JPH114835A - Uterine opening opener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a uterine-opening opener which has strong action to open a uterine opening although using an inflating member and which provides high sureness and safety. SOLUTION: A uterine-opening opener 1, having a structure in which a plurality of opening/closing arms are arranged around an inflating member, includes a flexible inflating member 2; a fluid injection pipe 3 connected to the inflating member 2; an incorporating body 1a having a holding part 4 formed in the fluid injection pipe 3; and an external capsule body 1b arranged around the inflating member 2 and having a uterine-opening engaging claw 5 at its end, a plurality of opening/closing arms 6 at its middle, and at its base end an engaging part with the holding part 4. The inflating member 2 is formed to be freely expanded or contracted by the injection or discharge of liquid, and during contraction of the inflating member 2 the opening/closing arms 6 contract and close to one another to converge the uterine opening engaging claw 5; during expansion of the inflating member 2, the opening/closing arms 6 open the inflating member 2 wide to open the uterine-opening engaging claw 5, so that the uterine opening is opened by the opening of the uterine opening engaging claw 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a cervical ostomy device. More specifically, the present invention provides for planned delivery, delivery induction,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for expanding a cervix for shortening a parturition time or the like, and relates to a cervix opening device capable of forcibly and safely expanding the cervix.

[0002]

2. Description of the Related Art In recent years, in maternity hospitals, hospitals, and the like, pregnant women near childbirth for various reasons (hereinafter referred to as pregnant women).
It is necessary to control the time period and period of delivery. That is, from a medical point of view, pelvic position, preeclampsia,
In the case of early-stage rupture of water, etc., it is necessary to promptly induce labor, and if labor is weak during labor,
It is necessary to induce labor even when the progress of labor is significantly delayed or when there is no labor after the scheduled date.
Furthermore, depending on the circumstances of the pregnant woman, the circumstances of the doctor, etc., a planned delivery may be performed. Conventionally, as a method of inducing birth in such a case, a method using a drug and a mechanical method have been known (Obstetrics and Gynecology Medical Care Study Group, “Obstetrics and Gynecology Medical Care”, pages 914 to 919, and 974). ~ 97
7 pages, Rokuho Shuppansha, 1979). As a method using a drug, for example, there is a method of instilling a uterine constrictor such as oxytocin, pregrandy into a vein. Various instruments have been used to expand. However, recently,
There is a growing need to perform labor as naturally as possible, and some pregnant women may not like the induction of labor by drugs. For such pregnant women, the mechanical method is expected. Among the mechanical methods, instruments using an inflating member, such as colpoir lingel and metro ilinter, are often used.

[0003] Conventionally, as an instrument using an inflatable member (hereinafter sometimes referred to as an instrument), for example, Japanese Unexamined Patent Publication No. Sho 5
0-131394, JP-A-50-149179, JP-A-55-156714 and JP-A-57-149714.
No. 14804, Japanese Utility Model Publication No. 59-137709,
Japanese Utility Model Application Laid-Open No. 59-137736, Japanese Utility Model Application No. 61-259.
No. 6, JP-A-1-19967 and the like are known. A general mode of using these devices is as follows. First, the cervix is stimulated by hand, and after the cervix has expanded to some extent, an unexpanded inflatable member is inserted, fluid is injected into the inflatable member to inflate, and the uterine ostium is expanded by the expanding force. An example is shown. On the other hand, as a cervical ostomy device that does not use an inflating member, a device disclosed in Japanese Utility Model Registration No. 3029168 is known.

