JPH0889518A - Device for connecting hollow organs - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a hollow organ connecting device which can easily connect hollow organs in a living body, has high corrosion resistance, and can be used for a long period of time. [Structure] The hollow organ connecting device 1 includes a first tubular member 2
And a second tubular member 3. At least the first tubular member is formed of a so-called platinum magnet, and includes two openings 2b and 2c, an end portion that can be fixed to a living body organ, and a connecting portion that connects the second tubular member. The second tubular member is
It has at least one connecting portion 3a attached to the connecting portion 2a of the first tubular member 2 by a magnetic attraction force.

Description

Detailed Description of the Invention

[0001]

The present invention relates to blood vessels, digestive tracts, organs,
The present invention relates to a device for connecting hollow organs in the body such as the bile duct, ureter and oviduct. Specifically, the present invention relates to a hollow organ treatment instrument used to connect excised hollow organs after partially excising the hollow organs to remove a tumor or the like formed in the hollow organs.

[0002]

2. Description of the Related Art Conventionally, partial excision of the intestinal tract has been performed in order to remove cancer or the like that has occurred in the intestine. Partial resection of the intestine is performed by an abdominal incision. Surgical invasion by abdominal incision places a great burden on the patient. Recently, a thoracoscopic surgery that reduces surgical invasion of a patient is performed. In laparoscopic surgery, the abdominal wall is partially incised, and a flexible endoscope, a rigid endoscope, etc., is inserted into the body cavity through this incision, and the body cavity is photographed with a small camera installed on the body cavity. It is done while observing the monitor screen. A few trocar cannulas were punctured in the abdominal wall, and a long surgical instrument equipped with surgical instrument functions such as forceps, scissors, and an electric scalpel was inserted into the body cavity through this cannula. Then, cholecystectomy is performed.
The laparoscopic surgery has advantages over surgical laparotomy, such as less surgical invasion and less postoperative pain, and faster recovery.
Currently, only at limited medical institutions and limited doctors,
Although it is conducted in Japan, it has become quite popular in the United States.

Although the application of this surgical method is currently limited to cholecystectomy and the like, expansion of the range is being studied, and for example, application to intestinal anastomosis is considered. However, it is extremely difficult to perform an intestinal anastomosis with a surgical instrument under a body cavity endoscope as compared with the removal of the gallbladder, and the operation time is long and the burden on the patient is large.

[0004] Conventionally, a bypass operation using a graft such as an artificial blood vessel or an autologous vein has been performed in order to treat an occlusion or a stenosis occurring in a coronary artery. Since this bypass operation requires a long operation time, it is necessary to temporarily stop the heart, perform extracorporeal blood circulation using a pump and an artificial lung, and substitute the heart and lung functions during cardiac arrest. For extracorporeal circulation, it is necessary to connect a blood removal catheter and a blood return catheter to the heart.
Administration of heparin is also essential to prevent clotting.

Therefore, it is not the bypass operation itself,
The burden imposed on the patient by setting the environment for doing so is large. Also in the cardiovascular bypass operation, if the bypass operation can be performed within an allowable cardiac arrest time, it is not necessary to perform the extracorporeal blood circulation as described above. For this purpose, the work of connecting the graft must be easy.

[0006]

[Problems to be Solved by the Invention] Vascular anastomosis using a magnet
For parts for use, see Japanese Unexamined Patent Publication No. 52-151282.
There is one shown. This vascular anastomosis component uses a magnetic material.
It is easy to perform anastomosis of blood vessels because it is formed
Wear. However, in Japanese Patent Laid-Open No. 52-151482,
SmCo as forming material Only 5 is disclosed. This species
The parts are embedded semi-permanently in the living body. But S
mCo When 5 is used, there are problems such as corrosion,
In addition, there is a problem that precision processing is difficult.

Therefore, the present invention provides a hollow organ connecting device which can easily connect hollow organs in a living body and which can be used for a long period of time with less possibility of corrosion. More specifically, it is possible to provide a hollow organ connecting device which can easily connect the cut hollow organs after partial excision of the living hollow organs in the laparoscopic surgery and has a low possibility of corrosion and can be used for a long period of time. It is provided. Further, specifically, in coronary artery bypass grafting, the bypass graft can be connected in a short time so that extracorporeal blood circulation is not required, and there is little possibility of corrosion and long-term use is possible. A hollow organ connecting device is provided.

