KR20140026960A - Tunneling catheter system for ablating vascular chronic total occlusion - Google Patents

Abstract

The present invention relates to a tunneling catheter system for ablating vascular chronic total occlusion, and comprises: a hollow shaped catheter (110) having a hole penetrably formed in a longitudinal direction on a fore-end portion; a tool for ablating lesions (120) provided with a cutting tip (11) which possibly protrudes in a forward direction through the hole and thus moving back and forth in the catheter (110); and a driving means (150) for generating reciprocating motion of the tool for ablating lesions (120) through fluids (141). Compared with a conventional vascular chronic total occlusion ablation using a guide wire, a high skill level of an operator is not required but there is an effect of efficiently ablating stenotic materials in blood vessels.

Description

[0001] The present invention relates to a tunneling catheter system for ablating vascular chronic total occlusion

The present invention relates to a catheter system for tunneling for the removal of chronic stricture lesions.

Generally, chronic complete stenosis occurs when lipid-rich cholesterol is deposited on the inner wall of the blood vessel and the lumen is occluded.

The multilayered lipid and thrombus complexes constituting the stenotic lesion thus formed are replaced with collagen as time passes. These collagens form a mass of multimolecular molecules from a single molecule, and the cross-linking reaction and the calcination and then calcified to form a mechanically stable phosphorylated layer to prevent blood circulation.

As a method of treating such chronic stricture, a method of reperfusion and a method of physically perforating a fibrin-collagen complex by chemical decomposition are used.

It is generally known that rotary cutting methods are particularly useful for hardened stricture lesions with calcification.

However, currently used physical perforation methods are difficult to penetrate the central part of the lesion along the center of the blood vessel in the process of penetrating the hard calcified lesion, and it is difficult for the angiostatic agent to be injected in the direction of blood flow through the occlusion area of the blood vessel Therefore, there is a problem that it is difficult to secure the shape of the blood vessel after the passage of the entire stricture of the stomach, thereby causing damage and puncture of the inner wall of the blood vessel during the physical procedure.

Therefore, the success rate of angioplasty is 95% in patients without chronic complete stenosis, but only 70% in patients with chronic complete stenosis.

Also, a typical mechanism of conventional chronic complete stenosis treatment is to treat with high stiffness using a large, sharp wire at the front.

However, such a device has a disadvantage in that it is difficult to precisely align the center of the stent when the wire is pushed and difficult to adjust the direction. In addition, such procedures require a very high degree of proficiency, and the success rate of the procedure is determined according to the skill of the practitioner.

For example, in a patent application No. 10-2010-0095782 (publication date: 2010.09.01), a mechanism for removing a chronic complete stricture lesion in a blood vessel is proposed, and a lesion removal tool is attached to the front end of a catheter entering the lumen of the vessel And a posterior regulating portion is provided to regulate the position of the lesion removal tool to remove the lesion in the vessel.

However, since the lesion removal tool must be moved to the target site in a state where the lesion removal tool is exposed to the outside of the catheter, the blood vessel may be damaged by the lesion removal tool.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art, and it is an object of the present invention to provide a tunneling device for removing a lesion by a lesion removal tool, Catheter system for a patient.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a catheter system for tunneling, comprising: a hollow catheter having a hole longitudinally formed at a distal end thereof; A tool for removing a lesion, which is provided with a cutting tip protruding forward through the hole and is inserted into the catheter to perform a back and forth movement; A fluid filled in the catheter and mediating a driving force for driving the lesion removal tool; And a driving unit for generating a pressure in the fluid.

Preferably, in the present invention, the driving unit is driven by the reciprocating motion to drive the lesion removing tool through the fluid, more preferably, the driving unit is provided at the proximal end of the catheter, .

Preferably, the catheter further includes a guide member for guiding the movement direction of the lesion removing tool within the distal end portion of the catheter.

Preferably, in the present invention, the catheter is larger in diameter than the diameter of the distal end where the lesion removal tool is located, the proximal end being the inlet of the catheter, more preferably, the catheter comprises a first catheter, And a second catheter having a larger diameter than the first catheter, the second catheter being assembled with the first catheter. More preferably, the second catheter is characterized in that the driving portion is elastically supported by an elastic body.

Tunneling catheter system according to the present invention, the hollow catheter having a hole formed in the longitudinal direction through the front end; A tool for removing a lesion provided with a cutting tip protruding forward through the hole and capable of moving back and forth in the catheter; And a drive means for generating a reciprocating motion of the tool for removing a lesion by means of an induction magnetic field or a fluid so as to be able to perform efficient operation without requiring a high degree of proficiency of a practitioner It is possible to remove stenosis in the blood vessel.

