WO2020040592A1

WO2020040592A1 - Dilator with adjustable diameter

Info

Publication number: WO2020040592A1
Application number: PCT/KR2019/010762
Authority: WO
Inventors: 강경아
Original assignee: 서울대학교병원
Priority date: 2018-08-24
Filing date: 2019-08-23
Publication date: 2020-02-27
Also published as: KR20200022911A; KR102125270B1

Abstract

The present invention relates to a dilator suitable for cervical or anal dilation, comprising: a head part; a volute spring structure; and a rotation means connected to the volute spring structure to rotate the volute spring structure, wherein the volute spring structure increases and decreases in diameter as the length thereof changes through the rotation of the rotation means.

Description

Expander with adjustable diameter

The present invention is a diastolic adjustable dilator, and more particularly, using a volute spring structure whose diameter changes as the length changes through rotation, in particular of the cervical or anus The present invention relates to an expander capable of effectively expanding the diameter without damaging the human body.

The bottom of the uterus leads to the vagina through a narrow cervical catheter. In terms of anatomical structure, the internal diameter of the cervix varies greatly depending on age and number of births, but on average is about 30 to 50 mm.

In particular, the diameter is too small to allow the uterus to be emptied to terminate pregnancy, or to insert various medical procedures into the uterus to remove abnormal stacks of the uterine wall.

In a conventional method, using structures having different diameters, a structure that fits the size of the cervical catheter of the patient is inserted into the cervical catheter of the patient, the structure is removed after a predetermined time, and the structure of the next size is removed. As a method of insertion, a method of sequentially expanding the cervical catheter of a patient is often used.

However, the patient's condition is required to continuously exchange these structures, one by one, individually by the physician and the nurse, and the patient's condition is typically manufactured by a specific number of standard sizes rather than continuous diameters. As a result, there is a difficult problem of continuous expansion of the cervix.

Therefore, there is a great need for the design of an apparatus or method that can effectively expand the cervical catheter without damaging the cervical catheter.

For reference, for example, as shown in FIG. 10, the apparatus 1000 shown in Patent Document 1 (US Patent Application Publication No. 2017/0014161) is a vagina expander, which is a flexible structure ( The method of inserting 1001) using the handle 1002 is used. However, since the size of the flexible structure 1001 is also standardized, such a device 1000 cannot perform continuous vaginal expansion and is not suitable for cervical catheterization or anal expansion.

In addition, as shown in FIG. 11, the apparatus 2000 shown in Patent Document 2 (US Patent No. 9492197) is also a vaginal dilator, and the structure 2001 is moved inside the vagina through the rotation of the handle 2002. It uses a mechanical expansion method. However, such a device 2000 cannot control the depth inside the vagina, and because mechanical expansion is made, it is highly likely to cause injury to tissues inside the vagina and is not suitable for cervical catheterization or anal expansion.

In order to solve the problems of the above-mentioned prior arts, the present invention is to reduce the user's hassle as a body, to adjust the size of the diameter in a continuous unit, in particular to provide a dilator suitable for cervical catheter or anal expansion do.

In addition, the present invention is possible to adjust the size of the diameter in a continuous unit in the inserted state, there is no need for re-insertion of the dilator, thereby reducing the damage of internal tissue that may occur during the expansion process, especially the cervix It is intended to provide a dilator suitable for catheterization or anal expansion.

In addition, the present invention is possible to adjust the size of the diameter in a continuous unit in the state inserted therein, there is no need for re-insertion of the dilator, which is particularly suitable for cervical catheter or anus to block the possibility of infection due to replacement To provide.

In order to achieve the above technical problem, the present invention is an expander, head portion; Volute spring structures; And rotation means connected to the volute spring structure to rotate the structure, wherein the volute spring structure can be increased or decreased in diameter while the length thereof is changed through the rotation of the rotation means.

The dilators of the present invention can be used for dilation of the anus as well as the cervical catheter. Specifically, the expansion of the anus is involved with the internal sphincter and external sphincter of the anus, the muscle shape of the anus being annular like the cervical catheter. In addition, since the internal diameter of the anal canal is also 40 mm, similar to the average internal diameter of the cervix, the dilator of the present invention can also be used for dilation of the anus.

