JPH03123543A - Organism pipeline closing device - Google Patents

Abstract

PURPOSE:To enable easy and tight mounting on an organism pipeline regardless of a diameter of the organism pipeline by including a shape keeping member adapted to be deformable optionally and holds the shape thereof after the deformation thereof and a tube which is connected to a bag-shaped elastic body to feed or discharge a fluid to expand it. CONSTITUTION:A shape keeping member 3 is made up of a bandshaped shape keep plate 8 with the shape thereof deformable optionally and holdable covered with an elastic sheet 9 not harmful to a human body, for example, polyurethane, silicone rubber and fluororubber. To mount a closing tool 1 on a collective liver artery 16, when a thermoplastic resin is used as the shape keeping plate 8, it is heated upon a specified temperature to soften. Thereafter, with a bag elastic body 2 inside, the closing tool 1 is wound spirally on the outer circumference of the collective liver artery 16 by 2 or 3 turns covering it. Then, the shape keeping plate 8 is cooled naturally and hardened with the shape thereof kept as intact. Thus, the closing tool 1 is fixed on the collective liver artery 16.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a biological conduit occluding device for repeatedly occluding a biological conduit such as a blood vessel.

[Prior Art] For example, as a treatment for liver cancer, a catheter tip is inserted and placed from the gastric/duodenal artery toward the proper hepatic artery through laparotomy, and mitomycin C,
Adriamycin, cisbratinum, 5-FU (
Anticancer agent injection therapy (TAI), which involves injecting anticancer agents such as the above (trade names), is known.

However, in such treatment methods, the above-mentioned gastric
Because the speed of blood flow from the general artery leading to the duodenal artery is fast, even if an anticancer drug is injected through a catheter, it is immediately discharged from the hepatic vein, and the time it takes to accumulate in the liver is extremely short. Therefore, in order to obtain a good therapeutic effect, it is necessary to occlude the general artery to block blood flow for about 30 to 60 minutes.

Therefore, Japanese Utility Model Application Publication No. 64-49253 discloses a biological conduit occluding device that can repeatedly occlude a biological conduit such as a common artery over a long period of time. This consists of a tube connected to a bag-like elastic body that covers a biological conduit, and by sending and discharging fluid to and from the bag-like elastic body through the tube, the bag-like elastic body expands and contracts. This method involves repeatedly opening and closing the biological duct. To attach this obturator to a biological conduit, first wrap a bag-like elastic body around the biological conduit in a state that covers it, bring both ends together, and attach a pair of fasteners to each end. The attachment was fixed to the biological conduit by passing a thread through the hole and tying it.

[Problems to be Solved by the Invention] As mentioned above, when attaching conventional obturators to biological ducts, detailed operations such as fixing with threads are required, and the attachment takes time during work. It required In addition, the diameter of the biological conduit varies depending on the individual and the type of biological conduit, but the above obturator has a fixed shape, that is, the inner diameter of the obturator changes depending on the diameter of the biological conduit. Since the obturator is not equipped with such means, the inner diameter of the obturator may be too small or too large for the biological conduit. In this way, if the inner diameter of the obturator is too small, it will continue to compress the biological duct, causing damage to the living body, and if it is too large, it may not be able to sufficiently occlude the biological duct, or the obturator may be placed on the biological duct. There is a risk that it will move and hit and compress surrounding organs and tissues, causing various problems.

The present invention has been made in view of the above circumstances, and its purpose is to
To provide a biological conduit obturator that can be easily and snugly attached to the biological conduit without being too tight or too loose.

[Means and Effects for Solving the Problems] In order to achieve the above object, the biological conduit obturator of the present invention includes a bag-like elastic body that covers the biological conduit and closes the biological conduit by being expanded. and is provided in contact with the bag-like elastic body, and when covering the biological conduit with the bag-like elastic body, can be arbitrarily deformed into a shape suitable for the intended biological conduit, and maintains the shape after deformation. It includes a shape retaining member and a tube that is connected to the bag-like elastic body and sends and discharges a fluid that expands the bag-like elastic body. To attach the obturator to the biological conduit, all that is required is to arbitrarily deform the shape-retaining member into a shape suitable for the intended biological conduit and wrap the obturator around the biological conduit. However, since the wrapping maintains its condition, the obturator can be fixed as is.

[Example] Hereinafter, FIGS. 1 to 6 will be explained regarding the first example of the present invention.
This will be explained with reference to the figures.

In the figure, 1 is the obturator of the present invention, which includes a bag-like elastic body 2, a shape-retaining member 3 provided in contact with the lower surface of the bag-like elastic body 2, and a shape-retaining member 3 connected to the bag-like elastic body 2. The tube 4 is made up of

The bag-shaped elastic body 2 is made by airtightly welding or bonding the peripheral parts of a first sheet 5 and a second sheet 6 made of an elastic material that is not harmful to the human body, such as polyurethane, silicone rubber, or fluorine rubber. A space 7 is formed between these joint surfaces, and one end of the tube 4 is airtightly connected to the space 7 so as to communicate with the space 7 .

