KR101133157B1 - Detachable and retrievable embolic protection device and filter assembly composing the same - Google Patents

Abstract

The present invention relates to a detachable and recoverable embolic protection device and a filter assembly constituting the same. The present invention and the guide wire is inserted into the blood vessel; Sheath and the guide wire is inserted therein; A filter assembly detachably coupled to the tip of the guide wire, expandable in a state inserted into the blood vessel, and recovered in a contracted state by the sheath; And a recovery means inserted into the guide wire and coupled with the filter assembly to recover the filter assembly. According to the present invention, after inserting the filter assembly into the carotid artery, the guide wire can be removed and the procedure can be performed, thereby minimizing the number of guide wires and sheaths to be inserted into the body, and thus guide wire toward the heart valve procedure and other interventional procedures. Through the insertion of a separate stent, the operator's burden on the occurrence of stroke during the procedure is lessened, there is an effect that can be performed more stably.

Embolism, filter, valve

Description

Detachable and retrievable embolic protection device and filter assembly composing the same}

The present invention relates to a detachable embolic protection device, and more particularly, to an embolic protection device having a removable structure and a filter assembly installed for filtering blood clots and the like inside a blood vessel and a filter assembly constituting the same. .

The valve located at the beginning of the aorta prevents the reflux of fresh arterial blood supplied from the left ventricle of the heart and leads to death if damaged by genetic or pathological causes, so the aortic valve is the most important position in the circulatory tissue. .

When calcification of the aortic valve occurs, a valve disease may occur and cause stenosis. Aortic valve stenosis is a disorder in which the entrance of the valve becomes narrow when blood flows from the left ventricle to the aorta, which does not release enough blood from the left ventricle to the aorta, resulting in increased pressure in the left ventricle and the burden of pressure on the myocardium. Hypertrophy will appear.

As described above, as a method of treating calcified aortic valve causing stenosis, the stent wrapped by the balloon is placed on the aortic valve area, and then the high pressure is applied to the balloon so that the stent expands. A therapeutic method for widening the aortic valve has been suggested. However, in the balloon and stent inflation process, lime existing in the aortic valve is separated from the aortic valve and moved to other body organ parts.

In other words, the lime separated from the aortic valve may be moved to another part of the body by the pressure pumping from the heart. In other words, as the lime falls by the impact from the aortic valve, it is introduced into other parts such as the kidney, arm, leg, and head.

As such, when lime is introduced into another part, the blood vessel is blocked in the part, and thus there is a risk of causing disease in another part. In particular, when lime is introduced into the carotid artery formed to the head to block blood vessels, there is a problem of causing a fatal disease such as causing brain disease to cause stroke.

Therefore, in order to prevent such a problem, conventionally, when there is a carotid artery disease, a procedure was performed in a state in which a carotid artery was blocked by inserting a balloon and a filter. However, in order to inject a balloon and a filter, it is necessary to insert the guide wire connected with these instruments and the accompanying various instruments and ceramics. It was difficult to do.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and provides an embolic protection device having a structure capable of inserting a guide wire having a minimum number of guide wires and an accompanying instrument into the body. To provide.

Another object of the present invention is to provide an embolic protection device having a structure in which the operator can easily recover the filter assembly.

Technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

According to a feature of the present invention for achieving the object as described above, the embolic protection device according to the present invention includes a guide wire inserted into the blood vessel; Sheath and the guide wire is inserted therein; And a filter assembly detachably coupled to the tip of the guide wire, expandable in a state inserted into the blood vessel, and recovered in a contracted state by the sheath.

A guide magnet having a magnetic shape is provided at the tip of the guide wire, and the guide magnet is attached to a filter magnet provided at a rear end of the filter assembly.

Inserted together with the guide wire, it is characterized in that it further comprises a recovery means coupled to the filter assembly to recover the filter assembly.

The recovery means may include a recovery wire inserted together with the guide wire; It characterized in that it comprises a snare provided at the tip of the recovery wire.

The recovery wire is characterized in that it is inserted through the inside of the guide wire of the hollow shape.

