JPH02239874A - Biotube expander and biotube expanding device - Google Patents

Abstract

PURPOSE:To allow the insertion of even a large-sized balloon into a living body with good operability and the easy removal of only the endoscope from the inside of the body after the expansion of the balloon by expanding the outside diameter by pressurization to an outer pipeline and reducing the inside diameter by pressurization to an inner pipeline. CONSTITUTION:The biotube expander 1 is fitted onto the outside surface of the front end part of the endoscope 7 and a gas is fed to the inner balloon 3 by the pressurizing pipeline 5 to pressurize and expand the balloon. The biotube expander 1 is thereby fixed to the front end of the endoscope 7. An operator inserts the expander into the gullet while observing the inside thereof with the endoscope 7 and disposes the outer balloon 4 of the biotube expander 1 to face a narrow part 8 upon confirmation of this part. The gas is then fed to the outer balloon 4 via the pressurizing pipeline 6 to fix the biotube expander 11 to the narrow part 8 in tight contact therewith. The pressurization to the inner balloon 3 is thereafter released to allow the inner balloon 3 to contract, by which the fixing of the biotube expander 1 and the endoscope 7 is released.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for dilating biological ducts, specifically, a device for dilating biological ducts that includes a balloon to treat narrowing of biological ducts due to esophageal varices, esophageal cancer, etc. The present invention relates to tools and expansion devices.

[Conventional technology]

Conventionally, a duct dilator equipped with a balloon has been used to treat esophageal stenosis due to esophageal varices, esophageal cancer, etc., and stenosis of the common bile duct. For example, Utsukai Sho 61-106209
The publication discloses a balloon catheter that is inserted into a constricted site of a biological duct and can dilate the constricted site by pressurizing and inflating a balloon provided at its tip. When using such a balloon catheter, it is desirable to insert it while confirming the site to be expanded using an endoscope. In this case, the balloon catheter is inserted through the forceps channel of the endoscope.

[Problem to be solved by the invention]

As mentioned above, when a balloon catheter is inserted through the forceps channel of an endoscope, if the balloon is large, it cannot be inserted through the forceps channel, so it is virtually impossible to use it in combination with the endoscope. It becomes impossible. It is possible to fix the balloon catheter to the outside surface of the endoscope, but in that case, the endoscope cannot be removed even after the balloon is inflated, and the burden on the patient while the balloon is in place would be great. turn into. Alternatively, it may be possible to insert the balloon catheter and endoscope separately, but this would result in significantly poorer operability, increased operating time, and increased burden on the patient.

The present invention has been made in view of the above-mentioned conventional drawbacks,
Even large balloons have good operability when inserted into the body, allowing the balloon to be reliably positioned at the target site, and the endoscope alone can be easily removed from the body after the balloon is expanded. An object of the present invention is to provide a biological channel dilator and an expansion device.

[Means and effects for solving the problems] The biological duct expansion device of the present invention includes a thin annular body, an outer balloon provided outside the annular body, and an outer balloon provided inside the annular body. an inner balloon; and outer and inner pipe lines connected to the outer and inner balloons in order to supply fluid to the outer balloon and the inner balloon so that they can be independently pressurized and inflated. The outer diameter is expanded and the inner diameter is reduced by applying pressure to the inner tube. By applying pressure to the inner tube, the inner balloon can be inflated and fixed to the outer surface of the endoscope, and the narrowed area can be fixed. By applying pressure to the outer duct, the outer balloon is inflated and the stenosis is dilated, and further, by stopping pressurization of the inner duct, the fixation with the endoscope can be released.

Furthermore, the biological conduit expansion device according to claim (2) includes: an endoscope; a thin annular body having an inner diameter larger than the outer diameter of the insertion portion of the endoscope; and a thin annular body provided outside the annular body. a biological conduit dilator having a balloon, and a pressurized conduit connected to the balloon to supply pressurized fluid to the balloon to inflate it under pressure; between the endoscope and the biological conduit dilator; fixing means capable of remotely fixing and unfixing the two to each other;
By remotely attaching and detaching the biological channel dilator to the outer periphery of the insertion section of the endoscope using a fixing means, the dilator can be inserted into the stenosis using the endoscope, and the dilator can be inserted into the stenosis using the endoscope alone. Is it possible to remove it? This will be explained with reference to the figures.

