JPH0626579B2 - An instrument for inserting into a bendable human body organ having an elastic restoring function and a bending apparatus for an instrument to be inserted into a human body organ - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for inserting into a human body organ that is elastic and has a restoring function and a bending apparatus for the apparatus to be inserted into the human body organ.

[0002]

2. Description of the Related Art At present, for example, treatment of an aortic aneurysm is currently performed by transplanting an artificial blood vessel. That is, the blood vessel portion invaded by the aortic aneurysm is cut and removed by an operation, and an artificial blood vessel is connected to the cut and removed portion by an operation such as suturing for transplantation.

[0003]

By the way, in treating an aortic aneurysm, the method of implanting an artificial tube by surgery as described above has a problem of high risk. In particular, emergency surgery for rupture reduces the survival rate, and
Dissecting aneurysms have the problem that surgery is difficult and the mortality rate is high.

The present invention has been made in view of the above problems of the prior art, and its object is to fold a device for inserting a human body into a catheter without performing an operation. A human body that can be inserted and carried to a target position such as a diseased part of a blood vessel or other narrowed part of a human body organ, and released at the target position so that the instrument to be inserted into the human body organ can be reliably restored and transplanted. The first object is to provide a device to be inserted into the organ of the human body, and the second object is to make it easy to fold the device to be inserted into the human body organ and to introduce the device into the catheter. A third object is to provide a device capable of easily and accurately folding an instrument to be inserted into an organ.

[0005]

A device for inserting into a bendable human body organ having an elastic restoring function according to the present invention has a ring-shaped wire rod portion 10 having bendable elasticity at both ends.
And a plurality of connecting annular wire rod portions 11 each having a substantially circular shape and being bendable and elastic without applying an external force are bridged between the ring-shaped wire rod portions 10 on both sides and the connecting annular wire rod portions 11 are formed into a ring-shaped wire rod portion. 10, the intermediate ring-shaped wire rod portion 12 is arranged between the both ring-shaped wire rod portions 10, the intermediate ring-shaped wire rod portion 12 is arranged outside the connecting annular wire rod portion 11, and the intermediate ring-shaped wire rod portion 12 connects the annular ring wire rods. It is characterized in that the portion 11 is held in a state of being elastically deformed into a substantially elliptical shape.

Further, a hooking portion 13 for pulling a cord through a string at a position where the circumferential direction of the ring-shaped wire rod portion 10 is divided into a plurality of portions.
May be provided. A ring-shaped wire rod portion 10 having foldable elasticity is provided at both ends of a tubular artificial tube 7 formed of a flexible cloth or sheet, and the foldable elastic connection is formed into a substantially circular shape without external force being applied. A plurality of annular wire rod portions 11 are bridged between the ring-shaped wire rod portions 10 on both sides, and the connecting annular wire rod portions 11 are attached to the ring-shaped wire rod portions 10, and an intermediate ring-shaped wire rod portion 12 is arranged between both ring-shaped wire rod portions 10. The intermediate ring-shaped wire rod portion 12 is disposed outside the connecting annular wire rod portion 11, and the intermediate ring-shaped wire rod portion 12 holds the connecting annular wire rod portion 11 elastically deformed into a substantially elliptical shape. It is a thing.

Further, the device for inserting into a bendable human body organ having an elastic restoring function is a ring-shaped wire rod portion having a bendable elasticity at both ends of a tubular artificial tube 7 formed of a flexible cloth or sheet. 10 may be provided, and a hooking portion 13 for pulling the cord through the string may be provided at a position where the circumferential direction of the ring-shaped wire rod portion 10 is divided into a plurality of portions.

Furthermore, in the instrument to be inserted into the human body organ of the present invention, the rear end portion becomes the large-diameter inlet 18a for inserting the instrument from the front end portion, and the diameter is gradually reduced so that the front end portion is located behind the catheter 8. It is characterized in that it is configured by a trumpet-shaped tube 18 having a trumpet shape, which is a connecting portion 19 having a diameter smaller than that of a tubular instrument that can be fitted into an end portion.

[0009]

According to the present invention, the ring-shaped wire rod portion 10 having the bendable elasticity is provided at both ends, and a plurality of the connecting annular wire rod portions 11 having the bendable elasticity are formed into a substantially circular shape without any external force. An intermediate ring-shaped wire rod portion 12 is provided by arranging the connecting annular wire rod portion 11 on the ring-shaped wire rod portion 10 while attaching the connecting annular wire rod portion 11 between the ring-shaped wire rod portions 10 on both sides. Is disposed outside the connecting annular wire rod portion 11 to provide the intermediate ring-shaped wire rod portion 12
The ring-shaped wire rod portion 10 and the intermediate ring that have bendable elasticity when folding and inserting an instrument to be inserted into a human organ having a configuration in which the connecting annular wire rod portion 11 is elastically deformed into a substantially elliptical shape into a catheter Wire part 1
2. The connecting annular wire portion 11 is bent to fold the artificial tube 7 into the catheter 8 and the device is released at the target site of the human body organ. The ring-shaped wire portion 10, the intermediate ring-shaped wire portion 12, the connected annular wire material It is restored by the elastic restoring force of the portion 11 and pressed against the inner wall of the human body for construction.

Then, the ring-shaped wire rod portion 10, the intermediate ring-shaped wire rod portion 12, and the connecting ring-shaped wire rod portion 11 which have bendable elasticity at both ends of the artificial pipe 7 are bent, and the artificial pipe 7 is folded and inserted into the catheter 8. For example, in the case where the artificial tube 7 is released at the target site (affected area 26) of the blood vessel 9, the ring-shaped wire portion 10, the intermediate ring-shaped wire portion 12,
The artificial tube 7 is restored to a tubular shape by the elastic restoring force of the connecting annular wire rod portion 11 and is pressed against the inner wall of the blood vessel 9 for construction. At this time, both ends of the artificial tube 7 are ring-shaped wire rod portions 10
Is pressed against the inner wall of the blood vessel 9, and the intermediate portion of the artificial tube 7 prevents the blood vessel 9 from being closed by external pressure after transplantation.
Further, the shape of the entire artificial tube 7 when it is restored by the elastic restoring force of the connecting annular wire portion 11 is measured, and it can be structurally strong.