[0008]

[Means for Solving the Problems] Achieving the above-mentioned object is to form at least two openings with a platinum magnet containing Pt in an amount of 33 to 47 atomic% and the balance being Fe and inevitable impurities and having good corrosion resistance. A first part having at least one end which can be fixed to the hollow organ to be treated
A tubular member, and at least one opening attached to the opening of the first tubular member by a magnetic attraction force, and
A hollow organ connecting device comprising a second tubular member, at least one end of which can be fixed to a tubular body connected to the hollow organ to be treated or to the hollow organ to be treated.

In order to achieve the above object, Pt is 33 to 47 atomic% and Ti, Mo, Nb, Ta, W, C is used.
containing 0.1 to 10 atom% of one or more of r and V,
A first tubular shape, the balance of which is formed of platinum magnet having good corrosion resistance, which is composed of Fe and unavoidable impurities, has at least two openings, and at least one end of which can be fixed to the hollow organ to be treated. A member, and at least a tubular body having at least one opening attached to the opening of the first tubular member by a magnetic attraction force and having a hollow organ to be treated or connected to the hollow organ to be treated. It is a hollow organ connecting device including a second tubular member whose one end can be fixed.

The second tubular member is the first tubular member.
It is preferable that it is formed of the same platinum magnet as that of the cylindrical member. The hollow organ connecting device is, for example, a hollow organ connecting device for body arthroscopic surgery. The hollow organ connecting device is, for example, a coronary artery bypass forming vascular connecting device. It is preferable that the openings to which the first tubular member and the second tubular member are attached have a paired joint structure.

[0011]

The hollow organ connecting device of the present invention comprises a first tubular member formed of a platinum magnet and a second tubular member which is attached to the first tubular member by a magnetic attraction force. . The first tubular member is fixed to one of the connected living hollow organs, and the second tubular member is fixed to the other of the connected living hollow organs. Since the two tubular members are attracted and fixed by magnetic force, they can be easily connected. Further, since the tubular member is formed of a platinum magnet, it is hardly corroded even when left in the living body, and the hollow organ can be connected for a long period of time.

[0012]

EXAMPLES The hollow organ connecting device of the present invention will be described with reference to the examples shown in the drawings. FIG. 1 is a partially cutaway sectional view of an embodiment in which the hollow organ connecting instrument of the present invention is applied to a hollow organ connecting instrument for body cavity endoscopic surgery. The hollow organ connecting device 1 of the present invention is formed of a so-called platinum magnet, has at least two openings 2b and 2c, and has at least one end that can be inserted into the hollow organ to be treated. A member 2 and at least one opening 3b attached to the opening 2a of the first tubular member 2 by a magnetic attraction force, and a hollow body to be treated or a tubular body connected to the hollow organ to be treated ( A second tubular member 3 at least one end of which can be inserted into or fixed to the graft).

A more specific description will be given below. The hollow organ connecting instrument according to this embodiment is used for so-called body arthroscopic surgery, and is used, for example, to connect a partially excised intestinal tract to excise a tumor site. The hollow organ connecting device 1 includes a first tubular member 2 and a second tubular member 2.
The tubular member 3 of FIG. The first tubular member contains, for example, 33 to 47 atom% of Pt and the balance is Fe.
It is made of platinum magnet with good corrosion resistance consisting of inevitable impurities. When Pt is less than 33 atomic%, the maximum energy product, which is a magnet performance value, becomes 4 MGOe or less and becomes magnetically insufficient, and when Pt exceeds 47 atomic%, the residual magnetic flux density decreases to 6 kG or less and magnetically becomes insufficient. Will be enough. More preferably, the first tubular member contains 33 to 47 atomic% of Pt and Ti, Mo, Nb, Ta, W, C.
containing 0.1 to 10 atom% of one or more of r and V,
The balance is made of platinum magnet having good corrosion resistance, which is composed of Fe and unavoidable impurities.

