KR20190068119A - Catch Catheter - Google Patents

Abstract

The present invention relates to a capture catheter, and more particularly, to a capture catheter for safely guiding a wire from the RVOT to the inferior vena cava in a mitral valve cerclage procedure. The capture catheter according to the present invention comprises an inner catheter formed with a through-hole through which a guide wire is inserted; an outer catheter formed with a through-hole through which the inner catheter is inserted; and one or more captures, both ends of which are annularly coupled to the inner catheter.

Description

Capture Catheter {

The present invention relates to a capture catheter, and more particularly, to a capture catheter for safely guiding a wire from a RVOT to an inferior vein in a mitral valve circlip procedure.

Mitral regurgitation refers to a disease in which the mitral valve between the left atrium and the left ventricle in the heart is not properly closed, causing blood to flow backwards in the heart. In particular, it refers to a state in which the mitral valve is elongated or torn, or the chordae that fix the valve is broken and the mitral valve is closed completely, so that the blood flow to the systolic phase of the heart is partially reversed from the left ventricle to the left atrium. In the systole of the heart, the blood in the heart must advance from the left ventricle to the aorta through the aortic valve, but if the mitral valve does not work properly, the blood can not travel effectively through the heart to the body. Also, when the blood is refluxed, the blood that came out of the left atrium is returned, so the blood in the left atrium is increased and the pressure is higher than in the normal state.

Although there are methods to treat these mitral valve regurgitation, medication and surgical treatment, in fact, medication can not restore mitral regurgitation to normal. Surgical treatment includes performing a valvuloplasty that corrects the mitral valve by opening the chest and cutting the heart, or replacing the valve with a prosthetic valve. Conventional surgical treatment has excellent therapeutic effect, but it is an invasive treatment method that can cause up to 5% of patients with the possibility of death alone.

In order to solve such a problem, the present inventor has been patented in Korean Patent No. 10-1116867 by devising a CSTV tube which can perform a mitral valve regurgitation by inserting a catheter without opening the chest of the chest. In the procedure using the CSTV tube, a capture catheter is required in order to pull back the large vein, the coronary sinus, and the circulation wire that has entered the right ventricle back into the superior vein. Accordingly, the present inventor has devised a capture catheter in Korean Patent No. 1017303870, and as a part of the present invention, the present invention provides a method for easily and safely performing a circulatory wire introduced into the right ventricle through a superior vein and a coronary sinus in a mitral valve circlip procedure It is a study of a device that can be taken out into the inferior vena cava.

In the U.S. Patent No. 09579200, there is a problem in that the capture catheter can not enter the body in the wrong direction because there is no device for guiding the capture catheter when the capsule enters the body.

US 09579200 B2 (2017.02.28) KR 1017303870 B1 (2017.04.20)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a capture catheter for capturing a wire from an RVOT in a mitral valve circling procedure and safely guiding it to the inferior vena cava.

Another object of the present invention is to provide a capture catheter for removing foreign matter (guide wire, catheter, thrombus, etc.) in a blood vessel in the field of interventional treatment through blood vessels.

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

In order to achieve the above object, a preferred capture catheter according to an embodiment of the present invention includes an inner catheter having a through hole into which a guide wire is inserted, an outer catheter having a through hole for inserting the inner catheter therein, Includes one or more capsules joined to the inner catheter to form an annulus.

The capturing is characterized by being an elastic body of a metal material insertable into a body.

The capture is characterized by comprising a coupling for coupling with the inner catheter.

The cap is configured to be movable upward and downward along the through hole of the external catheter together with the internal catheter when the internal catheter is pushed into the body and pulled out of the body and is narrowed when inserted into the external catheter, .

The capture catheter further includes a securing tip coupled to an upper portion of the inner catheter to secure the inner catheter so that it does not fully extend out of the body when the inner catheter is pulled out of the body, .

Wherein an outer diameter of the center portion of the fixing tip is larger than an inner diameter of the outer catheter and a lower end outer diameter of the fixing tip is smaller than an inner diameter of the outer catheter.

And the fixing tip is a soft plastic material.

The capture catheter further comprises an engaging means, wherein the engaging means is coupled to an upper portion of the inner catheter.

And the engaging means is in the form of a balloon.

The fastening means includes a plurality of fingers arranged in a vertical direction, the fingers having an empty space between the flesh and the flesh, and the internal space being an empty sphere.

