KR101860906B1 - The guide wire and the flexible catheter having that - Google Patents

Abstract

Provided is a guide wire which comprises: a guide part inserted into a working channel of a soft catheter including a bendable bending part, and having a support part which is provided at a spot corresponding to a position of the bending part when inserted and has a cross-section whose supporting force to support the bending part varies in accordance with a rotation angle; and a grip part which can be gripped and inserted when the guide part is inserted while being rotatable. According to the guide wire and the soft catheter including the same, the support part on the guide wire is positioned on the spot corresponding to the bending part, and a precise steering is possible as supporting force is differently applied depending on the rotation, thereby increasing precision in the operation.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a guidewire and a flexible catheter including the guidewire,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide wire and a flexible catheter including the same, and more particularly, to a guide wire for applying a guide wire for adjusting a steering angle of a soft catheter, Gt; catheter. ≪ / RTI >

A catheter is a tube-like instrument for insertion into a body cavity or organ, usually referred to as a probe. The catheter is made of various materials, sizes and shapes depending on the application. It can be divided into hard catheter and elastic catheter depending on the hardness.

The catheter can insert the optical fiber through the internal working channel and photograph the inside of the body organ or insert a treatment instrument to perform appropriate treatment. At this time, the catheter tip is steered to approach the lesion at an appropriate angle, and a wire or the like is used for steering.

Korean Patent No. 1,331,523 filed by the applicant is disclosed in connection with the aforementioned soft catheter.

However, in the case of such a conventional small-diameter catheter, there is a problem that it is difficult to precisely adjust the angle because a fine angle is controlled by controlling the length of the fine wire.

Korean Patent No. 1,331,523

SUMMARY OF THE INVENTION It is an object of the present invention to provide a guide wire and a flexible catheter including the guide wire for solving the problem that it is difficult to finely control the bending amount of a conventional soft catheter.

As a means for solving the above problems, there is provided a flexible catheter comprising a flexible catheter including a bendable bendable portion, the flexible catheter including a bendable portion having a bendable portion formed at a position corresponding to a bendable portion of the bendable portion, The guide wire may include a guide portion including a support portion having a guide portion, and a grip portion that can be gripped when the guide portion is inserted and can be rotated.

In this case, the gripping portion may include a marker configured to visually recognize a supporting force that varies depending on a rotation angle of the support portion.

The length of the support portion may be shorter than the length of the bending portion so that the support force can be selectively transmitted to the bending portion.

And a bending portion. The insertion portion is provided with a working channel inward. The insertion portion is disposed in the insertion portion. When one end of the insertion portion is fixed to one side of the insertion portion, A manipulation part configured to be able to pull out the direction adjusting wire, and a manipulation part configured to be insertable into the working channel, and configured to support the bending part inside the working channel when bending the bending part and to vary the supporting force according to the rotation angle A soft catheter including a guide wire including a support may be provided. Here, the support portion may be provided at a position corresponding to the bending portion at the insertion position where the guide wire is inserted into the working channel.

Further, the support portion may be configured such that the width of the cross section is smaller than other portions of the guide wire.

The guide wire may further comprise a grip portion configured to grip at one end thereof.

In addition, the supporting portion may include a section in which the supporting force for supporting the supporting portion in the direction perpendicular to the longitudinal direction changes according to the rotating direction, and the supporting force can be exerted in the minimum, maximum, and minimum sizes according to the rotation of 180 degrees.

The guidewire and the flexible catheter including the guide wire according to the present invention have the support part of the guide wire at the position corresponding to the bending part and can apply the supporting force differently according to the rotation so that the precise steering can be performed, have.

1 is a plan view of a catheter according to an embodiment of the present invention.
Figure 2 is a top view of a catheter and guide wire in accordance with an embodiment of the present invention.
3 is an enlarged perspective view and a cross-sectional view of the guide wire.
4 is an operational state diagram of the first embodiment.
5 is a view showing the cross-sectional state of the bending portion according to the operation of the guide wire.
6 is a cross-sectional view of the insert and the support of the guide wire.
7 is an enlarged perspective view and a cross-sectional view of a guide wire according to a second embodiment.

