KR102496728B1 - Magnetic catheter - Google Patents

Abstract

A magnetic catheter is disclosed. a first fixed magnet coupled to the front end of the catheter tube; a guide rod having one end engaged with the front end of the catheter tube and the other end protruding forward of the catheter tube by a predetermined length; a body in which an inner space in which the other end of the guide rod is located is formed and a drill tip is provided at the front end; and a first driving magnet coupled to the body along an outer circumferential surface of the body.

Description

Magnetic catheter {Magnetic catheter}

The present invention relates to a magnetic catheter, and more particularly, to a magnetic catheter capable of implementing a collision mechanism for improving tunneling treatment effects.

The magnetic catheter is driven by receiving magnetic torque and magnetic force by an external magnetic field generated by a magnetic drive system, and can be precisely controlled remotely, so it is applied to many parts and research and development are in progress.

Representatively, there is a magnetic catheter applied to cardiac arrhythmia treatment, and in addition, a magnetic catheter for vascular treatment is being developed for vascular treatment. In the case of a magnetic catheter for blood vessel treatment, it is very important to perform a tunneling treatment function in order to penetrate hard clogged blood vessels. Existing magnetic catheters perform tunneling treatment in a way that the drill tip is rotated and pushed by a person outside the body using a hand or a linear slide mechanism.

Such a magnetic catheter has a limitation in that tunneling treatment is not effectively performed because the force does not reach the end of the catheter when the lesion part passes through a complicated blood vessel.

The present invention provides a magnetic catheter capable of effectively removing lesions in coronary tissues of the body.

A magnetic catheter according to the present invention includes a catheter tube; a coupling magnet coupled to the front end of the catheter tube; a guide rod having one end engaged with the front end of the catheter tube and the other end protruding forward of the catheter tube by a predetermined length; a body in which an inner space in which the other end of the guide rod is located is formed and a drill tip is provided at the front end; and a driving magnet coupled to the body along an outer circumferential surface of the body.

In addition, the driving magnet included in the magnetic catheter has a cylindrical shape, and may be divided into an N pole and an S pole based on the central axis of the body.

In addition, the coupling magnet included in the magnetic catheter has a cylindrical shape, and may be divided into an N pole and an S pole based on the central axis of the catheter tube.

In addition, the magnetic catheter may further include a spacer made of a non-magnetic material coupled to the rear end of the body.

In addition, a second inner passage is formed inside the spacer included in the magnetic catheter, the guide rod is inserted into the second inner passage, and the other end of the guide rod has a larger diameter than the second inner passage. can

In addition, the magnetic catheter further includes a fixed magnet located in the inner space, fixedly coupled to the other end of the guide rod, and divided into an N pole and an S pole based on the central axis of the guide rod. Polarities different from those of the coupling magnets may be disposed facing each other.

In addition, the coupling magnet included in the magnetic catheter includes a first magnet layer having a plate shape; and a second magnet layer having a plate-like shape coupled to the first magnet layer and having polarities different from those of the first magnet layer and facing each other.

In addition, the fixed magnet included in the magnetic catheter may include a third magnet layer having a plate shape; and a fourth magnet layer having a plate-like shape coupled to the third magnet layer and disposed facing polarities different from those of the third magnet layer.

In addition, it further includes an auxiliary magnet fixedly coupled to the body in a space between the driving magnet included in the magnetic catheter and the spacer, and having a third inner passage formed therein, wherein the auxiliary magnet is a plate-shaped fifth magnet. Layer; and the sixth magnet layer having a plate-like shape coupled to the fifth magnet layer and disposed facing polarities different from those of the fifth magnet layer.

According to the present invention, the drill tip provided at the front end of the magnetic catheter can move forward and backward while rotating under the control of an external magnetic field, and the lesion can be effectively removed by collision between the drill tip and the lesion.

In addition, according to the present invention, since the drill tip is driven by the control of an external magnetic field, tunneling can be performed effectively even when the magnetic catheter passes through a complicated blood vessel.

1 is a perspective view showing a magnetic catheter according to an embodiment of the present invention.
Figure 2 is a cross-sectional view showing the magnetic catheter of Figure 1;
FIG. 3 is a diagram illustrating a process of driving a magnetic catheter according to the embodiment of FIG. 1 .
4 and 5 are cross-sectional views showing a magnetic catheter according to another embodiment of the present invention.
6 is a view showing a magnetic catheter according to another embodiment of the present invention.
7 is a cross-sectional view of a magnetic catheter according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical spirit of the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete, and the spirit of the present invention will be sufficiently conveyed to those skilled in the art.