That is, since both the cervical catheter and the anal canal have an anatomically closed structure, the above-described dilator of the present invention reduces the damage to the internal tissues of the cervical canal and the anal canal, and at the same time, the cervical canal and the anal canal. Can be expanded gradually.

Therefore, the dilator of the present invention can be effectively used in the solid muscle tissue of the annular structure, and therefore it is preferably used for the expansion of the cervical catheter and anus rather than the vaginal expansion.

In addition, the head portion of the present invention may have a parabolic shape in the advancing direction of the expander.

In addition, the expander of the present invention further includes a cover for covering the volute spring structure, the cover may be made of an elastic material that can be in contact with the human body, and can be modified in response to the shape deformation of the volute spring structure.

In addition, the volute spring structure of the present invention, the volute spring; And a central shaft fixedly coupled to the inside of the volute spring; It may include a support for supporting one end of the volute spring in the direction opposite the direction of travel of the dilator.

In addition, the rotation means of the present invention supports a support portion; A drive shaft to which the central axis is inserted and coupled; And a handle portion protruding from the outside of the drive shaft, and as the rotation means rotates, the central axis of the volute spring structure rotates to rotate the volute spring structure.

In addition, the rotation means of the present invention further includes a coupling portion for preventing the support portion from falling off from the support portion, the support portion and the support portion may be supported to slide with each other.

In addition, a threaded portion is formed on the outer circumference of the central shaft of the volute spring structure of the present invention, and a corresponding threaded portion corresponding to the threaded portion is formed on the inner circumference of the drive shaft, and can be coupled to each other.

In addition, the central axis of the present invention may further include a display means for indicating the degree of winding and unwinding of the volute spring structure, the display means may be a scale or shade.

According to the present invention, it is possible to continuously increase the size in one dilator, it is possible to significantly reduce the inconvenience and the possibility of infection by using the dilator one by size as in the conventional cervical catheter or anal expansion.

In addition, since the present invention does not require replacement of sized individual expanders, the possibility of reinsertion of the instrument and consequent damage to tissue can be significantly reduced.

1 is a perspective view schematically showing an expander according to an embodiment of the present invention.

Figure 2 schematically shows an exploded perspective view of the expander according to an embodiment of the present invention.

3 is a schematic diagram schematically showing that the spring structure is compressed according to the rotation of the handle of the expander according to one embodiment of the present invention.

4 is a schematic diagram schematically showing a cross section of part A of FIG.

5 is a graph showing the force required according to the change in the cross section and the diameter of the spring structure according to the embodiment of the present invention.

6A and 6B are schematic diagrams showing shapes during compression according to the type of spring structure.

7 is a schematic diagram schematically showing that a spring structure is covered with a cover according to an embodiment of the present invention.

FIG. 8 is a schematic diagram schematically illustrating the insertion of an dilator according to one embodiment of the present invention into the cervical catheter. FIG.

9 is a schematic diagram schematically showing that the cervical catheter is expanded while the spring structure is compressed after inserting the dilator according to the embodiment of the present invention into the cervical catheter.

10 schematically shows a conventional vaginal expander according to Patent Document 1. FIG.

11 schematically shows a conventional vaginal expander according to Patent Document 2.

Hereinafter, an expander according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In the various embodiments, components having the same configuration will be typically described in one embodiment using the same reference numerals, and in other embodiments, only other components will be described.

1 is a perspective view schematically showing an dilator 1 according to an embodiment of the present invention.

As described above, the dilator 1 of the present invention may be applied to the anus as well as the cervical catheter, and in one embodiment below, the cervical catheter dilator will be described as an example.

As shown in FIG. 1, the dilator 1 according to an embodiment of the present invention includes a head portion 30, a volute spring structure 10, and a rotation means 20 for rotating the spring structure. The spring structure 10 may be increased or decreased in diameter while the length is changed through the rotation of the rotating means.

In addition, the shape of the head portion 30 has a parabolic curved shape, it is possible to prevent tissue damage inside the catheter when inserted into the cervical catheter.

In addition, the spring structure 10 and the head portion 30, preferably using a silicon material, can easily clean the dilator 10 while preventing damage to the inside of the cervical catheter.