Hereinafter, a guide wire and a soft catheter including the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the embodiments, the names of the respective components may be referred to as other names in the art. However, if there is a functional similarity and an equivalence thereof, the modified structure can be regarded as an equivalent structure. In addition, reference numerals added to respective components are described for convenience of explanation. However, the contents of the drawings in the drawings in which these symbols are described do not limit the respective components to the ranges within the drawings. Likewise, even if the embodiment in which the structure on the drawing is partially modified is employed, it can be regarded as an equivalent structure if there is functional similarity and uniformity. Further, in view of the level of ordinary skill in the art, if it is recognized as a component to be included, a description thereof will be omitted.

FIG. 1 is a plan view of a catheter according to an embodiment of the present invention, and FIG. 2 is a plan view of a catheter and guide wire according to an embodiment of the present invention.

The soft catheter 10 according to the present invention may include an insertion portion 100, an operation portion 200, a direction adjusting wire 300, and a guide wire 400.

The insertion portion 100 is configured to be inserted into a tissue or body cavity. The insertion portion 100 is configured to be elongated in the longitudinal direction so as to be accessible to the body cavity or tissue in the deep portion. The bending portion 110 may be provided at the end of the insertion portion 100, and the bending portion 110 may be made of a material that is more flexible than other portions of the insertion portion 100. The bending portion 110 can be intensively bent according to the adjustment of the direction adjusting wire 300. A plurality of working channels 130 may be formed in the insertion portion 100 in the longitudinal direction. The working channel 130 may be connected to a port of the manipulation unit 200 so that the manipulation unit for manipulating the optical fiber or the lesion site in the body cavity can enter from the manipulation unit 200 to be described later and protrude from the end of the insertion unit 100 have. And a wire channel 140 in which the direction adjusting wire 300 is disposed. Meanwhile, the diameter of the insertion portion 100 may be 3 mm or less so that the insertion portion 100 can be smoothly inserted into the body cavity.

The operation unit 200 is connected to one end of the insertion unit 100, and the operator can perform surgery or diagnosis while grasping the operation unit 200. The operation unit 200 may include a housing, a steering lever 210, and a connection port 220.

The housing forms the overall appearance of the operating portion 200 and is configured in a shape that can be easily grasped by hand. The flexible catheter 10 may be configured to have a somewhat curved shape in the longitudinal direction so as not to slip when the flexible catheter 10 is retracted into and out of the tissue.

A steering lever 210 is provided inside the housing. A part of the lever is protruded to the outside of the housing so that the insertion portion 100 can be bent by the operation in a state where the steering lever 210 is held. The steering lever 210 is rotatably connected to the housing and one side of the steering lever 210 is mounted with a direction adjusting wire 300 so that the steering angle of the insertion portion 100 is changed according to the amount of rotation of the steering lever 210, Is determined. At this time, the limit value of the operation of the steering lever 210 can be variously configured corresponding to the length of the bending portion of the insertion portion 100. However, since the configuration of the steering lever 210 can be made in various mechanical configurations including the cam structure, the detailed description will be omitted.

As described above, the connection port 220 is connected to the working channel 130 so that a treatment instrument or an optical fiber can be inserted. In addition, the connection port 220 is configured to be connectable to an external device so as to supply fluid to the working channel 130 or suck the fluid. At this time, a fastening structure such as a screw thread may be formed outside the connection port 220 for fixing the external device.

The guide wire 400 is configured to be inserted into the working channel 130 to adjust the hardness of the insertion portion 100. The guide wire 400 is inserted into the insertion portion 100 to prevent the bending of the unnecessary portion when steering, and the bending amount of the bending portion 110 can be adjusted. The guide wire 400 may include a fastening structure such as a thread when connected to the connection port 220. Even when the guide wire 400 does not include the fastening structure, the inner surface of the working channel 130 and the outer surface of the guide wire 400 Due to the friction, the fixation can be made with appropriate strength.

3 is an enlarged perspective view and a cross-sectional view of the guide wire 400. FIG. As shown in the figure, the guide wire 400 may include a guide unit 410 and a grip unit 420.

The guiding portion 410 may be inserted into the working channel 130 of the catheter 10 and may have a length that can be inserted into the bending portion 110 side of the insertion portion 100 through the working channel 130 have. The guide part 410 may have a cylindrical shape extending in the longitudinal direction and may include a support part 411 at the end side.