In this specification, when an element is referred to as being on another element, it means that it may be directly formed on the other element or a third element may be interposed therebetween. Also, in the drawings, the thicknesses of films and regions are exaggerated for effective explanation of technical content.

In addition, although terms such as first, second, and third are used to describe various elements in various embodiments of the present specification, these elements should not be limited by these terms. These terms are only used to distinguish one component from another. Therefore, what is referred to as a first element in one embodiment may be referred to as a second element in another embodiment. Each embodiment described and illustrated herein also includes its complementary embodiments. In addition, in this specification, 'and/or' is used to mean including at least one of the elements listed before and after.

In the specification, expressions in the singular number include plural expressions unless the context clearly dictates otherwise. In addition, the terms "comprise" or "having" are intended to designate that the features, numbers, steps, components, or combinations thereof described in the specification exist, but one or more other features, numbers, steps, or components. It should not be construed as excluding the possibility of the presence or addition of elements or combinations thereof. In addition, in this specification, "connection" is used to mean both indirectly and directly connecting a plurality of components.

In addition, in the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

1 is a perspective view showing a magnetic catheter according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the magnetic catheter of FIG. 1 .

1 and 2, the magnetic catheter 10 includes a catheter tube 100, a coupling magnet 110, a guide rod 120, a body 200, a driving magnet 220, and a spacer 230. include

The catheter tube 100 has a tube shape having a predetermined length and may be provided with a flexible material capable of being deformed. The catheter tube 100 may be provided in a circular or polygonal cross section perpendicular to the longitudinal direction. The catheter tube 100 is made of a non-magnetic material and is inserted into the tubular tissue.

The coupling magnet 110 is coupled to the front end of the catheter tube 100. The coupling magnet 110 is a cylindrical magnet, and is divided into an N pole and an S pole based on the central axis of the catheter tube 100 .

The guide rod 120 has one end coupled to the front end of the catheter tube 100 and the other end protruding forward of the catheter tube 100 by a predetermined length. One end of the guide rod 120 may be inserted into the inner space of the coupling magnet 110 . The guide rod 120 is provided with a non-magnetic material. The guide rod 120 is inserted into the first inner passage 221 and the second inner passage 231, and the other end is located in the inner space 201. The body of the guide rod 120 has a smaller diameter than the first inner passage 221 and the second inner passage 231, and the other end of the guide rod 120 has a smaller diameter than the second inner passage 231. have a large diameter

The body 200 is located in front of the coupling magnet 110 . The body 200 has a cylindrical shape having a predetermined diameter, and a drill tip 210 is provided at the tip. The body 200 is provided with a non-magnetic material. An inner space 201 is formed inside the body 200 .

The driving magnet 220 is provided along the outer circumferential surface of the body 200 and is fixedly coupled to the body 200 . The driving magnet 220 has a first inner passage 221 formed therein, and may have the same diameter as the body 200 . The driving magnet 220 is a cylindrical magnet, and is divided into an N pole and an S pole based on the central axis of the body 200 .

The spacer 230 has a disk shape having a predetermined thickness and is fixedly coupled to the rear end of the body 200 . The spacer 230 is provided with a non-magnetic material. The diameter of the space 230 may have the same diameter as the diameter of the body 200 . A second inner passage 231 is formed in the spacer 230 . The spacer 230 blocks direct coupling between the driving magnet 220 and the coupling magnet 110 by magnetic force.

FIG. 3 is a diagram illustrating a process of driving a magnetic catheter according to the embodiment of FIG. 1 .

Referring to FIG. 3 , a rotating magnetic field 20 is applied from the outside. The rotating magnetic field 20 rotates around the central axis of the body 200 . In this embodiment, an example in which the rotating magnetic field 20 rotates in a counterclockwise direction will be described. Figure 3 (A) shows the operation process of the magnetic catheter 10 in the course of rotating the rotating magnetic field 20 in the +y-axis direction from the -y-axis direction. 3(B) shows the operation process of the magnetic catheter 10 in the process of rotating the rotating magnetic field 20 from the +y-axis direction to the -y-axis direction.

Referring to (A) of FIG. 3, the driving magnet 220 is aligned in the +y-axis direction along the rotating magnetic field 20, and in this process, the body 200 together with the driving magnet 220 rotate The drive magnets 220 aligned in the +y-axis direction face each other with different polarities from the coupling magnets 110, and an attractive force occurs between the drive magnets 220 and the coupling magnets 110. The body 200 moves in the -x-axis direction along the guide rod 120 by the force of attraction.