In addition, the shape-retaining member 3 includes a band-shaped shape-retaining plate 8 that can arbitrarily deform and retain its shape, and is covered with an elastic sheet 9 that is not harmful to the human body, such as polyurethane, silicone rubber, or fluorine rubber. It is welded or adhered to the lower surface of the second sheet 6 of the bag-like elastic body 2. The shape-retaining plate 8 is made of thermoplastic resin, which changes from a rigid body to a soft body when heated and becomes easily deformable, and returns to a rigid body to maintain its shape when the temperature drops; Alternatively, a shape memory resin that becomes a rubber-like elastic body when heated and becomes a rigid body when the temperature drops, or a flexible metal such as copper or silver may be used. In addition, the other end of the tube 4 has an INFUSE-A-PORT,
A subcutaneously implantable fluid delivery/drainage device 10 such as Portacut (the above is a trade name) is connected.

FIG. 4 shows the obturator 1 in use. That is, 1
1 is the liver, 12 is the stomach, 13 is the abdominal aorta, 14 is the gastric/duodenal artery, 15 is the proper hepatic artery, and 16 is the total artery. The total artery 16 can be occluded or opened.

Further, a catheter 17 for injecting an anticancer drug is inserted and left in place from the gastric/duodenal artery 14 with its tip directed toward the liver 11 side. This catheter 17 is provided with a plurality of nodes 18 at predetermined intervals in the axial direction. The tip section 18a is rounded to facilitate insertion of the catheter 17 and help position the tip, and the other sections 18 serve to secure the catheter 17.

In order to attach the obturator 1 to the total artery 16, if thermoplastic resin is used as the shape-retaining plate 8, it is heated to a predetermined temperature to make it soft, and then the bag-shaped elastic body 2 is placed inside. The obturator 1 is wound helically around the outer periphery of the total artery 16 two to three times to cover it. Thereafter, the shape-retaining plate 8 is naturally cooled and hardened while maintaining its shape. Thereby, the obturator 1 is fixed to the total artery 16. Further, even when shape memory resin is used as the shape retaining plate 8, it can be attached in the same manner as described above.

On the other hand, when a flexible metal such as copper or silver is used as the shape-retaining plate 8, it can be attached without heating it.

5 and 6 are cross-sections of the obturator 1 fixed to the total artery 16, but the cross-section of the shape-retaining member 3 is omitted here. As shown in FIG. 5, the bag-shaped elastic body 2
When fluid is not supplied to the space 7 of the total artery 1
6 is open. When an anticancer drug is injected into the liver 11, fluid is supplied from outside the living body to the space 7 of the bag-like elastic body 2 via the fluid delivery/discharge device 10 and the tube 4. Then, the bag-like elastic body 2 is expanded, thereby crushing and occluding the total artery 16 as shown in FIG. Then, the flow of blood from the total artery 16 is stopped, and if an anticancer drug is injected into the liver 11 from the catheter 17 in this state, it can be stopped in the liver 11 for a long time, thereby obtaining a good therapeutic effect. be able to.

Further, when such a treatment is completed and the total artery 16 is to be opened, the fluid is extracted from the space 7 of the bag-like elastic body 2 through the tube 4 and the fluid supply/exhaust device 10, and the fluid is drawn out as shown in FIG. All you have to do is reduce it as shown.

In this way, when attaching the obturator 1 to the total artery 16, the shape-retaining member 3 is heated to make it soft and deformable, and then the obturator 1 is simply wound around the total artery 16 multiple times in a spiral shape. Then, after a while, the temperature of the shape-retaining member 3 decreases and hardens, and the wrapping retains its state, so the obturator 1 can be fixed as is, compared to the conventional method of fixing with thread. , can be installed easily and in a short time. In addition, in this way, the obturator 1 is connected to the total artery 1.
I fixed it by simply wrapping it around 6 multiple times, so
The inner diameter of the obturator 1 can be arbitrarily changed according to the diameter of the total artery 16, and therefore, regardless of the diameter of the total artery 16, the obturator 1 can be fitted snugly to the total artery 16 without being too tight or too loose.

Therefore, it is possible to prevent the inner diameter of the obturator 1 from being too small with respect to the diameter of the total artery 16 and causing damage to the living body by continuing to compress the total artery 16, and to prevent the inner diameter of the obturator 1 from being too large and sufficiently large. It is possible to prevent failure to occlude the artery 16 or the obturator 1 moving over the total artery 16 and hitting surrounding organs or tissues and compressing them, thereby enabling safe and reliable treatment. Furthermore, as described above, one type of obturator 1 can be used for arteries 16 of different diameters, so there is no need to prepare several types of obturators 1 depending on the thickness of the arteries 16, resulting in low cost. .

7 to 11 show a second embodiment of the invention.

In this case, the obturator 21 in the first embodiment is wound around the total artery 16 two to three times in a spiral manner, whereas
It is designed to be wrapped around the circumference. Further, for the shape retaining plate 23 of the shape retaining member 22, in addition to using thermoplastic resin, shape memory resin, flexible metal such as copper or silver as in the first embodiment, shape memory alloy can also be used.