Similarly, when the human body organ 9a is inserted into the narrowed portion 26a and released, the narrowed portion 26a of the human body organ 9a can be expanded by the artificial tube 7. Also,
In the case where the hook portion 13 for pulling through the string is provided at the position where the circumferential direction of the ring-shaped wire portion 10 is divided into a plurality of parts, directly while pulling the string through the hook portion 13,
Alternatively, the catheter 8 can be folded by a folding device.
It can be placed inside and transferred inside the catheter 8.

In folding the instrument to be inserted into the human body, the artificial tube 7 is connected to the large-diameter inlet 18 of the trumpet-shaped tube 18.
By inserting from a and moving to the connecting portion 19 side, the ring-shaped wire rod portion 10 is bent in a predetermined state, and the instrument to be inserted into the organ of the human body is bent in a predetermined state as a whole.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. As an instrument to be inserted into a human body organ, there is, for example, an artificial blood vessel, an artificial tube or a frame for expanding a narrowed portion of the human body organ. Hereinafter, an example of the artificial blood vessel 7 will be described as an instrument to be inserted into a human body organ.

As shown in FIG. 1, the artificial blood vessel 7 is made of cloth, film or the like into a flexible tubular shape, and the artificial blood vessel 7 is held by the frame 32 so as to retain the tubular shape. is there. The frame 32 is as shown in FIG. 2, and includes a ring-shaped wire rod portion 10 that is attached to both ends of the artificial blood vessel 7 and fixed by sewing, bonding, or the like, and a plurality of bridge-shaped wire rod portions 10 installed between the ring-shaped wire rod portions 10. It has a three-dimensional structure including a connecting annular wire rod portion 11 and an intermediate ring-shaped wire rod portion 12 arranged between the ring-shaped wire rod portions 10. Here, the connecting annular wire rod portion 11 uses an elastic wire rod that is substantially circular when no external force is applied.
2 are arranged and fixed between the ring-shaped wire portions 10 on both sides as shown in FIG. 2, and similarly, a plurality of connected annular wire members 11 are arranged and fixed in the circumferential direction of the ring-shaped wire portion 10, and further, An intermediate ring-shaped wire rod portion 12 having elasticity is arranged between the ring-shaped wire rod portions 10 on both sides. The intermediate ring-shaped wire rod portion 12 is partially fixed to the artificial blood vessel 7, and the intermediate ring-shaped wire rod portion 12 is positioned outside the plurality of connecting annular wire rod portions 11 provided between the ring-shaped wire rod portions 10 on both sides. By pressing the connecting annular wire portion 11 that is essentially circular in shape, it is forcibly deformed into an elliptical shape as shown in FIGS. 1 and 2, and as a result, the elasticity of the elliptical shape returning to a substantially circular shape. The restoring force is accumulated, and this elastic force serves as a spring force that restores the artificial blood vessel 7 to its original tubular shape as a whole. Here, the fact that the connecting annular wire rod portion 11 has a substantially circular shape in the state where no external force is applied is not limited to being strictly a circular shape, and includes a shape close to an ellipse in advance. In this case, the ring-shaped wire rod portion 1 at both ends is deformed into a flatter elliptical shape by applying an external force to the substantially circular (elliptical) connected annular wire rod portion 11.
It spans between zero. In addition, in the embodiment of FIGS. 1 and 2, a part of the intermediate ring-shaped wire rod portion 12 (the middle one of the three intermediate ring-shaped wire rods 12 in FIGS. 1 and 2) is located inside the connecting annular wire rod portion 11. Connected annular wire rod part 1
1 holds the artificial blood vessel 7 so as not to bite into it. Here, the connecting annular wire rod portion 11 and the intermediate ring-shaped wire rod portion 12 are not fixed to each other, but this is because the connecting annular wire rod portion 11 and the intermediate ring-shaped wire rod portion 12 do not affect each other when they are bent. This is so that it can be bent smoothly. Of course, part of the intermediate ring-shaped wire rod portion 1
It is also possible to partially connect 2 to the connecting annular wire part 11. Further, the connecting annular wire rod portions 11 may be connected to each other at one or a plurality of locations. In addition, among the plurality of intermediate ring-shaped wire rod portions 12, the intermediate ring-shaped wire rod portion 12 located outside the connecting annular wire rod portion 11 has the connecting annular wire rod portion 11 as described above.
Of the intermediate ring-shaped wire rod portion 12 is elastically deformed into a substantially elliptical shape.
Is applied continuously to help restore the intermediate ring-shaped wire rod portion 12 to a circular shape when the intermediate ring-shaped wire rod portion 12 is restored after being bent. In the embodiment, the connecting annular wire rod portion 11 is not directly fixed to the artificial blood vessel 7, but a part of the connecting annular wire rod portion 11 may be fixed to the artificial blood vessel 7 if necessary. The ring-shaped wire rod portion 1
0, the connecting annular wire rod portion 11, and the intermediate ring-shaped wire rod portion 12 are all made of a flexible material having an excellent elastic restoring force, for example, a titanium nickel alloy wire or the like, but of course, are not limited thereto. Absent. Although it is difficult to weld titanium-nickel alloy wire or the like, ring-shaped wire rods can be joined together with a string or the like, which facilitates assembly. Also,
The diameter of the ring-shaped wire rod portion 10, the connecting annular wire rod portion 11, and the intermediate ring-shaped wire rod portion 12 is approximately 20 m corresponding to the diameter of the artificial blood vessel 7.
It is set to about m to 30 mm. Further, the length of the artificial blood vessel 7 is appropriately selected according to the length to be transplanted in the affected area. A ring-shaped hooking portion 13 is formed of a thread or the like at two opposite positions on the opening edge of one end of the artificial blood vessel 7 having the ring-shaped wire rod portions 10 attached to both ends thereof. Note that, if necessary, hooking portions 13a may be similarly provided with a thread or the like at two opposite positions on the opening edge of the other end of the artificial blood vessel 7. In this case, the position of the hook portion 13a is the hook portion 1
3 is displaced by 90 ° in the circumferential direction of the artificial blood vessel 7.

The artificial blood vessel 7 having the above-mentioned construction is carried out by using a device for introducing a medium into a human body tube as shown in FIG. This device comprises a metal-made deformable tube 2,
It is composed of a side window portion 1 provided near the front end portion of the tube 2, a string 4 having one end fixed near the side window portion 1 of the tube 2, and a wire 3 movably inserted into the tube 2. is there.