Referring to (B) of FIG. 3, the drive magnet 220 is aligned in the -y-axis direction according to the rotating magnetic field 20, and in this process, the body 200 together with the drive magnet 220 rotate - The drive magnets 220 aligned in the y-axis direction face each other with the same polarities as the coupling magnets 110, and a repulsive force is generated between the drive magnets 220 and the coupling magnets 110. The body 200 moves in the +x-axis direction along the guide rod 120 by the repulsive force.

In this way, under the control of the rotating magnetic field 20, the body 200 rotates along the rotating magnetic field 20 and moves linearly in the forward and backward directions along the guide rod 120, and in this process, the body ( The drill tip 210 provided at the front end of 200) may collide with a lesion in a blood vessel. As the rotating magnetic field 20 repeatedly rotates, the drill tip 210 may perform a drilling operation while colliding with the lesion a plurality of times.

4 and 5 are cross-sectional views showing a magnetic catheter according to another embodiment of the present invention.

Referring to FIGS. 4 and 5 , the magnetic catheter 10 further includes a fixed magnet 240 . The fixed magnet 240 is a cylindrical magnet and is located in the inner space 201 . The fixed magnet 240 is coupled to the other end of the guide rod 120 . The fixed magnet 240 is divided into an N pole and an S pole based on the central axis of the guide rod 120 . The fixed magnets 240 are disposed facing each other with polarities different from those of the coupling magnets 110 .

As described in FIG. 3 , when the rotating magnetic field 20 is applied from the outside, the driving magnet 220 and the body 200 rotate along the rotating magnetic field 20 . As the driving magnet 220 rotates, attractive and repulsive forces are generated between the driving magnet 220 and the fixed magnet 240 .

When the driving magnet 220 is disposed as shown in FIG. 4 , an attractive force is generated between the coupling magnet 110 and the driving magnet 220, and a repulsive force is generated between the fixed magnet 240 and the driving magnet 220. Occurs. The repulsive force between the fixed magnet 240 and the driving magnet 220 increases the force of linear movement of the body 200 in the -y-axis direction.

When the driving magnet 220 is disposed as shown in FIG. 5, a repulsive force is generated between the coupling magnet 110 and the driving magnet 220, and an attractive force is generated between the fixed magnet 240 and the driving magnet 220. Occurs. The attractive force between the fixed magnet 240 and the driving magnet 220 increases the force of linear movement of the body 200 in the +y-axis direction.

In this way, by providing the fixed magnet 240, the body 200 moves in the forward and backward directions, so that the drill tip 210 collides with the lesion portion to increase the force.

6 is a view showing a magnetic catheter according to another embodiment of the present invention, and FIG. 7 is a cross-sectional view of the magnetic catheter according to the embodiment of FIG. 6 .

Referring to FIGS. 6 and 7 , the coupling magnet 110 includes a first magnet layer 111 and a second magnet layer 112 .

The first magnet layer 111 has a plate shape. Based on the central axis, it is divided into N pole and S pole.

The second magnet layer 112 has a plate-like shape with the same diameter as the first magnet layer 111, and is divided into an N pole and an S pole based on its central axis. The second magnet layer 112 is fixedly coupled to the first magnet layer 111 and is disposed facing each other with different polarities. The polarity of the second magnet layer 112 has the same area as that of the first magnet layer 111 . Accordingly, the coupled magnet 110 in which the first magnet layer 111 and the second magnet layer 112 are coupled may have a magnetic moment value of 0. In addition, the magnetic field direction of the coupling magnet 110 may be formed in the direction of its central axis by the above structure.

The fixed magnet 240 includes a third magnet layer 241 and a fourth magnet layer 242 .

The third magnet layer 241 has a plate shape. Based on the central axis, it is divided into N pole and S pole.

The fourth magnet layer 242 has a plate shape having the same diameter as the third magnet layer 241, and is divided into an N pole and an S pole based on its central axis. The fourth magnet layer 242 is fixedly coupled to the third magnet layer 241 and is disposed facing each other with different polarities. The polarity of the fourth magnet layer 242 has the same area as that of the third magnet layer 241 . Accordingly, the fixed magnet 240 in which the third magnet layer 241 and the fourth magnet layer 242 are coupled may have a magnetic moment value of 0. In addition, the magnetic field direction of the fixed magnet 240 may be formed in the direction of its central axis by the above structure.

The magnetic catheter 10 further includes an auxiliary magnet 250. The auxiliary magnet 250 is located in a space between the driving magnet 220 and the spacer 230, and a third inner passage 253 is formed therein. The auxiliary magnet 250 includes a fifth magnet layer 251 and a sixth magnet layer 252 .