Particularly, the tunneling catheter system according to the present invention has an effect of preventing the vessel from being damaged unintentionally during the entry of the catheter, because the tool for removing the lesion is not exposed inside the catheter, .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram showing a first embodiment of a catheter system for tunneling according to the present invention;
2 (a) and 2 (b) are views showing a process of removing stenosis using the first embodiment of the catheter system for a tunnel according to the present invention,
3 is a view showing a second embodiment of a catheter system for a tunnel according to the present invention,
4 is a view showing a third embodiment of a catheter system for a tunnel according to the present invention.

The specific structure or functional description presented in the embodiment of the present invention is merely illustrative for the purpose of illustrating an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention can be implemented in various forms. And should not be construed as limited to the embodiments described herein, but should be understood to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Meanwhile, in the present invention, the terms first and / or second etc. may be used to describe various components, but the components are not limited to the terms. The terms may be referred to as a second element only for the purpose of distinguishing one element from another, for example, to the extent that it does not depart from the scope of the invention in accordance with the concept of the present invention, Similarly, the second component may also be referred to as the first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but it should be understood that there may be other elements in between something to do. On the other hand, when it is mentioned that an element is "directly connected" or "directly contacted" to another element, it should be understood that there are no other elements in between. Other expressions for describing the relationship between components, such as "between" and "between" or "adjacent to" and "directly adjacent to" should also be interpreted.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. It will be further understood that the terms " comprises ", or "having ", and the like in the specification are intended to specify the presence of stated features, integers, But do not preclude the presence or addition of steps, operations, elements, parts, or combinations thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

≪ Embodiment 1 >

1, the catheter system for tunneling according to the present invention includes a catheter 110, a tool for removing a lesion 120, a fluid 141, and a driving unit 150.

The catheter 110 is a hollow tube as a whole, and a hole 111 is formed in the distal end portion of the catheter 110 in the longitudinal direction.

The catheter 110 may be provided by a flexible synthetic resin material and may be provided with a proximal end which is different from the distal end where flexibility is required during catheterization, May be provided with a synthetic material coated on a reinforcing member such as a coil spring or braid braided with a metal wire or the proximal portion of the catheter may be made of a metal material such as stainless steel.

The lesion removal tool 120 may comprise a cutting tip 121 and a body 122 secured to the cutting tip 121 and positioned within the catheter 110.

The cutting tip 121 is for removing stenosis in a blood vessel by longitudinal movement in the longitudinal direction, and may be provided by a sharp-pointed tip in a blade or a conical shape. It should be understood that the shape of the cutting tip in the present invention may have various shapes within a range in which the stenosis in the blood vessel can be effectively removed by the back and forth motion in the longitudinal direction.

 The body 122 is positioned within the catheter 110 and is reciprocated in a back and forth direction. A guide member for guiding the direction of motion of the lesion removal tool 120 may be added to the distal end of the catheter 110.

1, the body 122 is inserted into the distal end of the catheter 110 to provide a guiding member 130 for guiding the forward and backward movement of the catheter 110, The reciprocating motion can be stably performed while maintaining the centering.

In this embodiment, the fluid 141 is an incompressible fluid and is filled in the catheter 110 to mediate the driving force of the driving unit 150 for driving the lesion removal tool 120.

The driving unit 150 generates pressure in the fluid 141 to drive the lesion removing tool 120 via the fluid 141. [

Particularly, in the present invention, it is preferable that the driving unit 150 is provided at the proximal end of the catheter 110, which is the inlet of the catheter 110.

As shown in FIG. 1, the driving unit 150 includes a vibration source 151, vibration sources 151 and 152, May be provided by a first piston 153 connected by a rod 152 and a second piston 154 provided at a rear end of the lesion removal tool 120 and may be provided by a first piston 153 and a second piston 154, The fluid (141) is filled between the pistons (154).

Meanwhile, a well-known sealing member capable of maintaining the airtightness of the fluid may be provided between the first piston 153 and / or the second piston 154 and the catheter 110.

In this embodiment, the oscillation source 151 may be provided by a known piezoelectric element which is applied with a voltage to cause mechanical deformation, or a device in which a linear reciprocating motion can be performed using the rotational driving force of the motor.

The thus configured catheter tunneling system vibrates the lesion removal tool 120 back and forth through the fluid 141 by the vibration drive of the driving unit 150 located outside the body, Perforation can be made.

The tunneling catheter system of the present invention constructed as above will be described with reference to FIG.

As shown in FIG. 2 (a), only the catheter 110 is guided to the target site of the blood vessel 10 to be treated using a guide wire or the like.

Next, the lesion removal tool 120 is inserted into the catheter 110 and the lesion removal tool 120 is pushed to the distal portion of the catheter 110. At this time, the location of the stenosis and the tool for removing the lesion can be confirmed by using X-ray or the like.

Next, as shown in FIG. 2 (b), the fluid 141 is filled into the catheter 110 at the rear end of the lesion removal tool 120, and the first piston 153 and the driving unit 150 are inserted into the catheter 110 Fit and assemble.

Thereafter, when the driving unit 150 is operated, the vibration of the driving unit 150 is transmitted to the lesion removal tool 120 via the fluid 141, and the stenosis 20 can be punctured.