And the engaging means is an elastic body made of a metal insertable into the body.

The engaging means is configured to be movable up and down along the through hole of the external catheter together with the internal catheter when the internal catheter is pushed into the body and pulled out of the body. When the internal catheter is inserted into the external catheter, .

The capture catheter is characterized in that it includes a radiation-opaque indication to enable positioning in the body.

As described above, the capture catheter according to the present invention has a hole in the inner catheter, and can enter the body safely along the guide wire.

In addition, the capture catheter according to the present invention may include an engaging means to block entry into the safe zone and safely enter the body.

In addition, the capture catheter according to the present invention may include a securing tip to prevent the inner catheter from fully falling out of the body.

In addition, the capture catheter according to the present invention can capture the wire from the RVOT by the capture and safely guide it to the inferior vein.

1 is a perspective view of a capture catheter according to a preferred embodiment of the present invention.
2 is a perspective view of a capture catheter according to another preferred embodiment of the present invention.
3 is a perspective view of a fixing tip according to another preferred embodiment of the present invention.
Figure 4 is a perspective view of the capture catheter of Figure 2 when the inner catheter is pulled out of the body.
5 is a perspective view of a capture catheter according to another preferred embodiment of the present invention.
FIG. 6 is a perspective view of the capture catheter of FIG. 5 when the inner catheter is pulled out of the body; FIG. 6 (a) shows the case where only the capture is inserted into the inner catheter; .
FIG. 7 is a perspective view showing another capturing catheter according to another preferred embodiment of the present invention. FIG. 7 (a) shows the state before the air is injected into the balloon, and FIG.
8 is a perspective view of a capture catheter according to another preferred embodiment of the present invention.
9 is a flowchart of a method of operation using a capture catheter according to a preferred embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. &Quot; and / or "include each and every combination of one or more of the mentioned items. ≪ RTI ID = 0.0 >

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms " comprises "and / or" comprising "used in the specification do not exclude the presence or addition of one or more other elements in addition to the stated element.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

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

1 is a perspective view of a capture catheter according to a preferred embodiment of the present invention.

Referring to FIG. 1, a capture catheter according to a preferred embodiment of the present invention includes an inner catheter 10, an outer catheter 20, and a capture 30.

The inner catheter 10 has a lumen through which a guide wire passes and a lumen through which the inner catheter 10 passes is formed in the outer catheter 20. The inner catheter 10 is inserted into the through hole of the outer catheter 20 and is movable up and down along the through hole. The inner catheter 10 and the outer catheter 20 may be formed of a synthetic resin material such as a rubber material or a soft plastic material and may be made of a material that is soft and has high ductility and has excellent flexibility and stability Is used.

The capture 30 has an annular shape with both ends coupled to the inner catheter 10 and has a snare shape or a loop shape. The capture 30 may be a metal material (SUS304, Nitinol, Titanium, etc.) wire that can be inserted into the body, and may be a shape memory alloy, an elastic body, or a self expandable stent.

The capture 30 is composed of one or more, preferably three to four. The capture catheter includes a coupling body 32 for coupling a plurality of the captures 30 and the coupling body 32 includes both ends of a plurality of the captures 30 coupled to the outer peripheral surface of the inner catheter 10 Lt; / RTI >

The capture 30 may be inserted into the outer catheter 20 to be narrowed by moving the inner catheter 10 upward or downward or pushing it into the body, And is unfolded.

2 is a perspective view of a capture catheter according to another preferred embodiment of the present invention.

Referring to FIG. 2, a capture catheter according to another preferred embodiment of the present invention further includes a fixing tip 40 in the capture catheter of FIG.

The fixing tip 40 has a through hole formed therein to allow the inner catheter 10 to pass therethrough. The fixation tip 40 is coupled to an upper outer circumferential surface of the inner catheter 10 and has an inner circumferential surface that is tightly coupled to the outer circumferential surface of the inner catheter 10.

3 is a perspective view of a fixing tip according to another preferred embodiment of the present invention.

Referring to FIG. 3, the fixing tip 40 will be described in more detail. However, the fixing tip 40 is preferably made of a soft plastic material, but is not limited thereto. The outer diameter L1 of the fixing tip 40 is larger than the inner diameter L3 of the outer catheter 20 and the outer diameter L2 of the lower end of the fixing tip 40 is larger than the inner diameter L3 So that the central portion of the fixing tip 40 is caught by the outer catheter 20 so that the inner catheter 10 can be completely fixed to the inner catheter 10 do.