The filter magnet is characterized in that at least one hook hook for the recovery means is provided.

The hook hook is characterized in that the four are provided at right angles to the filter magnet.

The hook hook is characterized in that the three are arranged to form 120 ° to each other in the filter magnet.

The filter assembly is characterized in that at least one hook hook for the recovery means is provided.

The hook hook is characterized in that the four in the filter assembly is provided to be perpendicular to each other.

The hook hook is characterized in that the three are arranged to form 120 ° to each other in the filter magnet.

The recovery means may include a recovery wire inserted together with the guide wire; It is characterized in that it comprises a recovery hook which is provided at the front end of the recovery wire is hooked to the filter assembly.

The recovery means may include a recovery wire inserted together with the guide wire; And a recovery forceps provided at the front end of the recovery wire to hang on the filter assembly.

The filter assembly may include an expansion part made of an expandable material and in contact with an inner wall of the blood vessel; It is characterized in that it comprises a filtering unit for filtering the thrombus is provided at the front end of the expansion portion.

The filtering part is characterized in that a thin film having pores is further coupled.

A guide filter for centering the guide wire is provided at the tip of the guide wire, and the guide filter is made of an expandable material and is contracted while being inserted into the sheath.

The guide filter is characterized in that the funnel shape.

According to another feature of the invention, the embolic protection device according to the present invention and the guide wire is inserted into the blood vessel; Sheath and the guide wire is inserted therein; A filter assembly detachably coupled to the tip of the guide wire, expandable in a state inserted into the blood vessel, and recovered in a contracted state by the sheath; And a recovery means inserted into the guide wire and coupled with the filter assembly to recover the filter assembly.

The recovery means may include a recovery wire inserted together with the guide wire; It is characterized in that it comprises a recovery hook which is provided at the front end of the recovery wire is hooked to the filter assembly.

The recovery means may include a recovery wire inserted together with the guide wire; And a recovery forceps provided at the front end of the recovery wire to hang on the filter assembly.

The recovery wire is characterized in that it is inserted through the inside of the guide wire of the hollow shape.

A guide filter for centering the guide wire is provided at the tip of the guide wire, and the guide filter is made of an expandable material and is contracted while being inserted into the sheath.

The guide filter is characterized in that the funnel shape.

According to another feature of the invention, the filter assembly according to the invention is made of an expandable material and in contact with the inner wall of the blood vessel; A filtering unit provided at the tip of the expansion unit to filter the blood clot; It is provided at the rear end of the expansion portion includes a detachable means detachably coupled to the guide wire.

The detachable means is characterized in that the filter magnet attached to the guide magnet provided at the tip of the guide wire.

The detachable means may further include a hook hook provided on the filter magnet to which the guide wire side is hooked.

The detachable means is characterized in that it further comprises a hook hook is provided on the rear end of the expansion portion is the guide wire side is walked.

The filtering part is characterized in that a thin film having pores is further coupled.

In the present invention, the embolic protection device is composed of a filter assembly and a guide wire detachable from the filter assembly. Therefore, after the filter assembly is inserted into the carotid artery, the guide wire can be removed and the procedure can be performed. Therefore, the number of guide wires and the accompanying instruments is minimized, so that a separate stent can be inserted through the guide wire and the accompanying ceramics toward the valve. As it can reduce the burden on the operator, there is an effect that can be performed more stably.

In addition, in the present invention, the filter assembly and the guide wire can accurately detect the position by the magnet, and it is possible to easily recover the filter assembly by hooking the rear end of the filter assembly through a configuration such as a snare.

Hereinafter, a first embodiment of an embolic protection device according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the configuration of a first embodiment of the embolic protection device according to the present invention, Figures 2 to 4 is an operational state showing that the filter assembly is recovered by the first embodiment of the embolic protection device according to the present invention. to be.

As shown in these figures, the embolic protection device according to the present invention includes a guide wire 10 inserted into the blood vessel 1; Sheath 18 is inserted into the guide wire 10; Removably coupled to the tip of the guide wire 10, the expansion is possible in the state inserted into the blood vessel (1) and includes a filter assembly (30) contracted by the sheath (18).