[0004]

However, in general, since the inflatable member has a characteristic of expanding more in the direction of less resistance, in the conventional device, the expanding force of the inflatable member is all in the opening of the cervix. There is a problem that the uterine ostium is not used for opening, and therefore the effect of expanding the cervix is weak. For example, even if the inflation member is inserted into the cervix and inflated by injecting a fluid, the portion other than the portion in contact with the cervix expands greatly, so that the action of expanding the cervix is only weak. Did not. In the technology disclosed in each of the above publications, in order to solve such a problem, various measures such as devising the shape of the expansion member are employed, but none of them is definitive. The problem has not been completely resolved. Therefore, conventional instruments have been used primarily for detaching the egg membrane inside the uterus, rather than for opening the uterine os.
In this respect, the cervical tract opening device described in the above-mentioned registered utility model No. 3029168 expands the uterine os with a special member, and is not reliable with a higher reliability than a conventional device. There was, however, a need for a more effective cervical dilator. An object of the present invention is to provide a cervical tract opening device which has a strong effect of expanding the cervix despite the use of an inflating member, and has high reliability and safety.

[0005]

According to the present invention, there is provided a uterine ostomy device having a structure in which a plurality of opening / closing arms are arranged around an inflatable member. A) a flexible inflatable member, a fluid injection tube connected to the inflatable member, and a built-in body having a holding portion formed in the fluid injecting tube; b) a distal end disposed around the inflatable member; An outer package body having a cervix engaging claw, a plurality of opening / closing arms at an intermediate portion, and an engaging portion with the holding portion at a base end. Are formed so that they can be expanded or contracted by injecting or discharging a liquid. When the expansion member is contracted, the opening and closing arms are closed and closed to each other to converge the cervix engaging claw, and when the expansion member is expanded, each opening and closing arm is opened and closed. An arm is pushed by the inflating member to open the cervix engaging claw, and the cervical engaging claw is expanded. Cervix expansion device, characterized in that so as to expanded more cervix is. Further, in the present invention, the plurality of opening / closing arms are made of an elastic member, are fixed in a contracted state at the start of use, and each opening / closing arm is in opposition to the elasticity when the expansion member is inflated. When the expansion member is contracted, each opening / closing arm is restored to a state at the start of use in which each opening / closing arm is elastically closed (hereinafter, referred to as a first mode). Supported by a supporting portion provided on the base end side of the opening / closing arm (hereinafter, referred to as the opening / closing arm).
This will be described as a second embodiment. ) Are preferred embodiments.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention for solving the above-mentioned problems will be described in detail. Elements of the present invention will be described in order to facilitate correspondence with the elements of the embodiments described later. Are added in parentheses. The reason why the present invention is described in correspondence with reference numerals of the following embodiments is to facilitate understanding of the present invention, and not to limit the technical scope of the present invention to the embodiments. FIG. 1 is a partial sectional view showing the inside of one embodiment of the present invention, FIG. 2 is a perspective view showing the appearance of one embodiment of the present invention, and FIG. 3 is one embodiment of the present invention. 5 is a schematic view showing the operation of the present invention. FIG. 4 is a schematic external view of another embodiment of the present invention. As illustrated in FIGS. 1 and 4, the cervical dilatation device (1, 10) of the present invention includes a built-in body (1 a, 10 a) and an outer package (1 b, 10 b).