In order to transfer the artificial blood vessel 7 of the present invention to the target position (affected part 26) of the blood vessel 9 which is an example of the organ of the human body by using the device for introducing the medium into the human body having the above-mentioned constitution, This is what you do. Then, the artificial blood vessel 7 having the above configuration is fitted onto the tube 2 as shown in FIG. 4, and the string 4 is passed through the hooking portion 13 located at the front end of the artificial blood vessel 7 as shown in FIG. Further, the artificial blood vessel 7 is held on the wire 3 inserted into the tube 2 by winding the wire 3 half-winding or once or plural times around the side window portion 1 of the tube 2. In this case, the tip of the wire 3 is temporarily taken out from the side window part 1, the string 4 is wound, and then the tip of the wire 3 is again inserted into the tube 2 from the side window part 1 to easily wire the side window part 1. The cord 4 can be wound around the cord 3. Further, in this case, if the cord 4 is further provided with an enlarged portion 14 such as a knot as shown in FIG. 6, the cord 4 is sandwiched between the edge of the side window part 1 and the wire 3, and the cord 4 is more accurate. 4 can be held. Further, a plurality of strings 4 may be provided as shown in FIG.
In this way, the tube 2 is inserted into the catheter 8 to reach the target position (affected part 26) of the blood vessel 9 while holding the artificial blood vessel 7 as the medium by the wire 3 in this case. Is directly pushed from the rear end of the catheter 8, and while pulling the artificial blood vessel 7 with the string 4, at the same time deforming and folding the ring-shaped wire rod portion 10 at the front end of the artificial blood vessel 7 and inserting it into the catheter 8.
Alternatively, the artificial blood vessel 7 is preliminarily folded using the artificial blood vessel bending device shown in FIG. 7, and then the folded artificial blood vessel 7 is inserted into the catheter 8.

An embodiment in which the artificial blood vessel 7 is previously folded using the artificial blood vessel bending device shown in FIG. 7 and inserted into the catheter 8 will be described below. 1 in FIG.
Reference numeral 8 denotes a trumpet-shaped tube, the rear end of which is a large-diameter inlet 18a for inserting the tubular artificial blood vessel 7 from the front end.
The connecting portion 19 is made of a metal tube having a circular cross section whose diameter is gradually reduced from the side of the large-diameter inlet 18a, and the front end portion is smaller in diameter than the artificial blood vessel 7 that can be fitted into the rear end portion of the catheter 8. It is a trumpet-shaped tube 18 having a trumpet shape. The connecting portion 19 at the front end can be detachably fitted and connected to the rear end of the catheter 8. In FIG. 7, reference numeral 15 is a check valve provided at the rear end portion of the catheter 8, and the check valve 15 is formed of an elastic film, and a hole 17 is bored in the elastic film.
Normally, this hole 17 is closed. And
When the connecting portion 19 is fitted in the rear end portion of the catheter 8, the connecting portion 19 made of a metal tube pushes the hole 17 of the elastic film and is inserted. In the illustrated embodiment, the trumpet-shaped tube 18 has an elliptical cross section because the hooking portion 13 is located at the bisector of the ring-shaped wire rod portion 10. The cross section has a triangular shape when positioned at the equidistant points, and has a quadrangular cross section when the hooking portions 13 are positioned at four equal points on the ring-shaped wire rod portion 10. Then, in the embodiment shown in FIG. 8, the front pulling string 20 is passed through the hooking portions 13 formed at the two opposite positions of the opening edge of the front end portion of the artificial blood vessel 7, and the other end portion of the artificial blood vessel 7 is The rear pulling cord 21 is passed through the hooking portions 13a provided at two opposite sides of the opening edge, and the other end of the rear pulling cord 21 is attached to the bar-shaped handle 22.
In this state, the balloon catheter 23 is fitted on the tube 2 as shown in FIG.
The distal end of the balloon 3 is located at a position approximately 2 to 3 cm away from the rear end of the artificial blood vessel 7 fitted to the tube 2, and in this state, the fastener 24 of the balloon catheter 23 is tightened to integrate the balloon catheter 23 with the tube 2. Set it to move.