The fifth magnet layer 251 has a plate shape. Based on the central axis, it is divided into N pole and S pole.

The sixth magnet layer 252 has a plate shape having the same diameter as the fifth magnet layer 251, and is divided into an N pole and an S pole based on its central axis. The sixth magnet layer 252 is fixedly coupled to the fifth magnet layer 251, and polarities different from each other are disposed facing each other. The polarity of the sixth magnet layer 252 has the same area as that of the fifth magnet layer 251 . Accordingly, the auxiliary magnet 250 in which the sixth magnet layer 252 and the fifth magnet layer 251 are coupled may have a magnetic moment value of 0. In addition, the direction of the magnetic field of the auxiliary magnet 250 may be formed in the direction of its central axis by the above structure.

The coupling magnet 110, the driving magnet 220, and the auxiliary magnet 250 are magnetized in the direction of their central axis due to the above-described arrangement of the magnet layers. When the second magnet layer 112 and the fifth magnet layer 251 are disposed to face each other with different polarities, a magnetic field is generated in the direction of the central axis of the guide rod 120 . A force for moving the body 200 toward the catheter tube 100 in the direction of the magnetic field may be further increased.

When the second magnet layer 112 and the fifth magnet layer 251 are disposed to face each other with the same polarities, a magnetic field is generated in the direction of the central axis of the guide rod 120 . A force for moving the body 200 forward of the catheter tube 100 in the direction of the magnetic field may be further increased.

In the above, the present invention has been described in detail using preferred embodiments, but the scope of the present invention is not limited to specific embodiments, and should be interpreted according to the appended claims. In addition, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

10: magnetic catheter
20: rotating magnetic field
100: catheter tube
110: combined magnet 111: first magnet layer 112: second magnet layer
120: guide rod
200: body 201: inner space
210: drill tip
220: drive magnet 221: first inner passage
230: spacer 231: second inner passage
240: fixed magnet 241: third magnet layer 242: fourth magnet layer
250: auxiliary magnet 251: fifth magnet layer 252: sixth magnet layer
253 third inner passage

Claims (9)

catheter tube;
a coupling magnet fixedly coupled to the distal end of the catheter tube and divided into an N pole and an S pole based on the central axis of the catheter tube;
A guide rod provided with a predetermined length, one end coupled to the front end of the catheter tube, and the other end projecting a predetermined length forward of the catheter tube positioned in front of the coupling magnet at a predetermined distance from the coupling magnet;
a body in which an inner space in which the other end of the guide rod is located is formed and a drill tip is provided at the front end; and
Including a driving magnet coupled to the body along the outer circumferential surface of the body and divided into an N pole and an S pole based on the central axis of the body,
When an external rotating magnetic field is applied, the body and the driving magnet rotate integrally about their central axis, and when the driving magnet faces the same polarity as the coupling magnet, a repulsive force is generated and the body moves forward, A magnetic catheter in which an attractive force is generated when polarities face each other so that the body moves toward the coupling magnet.
According to claim 1,
The magnetic catheter wherein the driving magnet has a cylindrical shape.
According to claim 1,
The coupling magnet is a magnetic catheter having a cylindrical shape.
According to claim 1,
A magnetic catheter further comprising a spacer made of a non-magnetic material coupled to the rear end of the body.
According to claim 4,
A second inner passage is formed inside the spacer,
The magnetic catheter of claim 1 , wherein the guide rod is inserted into the second inner passage, and the other end of the guide rod has a larger diameter than the second inner passage.
According to claim 1,
The magnetic catheter
Further comprising a fixed magnet located in the inner space, fixedly coupled to the other end of the guide rod, and divided into N pole and S pole based on the central axis of the guide rod,
The magnetic catheter wherein the fixed magnets are disposed facing each other with polarities different from those of the coupling magnets.
According to claim 1,
The bonding magnet is
A first magnet layer in the form of a plate; and
A magnetic catheter comprising a second magnet layer in the form of a plate coupled to the first magnet layer and having a polarity different from that of the first magnet layer and facing each other.
According to claim 6,
The fixed magnet is
a third magnet layer in the form of a plate; and
A magnetic catheter comprising a fourth magnet layer in the form of a plate coupled to the third magnet layer and disposed facing polarities different from those of the third magnet layer.
According to claim 4,
Further comprising an auxiliary magnet fixedly coupled to the body in a space between the driving magnet and the spacer and having a third inner passage formed therein,
The auxiliary magnet is
a fifth magnet layer in the form of a plate; and
A magnetic catheter comprising a sixth magnet layer in the form of a plate coupled to the fifth magnet layer and disposed facing polarities different from those of the fifth magnet layer.

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