By containing the element other than iron, the production can be performed in a short time, and the precision workability and the stability of the magnet performance are improved. When the addition amount of the above element is less than 0.1 atom% or exceeds 10 atom%,
The above effect cannot be obtained. Since the first tubular member is formed of the above-mentioned platinum magnet, it has almost the same magnetic performance as the Sm-Co rare earth magnet, and it hardly corrodes and is embedded in the living body for a long term. It is possible to use.

The magnetic performance of the first tubular member 2 is not particularly limited, and there is no risk of spontaneous detachment from the second tubular member when it is implanted in the living body, and the surgeon does not have to worry about it. It is sufficient if both can be removed when a certain amount of force is applied. Specifically, the residual magnetic flux density (Br) is 10 to 11k.
G, coercive force (Hc) of 4.5 to 5.5 kOe, and maximum energy product ((BH) max) of 20 to 25 MGOe are preferable.

The second tubular member is not likely to come off from the first tubular member by itself when it is embedded in the living body, and is removed when the surgeon applies a certain amount of force. Any material may be used as long as it is attached (adsorbed and fixed) with a strength that allows it. For example, magnetic materials or non-magnetic materials such as iron, stainless steel,
Further, those plated with a noble metal (for example, platinum or gold) can be used. More preferably, it is preferable to use the same or the same kind of platinum magnet as the first tubular member. Particularly, the same one is preferable. If the material forming the second tubular member has a lower ionization tendency than the material forming the first tubular member, the second tubular member may corrode due to the local battery action. If there is no such problem.

The shapes of the first tubular member 2 and the second tubular member will be described. As shown in FIG. 1, the first tubular member 2 is a tubular body having an overall inner diameter that is substantially the same and an outer diameter that is substantially the same except for the connecting portion 2a. The connecting portion 2a has an outer diameter that can be inserted into the connecting portion 3a in which the inner diameter of the second tubular body, which will be described later, is expanded, and is thinner and smaller in outer diameter than other portions. There is. Further, both ends 2b and 2c of the first tubular member 2 are open and form a passage that penetrates inside. On the outer surface of the tubular member 2,
An annular groove 2d for ligation is formed. After positioning the end of the tubular member 2 in the intestinal tract, at the annular groove 2d portion,
By binding the intestinal tract and the tubular member with a ligature, both are fixed in a liquid-tight manner.

The outer diameter of the first tubular member 2 varies depending on the site to be treated, but is an outer diameter that can be inserted into the hollow organ of the site to be treated. Specifically, in the case of the intestinal tract,
About 10 to 30 mm is suitable. It is preferable that the inner diameter is larger from the viewpoint of securing the internal flow path, but if the wall thickness is too thin, the strength of the tubular member will decrease, so the inner diameter is preferably smaller than the outer diameter by about 0.1 to 2 mm. The width of the annular groove is preferably 0.05 to 2 mm. A plurality of annular grooves may be provided instead of one. The overall length of the tubular member 2 is 5
Approximately 50 mm is suitable. Further, the length of the connecting portion 2a is preferably about 2 to 30 mm.

The second tubular member 3 is, as shown in FIG.
The overall inner diameter is substantially the same, and the outer diameter is substantially the same except for the connecting portion 3a, which is a tubular body. Connection part 3a
Has an inner diameter into which the connecting portion 2a of the first tubular member can be inserted, and is thinner and smaller in inner diameter than other portions. Both ends 3b and 3c of the second tubular member 3 are open and form a passage that penetrates inside. An annular groove 3d for ligation is formed on the outer surface of the tubular member 3.
After the end of the tubular member 3 is positioned in the intestinal tract, the intestinal tract and the tubular member are tied with a ligature at the annular groove 3d so that the both are almost liquid-tightly fixed.

The outer diameter of the second tubular member 3 varies depending on the site to be treated, but is such that it can be inserted into the hollow organ of the site to be treated. Specifically, in the case of the intestinal tract,
About 10 to 30 mm is suitable. It is preferable that the inner diameter is larger from the viewpoint of securing the internal flow passage, but if the wall thickness is too thin, the strength of the tubular member decreases, so the inner diameter is preferably smaller than the outer diameter by about 0.1 to 2 mm. The width of the annular groove is preferably 0.05 to 2 mm. Further, a plurality of annular grooves may be provided instead of one. The overall length of the tubular member 3 is preferably about 5 to 50 mm. Also, the connecting portion 3
The length of a is preferably about 2 to 30 mm.