Next, with the trumpet-shaped tube 18 removed from the catheter 8, the pulling cord 20 is inserted from the rear part of the trumpet-shaped tube 18 as shown in FIGS. The tube 2 is pulled out and inserted into the trumpet-shaped tube 18 to a certain extent. In this state, the handle 22 as shown in FIG.
The artificial blood vessel 7 is introduced into the trumpet-shaped tube 18 through the large-diameter inlet 18a of the trumpet-shaped tube 18 while pulling the front-pulling string 20 forward while applying a pulling force directed backward. Here, the ring-shaped wire rod portion 10 at the front end is divided into four equal parts in the circumferential direction, and the virtual point (or its vicinity) obtained by dividing the four equal parts is the first for convenience.
41 ₁ , the second point 42 ₁ , the third point 43 ₁ , the fourth point 44 ₁ , and the ring-shaped wire rod portion 10 at the rear end in the circumferential direction, the first point 41 ₂ , the second point 42 ₂ , third point 4
3 _2, 4 equal portions at four points of the fourth point 44 _2, corresponding to the mounting portion of the first point 41 ₁ and the third point 43 ₁ and hooking the respective portions 13 of the end wire ring 10 of the front end If you let
The line connecting the first point 41 ₁ and the third point 43 ₁ of the ring-shaped wire portion 10 at the front end is in the minor axis direction of the large-diameter inlet 18a having a substantially elliptical shape as shown in FIG. 7B. The line that is located and connects the second point 42 ₂ and the fourth point 44 ₂ is the inlet 1
8a is set so as to be positioned in the major axis direction (that is, as shown in FIG. 10), and when the front pulling cord 20 is pulled in this state, at the two opposing points of the ring-shaped wire rod portion 10 at the front end of the artificial blood vessel 7. There is a first point 41 ₁ and a third point 43 ₁ (where
As described above, the first point 41 of the ring-shaped wire rod portion 10 at the front end
₁ and the third point 43 ₁ correspond to the attachment portions of the hooking portion 13) and are pulled by the front pulling cord 20,
The ring-shaped wire rod portion 10 at the front end is flatly crushed so that the first point 41 ₁ and the third point 43 ₁ which are the mounting portions of the facing hooking portions 13 come close to each other, and the inside of the trumpet-shaped tube 18 is Since the point 41 ₁ and the third point 43 ₁ are drawn first, the flattened ring-shaped wire rod portion 10 at the front end further has the second point 42 ₁ and the fourth point 42 ₁ facing each other of the ring-shaped wire rod portion 10 at the front end. The point 44 ₁ is located rearward, and the second point 42 ₁ and the fourth point 44 ₁ are bent so as to come close to each other and are inserted into the trumpet-shaped tube 18. That is, the ring-shaped wire rod portion 10 at the front end is deformed from the state of A in FIG. 17 to the state of B, and further to the state of C, and the _first point 41 ₁ and the third point which are the hooking portion 13 and the third portion. Point 43 ₁ is the top of the forward-facing chevron, and the second point 42 ₁ and the fourth point 44 ₁ are the forward-facing valley-shaped bottom, and the front end ring-shaped wire rod portion 10 is formed.
Is wavy as a whole. At this time, when the front pulling cord 20 is further pulled forward, the ring-shaped wire rod portion 10 at the rear end is provided with a hooking portion 13a provided at a position opposed to the rear pulling cord 21 (this portion is a ring at the rear end). (Corresponding to the second point 42 ₂ and the fourth point 44 ₂ of the linear wire portion 10), the ring-shaped wire portion 10 at the rear end has the second point 42 ₂ and the _second point 42 ₂ facing each other. Since the front end of the artificial blood vessel 7 is pulled forward by the front pulling cord 20 at the same time as it is pulled rearward at the attachment portion of the hooking portion 13a corresponding to the point 44 ₂ of 4, the ring-shaped wire rod portion 10 at the rear end is First point 41 ₂
And the third point 43 ₂ are first drawn into the trumpet-shaped tube 18 and are flatly crushed so that the first point 41 ₂ and the third point 43 ₂ come close to each other and the second point 42 facing each other. ₂ and the fourth point 44 ₂ are located rearward, and the second point 42 ₂ and the fourth point 44 ₂ are bent so as to come close to each other and inserted into the trumpet-shaped tube 18. That is, the ring-shaped wire rod portion 10 at the rear end is deformed from the state of A in FIG. 18 to the state of B, and is further deformed to the state of C, and the second point 42 ₂ which is the hooking portion 13 a and the second point 42 ₂ . The point 44 _{2 of} 4 is the top of the rearwardly facing chevron, and the first point 41 ₂ and the third point 43 ₂ are the bottom of the rearwardly facing trough.
0 is wavy as a whole. 19A and C
Shows the relationship between the deformed members in the respective bending processes of the ring-shaped wire rod portion 10 and the connecting annular wire rod portion 11 at the front and rear ends of the artificial blood vessel 7 that is bent as described above (in this figure, for convenience). , A drawing in which the intermediate ring 12 is omitted is shown). That is, it is bent in the order of A → C in FIG. When bent in this manner, the connecting annular wire member portion 11 becomes substantially linear as shown in FIG. 19B and is not loosened. Figure 2
0 shows a bent state of the artificial blood vessel 7 bent as described above. In this way, the artificial blood vessel 7 is introduced into the connecting tube 19 while being inserted from the large-diameter inlet 18a of the trumpet-shaped tube 18 and being folded, and the above-mentioned pretensioning cord 20
The rear pulling cord 21 and the rear pulling cord 21 are pulled out from the hooking portion 13 and the hooking portion 13a by removing the knots and pulling one end.

On the other hand, the catheter 8 is punctured in advance, for example, into the hip artery at the base of the foot, and the tip of the catheter 8 is sent to the affected part 26 of the blood vessel 9 such as an aortic aneurysm. In this case, the distal end portion of the catheter 8 is inserted so as to be positioned slightly ahead of the affected area which is the target site. Next, the metal cylinder 19 is inserted into the hole 17 of the elastic film which is the check valve 16 provided at the rear end of the catheter 8, and in this state, the tube 2 into which the wire 3 is inserted is inserted into the catheter 8.
The tip of the tube 2 into which the wire 3 is inserted is positioned at the tip of the catheter 8 as shown in FIG. 12, and the artificial blood vessel 7 held by the wire 3 is positioned at the target position of the tip of the tube 2. Here, when the tube 2 into which the wire 3 is inserted is left as it is and pulled out as shown in FIGS. 13 to 14, the artificial blood vessel 7 folded and inserted into the catheter 8 is inserted from the front end portion thereof. Figure 13 while opening
→ It is released into the blood vessel 9 in the order of Fig. 14A → Fig. 14B.
The released artificial blood vessel 7 is restored into a tubular shape by the elastic restoring force of the ring-shaped wire rod portion 10 and the connecting annular wire rod portion 11, and the blood vessel 9
It is pressed against the inner wall. If the discharge position is bad, the tube 2 holding the artificial blood vessel 7 is moved back and forth to adjust the position of the artificial blood vessel 7. Next, the fastening of the fastening tool 24 is released to release the connection between the balloon catheter 23 and the tube 2, the balloon catheter 8 is pushed along the tube 2 into the artificial blood vessel 7, and the tip thereof is moved as shown in FIG. Proceed until reaching the tip of the artificial blood vessel 7. Here, the balloon catheter 23 is inflated as shown by the alternate long and short dash line in FIG. 15 to completely expand the artificial blood vessel 7 and fix it to the inner wall of the blood vessel 9. When the fixation of the artificial blood vessel 7 is completed, the balloon catheter 23 is deflated and withdrawn. And artificial blood vessel 7
After confirming that the wire 3 is fixed to the inner wall of the blood vessel 9, when the wire 3 is pulled to the tube 2 as shown in FIG. 16, when the tip of the wire 3 retracts from the side window 1 of the tube 2, the side window 1 part Then, the string 4 wound around the wire 3 comes off the wire 3. In this state, pull the tube 2 and the string 4
Is disengaged from the hook portion 13, and the tube 2 is pulled out while leaving only the artificial blood vessel 7 at a predetermined position of the blood vessel 9.