[0007] The built-in body (1a, 10a) includes an inflatable expansion member (2, 12).
A fluid injection pipe (3, 13) is connected to 2). For example, holding parts (4, 14) are formed integrally with the fluid injection pipes (3, 13), and a diaphragm or the like is provided at the base end thereof. It is not something to be done. The fluid injection pipes (3, 13) may be made of any material and shape as long as the fluid can be pumped, but is preferably a rod having a hollow inside.
Although there is no particular limitation on the shape, a cylindrical or elliptical cylinder having a smooth surface is desirable in consideration of insertion into the vagina. Furthermore, if a bending member that can be bent freely, for example, a flexible hose, is used, it can be bent according to the shape of the vagina, so that the insertion becomes easy, which is more desirable. As another embodiment of the fluid injection pipes (3, 13), the fluid injection pipes (3, 13) may be formed of a flexible hose. In that case, however, the hose itself is used as a long member. Fixed,
What is necessary is just to insert this long member in a vagina. Fluid injection tube (3,
In 13), there is no particular limitation on the material, but a material considering hygiene is preferable. For example, a material that can be sterilized with an alcohol or the like and a material that can be sterilized with an autoclave or the like are desirable. It is desirable that a fluid injection means (not shown) is connected to the base end of the fluid injection pipes (3, 13).
Fluid injection means can be appropriately selected according to the fluid used,
Examples of the fluid include liquids such as water and diluted alcohol, as well as gases such as air and nitrogen gas.While safety and simplicity are considered, water is most desirable. Examples of the fluid injecting unit include a hydraulic pump and a conductive pump. Note that the fluid injection means may be a separate syringe. The inflatable members (2, 12) are expanded by injection of a fluid, and there is no particular limitation on the material of the inflatable members (2, 12), but the material can withstand repeated use, and can be sterilized or sterilized. Certain materials, hygienic materials are desirable,
The material used in the conventional device, for example, rubber or the like can be used. Expansion member (2, 12)
Can be contracted by discharging the fluid, but the discharge pipe for discharging the fluid is connected to the fluid injection pipe (3, 1).
It may be provided separately from 3). However, if one fluid injection pipe (3, 13) is used for both injection and discharge, the structure is simple and desirable. Holder (4, 1
Reference numeral 4) denotes a member for holding an outer package (1b, 10b) described later, and may have any shape and structure as long as the object is achieved.
According to 4), the outer package (1b, 10b) is disposed around the built-in body (1a, 10a).

[0008] The outer package body (1b, 10b) has a cervix engaging claw (5, 15) at the tip and a plurality of opening / closing arms at the middle.
(6, 16), and the base end is provided with an engaging portion (7, 17) for engaging with the holding portion. The cervix engaging claws (5, 15) are members for engaging with the cervix (101), and desirably have an appropriate curvature matching the shape of the cervix (101). In particular, the cervix (10
It is necessary to consider the shape, material, etc., so as not to damage 1). In addition, the cervix engaging claw (5, 1
5) is preferably formed at the tip of the opening / closing arm (6, 16). In this case, one opening / closing arm (6, 1) is provided.
6) A plurality of cervix engaging claws (5, 15) may be formed. The plurality of opening / closing arms (6, 16) are provided with expansion members (2, 2).
12). Plural means that there are two or more. It is desirable to arrange the opening / closing arms (6, 16) at equal intervals around the expansion members (2, 12). It is preferable that the base end of the opening / closing arm (6, 16) is fixed. As described above, when the fluid injection pipe (3, 13) is a flexible hose and fixed to the long member. The opening and closing arm (6, 16) is fixed to a long member, and when the fluid injection pipe (3, 13) is a hard member, the opening and closing arm (6, 16) is connected to the fluid injection pipe ( 3, 1
3) It is desirable to connect and fix to itself, but it is not limited to these modes. Engaging part (7, 17)
Means that the outer package (1b, 10b) is
a) for engaging with the holding portions (4, 1).
4) engage.

In the cervix dilatation device (1, 10) of the present invention constructed as described above, when the inflatable members (2, 12) are contracted, the opening / closing arms (6, 16) are opened. The uterine ostium engaging claws (5, 15) formed at the distal ends of the outer packet bodies (1b, 10b) are converged. Therefore, in such a converged state, the distal end side of the fluid injection pipe (3, 13), that is, the expansion member (2, 1).
2) and the arm (6, 16) are inserted into the vagina to insert the cervix engaging claw (5, 15) into the cervix (101), and the cervical engaging claw (5, 15) is inserted. It can be engaged with the cervix (101). At this time, the cervix engaging claw (5,
The extent to which 15) converges is that the cervix (1
01) can be inserted as a guide. Next, when the fluid is injected into the expansion members (2, 12) through the fluid injection pipes (3, 13), the expansion members (2, 12) expand. Opening and closing arms (6, 6) arranged around the expansion members (2, 12).
16) is expanded by the expansion of the expansion members (2, 12), and accordingly, the cervix engaging claws (5, 15) formed at the distal ends of the outer envelopes (1b, 10b) are respectively expanded. I do. When the cervix engaging claws (5, 15) are expanded, the cervix (101) engaged with them is also expanded.
Thus, the cervix (101) can be safely and reliably expanded. In this case, it is desirable to expand the cervix engaging claws (5, 15) until the diameter of the cervix (101) becomes at least 6 cm, whereby stable delivery can be performed. .

