the wire 22, but may be inserted in the reverse order. In addition, the means for moving the indwelling device 2 through the channel may use other devices instead of the clip operation device. Further, a plurality of indwelling devices 2 may be fixed with one clip 11.

Next, a third embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the component already demonstrated in said embodiment, and description is abbreviate | omitted.
As shown in FIG. 9, the indwelling device 3 of this embodiment includes a plurality of magnets 30, a clip 11, and a wire 32 that connects the plurality of magnets 30 and the clip 11. The plurality of magnets 30 are all spherical, and a through hole 30a passing through the center is formed. The wires 32 are pierced through the through holes 30 a of the respective magnets 30, and both ends thereof are firmly bound to the clip 11. Thus, the plurality of magnets 30 are attached in a daisy chain to the wire 32 having both ends tied to the clip 11. Further, the plurality of magnets 30 attached to the wire 32 are arranged so that adjacent ones face the N pole and the S pole, and are attracted to each other.

A method of placing the indwelling device 3 configured as described above in the stomach of a patient using an endoscope will be described.
First, as shown in FIG. 10, the indwelling tool 3 is inserted into the sheath 5 together with the clip operating tool 6. At this time, the plurality of magnets 30 are inserted into the sheath 5 one by one in the order of attachment to the wires 32. Next, the sheath 5 into which the indwelling device 3 is inserted is inserted into the channel 8 of the insertion portion 7 of the endoscope, and then the sheath 5 is pushed into the channel 8 to operate the indwelling device 3 to the distal end of the insertion portion 7. Move.

  Next, the insertion portion 7 of the endoscope is inserted into the body from the patient's mouth. When the distal end of the insertion portion 7 reaches the stomach, the clip operating instrument 6 is operated to be pushed into the channel 8. As a result, the indwelling device 3 is pushed out of the sheath 5 and discharged into the stomach in the order of the plurality of magnets 30 attached to the wire 32 and the clip 11. As shown in FIG. 11, the indwelling device 3 discharged into the stomach forms a mass by adsorbing a plurality of magnets 30 by the action of each other's magnetic force.

  Next, after visually recognizing the lesion using an endoscope, the clip 11 is fixed to the inner wall of the stomach located in the vicinity thereof. When a plurality of indwelling devices 3 are indwelled in the stomach, the insertion portion 7 of the endoscope is not extracted, and the sheath 5 and the instrument 6 for clip operation are extracted. And the new indwelling tool 3 is inserted in the channel 8 from the base end side of the insertion part 7, and it indwells in the inside of a stomach in the procedure similar to the above.

  According to the present invention, a plurality of indwelling devices 3 can be fed into a body cavity while being inserted into the body cavity without removing and inserting the insertion portion 7 of the endoscope. Thereby, a patient's physical burden can be reduced. In addition, since a plurality of magnets 30 are provided in one indwelling device 3, it is possible to generate a very strong magnetic force even if only one indwelling device 3 is placed.

The modification of the indwelling tool 3 of this embodiment is shown in FIGS.
The indwelling tool 3a shown in FIG. 11 is a superelastic wire that is shaped into a circle and is restored to the original circle even when deformed. When the indwelling device 3a is inserted into the endoscope channel, the indwelling device 3a is elastically deformed to be deformed into a circular shape. However, when the indwelling device 3a is discharged into the stomach, it is elastically deformed. Restore to a circle. Therefore, the plurality of magnets 30 are arranged in a ring shape. In addition, you may employ | adopt a shape memory alloy for the wire 32a. In this case, it is preferable that the state temperature of the shape memory alloy is set to a temperature higher than normal temperature and lower than body temperature. Thereby, the indwelling device 3a discharged | emitted inside the stomach restore | restores to the original shape with body temperature. When indwelling the indwelling device 3a by utilizing such a shape restoring function of a super elastic wire or a shape memory alloy, as shown in FIG. 13, a plurality of magnets are formed around the lesioned part inside the stomach. If it fixes so that it may surround by 30, it will become possible to grasp | ascertain a lesion part more correctly.
In the indwelling tool 3b shown in FIG. 14, the tip 33 for preventing the magnet 30 from coming off is fixed to one end of the wire 32b, and only the other end of the wire 32b is fixed to the clip 11 using a heat shrinkable tube or the like. Yes. As described above, a highly elastic wire or shape memory alloy is used for the wire 32b, and when the indwelling device 3b is placed, the lesioned part formed in the stomach is surrounded by a plurality of magnets 30. It may be fixed.