Although the embodiment using the balloon catheter 23 is shown in the above embodiment, the balloon catheter 23 is not used, and the artificial blood vessel 7 is pressed against the inner wall of the blood vessel 9 only by the elastic restoring force of the artificial blood vessel 7. May be. Next, another embodiment of the artificial blood vessel 7 of the present invention will be described with reference to FIG.
In this embodiment, both end portions of the connecting annular wire rod portion 11 project outward in the axial direction of the tubular artificial blood vessel 7 more than the ring-shaped wire rod portions 10 on the front and rear sides. With this configuration, the fixing portion 3 between the ring-shaped wire rod portion 10 and the connecting annular wire rod portion 11
There are 0 and 31 in two places, and as a result, the ring-shaped wire rod portion 10
When the ring-shaped wire rod portion 10 is folded and then restored, an elastic restoring force is applied to the ring-shaped wire rod portion 10 so that the connecting annular wire rod portion 11 fixed at two places returns to a circular shape, and the ring-shaped wire rod portion 10 is restored to the circular shape. It will help you when you do. The connecting annular wire portion 11 projects from both ends of the artificial blood vessel 7 so that the blood vessel 9 and the artificial blood vessel 7 can be smoothly connected to the inner wall without forming a step. Here, as shown in FIGS. 22A and 22B, it may be fixed to the ring-shaped wire rod portion 10 at the intersection of the connecting annular wire rod portions 11. By the way, FIG. 22B shows the connecting annular wire rod portion 1
The tip ring-shaped wire rod portions 10a may be further fixed to the tips of the portions that project outward in the axial direction from the ring-shaped wire rod portions 10 at the front and rear ends of 1. In this case, the connecting annular wire rod portion 1
The tip 1 has a ring-shaped wire portion 10a for preventing the tip from scratching the inner wall of the blood vessel 9. Further, the tip of the connecting annular wire portion 11 is widened and is in close contact with the inner wall of the blood vessel 9 to prevent the artificial blood vessel 7 from flowing downstream.

Further, a protrusion 35 may be provided on the outer surface of the artificial blood vessel 7 as shown in FIG. In this case, the protrusion 3
As shown in FIG. 23, various shapes such as a substantially V-shaped projection, a wart-shaped projection, and a projection with a sharp tip are conceivable as the shape of 5 and are formed by various materials such as wire, hard thread, and rubber. I am doing it. The protrusions 35 are formed on the ring-shaped wire rod portion 10, the connecting annular wire rod portion 11, the outer surface of the cloth forming the main body of the artificial blood vessel 7, and the like. Further, the projection 35 is provided so as to be vertically projected on the outer surface of the artificial blood vessel 7, or is provided so as to be inclined so that the tip thereof is directed rearward. When the projection 35 is projected on the outer surface of the artificial blood vessel 7 as described above, the projection 35 bites into the inner wall of the blood vessel 9 or becomes a frictional resistance to prevent slippage, and the artificial blood vessel 7 is flowed downstream by blood flow. Is prevented.

In each of the above embodiments, the ring-shaped wire rod portion 10, the connecting annular wire rod portion 11, and the intermediate ring-shaped wire rod portion 12 are provided outside the artificial blood vessel 7, but these ring-shaped wire rod portions 10 are shown. The connecting annular wire portion 11 and the intermediate ring-shaped wire portion 12 may be arranged inside the artificial blood vessel 7. Note that FIG. 25 shows another example of a device for introducing a medium into a human body. In this embodiment, a flexible guide tube 5 is continuously provided at the tip of the tube 2. Here, the guide tube 5 is a coil formed of a flexible metal or a synthetic resin such as polyethylene, or a tube formed of a flexible synthetic resin or rubber. In this way, the flexible guide cylinder 5 is continuously provided at the tip of the tube 2 to prevent the tip of the tube 2 from damaging the inner wall of the blood vessel 9.

Further, FIG. 26 shows still another example of the apparatus for introducing the medium into the human body. In this embodiment, a short guide tube 5 is continuously provided at the front end of the short tube 2 and a long rear tube 6 is continuously provided at the rear end of the tube 2. Each of the rear cylinders 6 is composed of a coil formed of a flexible metal or a synthetic resin such as polyethylene, or a cylinder formed of a flexible synthetic resin or rubber. In this way, the flexible short guide tube 5 is connected to the front end of the tube 2 and the tube 2
By connecting the flexible rear cylinder 6 to the rear end of the blood vessel 9,
The guide tube 5 and the rear tube 6 that are flexible with respect to the bending of the blood vessel 9 can be easily moved smoothly along the insertion into
Further, the flexibility of the guide cylinder 5 and the rear cylinder 6 prevents the inner wall of the blood vessel 9 from being damaged.