When the cervical dilatation device (1, 10) of the present invention is compared with a conventional device, the inflating force of the inflation member (2, 12) is not directly applied to the cervix (101). ,
They differ in that they are indirectly applied via opening / closing arms (6, 16). That is, the cervical ostomy device of the present invention (1,
10) transmits the expanding force of the inflating member (2, 12) to the cervix (101) through the opening / closing arm (6, 16), thereby reliably expanding the cervix (101). can do. In addition, the cervical flares of the present invention (1, 10)
In other words, since the expansion members (2, 12) always spread the opening / closing arms (6, 16) with an even force, a part of the opening / closing arms (6, 16) is opened and closed. 6, 16) does not exert excessive force, and even if the cervix (101) is deformed, the opening / closing arms (6, 16) naturally follow the deformation. The uterine ostium (10
1) Can be spread. Therefore, the risk of tissue damage and the like is small, and the safety is high. In the cervix device of the present invention, the opening and closing arms (6, 16) are closed by hand after the expansion member (2, 12) is contracted, so that the cervix engaging claw ( 5, 15) can be converged.

[0011] In another embodiment of the cervix dilatation device of the present invention,
For example, opening and closing arms (6, 16) and expansion members (2, 1).
In a portion where the surface comes into contact with the surface of 2), the two can be adhered with an adhesive or the like. According to this aspect, the opening / closing arm is opened as the expansion members (2, 12) expand.
The arms (6, 16) are expanded and the expansion members (2,
With the contraction of 12), the opening / closing arm (6, 1) is automatically opened.
6) can be closed. As described above, in the cervix dilator, the inflatable member (2,
A mechanism for automatically closing and closing the opening / closing arms (6, 16) upon contraction of 12) is provided, and the cervix engaging claws (5, 15) are freely opened or closed by injecting or discharging fluid. For example, an elastic member (18) for closing and closing the opening / closing arms (6, 16) may be separately provided.

The first aspect of the present invention relates to a desirable aspect of the mechanism for freely expanding or contracting the cervix engaging claws (5, 15) by injecting or discharging a fluid. . In the first embodiment, the opening / closing arm (6, 16) is made of an elastic member, is fixed in a closed state, and is disposed around the expansion member (2, 12). The term "has elasticity" refers to bending or bending when a force is applied, but when the force is removed, a state at the start of use (hereinafter, may be described as an original state) .) Means to restore. For example, when the opening / closing arm (6, 16) itself is formed by a rigid member, the base end (6a, 17) of the opening / closing arm (6, 17).
Are connected and fixed in a state having elasticity. In this way, when a force is applied to the opening / closing arm (6, 16), the base end (6a, 17) of the opening / closing arm is bent, and when the force is removed, the original end is opened. It will be restored to the state. When the opening / closing arm (6, 16) itself is made of an elastic material, the base end (6a, 17) of the opening / closing arm may be completely fixed. In this case, when a force is applied to the opening / closing arm (6, 16), the entire opening / closing arm (6, 16) bends, and when the force is removed, the original state is restored. I do.
The opening / closing arms (6, 16) are fixed in a closed state, that is, in a state in which the cervix engaging claws (5, 15) are converged. For this reason, when the expansion members (2, 12) are expanded, the opening / closing arms (6, 16) are pushed out against the elasticity, but when the expansion members (2, 12) are contracted. Restores the original state in which the opening / closing arms (6, 16) are contracted, that is, the cervix engaging claws (5, 15) converge. Therefore,
If the fluid is discharged from the expansion members (1, 12), it can be restored to the state at the start of use.