On the other hand, depending on the size and condition of the stenosis, the entire stenosis is not removed, but only the hardened aggregation surface is punctured after the stenosis is calcined, and then the remaining stenosis is removed by a well-known chemical or physical treatment method .

≪ Embodiment 2 >

Referring to FIG. 3, a catheter system for tunneling according to another embodiment of the present invention includes a catheter 210, a lesion removal tool 220, a fluid 241, and a driving unit 250.

The catheter 210 is a hollow tube as a whole, and a hole 211 is formed in the distal end portion of the catheter 210 in the longitudinal direction. Such a catheter 210 may include all of the technical features described in the first embodiment, and therefore redundant description will be omitted. Although not shown, it is to be understood that a guide member may be provided in the catheter for guiding the forward and backward motion of the lesion removal tool.

Particularly, in this embodiment, the catheter 210 is characterized in that the diameter R2 of the proximal end portion where the driving portion 250 is provided is larger than the diameter R1 of the distal end portion where the lesion removal tool 220 is located .

The proximal end diameter R2 of the catheter 210 is made larger than the distal end diameter R1 so that the driving force generated in the driving unit 250 by increasing the pressure intensification ratio can be eliminated by the fluid 241 The tool 220 can be more effectively transmitted.

The driving unit 250 may be provided by a vibration source 251 and a thin film 253 connected by the vibration source 251 and the rod 252. The vibration generated by the vibration source 251 may be And the vibration is transmitted to the piston 254 through the fluid 241 by the vibration of the thin film 253. [

The tunneling catheter system according to this embodiment can be perforated on the stenosis by the same procedure as in the first embodiment, while the proximal end diameter R2 of the catheter 210 is equal to the diameter of the distal end R1), vibrations generated in the driving unit 250 are transmitted with a large increase / decrease ratio via the fluid 241, so that it is effective for removing stiff objects having a hard surface.

≪ Third Embodiment >

4, a tunneling catheter system according to another embodiment of the present invention includes a catheter 310, a tool for removing a lesion 320, a fluid 341, and a driver 350.

The catheter 310 is a hollow tube as a whole, and a hole 311 formed in the distal end portion thereof in the longitudinal direction is formed. Such a catheter 210 may include all of the technical features described in the first embodiment, so that redundant description will be omitted and the difference will be mainly described. Although not shown, it should be understood that guide members for guiding the forward and backward motion of the lesion removal tool may be provided in the catheter.

Particularly, in this embodiment, the catheter 310 is composed of the first catheter 310a and the second catheter 310b that can be assembled with the first catheter 310a. The diameter of the first catheter 310a is smaller than the diameter R1 of the first catheter 310a And the diameter R2 of the second catheter 310b is larger.

Meanwhile, the driving unit 350 may be provided by the vibration source 351 and the first cylinder 363 connected by the vibration source 351 and the rod 352, and at this time, the second catheter 310b may be provided. A supported arcuate leaf spring 370 may be added, and the leaf spring 370 may allow a pure force to be applied to the fluid 341 while compressing and expanding by the forward and backward reciprocating motion of the rod 352. have.

In the tunneling catheter system according to this embodiment, the stenosis may be punctured by the same procedure as in the first embodiment. In particular, the catheter 310 may include a first catheter 310a and a second catheter 310b The first catheter 310a is inserted first and the second catheter 310b having a relatively large volume is inserted into the first catheter 310a by assembling the catheter 310a, Catheter insertion can be performed more easily.

In addition, in the process of vibration by the driving unit 350, the plate spring 370 acts on the fluid 341 momentarily with a large amount of impact due to compression and expansion, thereby more effectively removing the stitches.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

110, 210, 310: Catheters 120, 220, 310:
130: guide member 141, 241, 341: fluid
150, 250, 350:

Claims (6)

A hollow catheter having a hole formed at its distal end in a longitudinal direction;
A tool for removing a lesion, which is provided with a cutting tip protruding forward through the hole and is inserted into the catheter to perform a back and forth movement;
A fluid filled in the catheter and mediating a driving force for driving the lesion removal tool;
A catheter system for tunneling to remove chronic stenosis lesions including a drive for generating pressure to the fluid. The catheter system for tunneling according to claim 1, wherein the drive unit is driven in the forward and backward directions by the reciprocating motion through the fluid. 3. The catheter system for tunneling according to claim 2, wherein the driving unit is provided at a proximal end of the catheter. The catheter system for tunneling according to claim 1, further comprising a guide member guiding the movement direction of the lesion removing tool in the distal end portion of the catheter. The catheter system for tunneling according to claim 1, wherein the catheter is larger in diameter at the proximal end of the catheter than the diameter of the distal end where the lesion removal tool is located. The catheter system of claim 5, wherein the driving part is elastically supported by an elastic body at a proximal portion of the catheter.

Images