In the above-mentioned embodiment, the artificial blood vessel 7 is broken.
Before folding and inserting into the catheter 8,
Each of the ring-shaped wire rod portions 10 has a first point 4 in the circumferential direction.
1₁, The second point 42₁, The third point 43₁, The fourth point 44
₁And divide the ring-shaped wire rod part 10 at the rear end into four equal parts.
First point 41 in each circumferential direction₂, The second point 42
₂, The third point 43₂, The fourth point 44₂4 points are divided into 4 equal parts
The example of bending and inserting is shown in FIG. 27 and FIG.
The ring-shaped wire rod portions 10 at the front and rear ends in the circumferential direction.
Divide this into 8 equal virtual points (or their vicinity)
For convenience, the ring-shaped wire portion 10 at the front end is
Divide this into 8 equal virtual points (or their vicinity)
For convenience, the first point 51₁, The second point 52₁, The third point 5
Three₁, The fourth point 54₁, Fifth point 55₁, Sixth point 56
₁, Seventh point 57₁, Eighth point 58₁, Again the rear end phosphorus
A first point 51 is formed in the circumferential direction of the wire-shaped wire portion 10.₂, Second
Point 52₂, The third point 53₂, The fourth point 54₂The fifth
Point 55₂, Sixth point 56₂, Seventh point 57₂, The eighth point
58₂8 points are divided into 8 equal parts, and the front end of the ring-shaped wire rod portion 10
First point 51₁And the third point 53₁And the fifth point 55₁And the
Point 7 of 7₁Attaching part of hook 13
When it is applied to the first end of the ring-shaped wire rod portion 10 at the front end,
Point 51₁And the third point 53₁And the fifth point 55₁And the seventh point
57₁As shown in Figure 27, and are square (or circular) in cross section.
Located near the center of each side of the large-diameter inlet 18a
And pull the front tension string 20 in this state.
And the first point of the ring-shaped wire rod portion 10 at the front end of the artificial blood vessel 7.
51₁And the third point 53₁And the fifth point 55₁And the seventh point 5
7₁(Here, as described above, the front end ring-shaped wire rod portion 10
First point of 51₁And the third point 53₁And the fifth point 55₁When
Seventh point 57₁And are the attachment parts of the hooks 13, respectively.
(Corresponding to the minute) is pulled by the front tension string 20, so the front end
The ring-shaped wire rod portion 10 is attached with the facing hook portion 13
The first point 51 which is the injured part₁And the third point 53₁And the fifth
Point 55₁And the seventh point 57₁And are approaching each other and artificial blood
When crushed so that it is located in the axial front of the pipe 7,
The first point 51 in the trumpet tube 18₁And the third point 5
Three₁And the fifth point 55₁And the seventh point 57 ₁And are drawn first
The crushed front end ring-shaped wire rod portion 10 is
Second point 52 of ring-shaped wire rod portion 10₁, The fourth point 5
Four₁, Sixth point 56₁, Eighth point 58₁And are behind
And the second point 52₁And the fourth point 54₁And the sixth point 56
₁And the eighth point 58₁It can't be bent so that
These are inserted into the trumpet-shaped tube 18. Tsuma
The ring-shaped wire rod portion 10 at the front end is the hook portion 13
There is a first point 51₁And the third point 53₁And the fifth point 55₁
And the seventh point 57₁Is the peak of the positive Yamagata, and the second
Point 52₁And the fourth point 54₁And the sixth point 56₁And the eighth point
58₁And are the bottom of the valley that faces forward, and the front end is ring-shaped.
The wire rod portion 10 has a wavy shape as a whole. this
When pulling the front tension string 20 further forward,
The ring-shaped wire rod portion 10 is positioned so as to face the rear tension cord 21.
Part of the hook 13a provided on the stand (this part is the rear end
Second point 52 of the ring-shaped wire rod portion 10₂, The fourth point 54₂,
Sixth point 56₂, Eighth point 58₂Corresponding to)
Since it is pulled, the ring-shaped wire rod portion 10 at the rear end faces each other.
Second point 52₂And the fourth point 54₂And the sixth point 56₂When
Eighth point 58₂Attachment part of the hook 13a corresponding to
The rear end of the artificial blood vessel 7 is pulled backward at the same time.
Since it is pulled forward by the tension string 20, a ring-shaped line at the rear end
The material part 10 has a first point 51.₂And the third point 53₂And the fifth point
55₂And the seventh point 57₂First pulled into the trumpet tube 18
The first point 51 ₂And the third point 53₂And the fifth point 55₂
And the seventh point 57₂And are crushed so that
Second point 52 to face₂And the fourth point 54₂And are behind
And the second point 52₂And the fourth point 54₂And the sixth point 56
₂And the eighth point 58₂It can't be bent so that
These are inserted into the trumpet-shaped tube 18. Tsuma
The ring-shaped wire rod portion 10 at the rear end is the hook portion 13a
The second point 52 which is₂And the fourth point 54₂And the sixth point 56
₂And the eighth point 58₂Is the peak of Yamagata facing backwards, and the first
Point 51₂And the third point 53₂And the fifth point 55₂And the seventh
Point 57₂And become a valley-shaped bottom facing backwards,
The rugged wire rod portion 10 has a wavy shape as a whole. Figure
Numeral 28 indicates a state of being bent in this embodiment.
A schematic diagram is shown.

FIG. 29 shows the ring-shaped wire rod portions 10 at the front and rear ends.
This virtual point is divided into 6 equal parts in the circumferential direction.
(Or its vicinity) is a ring-shaped wire portion 10 at the front end for convenience.
Is divided into six equal parts in the circumferential direction, and the virtual points are divided into six equal parts.
(Or its vicinity) is the first point 61 for convenience.₁, The second point
62₁, The third point 63₁, The fourth point 64₁, The fifth point 6
5₁, Sixth point 66₁Also, the ring-shaped wire portion 10 at the rear end
The first point 61 in the circumferential direction₂, The second point 62₂, First
Point 3 of 3₂, The fourth point 64₂, The fifth point 65₂, Sixth
Point 66₂The ring-shaped wire rod part 1 at the front end
0 first point 61 ₁And the third point 63₁And the fifth point 65₁
And correspond to the mounting parts of the hooks 13, respectively.
In this case, the first point 61 of the ring-shaped wire rod portion 10 at the front end₁And the
Point 3 of 3 ₁And the fifth point 65₁And as shown in FIG.
The large-diameter inlet 18a with a square (or circular) cross section
Set so that they are located at the center of each side, and in this state
When pulling the string 20 for front pulling, a ring shape of the front end of the artificial blood vessel 7
First point 61 of wire rod portion 10₁And the third point 63₁And the fifth
Point 65₁(Here, as described above, the front end of the ring-shaped wire
First point of ten 61₁And the third point 63₁And the fifth point 65
₁And correspond to the mounting parts of the hooks 13, respectively.
Ring) at the front end,
The wire rod portion 10 is a mounting portion of the hooking portion 13 facing each other.
First point 61₁And the third point 63₁And the fifth point 65₁When
Are close to each other and are located in front of the artificial blood vessel 7 in the axial direction.
Is crushed and the inside of the trumpet-shaped tube 18
Point 1 of 61 ₁And the third point 63₁And the fifth point 65₁And first
The ring-shaped wire rod portion 10 at the front end that was crushed by the
To the second point 62 of the ring-shaped wire rod portion 10 at the front end.₁, The fourth
Point 64₁, Sixth point 66₁And are located behind and the second
Point 62₁And the fourth point 64₁And the sixth point 66₁And get closer
Insert it into the trumpet-shaped tube 18 while being bent like
It goes. That is, the ring-shaped wire rod portion 10 at the front end is
The first point 61, which is the hooking portion 13 part₁And the third point 6
Three₁And the fifth point 65₁And becomes the peak of the positive Yamagata,
Point 2 of 2₁And the fourth point 64₁And the sixth point 66₁And before
It becomes the bottom of the facing valley, and the ring-shaped wire part 10 at the front end
It is wavy as a whole. At this time,
When pulling the tension string 20 further forward, the ring-shaped wire rod portion at the rear end
10 is a pulling cord provided at a position opposite to the pulling cord 21.
Hanging portion 13a portion (this portion is the ring-shaped wire rod portion 1 at the rear end
Second point of 0 62₂, The fourth point 64₂, Sixth point 66₂
(Corresponding to), so the ring at the rear end
The wire-shaped wire portion 10 has a second point 62 facing each other.₂And the fourth point 64
₂And the sixth point 66₂Attaching the hook 13a corresponding to
The rear end of the artificial blood vessel 7 is pulled forward by
Since it is pulled forward by the string 20 for tensioning, the ring at the rear end
The wire rod portion 10 has a first point 61.₂And the third point 63₂And the fifth
Point 65₂Is first pulled into the trumpet-shaped tube 18 and the first point
61₂And the third point 63₂And the fifth point 65₂And will approach
A second point 62 which is crushed and is opposed to₂And the fourth
Point 64₂And the sixth point 66₂And are located behind and the second
Point 62 ₂And the fourth point 64₂And the sixth point 66₂And get closer
Insert it into the trumpet-shaped tube 18 while being bent like
It goes. That is, the ring-shaped wire rod portion 10 at the rear end is
The second point 62 which is the hook portion 13a portion₂And the fourth point
64₂And the sixth point 66₂And become the peak of Yamagata facing backwards,
First point 61₂And the third point 63₂And the fifth point 65 ₂And
It becomes a valley-shaped bottom in the rearward direction, and the ring-shaped wire part 1 at the rear end
0 is wavy as a whole. In addition, each of the above
In the embodiment, the ring-shaped wire rod portions 10 at the front and rear ends are arranged in the circumferential direction.
For convenience, it was divided into 4 equal parts, 6 equal parts, or 8 equal parts
An example is shown, but it is divided into 10 equal parts or other even points.
Divide and bend based on this division point
It is also possible.