FIG. 1 is a cross-sectional view of a biological channel dilator according to a first embodiment. The biological conduit dilator 1 includes inner balloons 3 on the inner and outer sides of an annular sheet 2 made of a non-stretchable material.
, an outer balloon 4 is provided. The inner balloon 3 and the outer balloon 4 are composed of membranes made of silicone, polyethylene, etc., and when no gas is introduced inside, they are in close contact with the sheet 2, and when gas is introduced, they are expanded under pressure. As shown in FIG. 1, it bulges inward and outward from the seat 2. Pressure conduits 5 and 6 made of elastic tubes are inserted and fixed behind the inner balloon 3 and the outer balloon 4, respectively. This biological channel dilator 1 is inserted into the esophagus together with an endoscope to dilate a narrowed area due to cancer or esophageal varices.The diameter of the seat 2 is larger than the outer diameter of the insertion part of the endoscope. It is also considered to be large.

Next, the operation when this biological channel dilator 1 is used to dilate a stricture in the esophagus will be explained with reference to FIGS. 2 to 5. First, the biological conduit dilator 1 is fitted onto the outer surface of the distal end of the endoscope 7, and gas is supplied to the inner balloon 3 through the pressurizing conduit 5 to inflate it under pressure. As a result, the inner balloon bulges inward, and the endoscope 7
The living body channel dilator 1 is fixed to the distal end of the endoscope 7 by pressing into close contact with the outer surface of the endoscope 7. In this state, as shown in FIGS. 2(a) and 2(b), the esophagus is inserted while observing the inside of the esophagus with the endoscope 7, and when the stricture 8 is confirmed, the living body channel dilator] is inserted into the esophagus. The outer balloons 4 are faced to each other. Next, as shown in FIGS. 3(a) and 3(b), gas is fed into the outer balloon 4 through the pressurizing conduit 6 to inflate the outer balloon 4 under pressure. This outward expansion of the outer balloon 4 expands the constricted portion 8, and the biological channel dilator 1 is tightly fixed to the constricted portion 8. Thereafter, as shown in FIGS. 4(a) and 4(b), the pressure on the inner balloon 3 is released (suction is applied if necessary), the inner balloon 3 is deflated, and the biological channel dilator 1 is removed. Release the fixation with the endoscope 7. Thereby, the endoscope 7 can be removed from the body and only the biological channel dilator 1 can be left in the affected area. This indwelling state is shown in FIG.

According to this embodiment, the biological channel dilator 1 can be quickly inserted into the body, the balloon can be reliably positioned in the affected area to dilate the stenotic area, and the fixation with the endoscope 7 can be easily released. Since only the dilator 1 can be placed,
This can significantly reduce the burden on patients. In this embodiment, both pressurizing pipes 5 and 6 were attached to the balloon at positions that were substantially opposite to each other in the radial direction. You can also.

Next, a second embodiment of the present invention will be explained with reference to FIG. The biological channel dilator 11 of this embodiment has a metal coil 12 fixed to the outer surface of the sheet 2 of the first embodiment described above. A lead wire 13 is attached to the rear end side of this metal coil 12.
are connected and integrated with the pressurizing pipe line 5.

The biological duct dilator 11 of this embodiment is placed in the stenotic site using the same procedure as the biological duct dilator 1 of the first embodiment described above. A high frequency dielectric heating device (not shown) is connected to the lead wire 13 led outside the body, and a body surface electrode connected to the high frequency dielectric heating device is placed on the surface of the external body.

Using this high-frequency dielectric heating device, a high-frequency current is passed between the metal coil 12 and the body surface electrode to heat the cancerous stricture 8.
Hypersamia therapy can be performed.

As described above, according to this embodiment, hypersamia therapy can be performed while expanding the cancerous stricture 8 using the biological channel dilator 11 as described above.

Next, a third embodiment of the present invention will be described with reference to FIGS. 7 to 9.