The tubular members 2, 3 having such a shape
Is manufactured using the above materials as follows. First, the above-mentioned material containing platinum as a main component is vacuum-high frequency melted, and then centrifugally cast to finish into a shape having a cavity substantially matching the basic shapes of the first tubular member and the second tubular member. Then, the burrs formed on the surface of the platinum forming material are removed and the surface is polished, and further,
The annular groove and the connecting portion are formed at predetermined positions by a method such as wire sawing or electric discharge machining. Subsequently, the platinum formation is subjected to 900-140 in a vacuum or non-oxidizing atmosphere.
Solution treatment is performed by heat treatment at a temperature of 0 ° C. for 1 minute to 100 hours. Immediately after that, the platinum molded product is water-cooled or oil-cooled, and again in vacuum or in a non-oxidizing atmosphere, the temperature of 450-
After heat treatment at a temperature of 800 ° C. for 1 minute to 500 hours,
Cool the furnace. After that, the platinum molded product is magnetized in a direct current magnetic field of 2 stella or more, whereby a magnetized cylindrical member used in the connecting device of the present invention is produced.

Next, the hollow organ connecting device 10 of the embodiment shown in FIG. 2 will be described. This hollow organ connecting device 1
0 has the same basic configuration as that of the connecting device 1 described above. The first tubular member 12 is, as shown in FIG.
The inner diameter of the whole is almost the same, and the outer diameter is expanded toward the connecting portion 12a. In other words, the open end 12b
The diameter is decreasing in the direction. In addition, the first tubular member 1
Both ends 12b, 12c of 2 are open and form a passage that penetrates inside. On the outer surface of the cylindrical member 12, annular grooves 12d and 12e for ligation are formed. After positioning the end of the tubular member 12 in the intestinal tract, the annular groove 12
By binding from the outside of the intestinal tract at d and 12e,
Both are fixed almost liquid-tightly. The outer diameter, the inner diameter, and the length of the tubular member 12 are the same as those in the above-described embodiments. The taper degree of the outer surface is preferably about 5 to 50%.

As shown in FIG. 2, the second tubular member 13 has a substantially same inner diameter as a whole and an outer diameter of the connecting portion 13a.
The diameter increases in the direction. In other words, open end 1
The diameter is reduced in the 3c direction. Second tubular member 13
Both ends 13b and 13c are open and form a passage that penetrates inside. On the outer surface of the tubular member 13, annular grooves 13d and 13e for ligation are formed. After positioning the end of the tubular member 13 in the intestinal tract, the annular groove 13
By binding the intestinal tract from the outside at the d and 13e parts,
Both are fixed almost liquid-tightly. The outer diameter, the inner diameter, and the length of the tubular member 13 are the same as those in the above-described embodiments. The taper degree of the outer surface is preferably about 5 to 50%.

The shapes of the connecting portions 12a and 13a, in other words, the connecting structure (joint structure) of the first tubular member and the second tubular member is not limited to those shown in FIGS. Anything can be used as long as it can be connected. For example, concavities and convexities (for example, gear-shaped concavities and convexities) that engage with each other may be provided at the connected ends of the first tubular member and the second tubular member. Further, in the hollow organ connecting device of the present invention, the connecting portion of the first tubular member and the second tubular member may be magnetically attracted, and the other portions need not be magnetic materials. . That is, the structure may be such that only the connecting portion is formed of the platinum magnet described above and these are attached to the end portion of the soft resin tube.

Next, the hollow organ connecting device of the embodiment shown in FIG. 3 will be described. The hollow organ connecting device of this embodiment is a hollow organ connecting device for coronary artery bypass graft surgery. The connecting device 30 is connected to a first tubular member 31 (T-shaped tubular member, a member for inserting a coronary artery) having one branch portion 35, and a connecting portion 31 a formed in the branch portion 35. The second tubular member 32 is provided with the connecting portion 32b. The tubular member 31, as shown in FIG.
The main body 34 is a tubular body having substantially the same outer diameter and the same inner diameter, and has openings 31b and 31c at both ends.