In the above embodiment, the connecting annular wire rod portion 1
Although an example of the circular shape is shown as 1 when the external force is not applied, it may be an elliptical shape when the external force is not applied. In each of the above-described embodiments, the artificial blood vessel 7 is described as an instrument to be inserted into the human body organ, but the artificial blood vessel 7 having the same structure as the artificial blood vessel 7 is used to expand the narrowed portion 26a of the human body organ 9a. Can be used as That is, similar to the artificial blood vessel 7, the artificial tube 7 is inserted into the narrowed portion 26a of the human canal 9a as shown in FIG. 30, and the artificial tube 7 is released at the position shown in FIG. Due to the elastic restoring force of the artificial tube 7 having the same structure as the artificial blood vessel 7 described above, the narrowed portion 2 of the human body vessel 9a.
The portion 6a will be expanded. The artificial tube 7 used to expand the narrowed portion 26a of the human body organ 9a is shown in FIG.
It is not limited to what is shown in FIG. 31, but FIG.
It is needless to say that A, B, the one shown in FIG. 23, or the other one having the same structure as the artificial blood vessel 7 of the present invention can be used.

Further, in FIG. 32, as a device for expanding the narrowed portion 26a of the human body organ 9a, the frame 32 in which the tubular cloth or sheet in the artificial blood vessel 7 is omitted.
An example using only one is shown. That is, only the frame 32 is processed in the same manner as described above, and the narrowed portion 2 of the human body organ 9a is
It can be inserted into the portion 6a and released at the narrowed portion 26a as shown in FIG. 32, and the narrowed portion 26a of the human body organ 9a can be spread by the elastic restoring force of the frame 32. As the frame 32 used here, not only the frame having the structure shown in FIG. 2 but also the artificial blood vessel 7 with the frame 32 shown in FIGS. A structure having only the remaining frame 32 from which the part is removed can be appropriately used.

[0028]

As described above, according to the present invention, the ring-shaped wire rod portion having the elastic property capable of being bent is provided at both ends thereof, and the elastic member has a substantially circular shape capable of being bent without an external force. Intermediate ring-shaped wire rods are formed by bridging a plurality of connected annular wire rods between ring-shaped wire rods on both sides and attaching the connected annular wire rods to the ring-shaped wire rods and arranging the intermediate ring-shaped wire rods between the ring-shaped wire rods. Part is placed outside the connecting annular wire part, and the connecting annular wire part is inserted into the human body organ with a structure in which the connecting annular wire part is elastically deformed into a substantially elliptical shape by the intermediate ring-shaped wire part. At this time, the ring-shaped wire rod portion, the intermediate ring-shaped wire rod portion, and the connecting annular wire rod portion that have bendable elasticity are bent, and the artificial tube is folded and placed in the catheter, and the device is placed at the target site of the human body organ. Releasing, end wire ring, the intermediate end wire ring, in which are restored by the elastic restoring force of the connecting annular wire section may be applied is pressed against the inner wall of the body organ.

In addition, a ring-shaped wire rod portion having elastic elasticity that can be bent is provided at both ends of a cylindrical artificial tube formed of a flexible cloth or sheet, and the elastic wire has a substantially circular shape when no external force is applied. A plurality of connecting annular wire rod portions having the above are bridged between the ring-shaped wire rod portions on both sides, and the connecting annular wire rod portions are attached to the ring-shaped wire rod portions, and an intermediate ring-shaped wire rod portion is arranged between both ring-shaped wire rod portions to form an intermediate ring. The linear wire rod portion is arranged outside the connecting annular wire rod portion, and the intermediate ring wire rod portion holds the elastically deformed state of the connecting wire rod portion into a substantially elliptical shape. An artificial tube having a ring-shaped wire portion can be folded and placed in a catheter to be transferred to a target site such as a stenosis of a blood vessel or other organs of the human body. When the artificial tube is released with, the artificial tube is restored to a tubular shape by the elastic restoring force of the ring-shaped wire part, the connecting annular wire part, and the intermediate ring-shaped wire part, and is pressed against the inner wall of the blood vessel or the constricted part of the human body organ. There is an advantage that it can be carried out without surgery and can be carried to the target position of the affected part of the blood vessel and released at the target position to restore and implant the artificial tube or expand the narrowed part of the human body organ. . Moreover, both ends of the artificial tube are pressed against the inner wall of the blood vessel or the inner wall of the narrowed part of the human body organ by the ring-shaped wire part, and the middle part of the artificial tube is closed by the external pressure after transplantation or the narrowed part of the human body organ is blocked. It is possible to prevent blockage, and the shape of the entire artificial tube can be maintained when it is restored by the elastic restoring force of the connecting annular wire portion, and it can be structurally strong. .

In addition, a ring-shaped wire rod portion having elasticity that can be bent is provided at both ends of a cylindrical artificial tube formed of a flexible cloth or sheet, and a string is passed through the ring wire rod portion at a position divided into a plurality of circumferential directions. In the case where a hooking portion for pulling is provided, it is possible to transfer the inside of the catheter by pulling it through a string through the hooking portion directly or by folding it through a folding device and putting it in the catheter. This has the advantage that the work of folding it and introducing it into the catheter can be simplified.