FIG. 2 schematically shows an exploded perspective view of the expander 1 according to an embodiment of the present invention, and FIG. 3 shows that the spring structure 10 is compressed as the handle 23 of the expander 1 rotates. It is a schematic diagram schematically showing the thing. 4 is a schematic diagram schematically showing a cross section of part A of FIG.

As shown in Figure 2, the spring structure 10 of the present invention uses a volute spring 11, the volute spring is a spring wound in a conical shape of a plate-shaped material of a generally rectangular cross section. Such a volute spring structure has a characteristic that the spring constant gradually increases when the curvature increases more than a certain level, and can be used as a shock absorbing spring that can receive a large load in a relatively small shape. The diameter, load, and compression shape of the volute spring will be described later.

The volute spring 11 of the spring structure 10 is fixedly coupled to the central axis 12. The central shaft 12 is fitted into the coupling hole 24 of the rotating means 20 for rotating the spring structure 10 is coupled.

Moreover, the display means 14 which can display the winding-up and unwinding degree of the volute spring 11 is formed in the lower end of the center axis | shaft 12. In one Embodiment of this invention, in the display means 14, The scale is displayed, and the deeper the shade is displayed in the cervical catheter, the deeper the shade of the display means 14 can be easily performed by simply checking the shade of the display means 14.

As shown in FIG. 3, the volute spring 11 is coupled to the support 15 at the lower side, and the support 15 is supported at the upper side of the support 21 of the rotating means 20. The support part 15 is prevented from falling out from the support part 21 through the part 22. As shown in FIG.

The support part 15 and the support part 21 are not fixed to each other and are supported by each other so that they can slide, and the support part 15 can move forward and backward together as the rotation means 20 moves.

In order to explain the operation relationship between the spring structure 10 and the rotating means 20, referring to Figure 4, the central axis 12 of the spring structure 10 is fitted into the engaging hole 24 of the rotating means 20 Combining As shown in FIG. 4, the threaded portion 13 of the central shaft 12 is engaged with the corresponding threaded portion 26 formed inside the drive shaft 25, even when the user stops rotating the handle 23. Through the combination of the threaded portion 13 and the corresponding threaded portion 26, it is possible to prevent expansion again due to the compression reaction force of the spring structure 10.

In addition, if there is no coupling between the central axis 12 and the rotation means 20 according to an embodiment of the present invention, when the user applies a force in the axial direction of the central axis 12, the axis of the user's central axis 12 The compression of the spring structure 10 should be controlled only by the force in the direction.

However, since the present invention couples the central shaft 12 and the rotating means 20 in the form of screwing, the compression of the spring structure 10 can be finely controlled by adjusting the driving speed of the rotating means 20. .

On the other hand, the handle 23 of the rotating means 20 is set larger than the diameter of the support portion 21, it is possible to reduce the force for the user to rotate the rotating means 20.

5 is a graph showing the required force according to the change of the cross section and the diameter of the volute spring structure 10 according to an embodiment of the present invention, Figure 6 is a schematic diagram showing the shape at the time of compression according to the type of the spring structure. .

As shown in FIG. 5, the volute spring 11 changes in diameter D as the spring plates overlap, and as the volute spring 11 is compressed, the load F that can be supported increases. have.

Since the plate thickness of the volute spring 11 should be compressed from the small diameter part, it is preferable that the small diameter part is thinner than the large diameter part, and the thickness of the plate may be preferably 0.3 ± 0.2 mm. have.

In addition, as shown in FIG. 6, in one embodiment of the present invention, when compressed, a small parabolic shape as shown in FIG. 6B is adopted, rather than a conical shape having a straight line as shown in FIG. 6A. In addition, the spring structure 10 can be easily adjusted, and tissue damage due to friction with the inside of the cervix can be minimized.

On the other hand, in one embodiment of the present invention, in the case of using the dilator of the present invention as a cervix dilator, the volute spring 11 supported by the head portion 30 in consideration of the diameter of the cervix duct ) May be 0.3 ± 0.2 cm, the diameter of the volute spring 11 coupled with the support 15 may be 1.2 ± 0.2 cm.