In the second aspect of the present invention, a support portion (6b) is provided at the base end of the opening / closing arm (6, 16). The supporting portion (6b) is a member that supports and fixes the expansion members (2, 12) and stops the expansion of the expansion members (2, 12). That is, the support portion (6b) is provided with the expansion member (2, 1).
2) has the effect of efficiently transmitting the expanding force to the opening / closing arm (6, 16), and the expansion member (2, 12) is provided only in the direction in which the opening / closing arm (6, 16) exists. It has the function of operating to expand. In other words, the carrier (6
b) blocks the expansion members (2, 12) in an insignificant direction and opens and closes the expansion members (2, 12).
It is a member for expanding in the direction of 6). The place where the supporting portion (6b) is installed may be, for example, integrally formed with the outer package (1b, 10b) as illustrated in FIG. 1, but is not limited to this. Can also be configured. In this case, if the fluid injection pipe (3, 13) is formed of a hard member, it can be installed in the fluid injection pipe (3, 13).
As described above, if the fluid injection pipes (3, 13) are made of a soft hose and fixed to the elongated member, they can be installed on the elongated member. Further, it is preferable that an opening / closing arm (6, 16) is connected to the supporting portion (6b). In this case, the opening / closing arm (6, 16) is attached to the supporting portion (6).
As for the mode of connection to b), it is desirable to fix the opening / closing arms (6, 16) made of an elastic member as in the first mode, and to be capable of bending in two directions. It may be. When the expansion member (2, 12) expands, the expansion of the expansion member (2, 12) is blocked by the supporting portion (6b), and as a result, the opening / closing arm (6, 16).
However, if the opening / closing arm (6, 16) is connected to the supporting portion (6b), the opening / closing arm (6, 16) can be efficiently expanded. it can. That is, the opening / closing arms (6, 16) can be located at the positions where the expansion members (2, 12) expand the most.

After the cervix (101) is appropriately expanded (preferably 6 cm or more) by the cervix dilatation device (1, 10) of the present invention constructed as described above, further using another instrument, The cervix (101) can be further expanded, and various devices for separately progressing labor can be used in combination. As described above, the cervical dilatation device (1, 10) of the present invention is very much expected as an alternative means of promoting delivery by medicine.
Needless to say, it can be used in combination with drugs.

[0015]

Next, the present invention will be described in detail with reference to examples, but the present invention is not limited to the following examples. Embodiment 1 FIG. 1 is a schematic sectional view showing the inside of one embodiment of the present invention, and FIG. 2 is a perspective view showing the appearance of one embodiment of the present invention. In FIG. 1, the cervical ostomy device 1 of the first embodiment includes a flexible tube 3 which is a bendable hollow tube. The base end of the flexible tube 3 is closed by a diaphragm in which soft plastic and rubber are bonded, but illustration of this base end is omitted. The expansion member 2 is connected to the distal end of the flexible tube 3.
The flexible tube 3 has a holding portion 4 formed thereon, and the above-described expansion member 2, flexible tube 3,
The holding body 4 constitutes the internal body 1a of the cervix dilator 1. The outer package 1b of the cervix dilator 1 is formed in a spherical shape as a whole, has a cervix engaging claw 5, an opening / closing arm 6, and an engaging portion 7, and further includes a support portion 6b. In FIG. 2, a plurality of opening / closing arms 6 have a cervix engaging claw 5 formed at the distal end, and a proximal end 6a of the opening / closing arm 6.
Is connected to the carrier 6b. The opening / closing arm 6 can be bent elastically with the base end 6a as a boundary. In FIG. 2, the outer envelope 1b is in the shape of a jar, and is cut from the tip of the jar to the middle part (that is, the base end 6a), and the cut individual pieces are respectively opened and closed arms 6 and The cervix engaging claw 5 is formed. On the other hand, as shown in FIG.
On the base end side of the outer package 1b, there is provided an engaging portion 7 formed integrally with the supporting portion 6b, and the engaging portion 7 is provided with a screw 4a.
By this, it is detachably connected to the holding part 4. That is,
The internal body 1a and the outer package 1b can be separated by the screw 4a. Since the cervix dilator 1 of the first embodiment can be disassembled with the screw 4a, replacement of the expansion member 2, cleaning and sterilization of each part can be easily performed.