The branch portion 35 has a connecting portion 31a formed at the tip and an opening 31f opened at the end of this connecting portion. The connecting portion 31a has an outer diameter smaller than that of the other portions, and can be inserted and fixed (liquid-tight fixing) in the connecting portion 32a of the second tubular member (graft connecting member) described later. ing. Three openings 31b, 31c,
31 f communicates with each other inside the tubular member 31. Annular grooves 31d and 31e for ligation are formed near the end of the main body of the tubular member 31.

The outer diameter of the main body 34 is 2 to 30 mm.
Is preferable, and more preferably 2 to 6 mm. The inner diameter of the main body is preferably smaller than the outer diameter by about 0.1 to 2 mm. The outer diameter of the branch portion 35 is 2 to 8 m.
m is preferable, and more preferably 2 to 4 mm. The inner diameter of the branch portion is preferably smaller than the outer diameter by about 0.1 to 2 mm. The angle of formation of the branch with respect to the main body is preferably about 10 to 60 °. As shown in FIG. 3, it is preferable that the position of the branch portion 35 is substantially the central portion of the main body portion 34, but it may be near one end portion.

The second tubular member 32 (graft connecting member) has substantially the same outer diameter, and has the above-mentioned connecting portion 32a.
Except for, it is a cylindrical body having almost the same inner diameter. The connecting portion 32a has a shape capable of accommodating the connecting portion 31a of the first tubular member 31. An annular groove 32d for ligation with a tubular body (graft), one end of which is connected to the hollow organ to be treated, is formed in approximately the center of the tubular member 32,
From the open end 32c of the tubular member 32 to a portion slightly beyond the annular groove 32d, the outer diameter is such that it can be inserted into the graft.

As the graft (tubular body), an artificial blood vessel or an autologous femoral vein prepared in advance is used. The tubular member is attached to one end of the graft as described above.
The other end of the graft is connected to the coronary artery downstream of the stenosis site. The specific outer diameter of the tubular member 32 is 2 to
It is preferably 8 mm, more preferably 2 to 6 mm. The inner diameter of the branch portion is preferably smaller than the outer diameter by about 0.1 to 2 mm. The angle of formation of the branch with respect to the main body is preferably about 10 to 60 °.

Next, a method of using the hollow organ connecting device of the present invention will be described. The method of using the hollow organ connecting device 1 shown in FIG. 1 is as follows. First, a catheter having a balloon whose distal end has a larger outer diameter when expanded than the inner diameters of the first tubular member 2 and the second tubular member 3 is prepared. Then, the distal end portion of the catheter is inserted into the tubular member 2, and the balloon is inflated to fix the tubular member 2 to the catheter. Next, the catheter to which the first tubular member is attached is inserted from the anus of the patient, and the first tubular member is made to reach a position slightly on the stomach side from the excision site of the intestinal tract. After the indwelling position is X-ray contrasted or the endoscope is confirmed to be inserted into the lumen of the balloon catheter, the balloon catheter is deflated and removed.

Similarly, a catheter to which the second tubular member is attached is inserted from the patient's anus until the second tubular member reaches a position slightly on the anus side of the excision site of the intestinal tract. This state is confirmed by X-ray contrast or the like. Since the first and second tubular members are formed of platinum magnets, they can be easily confirmed by X-ray imaging. The indwelling site of the tubular member may be directly confirmed by inserting an endoscope into the lumen of the balloon catheter. The pneumoperitoneum of the pneumoperitoneum device is inserted through the abdominal wall, and the abdominal cavity is filled with carbon dioxide gas to inflate the abdominal cavity. A small incision is made in the abdominal wall, and the inner diameter is 5 mm
Alternatively, insert four or five 10 mm tubular tracker cannulas into the abdominal cavity. A laparoscopic and laparoscopic surgical instrument is inserted through the tracker cannula so that the miniature camera portion of the laparoscope and the tip of the laparoscopic surgical instrument are located within the abdominal cavity. Images from the laparoscope and endoscope are displayed on the monitor.