FIG. 4 is a perspective view of the inner catheter of FIG. 2 when the inner catheter is pulled out of the body. FIG.

Referring to FIG. 4, when the inner catheter 10 is pulled out of the body, the capture 30 captures the circular wire 70 and is inserted into the outer catheter 20, Is not inserted into the external catheter (20). Accordingly, the inner catheter 10 is prevented from completely separating from the outer catheter 20, and the outer catheter 20 is removed from the in vitro passage through the inferior vein to guide the circular large wire 70 into the inferior vein do.

FIG. 5 is a perspective view of a capture catheter according to another preferred embodiment of the present invention, and FIG. 6 is a perspective view when the inner catheter of FIG. 5 is pulled out of the body, (B) shows the case where the capture and the engaging means are inserted into the inner catheter.

5 and 6, a capture catheter according to another preferred embodiment of the present invention further comprises a catching means 50 in the capture catheter of FIG.

The engaging means 50 is coupled to the upper outer circumferential surface of the inner catheter 10 and may be in the form of a balloon or an elastic sphere. The locking means 50 is for passing the capture catheter into the safe zone of the tricuspid membrane when the capture catheter is inserted into the right ventricle through the inferior vena cava, tricuspid membrane. Said safe zone refers to where the capture catheter can safely pass through the tricuspid valve to the site of the valve leaflet, where there is no chordae, to the right ventricle. When the engaging means 50 moves to a place other than the safe zone, the engaging means 50 is prevented from moving any further. Figs. 4 and 5 show the case where the engaging means 50 is an elastic sphere. The locking means 50 includes a plurality of fingers installed in a vertical direction, and both ends of the plurality of fingers are coupled to the inner catheter 20. The space between the flesh and the flesh has an empty space, and the internal space has an empty sphere. The engaging means 50 may be a metal material (SUS304, Nitinol, Titanium, etc.) that can be inserted into the body and may be a shape memory alloy, an elastic body, or a self expandable stent.

When the inner catheter 10 is pulled out of the body, the engaging means 50 is inserted into the outer catheter 20 and is narrowed. When the inner catheter 10 is pushed into the body, It is unfolded.

FIG. 7 is a perspective view showing another capturing catheter according to another preferred embodiment of the present invention. FIG. 7 (a) shows the state before the air is injected into the balloon, and FIG.

Referring to FIG. 7, a capture catheter according to another preferred embodiment of the present invention includes a balloon-shaped engaging means 52, which is another type of engaging means, in the capture catheter of FIG. The balloon engaging means 52 is connected to the outer circumferential surface of the inner catheter 10 and is in the shape of a balloon which is inflated when air is injected from the outside. At this time, an air injection tube 54 for injecting air into the balloon-type fastening means 52 is coupled to the inner catheter 10, and the upper end of the air injection tube 54 is connected to the inner catheter 10). The air injected into the air injection tube 54 is transmitted to the balloon type engaging means 52 since a hole is formed in the inner catheter 10 abutting the upper end of the air injection tube 54 .

7 (a) shows a state before air is injected into the balloon-type engaging means 52, and Fig. 7 (b) shows a state after air is injected into the balloon-type engaging means 52. Fig. When the capture catheter is inserted into the body, air is injected into the balloon-shaped engaging means 52 and inserted into a state other than the safe zone as shown in FIG. 7 (b) Preventing the capture catheter from entering the safe zone safely.

8 is a perspective view of a capture catheter according to another preferred embodiment of the present invention.

Referring to FIG. 8, a capture catheter according to another preferred embodiment of the present invention further includes a fixing tip 40 and an engaging means 50 in the capture catheter according to the preferred embodiment of the present invention in FIG.

The fastening tip 40 and the fastening means 50 are coupled to the upper portion of the internal catheter 10 and the fastening tip 40 is engaged in a spaced apart position from the upper end of the fastening means 50. The fastening tip 40 and the fastening means 50 are as described above in FIGS.

Accordingly, the capture catheter according to the present invention can prevent entry of the inner catheter completely out of the safe zone, and can securely enter the body.

9 is a flowchart of a method of operation using a capture catheter according to a preferred embodiment of the present invention.

First, inserting the capture catheter into the body (S10) is a step of inserting the capture catheter according to the preferred embodiment of the present invention into the inferior vein, the right atrium, and the right ventricle.