In this embodiment, the blood vessel 1 into which the filter assembly 30 is inserted is preferably a carotid artery. This is to prevent the passage of lime and thrombus through the carotid artery during the aortic valve procedure, as described above. Of course, the filter assembly 30 may be inserted into another blood vessel 1 to perform a filtering function.

The guide wire 10 for insertion and withdrawal of the filter assembly 30 is inserted into the vessel 1. To this end, the guide wire 10 is detachably coupled with the filter assembly 30. That is, the guide wire 10 is inserted into the vessel 1 in a state coupled with the filter assembly 30 to insert the filter assembly 30 at a designated position, and then separated and discharged to the outside. After the aortic valve procedure is completed, the aortic valve procedure is inserted into the filter assembly 30 again and then combined with the filter assembly 30 to be safely recovered and discharged together. The guide wire 10 is used to insert a stent or the like into the body.

A guide magnet 12 is provided at the tip of the guide wire 10. The guide magnet 12 is a portion provided for coupling with the filter assembly 30 for the purpose of safe recovery, and is attached to the filter magnet 36 having a different polarity. In addition, the guide magnet 12 also serves to detect the position of the filter assembly 30 when the filter assembly 30 is recovered.

On the other hand, the guide magnet 12 may be made to be magnetic in its entirety, or may be made so that the magnetic material is provided only in the portion attached to the filter magnet 36.

The recovery wire 14 is inserted together with the guide wire 10. The recovery wire 14 is a portion inserted for recovery of the filter assembly 30. The recovery wire 14 may be inserted through the inside of the hollow guide wire 10 or may be inserted through the inside of the sheath 18 separately from the guide wire 10.

A snare 16 is provided at the tip of the recovery wire 14. The snare 16 is hooked on the hook hook 38 provided in the filter magnet 36. As such, when the operator pulls the recovery wire 14 in the state where the snare 16 is caught by the hook hook 38, the filter assembly 30 may be recovered by maintaining the tightly coupled state.

In this embodiment, the recovery wire 14 and the snare 16 are provided with recovery means such that the magnetic force of the guide magnet 12 and the filter magnet 36 at the time of recovery of the filter assembly 30. In order to recover the filter assembly 30 more effectively and safely when it is not easy to recover the filter assembly 30 alone, a sheath 18 is inserted together to surround the guide wire 10. do. The sheath 18 serves to contract the inflation portion 32 of the filter assembly 30. Specifically, when the sheath 18 is inserted into the filter assembly 30, the sheath 18 is wrapped around the expanded portion 32 of the filter assembly 30 so that the expanded portion 32 is formed on the inner wall of the blood vessel 1. It may be inserted without interference, and when the filter assembly 30 is discharged, it is inserted to surround the expansion part 32 so as to be smoothly discharged to the outside.

In addition, a guide filter 20 for centering the guide wire 10 is further provided at the tip of the guide wire 10. The guide filter 20 is a portion provided to prevent the centering is not biased to the outside when the guide wire 10 is coupled to the filter assembly 30 in the present embodiment. 5 and 6, when the guide wire 10 is inserted into the outer side as shown in FIG. 5, the guide filter 20 guides the guide wire 10 to be centered as shown in FIG. 6. .

To this end, the guide filter 20 has an approximately funnel shape. That is, the guide filter 20 has a circular cross-section that increases in diameter toward the front. As described above, since the front of the guide filter 20 is relatively wide, the filter magnet 36 may be guided inward, and as the filter magnet 36 is inserted into the guide filter 20, the guide is provided. Centering of the wire 10 takes place.

On the other hand, in the present embodiment, the guide filter 20 serves to filter a blood clot together with the filter assembly 30. The guide filter 20 is preferably made of an expandable iron wire, similar to the expansion portion 32 of the filter assembly 30. Therefore, the guide filter 20 is contracted by the sheath 18 and is expanded when the sheath 18 is pulled backward and is discharged to the outside. The guide filter 20 filters out blood clots or the like in the process of being discharged to the outside or inserted into the sheath 18.