Under the observation of the monitor, the intestinal tract at the site where the tumor is formed is excised using a surgical instrument under the endoscope. A plurality of surgical instruments are inserted into the abdominal cavity, and different surgical instruments are attached to their tips. Excision is performed as follows. Two pieces having forceps-like tips are used to clamp the front and back of the resection site. Using a surgical instrument having a ligation instrument at its tip, the tubular member is fixed to the intestine by ligating it from the outside of the intestine.

Then, using a surgical instrument having an electric knife at the tip, the intestinal tract is cut outside each tubular member and at a position closer to the resection site than the ligation site. When it is necessary to remove the intestinal resection material, the resection material is divided into several pieces, and the cancer cells that have formed inside are cut off by irradiating them with a laser, and then inserted into the lumen of the catheter. The endoscope is removed, and the cut off piece is pushed into the catheter using the forceps of the surgical instrument, sucked from the rear end of the catheter, and taken out through the catheter.
Then, the connecting portions of the first and second tubular members are brought close to each other,
Both are attracted and fixed by the magnetic attraction. And
After the balloon is deflated, the catheter is removed from the body, and the endoscopic surgical instrument and tracker
The procedure is completed by removing the cannula and suturing the puncture site.

Next, the hollow organ connecting device 1 shown in FIG.
A method of using 0 will be described. First, insert an endoscope through the anus and check the excised site of the intestinal tract. The pneumoperitoneum of the pneumoperitoneum device is inserted through the abdominal wall, and the abdominal cavity is filled with carbon dioxide gas to inflate the abdominal cavity. Next, make a small incision in the abdominal wall, and have an inner diameter of 5 m.
4 m or 10 mm tubular tracker cannula
Insert 5 or 5 into the abdominal cavity. In addition, the laparoscopic and laparoscopic surgical instruments are inserted through the tracker cannula so that the miniature camera portion of the laparoscope and the distal portion of the laparoscopic surgical instruments are located within the abdominal cavity.
Images of a laparoscope and an endoscope are displayed on a monitor.

Under the observation of the monitor, the intestinal tract at the site where the tumor is formed is excised and the excision site is joined using a surgical instrument under the endoscope. Specifically, an incision portion into which the tubular member shown in FIG. 2 can be inserted is formed in the abdomen, a tubular member insertion catheter is inserted into the incision portion, and the first and second tubular members are passed through the catheter. Insert the member into the abdominal cavity. Then, the tubular member is held by the forceps, and the intestinal tract is cut from the outside of each tubular member using a surgical instrument having an electric knife at the tip.

The first and second tubular members are inserted into the two ends of the cut intestinal tract from the small diameter side thereof, and a surgical instrument having a ligation instrument at the tip is used to ligate from the outside of the intestinal tract. The member is fixed to the intestinal tract. Then, the connecting portions of the first and second tubular members are brought close to each other, and are attracted and fixed by the magnetic attraction force of both. In addition, the intestinal resection material is taken out of the body through the catheter for inserting the tubular member. Then, the surgical instrument under the thoracoscope, the tracker cannula, and the catheter are removed, and the puncture site is sutured to complete the procedure.

Next, the hollow organ connecting device 3 shown in FIG.
A method of using 0 will be described. An artificial blood vessel (graft) having the second tubular member 32 attached to its end is prepared. Then, an upstream side (main trunk coronary artery or ascending aorta) of the stenosis of the coronary artery of the patient is incised, both ends of the incision are tied with a thread to stop bleeding, and a T-shaped tubular member 31 is fitted into the incision and ligated. Secure with a thread. The coronary artery on the downstream side of the stenosis is incised, and the end of the artificial blood vessel to which the second tubular member 32 is attached (the portion where the tubular member is not attached) is inserted and sutured.

Subsequently, the second tubular member is fixed to the branch connecting portion of the first tubular member by using the magnet attraction force of the two. The procedure can be performed in a short time without the need for complicated stitching to connect the two. In addition, it is necessary to remove the air in the graft in order to prevent blood and the air remaining in the graft from contacting and coagulating to form a thrombus. Since it can be removed, air removal is easy.