The living body channel dilator 21 of this embodiment is shown in FIGS. 7(a) and 7(b).
) and a rectangular sheet 22 as shown in FIG.
31 consisting of an inner balloon membrane 23 and an outer balloon membrane 24 made of polyethylene or the like! 1 structure is wound into a ring shape as shown in FIG. 8, and both ends are sewn and fixed. That is, as shown in FIGS. 7(a) and 7(b), a rectangular sheet 22 is covered with an inner balloon membrane 2 having approximately the same shape.
3 and the outer balloon membrane 24 at its edge portions 23a, 23
b, 23c, 23d and 24a, 24b, 24
c and 24d are fixed by adhesion or welding, respectively. Furthermore, the inner balloon membrane 23 is removed from the edge portions 23c and 24c.
Pressurizing pipes 25 and 26 are inserted into the space formed by the outer balloon membrane 24 and the seats 1 and 22, respectively, and fixed airtightly. Then, by winding the material shown in FIG. 7 into an annular shape and sewing it together, a living body channel dilator 21 having an inner balloon and an outer balloon is formed. FIG. 9 shows a state in which both balloons of this expansion device 21 are pressurized and expanded. Here, the inner balloon membrane 23 is attached to the seat 22 at an appropriate location (for example, 23e,
By adhering or welding and fixing at 23f), the inflated shape of the inner balloon can be changed arbitrarily.

In the embodiments described above, the biological duct dilator of the present invention is used to dilate a stricture caused by esophageal cancer or esophageal varices. Indicates the state in which it is placed. When dilating a bile duct stricture that occurs in the common bile duct 30 in this way, in addition to the method of inserting a dilator into the stricture site using an endoscope in the same manner as in the above embodiment, there is also a method of inserting a dilator into the stenotic site using a forceps channel of an endoscope. A biological channel dilator suitable for the outer diameter of the catheter to be used may be prepared, and the dilator may be fixed to the catheter and inserted instead of the endoscope. Alternatively, without using an endoscope, a hole for catheter insertion may be made in the body wall, and the dilator may be inserted into the target site using this catheter.

〔effect〕

As described above, according to the present invention, the balloon can be easily inserted into the body, the balloon can be reliably positioned at the target site, and the endoscope can be easily removed from the body after the balloon is expanded. Therefore, the burden on the patient can be minimized.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the biological channel dilator according to the first embodiment of the present invention, FIG. 2(a) is a view when the dilator is inserted into a stricture, and FIG. 2(b) is A sectional view taken along line A-A in Fig. 2(a), Fig. 3(a) is a view taken when the same dilator expands a stenosis, and Fig. 3(b) shows B-B in Fig. 3(a). cross section,
Fig. 4(a) is a diagram when the dilator is placed in a stenotic region, Fig. 4(b) is a cross-sectional view taken along line CC in Fig. 4(a), and Fig. 5
The figure shows the state in which the dilator is placed in the esophagus, FIG. 6 is a sectional view showing the biological duct dilator according to the second embodiment of the present invention, and FIG. FIG. 7(b) is a diagram showing each member before forming the biological channel dilator according to Example 3.
is a sectional view taken along line DD in FIG. 7(a), FIGS. 8 and 9 are explanatory diagrams of the operation of the same embodiment, and FIG. 10 is a diagram showing the insertion of the biological duct dilator according to the present invention into the common bile duct. It is a figure showing a state. 1... Biological conduit expander 2... Sheet (thin-walled annular body) 3... Inner balloon (fixing means) 4... Outer balloon 5, 6... Pressurized conduit row 10

Claims (2)

[Claims] (1) A thin annular body, an outer balloon provided outside the annular body, an inner balloon provided inside the annular body, and fluid is supplied to each of the outer balloon and inner balloon independently. The balloon has outer and inner pipes connected to the outer and inner balloons for pressurized expansion, and the outer diameter is expanded by applying pressure to the outer pipe, and the inner diameter is reduced by applying pressure to the inner pipe. Biological channel dilator. (2) an endoscope; a thin annular body having an inner diameter larger than the outer diameter of the insertion portion of the endoscope; and a balloon provided outside the annular body;
a biological conduit dilator having a pressurized conduit connected to the balloon for supplying pressurized fluid to the balloon and inflating the balloon; A biological duct expansion device comprising: fixing means that can be fixed and released remotely;