  In this embodiment, the indwelling device 3 is inserted into the channel in the order of the plurality of magnets 30 (the wires 32 to which the plurality of magnets 30 are attached are also inserted at the same time as the magnets 30), and the clip 11; The order of the members is not limited to the above order. For example, the clip 11 may be inserted first, and then the wire 12 and the magnet 10 may be inserted. In this case, the means for moving the indwelling tool 1 may use other tools instead of the clip operating tool 6.

Next, a fourth embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the component already demonstrated in said embodiment, and description is abbreviate | omitted.
As shown in FIG. 15, the indwelling device 4 of this embodiment includes a plurality of magnets 40, a clip 11, and a wire 42 that connects the plurality of magnets 40 and the clip 11. Each magnet 40 is formed with a through hole 40 a in the direction of the arc of the fan, and the wire 42 is pierced through the through hole 40 a of each magnet 40. Each magnet 40 is formed in a fan shape obtained by dividing a circle into eight equal parts, and one of the arc directions of the fan is an N pole and the other is an S pole. Further, the plurality of magnets 40 attached to the wire 42 are arranged so that adjacent magnets face the N pole and the S pole, and adsorb each other to form a ring shape. The reason why the plurality of magnets 40 are formed in a ring shape is to make it easier to receive the action of magnetic force from the outside of the stomach.

A method of placing the indwelling device 4 configured as described above in the stomach of a patient using an endoscope will be described.
First, the indwelling device 4 is inserted into the sheath 5 together with a clip operation tool. At this time, the plurality of magnets 40 are inserted into the sheath 5 one by one in the order attached to the wire 42. Next, the sheath 5 into which the indwelling device 4 is inserted is inserted into the channel of the insertion portion of the endoscope, and then the sheath 5 is operated to be pushed into the channel to move the indwelling device 4 to the distal end of the insertion portion.

  Next, the insertion portion of the endoscope is inserted into the body from the patient's mouth. When the distal end of the insertion portion reaches the stomach, the clip operation tool is further pushed into the channel. As a result, the indwelling device 4 is pushed out of the sheath 5 and discharged into the stomach in the order of the plurality of magnets 40 and the clip 11. The indwelling device 4 discharged into the stomach forms a ring shape by adsorbing a plurality of magnets 40 by the action of each other's magnetic force.

  Next, after visually recognizing the lesion using an endoscope, the clip 11 is fixed to the inner wall of the stomach located in the vicinity thereof. When a plurality of indwelling devices 4 are to be indwelled in the stomach, the insertion portion of the endoscope is not extracted, but the sheath 5 and the instrument for clip operation are extracted. Then, a new indwelling tool 4 is inserted into the channel from the proximal end side of the insertion portion, and is placed in the stomach in the same procedure as described above.

  According to the present invention, a plurality of indwelling devices 4 can be fed into a body cavity while being inserted into the body cavity without having to insert and remove the insertion portion of the endoscope. Thereby, a patient's physical burden can be reduced. In addition, since a plurality of magnets 40 are provided in one indwelling device 4, it is possible to generate a very strong magnetic force even if only one indwelling device 4 is placed. Further, the indwelling device 4 discharged into the stomach has a plurality of magnets 40 that are attracted to each other by the action of each other's magnetic force and form a ring shape. Therefore, when the magnetic forceps are brought close to the outside of the stomach, A very strong magnetic force acts between the forceps and the plurality of magnets 40, and the biological tissue is pulled and attracted more reliably by the magnetic forceps.

