JPS62102757A - Oviduct closure jig - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a fallopian tube obturator for occluding the fallopian tubes for contraception.

[Conventional technology]

For example, cauterizing the fallopian tubes is known as one method of contraception. However, this contraceptive method has the disadvantage that the surgery is difficult and requires skill on the part of the operator, and that regeneration is completely impossible.

Therefore, in order to solve this problem, we inserted a silicone rubber injection tube into the fallopian tube using a 1A tube, and injected uncured silicone rubber through this injection tube, and then allowed the silicone rubber to harden. The procedure is to occlude the fallopian tubes.

[Problem that the invention seeks to solve]

However, with this method of contraception, unhardened silicone rubber is injected into the fallopian tubes, which takes time to harden, resulting in a long surgery and great pain for the patient. In order to inject it, an Inuyama device is required. Another problem is that when the silicone rubber is removed and recycled, the silicone rubber breaks midway and cannot be recycled.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fallopian tube obturator that can easily and reliably close and regenerate the fallopian tube without using any complicated equipment.

[Means and effects for solving the problems] 1- In order to solve the problems described above, this invention maintains deformation into a thin rod shape by an external force below the glass transition temperature, and expands and deforms above the glass transition temperature. After inserting such an obturator 1 into the fallopian tube 10 in the form of a thin rod, the fallopian tube 10 is occluded by applying heating treatment to expand the oviduct 10. It is possible.

〔Example〕

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

As shown in FIG. 1, numeral 1 in the figure is a fallopian tube obturator according to the present invention, which is formed by a deformable member 2 made of a shape memory polymer. This deformable member 2 has a glass transition temperature (T
g) Above the glass transition temperature, the material exhibits rubber-like elasticity, and below the glass transition temperature, it becomes hard like plastic. While maintaining the deformed form in the state shown in Figure 1 below the glass transition temperature, the temperature is slightly higher than body temperature at 40°C to 45°C.
For example, if it is heated to about 40° C. or higher, it can expand to the state shown in FIG. 2. In addition, numeral 3 in the figure is a retrieval string having one end fixed to the deformable member 2.

By the way, as the material of the shape memory polymer forming the above-mentioned obturator 1, a molded body such as a norbornene polymer is used, and the glass transition temperature Tg is set at 40°C to 45°C (Japanese Patent Application Laid-Open No. 59-1999). -Refer to Publication No. 53528)
.

That is, in order to occlude the fallopian tube using the above obturator 1,
As shown in FIGS. 3 to 5, the obturator 1 is first held at the distal end of the guide tube 8. As shown in FIGS.

This guide tube 8 is inserted into the uterus 9 through a transendoscope, and its tip is pressed against the fallopian tube 10.

Next, after inserting the push rod 11 into the guide tube 8 and pushing the obturator 1 into the fallopian tube 10, a heating probe 12 is inserted into the uterus 9 endoscopically instead of the guide tube 8, Its tip is brought into contact with the obturator and heated. Then, the deformable member 2 constituting the obturator 1 is greatly expanded and deformed from the thin rod shape shown in FIG.
By biting into the tube, the fallopian tube 10 is reliably kept closed.

In this state, the obturator 1 can be removed from the fallopian tube 10 by pulling the string 3 provided on the deformable member 2, or by inserting a treatment tool (not shown) such as a forceps into the uterine tube 10.
The obturator 1 can be grasped and pulled out from the fallopian tube 10 by endoscopically introducing the obturator 1 into the tube.

6 and 7 show a second embodiment of the present invention, in which the deformable member 2 has four movable pieces 15 formed in the shape of a petal, and the periphery of the deformable member 2 is made of biocompatible material such as silicone rubber. The movable pieces 15 expand outward from their free ends when heated, thereby causing their free ends to expand. Since the portion corresponding to bulges out, the fallopian tube 10 can be occluded in the same manner as in the first embodiment.

In addition, in the embodiment of this invention, the obturator 1 is attached to the fallopian tube 10.
Instead of the heating probe 12, hot water may be flowed into the guide tube 8 as a heating means for inserting it into the guide tube 8 and causing it to swell.

〔Effect of the invention〕

As described above, the obturator of the present invention changes the temperature of the deformable member made of shape memory polymer.
Since it changes from a thin rod state to a swollen state, it is possible to reliably occlude the fallopian tube by simply heating the deformable member taken into the fallopian tube, and it is possible to regenerate the fallopian tube. It also has the advantage of being easy to carry out.

[Brief explanation of drawings]

1 to 5 show an embodiment of the present invention;
The figure is a cross-sectional view of the obturator before it is deformed, Figure 2 is a cross-sectional view of the obturator after the deformation, Figure 3 is an explanatory diagram of the surgical state, and Figure 4 is a view of the obturator being installed in the fallopian tube. FIG. 5 is an explanatory diagram of the deformed state after installation, FIG. 6 is a perspective view of the deformable member used in the obturator according to the second embodiment of the present invention, before deformation, and FIG. 7 is the same. It is a perspective view after deformation. 1... Obturator, 2... Deformable member. Applicant's representative Patent attorney Jun Tsuboi Figure 1 Figure zFjA Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1. A fallopian tube obturator characterized by being made of a shape memory polymer that can be deformed into a thin rod shape by an external force at a temperature below the glass transition temperature and expand and deform at a temperature above the glass transition temperature.