In addition, in another embodiment of the present invention, in the case of using the dilator of the present invention as an anus dilator, in consideration of the diameter of the anus, the diameter of the volute spring 11 supported by the head portion 30 is It may be 2.5 ± 0.5cm, the diameter of the volute spring 11 in conjunction with the support 15 may be 3.0 ± 0.2cm.

7 is a schematic diagram schematically showing the cover 40 on the spring structure 10 according to the embodiment of the present invention. As shown in FIG. 7, through the cover 40, the spring structure 10 can be prevented from coming into direct contact with the interior of the cervical catheter.

In addition, since the cover 40 is in contact with the inside of the cervical catheter, it is preferable to use a silicone material, and it is preferable to use an elastic material so as to cope with the shape deformation of the spring structure 10.

FIG. 8 schematically shows the insertion of the cervical dilator 1 into the cervical catheter according to one embodiment of the invention, and FIG. 9 shows that the cervical catheter is expanded while the spring structure 10 is compressed. It is a schematic diagram shown schematically.

As shown in FIG. 8, the head portion 30 of the cervical dilator 1 is inserted into the cervical conduit, and as shown in FIG. 9, the user moves the handle 23 of the cervical dilator 1. When the force is applied while rotating, the diameter of the cervical dilator 1 is expanded while the volute spring 11 is compressed, so that the cervical catheter of the patient can be continuously finely expanded.

8 and 9 illustrate the insertion of the cervical dilator 1 into the cervical catheter of the patient, but as described above, the cover 40 is inserted to prevent tissue damage and infection inside the cervical catheter. It may be.

With reference to the above description, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features.

Therefore, it should be understood that the above-described embodiments are exemplary in all respects, and are not intended to limit the present invention to the embodiments, and the scope of the present invention is defined by the appended claims rather than the foregoing description. All changes or modifications shown and drawn from the meaning and scope of claims and equivalent concepts should be construed as being included in the scope of the present invention.

[Description of the code]

1 Expander 10 Volute Spring Structure

11 Volute Spring 12 Center Shaft

13 Threaded section 14 Marking means

15 Support 20 Rotating Means

21 Support 22 Coupling

23 Handle 24 Joint

25 drive shaft 26 counterpart

30 Head 40 Cover

The present invention is a diastolic expandable, it is possible to continuously increase the size in one expander, significantly reducing the possibility of discomfort and infection by using one expander by size as in the conventional cervical catheter or anal expansion as the conventional Can be. In addition, since there is no need to replace the sized individual expanders, the possibility of reinsertion of the instrument and consequent damage to tissue can be significantly reduced. Therefore, it may be particularly useful for cervical catheterization or anal dilatation.

Claims

As a dilator,

Head portion; Volute spring structures; And rotation means connected to the volute spring structure to rotate the volute spring structure.

The volute spring structure is characterized in that the diameter is increased or decreased as the length is changed through the rotation of the rotating means.
The method of claim 1,

And the head portion has a parabolic shape in the advancing direction of the expander.
The method of claim 1,

The dilator further comprises a cover covering the volute spring structure,

The cover is a dilator, characterized in that the body made of an elastic material that can be deformed in response to the shape deformation of the volute spring structure.
The method of claim 1,

The volute spring structure includes a volute spring; And a central shaft fixedly coupled to the inside of the volute spring. And a support for supporting one end of the volute spring in a direction opposite to the travel direction of the expander.
The method of claim 4, wherein

The rotating means includes a support for supporting the support; A drive shaft to which the center shaft is inserted and coupled; And a handle part protruding from the outside of the drive shaft.

In accordance with the rotation of the rotating means, the central axis of the volute spring structure rotates to expand the volute spring structure.
The method of claim 5, wherein

The rotating means further includes a coupling portion for preventing the support portion from falling off from the support portion,

And the support and the support are supported to slide with each other.
The method of claim 5, wherein

The outer periphery of the central axis is formed with a screw,

And a corresponding threaded portion corresponding to the threaded portion is formed on an inner circumference of the drive shaft.
The method of claim 5, wherein

And the central axis further comprises display means for indicating a degree of winding and unwinding of the volute spring structure.
The method of claim 8,

And said display means is a scale or shade.
The method of claim 1,

And the dilator is a cervical or anus dilator.