The expansion part 32 of the filter assembly 30 is made of expandable iron wire, for example, a shape memory alloy. When the sheath 18 is inserted into the blood vessel 1 in a contracted state by the sheath 18 and the sheath 18 is pulled backward, the inflation portion 32 is inflated radially and comes into contact with the inner wall of the blood vessel 1. By doing so, the expansion portion 32 prevents blood clots, lime, and the like from passing through the blood vessel 1.

The front end of the inflation portion 32 is provided with a filtering portion 34 which is substantially filtered. The filtering unit 34 is made of a dense iron wire to prevent the thrombus 35 or the like from escaping. On the other hand, the filtering unit 34 may be provided with a thin film having pores (細孔) for more effective filtering.

On the other hand, the rear end of the expansion portion 32 is provided with a filter magnet 36 attached to the guide magnet 12. Like the guide magnet 12, the filter magnet 36 may be formed of a magnetic material itself, or may be formed of a magnetic material only in a portion attached to the guide magnet 12.

The filter magnet 36 is provided with a hook hook 38. In Figure 1 the hook hook 38 is configured in a pair symmetrical to each other. However, the hook hook 38 is not limited to the shape of FIG. 1 but may have a shape of the hook hook 39 shown in FIG. 7. On the other hand, in the above it was described that the hook hook 38 is provided in the filter magnet 36, but is not necessarily limited to this hook hook 38 may be provided on the rear end side of the expansion portion (32). .

A total of four hook hooks 39 shown in FIG. 7 are provided in the filter magnet 36. That is, the hook hooks 39 are provided at the filter magnets 36 to be perpendicular to each other. As the hook hook 39 is provided in all directions, the snare 16 can be more effectively hooked to the hook hook 39. In addition, the hook hook 39 may be provided so that the three to form a 120 ° to each other.

On the other hand, the guide magnet 12, the snare 16, the filter magnet 36 and the hook hook 38 described above, the operator is attached between the magnets 12 and 36, the snare 16 is hook hook ( 38), it is preferable that a radioopaque material is provided to check whether or not.

Hereinafter, a process of recovering the filter assembly according to the first embodiment of the present invention having the configuration as described above will be described.

First, the process of inserting the filter assembly 30 will be briefly described. The sheath 18 is inserted into the outer surface of the filter assembly 30. In this state, since the expansion part 32 is contracted by the sheath 18, the expansion part 32 can be inserted smoothly without interfering with the inner wall of the blood vessel (1). In this way, when the filter assembly 30 is inserted and positioned between a designated position, for example, between the carotid arteries, the operator pulls the sheath 18 backward. Then, the inflation portion 32 is inflated as shown in FIG. 1 to be in contact with the inner wall of the blood vessel 1. In addition, the filter assembly 30 is filtered through the filtering unit 34.

Thus, in the state in which the filter assembly 30 is installed, the operator inserts a separate guide wire into the valve side on which the procedure is performed. When the procedure is finished, the filter assembly 30 must be recovered again. At this time, the operator inserts the guide wire 10, the recovery wire 14, and the sheath 18 toward the filter assembly 30.

2 to 4, the guide magnet 12 and the filter magnet 36 are attracted to each other by magnetic force while the guide wire 10 is inserted from left to right with reference to the drawings. Whether the guide magnet 12 and the filter magnet 36 are attached to each other can be confirmed with a radiopaque material provided in both. In the process of attracting the guide magnet 12 and the filter magnet 36, the operator inserts the recovery wire 14 so that the snare 16 is hooked to the hook hook 38. This state is well illustrated in FIG. 3.

The operator inserts the sheath 18 while the snare 16 is hooked to the hook hook 38 (identifiable through a radiopaque material). The sheath 18 is inserted to contract the guide filter 20 and the expansion part 32. The guide filter 20 and the expanded portion 32 contracted as described above are inserted into the sheath 18 as shown in FIG. 4, and in this state, the operator has the guide wire 10 and the recovery wire 14. To pull out the filter assembly 30.