Next, the cervical ostomy device 1 having the above-described configuration is provided.
The operation of will be described. FIG. 3 is a schematic diagram showing the operation of one embodiment of the present invention. In FIG. 3A, first, the internal body 1a and the outer package 1b (see FIGS. 1 and 2) are inserted into the vagina, and the cervix engaging claw 5 at the tip is engaged with the cervix 101.
At this time, the expansion member 2 is contracted, the opening / closing arm 6 is contracted, and the cervix engaging claw 5 is converged. Therefore, even when the cervix 101 has a small diameter, the cervix engaging claw 5 can be engaged. In this state, the injection needle is inserted into the diaphragm provided at the base end of the flexible tube 3, and water is injected using the injection needle as a conduit to thereby provide the flexible tube 3 (FIGS. 1 and 2). 2) through the expansion member 2
Inflate. In FIG. 3A, the expansion member 2 expands due to the injection of water, but the base end side of the expansion member 2 (that is, the lower side in FIG. 3) is in contact with the supporting portion 6b, so that the expansion is alienated. You. Therefore, the expansion member 2 expands only in the direction in which the opening / closing arm 6 is pushed and spread (that is, the arrow Y direction).
The opening and closing arm 6 is pushed open with the base end 6a as a boundary by the expansion of the expansion member 2, whereby the cervix engaging claw 5 expands in the direction of arrow X. Accordingly, the narrow cervix 101 is expanded as shown in FIG.

As a method of inflating the inflatable member 2, a method of intermittently inflating the inflatable member 2 by injecting water intermittently is desirable because the burden on the cervix 101 is small. For example, water is injected in advance until immediately before the opening / closing arm 6 starts to open, and in this state, the cervix engaging claw 5 is engaged with the cervix 101 as shown in FIG. Next, the expansion member 2
100 cc of water, and keep the state for a while. After 10 minutes, inject 30-50 cc of water, hold for 5 minutes, and after 5 minutes, inject 30-50 cc of water.
Hold for a minute. By repeating the above operation, the cervix 101 can be expanded little by little. When the cervix 101 is sufficiently widened, the water in the expansion member 2 is drained through the flexible tube 3 (see FIGS. 1 and 2). The expansion member 2 contracts, and the opening / closing arm 6 is restored to the state shown in FIG. After that, the cervical ostomy device 1 is pulled out of the vagina. Before using the cervical ostomy device 1, the cervix 101 is massaged using fingers and the like.
It is desirable that the uterine ostium engaging claw 5 be expanded to such an extent that it can be inserted. As described above, in the cervical ostomy device 1 of the present invention, the force by which the inflation member 2 expands can be used to efficiently expand the cervix 101. In addition, in the cervical ostomy device 1 of FIGS. 1 to 3, since the member to be inserted into the vagina is formed in a spherical shape as a whole, the psychological resistance of the pregnant woman is small,
In addition, since the flexible tube 3 is used, the insertion into the vagina is easy. Also, since it is easy to disassemble, clean, sterilize, etc., it is also excellent in hygiene.

Embodiment 2 FIG. 4 is a schematic external view of another embodiment of the present invention. FIG.
In (a), the cervical ostomy device 10 of the second embodiment uses a wire 16. That is, the expansion member 12 is connected to the tip of the tube 13 and the holding portion 14 is formed.
The tube 13, the inflating member 12, and the holding portion 14 constitute a built-in body 10 a of the cervix dilator 10. A wire 16 having a cervix engaging claw 15 at the tip is connected to the holding portion 14 at an engaging portion 17. The engaging portion 17 is not firmly fixed to the holding portion 14,
The wire 16 is connected in a state where the wire 16 can freely operate with the boundary as a boundary. The outer wrapping body 10b of the cervix dilator 10 of the second embodiment is constituted by the cervix engaging claw 15, the wire 16, and the engaging portion 17 described above. In addition, the cervical ostomy device 10 of the second embodiment does not include a supporting portion that supports the inflating member 12. In FIG. 4A, when the inflation member 12 is inflated, the wire 16 is pushed and spread with the engaging portion 17 as a boundary, so that the cervix engaging claw 15 formed at the tip of the wire 16 is expanded. The same effect as that of the cervical ostomy device 1 of the first embodiment can be obtained. In this case, at the contact point between the expansion member 12 and the wire 16, the expansion member 12
When the expansion member 12 is contracted, the wire 16 can be automatically contracted and closed according to the contraction if the expansion member 12 is contracted.