In the obturator 21 having such a configuration, the shape retaining plate 23
When a shape memory alloy is used for the
The shape as shown in the figure is memorized, and the wrapping around the total artery 16 is fixed as shown in FIG. 9 by later heating it to a predetermined temperature or higher. Further, when the shape-retaining plate 23 is made of thermoplastic resin, shape-memory resin, or flexible metal such as copper or silver, it can be attached in the same manner as in the first embodiment.

10 and 11 are cross-sections of the obturator 21 fixed to the total artery 16, but here the shape-retaining member 2
The cross section of No. 2 is omitted. As shown in these figures, the total artery 16 can be repeatedly opened and closed in the same manner as in the first embodiment.

According to such an obturator 21, it can be installed more easily than that of the first embodiment.

12 to 14 show a third embodiment of the present invention.

The second sheet 26 that constitutes the bag-like elastic body 25 in this case
are made of a material with a small elastic modulus, for example, a non-extensible material such as Teflon, and a pair of flexible sheets are located between the first sheet 27 and the second sheet 26 on both sides thereof. A wire (shape retaining member) 28.28 is sandwiched.

The obturator 29 having such a structure deforms the wire 28.28 and wraps the bag-like elastic body 25 around the total artery 16 approximately once, so that the state is maintained by the wire 28.28, and thereby the total total It is attached to the artery 16.

According to such an obturator 29, the wire 28 which is a small member
．． 28 is used as a shape-retaining member, and this is used as the bag-shaped elastic body 2.
5, the entire structure can be made thinner and more compact than those of the first and second embodiments.

Note that the present invention is not limited to each of the above embodiments, and for example, the first embodiment
As shown in FIG. 5, the obturator 34 is
may be fixed to the biological duct more reliably. In addition, the obturator 1 according to the present invention is applicable not only to the total artery 16 but also to the vasculature of arteries, veins, and portal veins, as well as the vas deferens,
Of course, it can be applied to various biological ducts such as fallopian tubes and urethra.

[Effects of the Invention] As described above, according to the present invention, when attaching an obturator to a biological conduit, the shape-retaining member is arbitrarily deformed into a shape suitable for the intended biological conduit, and the obturator is attached to the biological conduit as described above. Just wrap it around the biological conduit, and the shape-retaining member maintains its wrapped state, so the obturator can be fixed as is, making it easier and faster to attach than when fixing with thread. can. In addition, since the obturator is fixed by simply wrapping it around the biological conduit, the inner diameter of the obturator can be arbitrarily changed according to the diameter of the biological conduit, and therefore, regardless of the diameter of the biological conduit, This allows the obturator to be placed snugly without being too tight or too loose. Therefore, it is possible to prevent the inner diameter of the obturator from being too small relative to the diameter of the biological duct and causing continued pressure on the biological duct and causing damage to the living organism, and also to prevent the internal diameter of the obturator from being too large and not being able to sufficiently occlude the biological duct. It is possible to prevent the obturator from moving on the biological conduit and hitting and compressing surrounding organs and tissues, making it possible to perform safe and reliable treatment. Furthermore, as described above, one type of obturator can be used for biological ducts of different thicknesses, so there is no need to prepare several types of obturators depending on the thickness of the biological duct, resulting in low cost.

[Brief explanation of drawings]

1 to 6 show a first embodiment of the present invention, FIG. 1 is a side view of the entire obturator in cross section, FIG. 2 is a plan view of the entirety, and FIG. 3 is a perspective view as well. Figure 4 is an explanatory view showing the state of use, Figure 5 is a sectional view of the bag-like elastic body before expansion,
FIG. 6 is a sectional view after expansion, FIGS. 7 to 11 show a second embodiment of the present invention, FIG. 7 is a sectional view of the obturator, and FIG. 8 is a memorized shape of the shape-retaining member. 9 is a perspective view showing the attached state, FIG. 10 is a sectional view before expansion of the bag-like elastic body, FIG. 11 is a sectional view after expansion, and FIGS. Fig. 14 shows a third embodiment of the present invention, Fig. 12 is an exploded perspective view of the obturator, Fig. 13 is a plan view thereof, Fig. 14 is a perspective view showing the installed state, Fig. 15
The figure is a schematic cross-sectional view of a modified obturator. 2.25.31... Bag-like elastic body, 3.22... Shape retaining member, 4... Tube, 16... Total artery, 2
8...Wire (shape retaining member).

Claims (1)

[Claims] A bag-like elastic body that covers a biological duct and expands to close the biological duct, and a bag-like elastic body that is provided in contact with the biological duct and serves as a purpose when covering the biological duct with the bag-like elastic body. A shape-retaining member that can be arbitrarily deformed into a shape suitable for a biological duct and retains the shape after deformation, and a tube that is connected to the bag-like elastic body and that sends and discharges a fluid that expands the bag-like elastic body. A biological conduit obturator characterized by: