KR20200035798A - Medical catheter - Google Patents

Abstract

Provided is a medical catheter which can maintain a continuous blood flow during surgery and can be size-controlled with precision to match the diameter of a blood vessel. The medical catheter is a medical catheter adapted to be inserted into a blood vessel and comprises: a catheter main body; a shape-changeable member which is disposed outside the catheter main body and is shape-changeable to a first shape and a second shape; an operation member which causes the shape of the shape-changeable member to change; and a manipulation member which operates the operation member by user manipulation, wherein a maximum width value of the shape-changeable member in the second shape is greater than a maximum width value of the shape-changeable member in the first shape, and a hollow space in which blood flows in an axial direction of the catheter main body is formed in at least a part of the space between the catheter main body and the shape-changeable member.

Description

Medical catheter {MEDICAL CATHETER}

The present invention relates to a medical catheter used in angioplasty and transcatheter aortic valve replacement (TAVR).

Conventionally, in order to treat vascular diseases such as vascular stenosis and aortic stenosis, the chest and the like were incised (open chest,,), and surgery was performed. However, such thoracotomy surgery has a disadvantage in that the burden on the elderly is high, and the risk is high even in patients with poor functions of the lung, kidney, heart, and brain.

Therefore, recently, research has been actively conducted on angioplasty and transcatheter aortic valve replacement (TAVR), in which a procedure is performed by inserting a catheter into a target point of a blood vessel instead of incising the chest. .

Percutaneous aortic valve replacement, as shown in Figure 1, using a catheter body (10), balloon 20 and a medical catheter (1) consisting of an artificial valve (30, artificial valve), artificial valve 30 To the target point of the blood vessel (see (1) in FIG. 1)) and inflate the balloon 20 to bring the artificial valve 30 into close contact with the aortic valve (see (2) in FIG. 1), and to expand the balloon 20. By contracting again, the artificial valve 30 is separated from the balloon 20 (see (3) in FIG. 1) and the catheter body 10 is withdrawn from the blood vessel (see (4) in FIG. 1), to the target point of the blood vessel. The artificial valve 30 is seated.

However, in the general balloon type medical catheter 1, the blood vessel (aorta) is closed for a certain time due to the expansion of the balloon 20 in the process of fixing the artificial valve 30 to the target point (the flow of blood flow is interrupted). There is a problem that the patient's biological state cannot be stably maintained and the procedure cannot be performed while observing a blood vessel image image by angiography.

Furthermore, since the size of the general balloon type medical catheter 1 is adjusted by the pneumatic expansion of the balloon 20 during the procedure, the medical catheter 1 cannot be precisely controlled according to the diameter of the blood vessel (aorta). there is a problem.

Republic of Korea Patent Publication No. 10-2015-0054137, 2015.05.20 published

The problem to be solved by the present invention is to provide a medical catheter capable of continuously maintaining the flow of blood flow during the procedure and precisely controlling the size according to the diameter of the blood vessel.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

Medical catheter of the present invention for solving the above problems is a medical catheter inserted into a blood vessel, the catheter body; A shape deforming member disposed outside the catheter body and deformed into a first shape and a second shape; A driving member that deforms the shape of the shape deforming member; And an operation member for driving the drive member by a user's manipulation, wherein the shape-deforming member has a maximum width of the second shape greater than a maximum width of the first shape, and the catheter body and the shape. A hollow space through which blood flows in the axial direction of the catheter body may be formed at least partially between the deforming members.

The medical catheter may be used for transcatheter aortic valve replacement (TAVR) or angioplasty.

An artificial valve is disposed on an outer surface of the shape-deforming member, and the artificial valve is positioned at a target point of a blood vessel in a state in which the shape-deforming member is in the first shape and a blood vessel in a state in which the shape-deforming member is in the second shape. It is possible to sequentially perform close contact with a target point and separating from the shape deforming member in a state where the shape deforming member is in the first shape.

The driving member may include a plurality of driving units, one side of which is coupled to the catheter body and the other side of which is coupled to the shape deforming member.

Each of the plurality of driving units may be foldably coupled to the catheter body.

Each of the plurality of driving units may be pivotally driven such that a rotational axis is formed in a direction perpendicular to the axial direction of the catheter body or pivotally driven such that a rotational axis is formed in an axial direction of the catheter body.

Each of the plurality of driving parts may include a fixing part fixedly coupled to the catheter body and an extension part capable of slidingly driving the fixing part.

Each of the plurality of driving units may be at least partially curved or bent.

The shape-deforming member has a twist in the first shape, and at least a part of the twist in the second shape can be released.

The driving member is rotated around the axis of the catheter body, and includes a rotating part connected to the shape-deforming subsidiary, and by rotation of the rotating part, the shape-deforming member is deformed from a first shape to a second shape or a second shape. It can be transformed from a shape to a first shape.

The medical catheter of the present invention can form a hollow space through which blood flows between the catheter body and the shape deforming member since the shape deforming member is expanded by mechanical driving (not expansion due to pneumatic) of the driving member. Therefore, the medical catheter of the present invention can maintain blood flow even in the "extended state (second state of the shape deforming member)".

Furthermore, the medical catheter of the present invention can precisely control the size of the shape deforming member (the size of the expanded state) according to the diameter of the blood vessel by mechanical driving of the driving member (not expansion due to pneumatic pressure), thereby improving the procedure result I can do it.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a conceptual view showing a procedure for aortic valve replacement using a general medical catheter.
2 and 3 is a conceptual diagram showing that the medical catheter of the first embodiment of the present invention operates.
4 and 5 are conceptual views illustrating a case in which a plurality of driving units have a curved or bent shape in the medical catheter according to the first embodiment of the present invention.
6 is a conceptual diagram showing that the medical catheter according to the second embodiment of the present invention operates.
7 is a conceptual diagram illustrating a case in which a plurality of driving units are curved or bent in a medical catheter according to a second embodiment of the present invention.
8 is a conceptual view showing that the medical catheter according to the third embodiment of the present invention operates.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only the present embodiments allow the disclosure of the present invention to be complete, and are common in the technical field to which the present invention pertains. It is provided to fully inform the skilled person of the scope of the present invention, and the present invention is only defined by the scope of the claims.

The terminology used herein is for describing the embodiments and is not intended to limit the present invention. In this specification, the singular form also includes the plural form unless otherwise specified in the phrase. As used herein, “comprises” and / or “comprising” does not exclude the presence or addition of one or more other components other than the components mentioned. Throughout the specification, the same reference numerals refer to the same components, and “and / or” includes each and every combination of one or more of the mentioned components. Although "first", "second", etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are only used to distinguish one component from another component. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings commonly understood by those skilled in the art to which the present invention pertains. In addition, terms defined in the commonly used dictionary are not ideally or excessively interpreted unless explicitly defined.

The spatially relative terms "below", "beneath", "lower", "above", "upper", etc., are as shown in the figure. It can be used to easily describe a correlation between a component and other components. The spatially relative terms should be understood as terms including different directions of components in use or operation in addition to the directions shown in the drawings. For example, if a component shown in the drawing is flipped over, the component described as "below" or "beneath" the other component will be placed "above" the other component. You can. Thus, the exemplary term “below” can include both the directions below and above. Components can also be oriented in different directions, and thus spatially relative terms can be interpreted according to orientation.

[First Embodiment]

Hereinafter, the medical catheter 100 of the first embodiment of the present invention will be described with reference to FIGS. 2 to 5. The medical catheter 100 of the first embodiment may be inserted into a blood vessel and used to treat various vascular diseases. For example, the medical catheter 100 of the first embodiment may be used for transcatheter aortic valve replacement (TAVR).

However, the use of the medical catheter 100 of the first embodiment is not limited thereto. That is, the medical catheter 100 of the first embodiment can be used in various procedures for treating vascular diseases. As an example, the medical catheter 100 of the first embodiment may be used for angioplasty procedure to treat hypertension or stroke due to stenosis of blood vessels.

Hereinafter, in the description of the medical catheter 100 of the first embodiment, the case used in transcatheter aortic valve replacement (TAVR) will be described as an example, but as described above, the medical catheter of the present invention ( It should be noted that the use of 100) is not limited to this.

The medical catheter 100 of the first embodiment may be inserted into a blood vessel (aorta) to transfer the artificial valve v to the target point of the blood vessel, and the artificial valve v may be mounted to the target point of the blood vessel. .

To this end, the medical catheter 100 of the first embodiment is in an "initial state (a state in which the shape deforming member is in the first shape, see (1) in FIG. 2)" and an "in an extended state (a state in which the shape deforming member is in the second shape) , (See (2) of FIG. 2)).

The medical catheter 100 may be inserted into a blood vessel in an "initial state" to transport the artificial valve v, and in the "extended state", the artificial valve v may be placed in close contact with the target point of the blood vessel, and again, the "initial state" Returning to the state ", through the process of separating the artificial valve v and drawing it out from the target point of the blood vessel, the artificial valve v can be seated at the target point of the blood vessel.

The medical catheter 100 of the first embodiment may include a catheter body 110, a shape deforming member 120, a driving member 130 and an operation member (not shown).

The catheter body 110 may be a member that is inserted into a blood vessel and transports an artificial valve v. The catheter body 110 may have an axis in the insertion direction. The catheter body 110 may be formed of an approximately elastic material, and may be filled or hollow.

A shape deforming member 120 may be disposed outside the catheter body 110. In this case, the shape deforming member 120 may be disposed at an end of the catheter body 110 (an end positioned in a direction to be inserted in the axis). Also, the outer lateral surface of the catheter body 100 and the inner lateral surface of the shape deforming member 120 may face each other. In addition, the outer surface of the catheter body 100 and the inner surface of the shape deforming member 120 may be continuously spaced from at least one end to the other end based on the longitudinal direction in at least a portion. As a result, a hollow space s in which blood flows in the axial direction of the catheter body 110 may be formed at least partially between the catheter body 110 and the shape deforming member 120.

Meanwhile, the hollow space s through which blood flows may exist in both the first and second states of the shape deforming member 120, and in the second state of the shape deforming member 120, It can be expanded from the first state. As a result, in the medical catheter 100 of the first embodiment, the blood flow (blood flow) can be maintained in all procedures through the hollow space s through which blood flows.

Furthermore, in the medical catheter 100 of the first embodiment, since blood flow is maintained in all procedures, a contrast medium may be administered to the blood to observe the blood vessel image image by angiography and proceed with the procedure. . As a result, the medical catheter 100 of the first embodiment can be actively used for angioplasty.

A driving member 130 may be disposed on the catheter body 110. In this case, the catheter body 110 may be connected to the shape deforming member 120 by the driving member 130.

The shape deforming member 120 may have a length along the axial direction of the catheter body 100. The shape deforming member 120 may have a hollow tube shape. For example, the shape deforming member 120 may have a hollow cylindrical shape, but is not limited thereto.

The shape deforming member 120 may be a member whose shape is deformed. The shape deforming member 120 may be changed from the first shape to the second shape, and may be changed from the second shape to the first shape. Furthermore, the shape deforming member 120 may be changed in shape by mechanical driving (motion) of the driving member 130. Meanwhile, the meaning that the shape of the shape deforming member 120 is deformed includes not only that the shape of the shape deforming member 120 is deformed, but also that the size is deformed while the shape of the shape deforming member 120 is maintained. It may be a concept (including variations in shape and size, respectively).

When the shape deforming member 120 is in the first shape, the medical catheter 100 has an "initial state", and when the shape deforming member 120 is in the second shape, the medical catheter 100 is in the "extended state". Have

That is, in the state in which the shape deforming member 120 is in the first shape, the catheter body 110 is inserted into the target point of the blood vessel or withdrawn from the target point in the blood vessel, and the shape deforming member 120 is in the second shape in the catheter The body 110 may expand at a target point of the blood vessel to expand the target point of the narrowed blood vessel, and at the same time, the artificial valve v may be seated at the target point of the blood vessel.

To this end, the maximum value of the width (diameter) in the second shape of the shape deforming member 120 may be greater than the maximum value of the width (diameter) in the first shape of the shape deforming member 120 (extended deformation). . In this case, the maximum value of the width (diameter) of the shape deforming member 120 may mean the maximum value among the values of the width (diameter) at each unit point based on the longitudinal direction.

An artificial valve v may be disposed outside the shape deforming member 120. In this case, the outer surface of the shape deforming member 120 and the inner surface of the artificial valve v may face each other and may contact each other. Therefore, the width (diameter) of the artificial valve v may be determined by the width (diameter) of the shape deforming member 120. That is, the width (diameter) of the artificial valve v in the second shape of the shape deforming member 120 may be expanded.

The driving member 130 may be a member that deforms the shape of the shape deforming member 120. Due to the driving (mechanical movement) of the driving member 130, the shape deforming member 120 may have a first shape and a second shape. That is, the shape deforming member 120 may be expanded from the initial shape by the driving of the driving member 130 and then returned to the initial shape.

The driving member 130 may include a plurality of driving parts 131. The plurality of driving units 131 may have one side coupled to the catheter body 110 and the other side coupled to the shape deforming member 120. In addition, the plurality of driving units 131 may be operated by an operation member (not shown) to deform the shape of the shape deforming member 120.

The plurality of driving units 131 may be grouped into a plurality of groups based on the axial phase of the catheter body 110 (grouping into two groups in FIGS. 2 to 5). This is to stably deform the shape of the shape deforming member 120 by forming driving points in each part based on the axial direction of the catheter body 110. Meanwhile, the plurality of driving units 131 belonging to the same group may be arranged in the circumferential direction (circumferential direction) of the catheter body 110.

Each of the plurality of driving units 131 may be coupled to the catheter body 110 in a folding type. Each of the plurality of driving units 131 may have one side coupled to the outer circumferential surface of the catheter body 110 and the other side coupled to the inner circumferential surface of the shape modifying subtitle 120. The shape deforming member 120 may have a first shape while each of the plurality of driving units 131 is folded, and the shape deforming member 120 may have a second shape while each of the plurality of driving units 131 is unfolded. have.

Each of the plurality of driving units 131 may be folded or unfolded by various driving. For example, each of the plurality of driving units 131 may be folded or unfolded by pivot driving, but is not limited thereto.

For example, as illustrated in FIG. 2, each of the plurality of driving units 131 may be pivotally driven such that a rotation axis is formed in a direction substantially perpendicular to the axial direction of the catheter body 110. Alternatively, each of the plurality of driving units 131 may be pivotally driven such that a rotational axis is formed approximately in the axial direction of the catheter body 110, as illustrated in FIG. 3. Each of the plurality of driving units 131 may increase the angle formed with the catheter body 110 as it goes from the folded state to the unfolded state.

Meanwhile, as illustrated in FIGS. 4 and 5, at least a portion of each of the plurality of driving units 131 may be curved or bent. By reducing the radial length of the plurality of driving units 131, the overall size of the medical catheter 100 can be reduced. As a result, it can be actively used for angioplasty with a small diameter.

The operation member (not shown) may be a member that drives the driving member 130 by manipulation of a user (medical staff). The operation member may drive the drive member 130 manually or automatically.

For example, the manipulation member may be a wire connected to the driving member 130. In this case, a plurality of wires may exist, and may be independently connected to each of the plurality of driving units 131 (individual control), or may be independently connected to each of a plurality of groups of the plurality of driving units 131 (group control). The user can fold or unfold the plurality of driving parts 131 by manually pulling or releasing the wire.

On the other hand, the operation member may be controlled by an electric motor that operates wirelessly or wiredly. In this case, the user can pull or loosen the wire by rotating the electric motor using a terminal (eg, a remote control).

Hereinafter, an operation process of the medical catheter 100 of the first embodiment will be described. The medical catheter 100 of the first embodiment may be inserted into a blood vessel while the shape deforming member 120 has the first shape, and guide the artificial valve v to a target point of the blood vessel. As a result, the artificial valve v can be located at the target point of the blood vessel.

Thereafter, the medical catheter 100 of the first embodiment can deform the shape deforming member 120 into a state having a second shape by driving the driving member 130 by the user operating the operating member. As a result, the shape deforming member 120 is expanded, and accordingly, the artificial valve v is also expanded to be in close contact with the target point of the blood vessel.

Thereafter, the medical catheter 100 of the first embodiment may change the shape deforming member 120 back to a state having a first shape by driving the driving member 130 by a user operating the operating member. In this case, by reducing the catheter body 110, the reduced shape deforming member 120 can be separated from the artificial valve v. As a result, the artificial valve v can be separated from the shape deforming member 120 and seated at a target point of the blood vessel.

Meanwhile, a separate driving member (not shown) and an operating member (not shown) separating the shape deforming member 120 and the artificial valve v may be added to the medical catheter 100 of the first embodiment.

[Second Embodiment]

Hereinafter, the medical catheter 200 of the second embodiment of the present invention will be described with reference to FIGS. 6 and 7. Except for the following description, the medical catheter 100 of the first embodiment may be inferred to the medical catheter 200 of the second embodiment. Hereinafter, in describing the medical catheter 200 of the second embodiment, description of a part having substantially the same technical idea as the medical catheter 100 of the first embodiment will be omitted.

The medical catheter 200 of the second embodiment, like the medical catheter 100 of the first embodiment, includes a catheter body 210, a shape deforming member 220, a driving member 230 and an operation member (not shown). You can.

The driving member 230 may include a plurality of driving parts 231. In this case, unlike the plurality of driving units 131 of the first embodiment, the plurality of driving units 231 may be fixed to and coupled to the catheter body 210. In addition, the plurality of driving units 231 may be disposed perpendicular to the central axis of the catheter body 210.