Hereinafter, a second embodiment of the embolic protection device according to the present invention will be described in detail with reference to the accompanying drawings. In the figure, the corresponding configuration of the first embodiment is given a hundred number, and the detailed description of the same configuration as the first embodiment will be omitted for convenience.

10 to 13 are perspective views showing the configuration of the second embodiment of the embolic protection device according to the present invention.

As shown in these figures, in the second embodiment, unlike the first embodiment, the configuration of the recovery means for recovering the filter assembly 130 is different. That is, the recovery hook 116 is provided at the tip of the recovery wire 114 to recover the filter assembly 130.

The recovery hook 116 is formed in a substantially hooked shape so as to be hooked to the rear end of the expansion part 132 so that the filter assembly 130 can be recovered to the outside. In the present embodiment, the hook hook 116 may be configured to be hooked to the hook hook 138. If the hook hook 116 is hooked to the inflation portion 132, the hook hook 138 may be configured. Omitted embodiments will be possible.

Recovery of the filter assembly 130 by the configuration of the second embodiment is well illustrated in FIGS. 11 to 13.

Hereinafter, with reference to the accompanying drawings a third embodiment of the embolic protection device according to the present invention will be described in detail. In this figure, the corresponding configuration of the first embodiment has been given a number of two hundred generations, detailed description of the same configuration as the first embodiment will be omitted for convenience.

14 to 17 are perspective views showing the configuration of the third embodiment of the embolic protection device according to the present invention.

As shown in these figures, in the third embodiment, unlike the first and second embodiments, the configuration of the recovery means for recovering the filter assembly 230 is different. That is, the recovery tongs 216 are provided at the tip of the recovery wire 214 to recover the filter assembly 230.

The recovery tongs 216 are formed in a shape of a tong that is bent inwardly to the front end thereof, so that the filter assembly 230 can be recovered to the outside by being hooked to the rear end of the expansion part 232. On the other hand, in the present embodiment, the collection tongs 216 may be configured to be hooked to the hook hook 238. If the collection tongs 216 are hooked to the expansion unit 232, the hook hook 238 may be configured. Omitted embodiments will be possible.

The process of recovering the filter assembly 230 by the configuration of the third embodiment is well illustrated in FIGS. 14 to 17.

The scope of the present invention is not limited to the embodiments described above, but is defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self evident.

In the above-described embodiment, representative means are easily listed. Means for recovering, as well as the above-described configuration of snare, recovery hook, and recovery tongs, may be employed. For example, an umbrella shape, a screw shape, or the like may be employed to recover the filter assembly.

1 is a perspective view showing the configuration of a first embodiment of a detachable and recoverable embolic protection device according to the present invention.

2 to 4 is an operational state showing that the filter assembly is recovered by the first embodiment of the detachable and recoverable embolic protection device according to the present invention.

5 and 6 is an operation state showing that the centering by the guide filter in the detachable and recoverable embolic protection device according to the present invention.

7 to 9 is an operational state diagram showing another embodiment of the hook hook constituting the present invention.

10 to 13 is a perspective view showing the configuration of a second embodiment of the detachable and recoverable embolic protection device according to the present invention.

14 to 17 is a perspective view showing the configuration of a third embodiment of a detachable embolic embroiderable embroider according to the present invention.

Explanation of symbols on the main parts of the drawings

1: blood vessel 10: guide wire

12: guide magnet 14: recovery wire

16: Snare 18: Sheath

20: guide filter 30: filter assembly

32: expansion portion 34: filtering portion

36: filter magnet 38: hook hook

101: blood vessel 110: guide wire

112: guide magnet 114: recovery wire

116: recovery hook 118: sheath

120: guide filter 130: filter assembly

132: expansion unit 134: filtering unit

136: filter magnet 138: hook hook

201: blood vessel 210: guide wire

212: guide magnet 214: recovery wire

216: Recovery clip 218: Sheath

220: guide filter 230: filter assembly

232: expansion unit 234: filtering unit

236: filter magnet 238: hook hook

Claims (28)