According to the hollow organ connecting device of this embodiment, the graft can be fixed to the second tubular member in advance, and the branch portion of the main coronary artery can be formed.
This can be performed by inserting the first tubular member into the incision portion of the main coronary artery and ligating and fixing both ends of the tubular member. Therefore, it is only the graft and the coronary artery on the downstream side that need to be sutured, and bypass formation can be performed in a short procedure time.

(Experiment) Using the platinum magnet described above,
A tubular body having an inner diameter of 5 mm was prepared. Under anesthesia, the carotid artery of the experimental dog was exposed, and an incision was made with a scalpel. The tubular body was inserted, and both ends were ligated and fixed with a surgical suture. During this time, the time during which the blood flow was blocked was about 1 minute. After the wound was closed, an experimental dog was bred, and after 1 week, angiography was performed to observe its patency. Although a step was observed between the natural blood vessel and both ends of the tubular body, the tubular body was well patented and no stenosis was observed. Hemocompatibility is good as shown by the patency of the inner diameter of 5 mm in dogs.

[0041]

The hollow organ connecting device of the present invention is formed of the above-mentioned platinum magnet, has at least two openings, and has at least one end fixable to the hollow organ to be treated. A tubular member, and a tubular member having at least one opening attached to the opening of the first tubular member by a magnetic attraction force, and being connected to a hollow organ to be treated or a hollow organ to be treated. It comprises a second tubular member, at least one end of which can be fixed to the body. The first tubular member is fixed to one of the connected hollow organs, the second tubular member is fixed to the other of the connected hollow organs, and the two tubular members are attracted and fixed by magnetic force, so that the connection is It's easy. Moreover, since the tubular member is formed of a platinum magnet, there is almost no risk of corrosion even when it is left in the living body, and hollow organs can be connected for a long period of time.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view showing a hollow organ connecting device according to an embodiment of the present invention.

FIG. 2 is a partially cutaway sectional view showing a hollow organ connecting device according to another embodiment of the present invention.

FIG. 3 is a perspective view showing a hollow organ connecting device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hollow organ connecting instrument 2 1st tubular member 2a connection part 2d annular groove 3 2nd tubular member 3a connection part 3d annular groove 10 Hollow organ connecting device 12 1st tubular member 13 2nd tube Member 30 Hollow organ connecting device 32 First tubular member 33 Second tubular member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiro Matsui 2-10-1 Toranomon, Tokyo Inside Japan Pan Energy Co., Ltd.

Claims (6)

[Claims] 1. An alloy containing 33 to 47 atomic% of Pt and the balance of F
a first tubular member which is formed of a platinum magnet having good corrosion resistance consisting of e and inevitable impurities, has at least two openings, and at least one end of which can be fixed to the hollow organ to be treated. A tubular body having at least one opening attached to the opening of the first tubular member by a magnetic attraction force and having a hollow body to be treated or a tubular body connected to the hollow organ to be treated And a second cylindrical member that can be fixed. 2. The second tubular member is formed of the same platinum magnet as the first tubular member.
The device for connecting hollow organs according to item 1. 3. Pt of 33 to 47 atomic% and Ti, Mo,
One or more of Nb, Ta, W, Cr, and V is 0.1
It is made of a platinum magnet containing 10 atomic% to 10 atomic% and the balance being Fe and unavoidable impurities and having good corrosion resistance, has at least two openings, and at least one end can be fixed to the hollow organ to be treated. A first tubular member,
At least one opening is attached to the opening of the first tubular member by a magnetic attraction force, and at least one end of the tubular body to be treated or the tubular body connected to the hollow organ to be treated has at least one end. A hollow organ connecting device comprising a securable second tubular member. 4. The second tubular member is formed of the same platinum magnet as the first tubular member.
The device for connecting hollow organs according to item 1. 5. The hollow organ connecting device according to claim 1, wherein the hollow organ connecting device is a hollow organ connecting device for body cavity endoscopic surgery. 6. The hollow according to claim 1, wherein the respective openings to which the first tubular member and the second tubular member are attached have a paired joint structure. Instrument for organ connection.