Embodiment 3 FIG. 4A shows a modified cervix 10 of the second embodiment. In FIG. 4A, wire 1
6 are each provided with a recess 16c. A rubber band 18 is fitted into the concave portion 16c. The rubber band 18 is a member that gives an elastic force in a direction in which the wire 16 contracts and closes. Therefore, when the expansion member 12 contracts after the wire 16 is pushed and spread, the rubber rubber 18 can automatically restore the original state. Embodiments 2 and 3 described above have the advantages that the structure is simple and the manufacturing cost is low.

[0020]

The effects of the cervix dilator of the present invention are as follows. (1) Despite the use of the inflating member, the cervical tract opening device of the present invention has a strong force for expanding the cervix and can more efficiently expand the cervix. (2) The opening of the cervix of the present invention transmits the force by which the inflating member expands to the cervix via the arm, so that the cervical opening is high in reliability and safety. (3) The cervical ostomy device of the present invention can be used safely even by a person with low skill. (4) Therefore, the use of the cervix dilator of the present invention can promote the delivery of more pregnant women in hospitals, maternity hospitals, and the like.

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing the inside of an embodiment of the present invention.

FIG. 2 is a perspective view showing an appearance of one embodiment of the present invention.

FIG. 3 is a schematic diagram showing the operation of an embodiment of the present invention.

FIG. 4 is a schematic external view of another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 cervix opening device 1a built-in body 1b outer package 2 inflatable member 3 flexible tube (fluid injection tube) 4 holding section 4a screw 5 cervix engaging claw 6 opening / closing arm 6a base end 6b holding section 7 engaging section Reference Signs List 10 cervix opening device 10a built-in body 10b outer package 11 rubber band 12 inflatable member 13 tube (fluid injection tube) 14 holding unit 15 cervix engaging claw 16 wire (opening / closing arm) 17 engaging unit (base end) 18 rubber band 100 uterus 101 cervix

Claims (3)

[Claims] 1. A cervical ostomy device having a structure in which a plurality of opening / closing arms are arranged around an expansion member, the following a) and b): a) a flexible expansion member, and connected to the expansion member. A body having a fluid infusion tube formed therein and a holding portion formed in the fluid infusion tube, b) being disposed around the inflatable member, having a cervix engaging claw at a distal end portion, and a plurality of at an intermediate portion. An outer package having an opening / closing arm and having an engagement portion with the holding portion at a base end portion, wherein the expansion member is formed so as to be capable of expanding or contracting by injecting or discharging a liquid, When the inflatable member contracts, the opening / closing arms close to each other and converge on the cervix engaging claw, and when the inflatable member is inflated, each opening / closing arm is pushed out by the inflating member to open the cervix. A child, characterized in that the ingrown nail is expanded and the cervix is expanded by expanding the cervix engaging nail Mouth expanding tool. A plurality of opening / closing arms are made of an elastic member, and are fixed in a contracted state at the start of use, and each opening / closing arm is pushed against the elasticity when the expansion member is inflated. 2. The cervix device according to claim 1, wherein the opening and closing arms are expanded and contracted by elasticity to return to a state at the start of use when the expansion member is contracted. 3. The cervix opening device according to claim 1, wherein the inflating member is carried by a supporting portion provided on the base end side of the plurality of opening / closing arms.