A device for bending a tubular artificial tube formed of a flexible cloth or sheet having ring-shaped wire portions having bendable elasticity at both ends, and having a rear end portion having a tubular shape It has a trumpet shape that serves as a large-diameter inlet for inserting the tube from the front end and has a connection part with a diameter that is gradually reduced and the front end is smaller than the artificial tube that can be fitted into the rear end of the catheter. Since it is configured by the trumpet-shaped tube, there is an advantage that the ring-shaped wire rod portion can be easily and accurately bent into a predetermined state by the trumpet-shaped tube, and the artificial tube as a whole can be bent into a predetermined shape. .

[Brief description of drawings]

FIG. 1 is a perspective view of an artificial tube of the present invention.

FIG. 2 is a perspective view of a frame used in the above.

FIG. 3 is a perspective view of an embodiment of an apparatus for introducing a medium into a human body according to the present invention.

FIG. 4 is a perspective view showing a state in which the artificial tube of the above is fitted on a tube.

FIG. 5 is a perspective view showing a state in which a string is passed through the hook portion of the artificial tube and the wire is wound around the wire.

FIG. 6 is a perspective view showing a state in which the above-mentioned cord is completely wound around a wire.

FIG. 7 is a drawing showing the trumpet-shaped tube of the same, where A is a perspective view;
B is a sectional view taken along line XX of A, and C is a sectional view taken along line YY of A.

FIG. 8 is a perspective view showing a state in which a front tensioning cord and a rear tensioning cord are passed through the front and rear hooking portions of the same.

FIG. 9 is a perspective view showing a state before the artificial tube is inserted into the trumpet-shaped tube of the above.

FIG. 10 is a partially omitted perspective view of a state in which the balloon catheter is fitted into the tube before the artificial tube is inserted into the trumpet-shaped tube.

FIG. 11 is a perspective view of a state immediately before inserting the artificial tube into the trumpet-shaped tube of the same.

FIG. 12 is a cross-sectional view showing a state where a tube is inserted into the catheter inserted into the blood vessel of the above.

FIG. 13 is a cross-sectional view showing a state in which the catheter has started to be pulled while leaving the tube of the above.

FIG. 14 is an explanatory view showing a state in which the catheter is pulled, which is the same as in FIG.
Is a sectional view in a partially pulled state, and B is a sectional view in a completely pulled state.

FIG. 15 is a cross-sectional view showing a state in which the balloon catheter of the same is moved into the artificial tube.

FIG. 16 is an enlarged perspective view showing a state in which the wire is pulled from the tube and the winding of the string is released from the wire.

FIG. 17 is an explanatory view showing the order of bending the previous ring-shaped wire rod portion of the above.

FIG. 18 is an explanatory view showing the order of bending the ring-shaped wire rod portion after the above.

FIG. 19 is an explanatory view showing the order of bending the front and rear ring-shaped wire rod portions and the connecting annular wire rod portion, where A is before bending and B is after bending.

FIG. 20 is a perspective view showing a state in which the artificial tube of the above is folded.

FIG. 21 is a perspective view of another embodiment of the present invention.

22 is a view showing still another embodiment of the present invention,
B is a perspective view of each different embodiment.

FIG. 23 is a perspective view of still another embodiment of the present invention.

FIG. 24 is a perspective view of another embodiment of the apparatus for introducing the medium into the human body used in the present invention.

FIG. 25 is a perspective view of still another embodiment of the same.

FIG. 26 is a perspective view of still another embodiment of the same.

FIG. 27 is an explanatory view showing another example of bending the artificial tube of the present invention.

FIG. 28 is a schematic perspective view of the same bending state.

FIG. 29 is a perspective view showing still another example of bending the artificial tube of the present invention.

FIG. 30 is a perspective view showing a state in which the artificial tube of the present invention is inserted into a stenosis.

FIG. 31 is a perspective view showing a state in which a narrowed portion is expanded by the artificial tube of the above.

FIG. 32 is a perspective view showing a state where the narrowed portion is expanded by the above frame.

[Explanation of symbols]

 7 Artificial tube 8 Catheter 10 Ring-shaped wire rod portion 11 Connection annular wire rod portion 12 Intermediate ring-shaped wire rod portion 13 Hooking portion 18 Trumpet-shaped tube

Claims (5)

[Claims] 1. A ring-shaped wire rod having flexible elastic ring-shaped wire portions at both ends, and a plurality of ring-shaped wire rod portions having substantially circular bendable elasticity in a state where no external force is applied. Attach the connecting annular wire rod portion to the ring-shaped wire rod portion while straddling it between the parts, place the intermediate ring-shaped wire rod portion between both ring-shaped wire rod portions, and arrange the intermediate ring-shaped wire rod portion outside the connected annular wire rod portion. An instrument for inserting into a bendable human body organ having an elastic restoring function, characterized in that a state in which a connecting annular wire portion is elastically deformed into a substantially elliptical shape is held by an intermediate ring-shaped wire portion. 2. A foldable human body having an elastic restoring function according to claim 1, wherein a hooking portion for pulling a string through is provided at a position where a circumferential direction of the ring-shaped wire portion is divided into a plurality of portions. A device to be inserted into an organ. 3. A bendable elastic member having a substantially circular shape in which a ring-shaped wire rod member having a bendable elasticity is provided at both ends of a cylindrical artificial tube formed of a flexible cloth or sheet, and which has a substantially circular shape without an external force applied thereto. A plurality of connecting annular wire rod portions having the above are bridged between the ring-shaped wire rod portions on both sides, and the connecting annular wire rod portions are attached to the ring-shaped wire rod portions, and an intermediate ring-shaped wire rod portion is arranged between both ring-shaped wire rod portions to form an intermediate ring. -Shaped wire member is arranged outside the connecting annular wire member, and the intermediate ring-shaped wire member holds the elastically deformed connecting annular wire member in a substantially elliptical shape. An instrument to be inserted into a human body organ. 4. A ring-shaped wire rod portion having elasticity that can be bent is provided at both ends of a tubular artificial tube formed of a flexible cloth or sheet, and the ring-shaped wire rod portion is divided into a plurality of positions in the circumferential direction. An instrument for insertion into a bendable human body organ having an elastic restoring function, characterized in that a hooking portion for pulling through a string is provided. 5. A device for bending an instrument to be inserted into an organ of a human body according to any one of claims 1, 2, 3 and 4, wherein a rear end portion of the instrument is a front end portion. It is a trumpet-shaped tube with a trumpet-like shape that becomes a large-diameter inlet for insertion from the inside, and the diameter is gradually reduced so that the front end can be fitted into the rear end of the catheter. A bending device for a device to be inserted into an organ of a human body, characterized by being configured.