  In the present embodiment, the plurality of magnetic forces 40 are formed in a ring shape by the adsorption of the respective magnets 40. However, the wire 42 is formed into a circular shape and is restored to the original circular shape even when deformed. An elastic wire or a shape memory alloy may be employed. Thereby, the restoring action of the wire 42 may be combined with the attracting action of each magnet 40 so that the plurality of magnets 40 have a ring shape.

In each of the above embodiments, the process of placing the indwelling device inside the stomach has been described. However, the place where the indwelling device can be placed includes any luminal organ other than the stomach. For example, an indwelling device can be placed inside the large intestine. In that case, the endoscope is inserted from the anus.
In each embodiment, a magnet having its own magnetic force is used as a magnetic body to be placed in the body. However, if the magnetic forceps emits a strong magnetic force, the magnet is placed on the magnetic body to be placed in the body. It is not necessary to use a metal material, and it is sufficient to use a metal material that is attracted to the magnet when a magnetic force acts.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to said embodiment. Additions, omissions, substitutions, and other modifications can be made without departing from the spirit of the present invention. The present invention is not limited by the above description, but only by the scope of the appended claims.

It is a perspective view which shows 1st Embodiment of the indwelling tool of this invention. It is a perspective view which shows the state which inserted the indwelling tool of 1st Embodiment in the sheath. It is a perspective view which shows the state which inserted the sheath which inserted the indwelling tool of 1st Embodiment in the channel of the insertion part of an endoscope. It is a perspective view which shows 2nd Embodiment of the indwelling tool of this invention. It is a perspective view which shows the state which fixed the indwelling tool of 2nd Embodiment to the biological tissue using the endoscope. It is a perspective view which shows the modification of the indwelling tool of 2nd Embodiment. It is a perspective view which shows the modification of the indwelling tool of 2nd Embodiment. It is a perspective view which shows the modification of the indwelling tool of 2nd Embodiment. It is a perspective view which shows 3rd Embodiment of the indwelling tool of this invention. It is a perspective view which shows the state which inserted the indwelling tool of 3rd Embodiment in the sheath. It is a perspective view which shows the state which fixed the indwelling tool of 3rd Embodiment to the biological tissue using the endoscope. It is a perspective view which shows the modification of the indwelling tool of 3rd Embodiment. It is a perspective view which shows the modification of the indwelling tool of 3rd Embodiment. It is a perspective view which shows the modification of the indwelling tool of 3rd Embodiment. It is a perspective view which shows 4th Embodiment of the indwelling tool of this invention.

Explanation of symbols

1: Indwelling device, 10: Magnet (magnetic body), 11: Clip, 12: Wire (connection member), 2: Indwelling device, 22: Wire (locking member), 2a: Indwelling device, 22: Wire, 2b: Indwelling device, 23: membrane, 3: indwelling device, 30: magnet, 32: wire, 3a: indwelling device, 32a: wire, 3b: indwelling device, 32b: wire, 4: indwelling device, 40: magnet, 42: wire

Claims (2)

An indwelling device placed in a body cavity,
A plurality of magnetic bodies of a size that can be inserted into a channel provided in an insertion portion of the endoscope;
A clip that can be inserted into the channel and is fixed to the living tissue by sandwiching the living tissue;
A connecting member for connecting the magnetic body and the clip, which is apparently thinner than the inner diameter of the channel, made of a shape memory alloy that is preliminarily formed into a predetermined shape and is restored to the predetermined shape even when deformed. Prepared,
The indwelling device in which the plurality of magnetic bodies are attached to the connecting member in a daisy chain.   The indwelling device according to claim 1, wherein the adjacent magnetic bodies are attached to the connecting member with the north and south poles facing each other.

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