Before inserting the capture catheter, the guide wire 60 is inserted into the body. The guide wire 60 guides the path through which the capture catheter is inserted into the body, and is inserted into the lower vein, the right atrium, and the right ventricle. The inner catheter 10 of the capture catheter inserts the guide wire 60 and moves along the guide wire 60 through the inferior vein to the right atrium and the right ventricle. In this case, the catheter is passed through the tricuspid membrane, and includes a catching means 50 for safely passing the capture catheter to the safe zone without the leaflet of the tricuspid valve and the chordae of the tricuspid valve. The retaining means 50 can be prevented from moving further by being caught by the retaining means 50 when moving to a place other than a safe zone and the capture catheter can be safely inserted into the body without damaging other parts of the body. .

The following is a step (S20) of capturing a circle large wire using a capture catheter. The capture catheter pushes the inner catheter 10 toward the body to capture the circumferential wire 70 located in the right ventricle, causing the capture 30 to protrude out of the outer catheter 20 to unfold. The capillary 30 is narrowed by pulling the inner catheter 10 in the outward direction by placing the circular large wire 70 in the extended capture 30 and capturing the circular large wire 70, And is inserted into the catheter 20.

Finally, the capture catheter is pulled out of the body (S30). The upper portion of the inner catheter 10 is coupled with a fixing tip 40 to prevent the inner catheter 10 from completely escaping from the body and being separated from the outer catheter 20. Thus, after the capture 30 captures the large wire 70, the inner catheter 10 is inserted into the outer catheter 20 to the position where the securing tip 40 is engaged, The large wire 70 is pulled out of the body through the insertion path of the capture catheter to guide the large wire 70 to the inferior vein.

In addition, the capture catheter according to the present invention can capture the wire from the RVOT by the capture and safely guide it to the inferior vein.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

10: Internal catheter
20: External catheter
30: Capture
32: Coupling
40: Fixing Tips
50:
52: balloon-type catching means
54: air injection tube
60: guide wire
70: Circle wire
80: Radiation-opaque indication

Claims (13)

CLAIMS What is claimed is: 1. A capture catheter for capturing a wire,
An inner catheter having a through hole into which a guide wire is inserted;
An outer catheter having a through hole for inserting the inner catheter therein; And
And one or more capsules at opposite ends of which are coupled to the inner catheter to form an annulus. The method according to claim 1,
Wherein the capture is an elastomer of a metal insertable into the body. The method according to claim 1,
RTI ID = 0.0 > 1, < / RTI > wherein the capture comprises a coupling for engaging the inner catheter. The method according to claim 1,
Wherein the capture is movable up and down along the aperture of the outer catheter with the inner catheter when the inner catheter is pushed into the body and pulled out of the body,
Wherein the catheter is narrowed when inserted into the outer catheter and is deployed when projecting out of the outer catheter. The method according to claim 1,
Wherein the capture catheter further comprises a securing tip,
The anchoring tip is coupled to an upper portion of the inner catheter,
Wherein when the inner catheter is pulled out of the body, the inner catheter is caught by the outer catheter so that the inner catheter is completely prevented from slipping out of the body. 6. The method of claim 5,
Wherein an outer diameter of the central portion of the fixed tip is larger than an inner diameter of the outer catheter,
Wherein the lower end outer diameter of the securing tip is smaller than the inner diameter of the outer catheter. 6. The method of claim 5,
Wherein the securing tip is a flexible plastic material. The method according to claim 1,
Wherein the capture catheter further comprises an engagement means,
Wherein the retaining means is coupled to an upper portion of the inner catheter. 9. The method of claim 8,
Wherein the retaining means is in the form of a balloon. 9. The method of claim 8,
Wherein the fastening means comprises a plurality of fingers arranged in a vertical direction, the fingers having an empty space between the flesh and the flesh, and the internal space being an empty sphere. 11. The method of claim 10,
Wherein the engaging means is an elastic body made of a metal insertable into the body. 11. The method of claim 10,
Wherein the engaging means is movable up and down along the through-hole of the external catheter together with the internal catheter when the internal catheter is pushed into the body and pulled out of the body,
The catheter being narrowed upon insertion into the outer catheter and deploying when projecting out of the outer catheter. The method according to claim 1,
Wherein the capture catheter comprises a radiation-opaque indication to enable positioning in the body.

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