Meanwhile, similar to the plurality of driving units 131 of the first embodiment, the plurality of driving units 231 may be grouped into a plurality of groups based on the axial phase of the catheter body 210 (2 in FIGS. 6 and 7). Grouping into groups of dogs). The plurality of driving units 231 belonging to the same group may be arranged in the circumferential direction (circumferential direction) of the catheter body 210.

Each of the plurality of driving units 231 may be coupled to the catheter body 210 so as to be extended. Each of the plurality of driving units 231 may be coupled to the outer circumferential surface of the catheter body 210 and the other side to the inner circumferential surface of the shape deforming member 220. While each of the plurality of driving units 231 is not extended, the shape deforming member 220 may have a first shape, and while each of the plurality of driving units 231 is extended, the shape deforming member 220 may have a second shape. Can have

Each of the plurality of driving units 231 may be extended by various driving. For example, each of the plurality of driving units 231 may be extended by sliding driving, but is not limited thereto.

For example, as illustrated in FIG. 6, each of the plurality of driving units 231 may include a fixing unit 231-1 and an extension 231-2. The fixing part 231-1 may be a part that is fixedly coupled to the catheter body 210, and the extension part 231-2 may be a part that is slidably coupled with the fixing part 231-1. .

In this case, a guide portion (for example, a rail) and a sliding stroke of the extension portion 231-2 are determined on the inside or outside of the fixing portion 231-1 to guide the sliding driving of the extension portion 231-2. A stopper may be formed.

Meanwhile, as illustrated in FIG. 7, at least a portion of each of the plurality of driving units 231 may be curved or bent, as in the plurality of driving units 131 of the first embodiment.

The operation member (not shown) may be a member that drives the driving member 230 by manipulation of a user (medical staff). The operation member may drive the drive member 230 manually or automatically.

For example, the manipulation member may be a wire connected to the driving member 230. In this case, the wires may exist in plural, and may be independently connected to the extensions 231-2 of each of the plurality of driving units 231 (individual control), or the extensions of each of the plurality of groups of the plurality of driving units 231 ( 231-2) may be independently connected (group control). The user can fold or unfold the extensions 231-2 of each of the plurality of driving units 231 by manually pulling or releasing the wire.

On the other hand, the operation member may be an electric pneumatic pump that operates wirelessly or wired. In this case, the user adjusts the air pressure inside the fixing part 231-1 of each of the plurality of driving parts 231 by using a terminal (for example, a remote controller) or the like, thereby extending each of the plurality of driving parts 231 ( 231-2) can be driven by sliding.

[Example 3]

Hereinafter, the medical catheter 300 of the third embodiment of the present invention will be described with reference to 8. Except for the following description, the medical catheter 100 of the first embodiment may be inferred to the medical catheter 300 of the third embodiment. Hereinafter, in describing the medical catheter 300 of the third embodiment, descriptions of parts having substantially the same technical idea as the medical catheter 100 of the first embodiment will be omitted.

The medical catheter 300 of the third embodiment, like the medical catheter 100 of the first embodiment, includes a catheter body 310, a shape deforming member 320, a driving member 330, and an operating member (not shown). You can.

Like the catheter body 110 of the first embodiment, the catheter body 310 may be inserted into a blood vessel and function to transport the artificial valve v to a target point of the blood vessel.

The shape deforming member 320 may be formed with a torsion at least partially in the first shape. That is, the shape deforming member 320 may be twisted along a three-dimensional spiral by applying a torsional rotation in the first shape. The shape-deforming member 320 may release at least a portion of the twist in the second shape. That is, in the medical catheter 300 of the third embodiment, a twist is formed in the shape deforming member 320 in the "initial state (see (1) of FIG. 8)", and the "extended state (see (2) of FIG. 8)" At least a portion of the twist of the shape deforming member 320 may be released. As a result, the maximum value of the width (diameter) in the first shape of the shape deforming member 320 may be greater than the maximum value of the width (diameter) in the second shape of the shape deforming member 320.

The driving member 330 may be a member that drives the shape deforming member 320. Various members may be used for the driving member 330. For example, the driving member 330 may include a rotating part 331.

The rotating part 331 may rotate based on the axis of the catheter body 310. When the rotating part 331 rotates forward and reverse, the shape deforming member 320 may be deformed from the first shape to the second shape, or may be deformed from the second shape to the first shape.