The guiding portion 410 is made of a material having a higher strength than the material of the insertion portion 100 so that when the guiding portion 410 is inserted, the guiding portion 410 supports the bending portion 110 during steering, And is generally formed in a cylindrical shape. The guide portion 410 is configured to prevent undesired bending of the insertion portion 100 except the bending portion 110 when the bending portion 110 of the catheter 10 is steered. The guide part 410 may be made of a material such as a metal having a strength higher than that of the material of the insertion part 100 and may be configured to support the insertion part 100.

The support portion 411 may be formed in a shape in which a part of the guide portion 410 is cut to reduce the cross-sectional area. The support portion 411 may be configured to be disposed at a position corresponding to the insertion portion 100 of the catheter 10 at an insertion position where the guide wire 400 is inserted into the working channel 130. [ Therefore, the support portion 411 may be disposed on the end side of the guide portion 410.

3 (b) is a cross-sectional view taken along line I-I 'of Fig. 3 (a). As shown in the figure, in this embodiment, the cross-sectional shape of the support portion 411 is vertically symmetrical, and the upper and lower sides of the support portion 411 are flat and parallel to each other.

When the bending portion 110 is bent in a state where the guide wire 400 is inserted, an external force acts on the support portion 411 in a direction perpendicular to the insertion direction of the guide portion 410. As a result, the support portion 411 is also bent, and at this time, the element having the greatest effect on the support force becomes the second moment based on the axis perpendicular to the external force. That is, the force acting on the bending part 110 by the support part 411 dominantly affects the second moment. Therefore, a part of the supporting portion 411 is cut so that the second moments may be changed according to the rotation angle, and the shape of the cross section may not be rotationally symmetrical. Therefore, the bending moment may vary depending on the direction of the second moment, and the supporting force may be D1 <D2 <D3. The second moment of the support portion 411 has a symmetrical value with reference to 180 degrees as the guide wire 400 rotates.

The grip portion 420 may be configured to allow the user to grip the guide portion and to insert the guide portion into the working channel 130 and to fix the guide portion to the connection port 220. The gripper 420 may include a marker 430 that is rotatable when the guide unit 410 is inserted into the working channel 130 so that the angle can be changed, . At this time, the thickness of the shape of the marker 430 may be changed according to the angle corresponding to the supporting force.

Referring to the marker 430 provided in the gripper 420 shown in FIG. 3 (c), the above-described bearing force can be visually and intuitively recognized. At the 180-degree intervals, the part with the greatest bearing capacity and the smallest part appear symmetrically.

The marker 430 can grasp the bearing force transmitted through the guide wire 400 intuitively. That is, the marking value at the point corresponding to the angle of the indicator 220 of the catheter 10, provides information about the bearing capacity. The marker 430 is configured to recognize the size of the marker 430 in a radial direction according to the rotation angle. The marker 430 may be thicker as the bearing force of the marker 430 is greater.

Hereinafter, the steering of the catheter 10 and the operation of the guide wire 400 will be described in detail with reference to FIGS. 4 and 5. FIG.

FIG. 4 is an operational state view of the first embodiment, and FIG. 5 is a sectional view of the bending portion 110 according to the operation of the guide wire 400,

As shown in the figure, bending is performed at the bending portion 110 of the insertion portion 100. At this time, the amount of bending can be determined by rotating the guide wire 400 so that the amount of bending of the bending part 110 can be adjusted. The bending amount can be adjusted by rotating the guide wire 400 after the steering lever 210 is adjusted. On the contrary, when the guide wire 400 is rotated to fix the support force, the steering lever 210 is operated to perform steering .

5, when the steering lever 210 is operated at the same steering angle?, The operation of the insertion portion 100 according to the rotation of the guide wire 400 is shown.

When the guiding wire 400 is inserted in the direction D3 which has the largest supporting force, the bending part 110 ), And the amount of bending is most reduced. Accordingly, the user can perform the operation by adjusting the insertion angle of the guide wire 400 so as to be converted to an appropriate angle.

Hereinafter, the operation of the bending unit 110 in the case of adjusting the length of the guide wire 400 will be described.

6 is a cross-sectional view of the insertion portion 100 and the support portion 411 of the guide wire 400. FIG. The length of the support portion 411 of the guide wire 400 may be shorter than the length of the bending portion 110 of the catheter 10. Thus, the insertion length of the guide wire 400 can be adjusted to selectively control the point at which the supporting force is transmitted to the bending portion 110.