For example, the rotation part 331 is rotated forward to form a twist in the shape deforming member 320. In this case, the shape deforming member 320 may have a first shape. Conversely, the rotating portion 331 may rotate at least to loosen at least a portion of the twist of the shape deforming member 320. In this case, the shape deforming member 320 may have a second shape.

Furthermore, the rotation unit 331 is rotated at the same time as the rotation relative to the axis of the catheter body 310 to prevent the stress that keeps the shape deformation member 320 tight due to the change in the twist of the shape deformation member 320 Sliding driving is also possible.

Furthermore, the rotating part 331 may include a first rotating body 331-1 and a second rotating body 331-2. The first rotating body 331-1 and the second rotating body 331-2 may be disposed spaced apart from each other in the axial direction of the catheter body 310. In this case, the first rotating body 331-1 and the second rotating body 331-2 may be respectively disposed at one end portion (near portion) and the other end portion (near portion) of the shape deforming member 320. have.

By rotating the first rotating body 331-1 and the second rotating body 331-2 in opposite directions, the shape deforming member 320 is deformed from the first shape to the second shape, or the first from the second shape. It can be transformed into a shape.

For example, the first rotating body 331-1 rotates forward and the second rotating body 331-2 rotates backward, thereby forming a twist in the shape deforming member 320. In this case, the shape deforming member 320 may have a first shape (see (1) in FIG. 8). On the contrary, the first rotating body 331-1 rotates in the reverse direction and the second rotating body 331-2 rotates in the normal direction, so that the distortion of the shape deforming member 320 can be released. In this case, the shape deforming member 320 may have a second shape (see Fig. 8 (2)).

Further, the first rotating body 331-1 and the second rotating body 331-2 are prevented from reducing the stress that keeps the shape-deforming member 320 taut in response to a change in the twist of the shape-deforming member 320. In order to do so, it is possible to rotate and slide at the same time to rotate closer to or further away from each other based on the axis of the catheter body 310.

The operation member (not shown) may be a member that drives the driving member 330. In this case, the operation member may be a shaft connected to the rotating part 331. For example, it may be a first shaft connected to the first rotating body 331-1 and a second shaft connected to the second rotating body 331-2. The user (medical staff) can manually operate the first and second shafts or control them by an electric rotary motor.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but a person skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing its technical spirit or essential features. You will understand. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive.

Claims (10)

As a medical catheter inserted into a blood vessel,
Catheter body;
A shape deforming member disposed outside the catheter body and deformed into a first shape and a second shape;
A driving member that deforms the shape of the shape deforming member; And
It includes an operation member for driving the drive member by the user's operation,
In the shape-deforming member, the maximum value of the width in the second shape is greater than the maximum value in the first shape, and at least a portion between the catheter body and the shape-deforming member has blood in the axial direction of the catheter body. A medical catheter in which a hollow space is formed.
According to claim 1,
The medical catheter is a medical catheter used for transcatheter aortic valve replacement (TAVR) or angioplasty.
According to claim 1,
An artificial valve is disposed on an outer surface of the shape-deforming member, and the artificial valve is positioned at a target point of a blood vessel in a state in which the shape-deforming member is in the first shape and a blood vessel in a state in which the shape-deforming member is in the second shape. A medical catheter that sequentially adheres to a target point and sequentially separates from the shape deforming member in a state where the shape deforming member is in the first shape.
According to claim 1,
The driving member is a medical catheter that includes a plurality of driving portions, one side of which is coupled to the catheter body and the other side of which is coupled to the shape-deforming member.
According to claim 4,
Each of the plurality of driving units is a medical catheter that is foldably coupled to the catheter body.
The method of claim 5,
Each of the plurality of driving units is pivotally driven so that a rotational axis is formed in a direction perpendicular to the axial direction of the catheter body, or a medical catheter that is pivotally driven so that a rotational axis is formed in the axial direction of the catheter body.
According to claim 4,
Each of the plurality of driving parts is a medical catheter including a fixed part fixedly coupled to the catheter body and an extension part slidably coupled with the fixed part.
The method according to any one of claims 5 to 7,
Each of the plurality of driving units is a medical catheter, at least a portion of which is curved or bent.
According to claim 1,
The shape deforming member is a medical catheter in which a twist is formed in the first shape, and at least a part of the twist is released in the second shape.
The method of claim 9,
The drive member rotates with respect to the axis of the catheter body, and includes a rotating part connected to the shape-deforming subtitle,
By rotating the rotating portion, the shape deforming member is a medical catheter that is deformed from a first shape to a second shape or a second shape to a first shape.

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