6A, a portion L1 of the bending portion 110 to be supported by the support portion 411 and a portion L2 to be supported by the guide portion 410 are shown. A portion of the portion L1 supported by the support portion 411 acts to reduce the amount of bending due to a predetermined supporting force and the portion supported by the guide portion 410 receives a strong supporting force so that bending hardly occurs. On the other hand, the shape of the bending portion 110 when the guide wire 400 is not applied is indicated by a chain line on the right side.

6 (b), the guide wire 400 is shown to be less inserted than in the case of FIG. 6 (a), and the guide wire 400 is supported by the support portion 411 and the portion L0 where the guide is not affected The portion L1 supported by the guide portion 410 and the portion L2 supported by the guide portion 410 are shown differently. In this case, the bending amount of the bending portion 110 becomes L0 > L1 > L2. The bend shape is shown on the right side accordingly. In this figure, too, when the guide wire 400 is not applied

6, the length of the supporting portion 411 may be shorter than the length of the bending portion 110 in order to selectively transmit the supporting force selectively to only a part of the bending portion 110 through the guide wire 400, The amount of bending can be adjusted as needed during the process, and the angle of entry of the insertion portion 100 can be appropriately adjusted.

5 and 6, the bending portion 110 of the catheter 10 may be adjusted to have a desired bending angle and a bending amount by simultaneously performing rotation and depth adjustment of the guide wire 400 have.

Hereinafter, a second embodiment according to the present invention will be described in detail with reference to FIG.

In the present embodiment, the same components as those in the above-described embodiment can be included. In order to avoid redundant description, the description will be omitted and only differences will be described.

7 is an enlarged perspective view and a cross-sectional view of the guide wire 400 according to the second embodiment.

As shown in Figs. 7 (a) and 7 (b), the end face of the support portion 411 may be formed in the shape of an eccentric ellipse. In such a configuration, the amount of change in the second-order moment value along the rotation direction can be smaller than that in the first embodiment. Therefore, it is possible to control the bending amount more precisely.

The marker 430 may be provided around the grip portion 420. In this case, the thickness of the marker 430 may be changed according to the angle as shown in FIG. 7 (c) Lt; / RTI &gt;

10: catheter
100:
110: bending portion
130: Working channel
140: wire channel
200:
210: Steering lever
220: Indicator
220: connection port
300: Direction adjusting wire
400: guide wire
410: guide portion
411:
420:
430: Marker

Claims (8)

A supporting portion inserted into a working channel of a soft catheter including a bendable bending portion and having a cross section configured to be provided at a position corresponding to a position of the bending portion at the time of insertion so that a supporting force for supporting the bending portion can be changed according to a rotation angle ;
And a grip portion which is configured to be gripped and inserted when the guide portion is inserted and rotated. The method according to claim 1,
The support portion
Wherein the guide wire is provided at a position corresponding to the bending portion at an insertion position where insertion of the guide wire into the working channel is completed. 3. The method of claim 2,
Wherein the support portion is configured to have a smaller width in cross section than other portions of the guide wire. 3. The method of claim 2,
The gripping portion includes:
And a marker configured to visually recognize a supporting force that varies depending on a rotation angle of the support portion. 3. The method of claim 2,
The length of the support portion
Wherein a length of the bending portion is shorter than a length of the bending portion to selectively transmit the supporting force selectively. 3. The method of claim 2,
Wherein the grip portion is configured to adjust the length of the guide portion inserted into the working channel. 3. The method of claim 2,
The support portion supporting the support portion in a direction perpendicular to the longitudinal direction is changed in accordance with the rotation direction,
And a section in which the support force can be exerted in the minimum, maximum, and minimum sizes according to the rotation of 180 degrees. An insertion portion formed to extend in a longitudinal direction so as to be inserted into a body, the insertion portion including a bending portion and having a working channel inward;
A direction adjusting wire disposed in the insertion portion and having one end fixed to one side of the insertion portion and being bent as the bending portion is pulled;
An operating portion configured to pull out the direction adjusting wire; And
And a support portion configured to be insertable into the working channel and configured to support the bending portion inside the working channel when the bending portion is bent and to vary the supporting force according to the rotation angle.

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