delete A guide wire inserted into the blood vessel; Sheath and the guide wire is inserted therein; A filter assembly detachably coupled to the tip of the guide wire, expandable in a state inserted into the blood vessel, and recovered in a contracted state by the sheath; A guide magnet having a magnetic shape is provided at the tip of the guide wire, and the guide magnet is attached to a filter magnet provided at a rear end of the filter assembly. The method of claim 2, And a recovery means inserted into the guide wire and coupled with the filter assembly to recover the filter assembly. The method of claim 3, wherein the recovery means, A recovery wire inserted together with the guide wire; Embolism protection device characterized in that it comprises a snare provided at the tip of the recovery wire. The method of claim 4, wherein The recovery wire is embolus protection device characterized in that inserted through the inside of the guide wire of the hollow shape. The method of claim 4, wherein The filter magnet is embolic protection device characterized in that provided with at least one hook hook for hanging the recovery means. The method of claim 6, The hook hook is embolic protection device characterized in that the four are provided at right angles to the filter magnet. The method of claim 6, The hook hook is embolic protection device characterized in that the three are arranged to form 120 ° to each other in the filter magnet. The method of claim 4, wherein And the filter assembly is provided with at least one hook hook for hanging the recovery means. The method of claim 9, The hook hook is embolic protection device characterized in that provided in the filter assembly so that the four perpendicular to each other. The method of claim 9, The hook hook is embolic protection device characterized in that the three are arranged to form 120 ° to each other in the filter magnet. The method of claim 3, wherein the recovery means, A recovery wire inserted together with the guide wire; And a recovery hook provided at the front end of the recovery wire and hooked to the filter assembly. The method of claim 3, wherein the recovery means, A recovery wire inserted together with the guide wire; And a recovery forceps provided at the front end of the recovery wire and hooked to the filter assembly. The method of claim 3, wherein the filter assembly, An expansion part made of an expandable material and in contact with the inner wall of the blood vessel; Embol protection device characterized in that it comprises a filtering unit provided at the front end of the expansion portion for filtering the blood clots. The method of claim 14, The embolic protection device, characterized in that the thin film having pores further coupled to the filtering portion. The method according to any one of claims 2 to 15, A guide filter for centering the guide wire is provided at the tip of the guide wire, and the guide filter is made of an expandable material and is contracted while being inserted into the sheath. The method of claim 16, The guide filter is embolic protection device characterized in that the funnel shape. delete A guide wire inserted into the blood vessel; Sheath and the guide wire is inserted therein; A filter assembly detachably coupled to the tip of the guide wire, expandable in a state inserted into the blood vessel, and recovered in a contracted state by the sheath; It is inserted with the guide wire, and coupled with the filter assembly includes a recovery means for recovering the filter assembly, The recovery means, A recovery wire inserted together with the guide wire; And a recovery hook provided at the front end of the recovery wire and hooked to the filter assembly. A guide wire inserted into the blood vessel; Sheath and the guide wire is inserted therein; A filter assembly detachably coupled to the tip of the guide wire, expandable in a state inserted into the blood vessel, and recovered in a contracted state by the sheath; It is inserted with the guide wire, and coupled with the filter assembly includes a recovery means for recovering the filter assembly, The recovery means, A recovery wire inserted together with the guide wire; And a recovery forceps provided at the front end of the recovery wire and hooked to the filter assembly. The method of claim 19 or 20, The recovery wire is embolus protection device characterized in that inserted through the inside of the guide wire of the hollow shape. The method of claim 19 or 20, A guide filter for centering the guide wire is provided at the tip of the guide wire, and the guide filter is made of an expandable material and is contracted while being inserted into the sheath. The method of claim 22, The guide filter is embolic protection device characterized in that the funnel shape. delete An expansion part made of an expandable material and in contact with the inner wall of the blood vessel; A filtering unit provided at the tip of the expansion unit to filter the blood clot; It is provided at the rear end of the expansion portion includes a detachable means detachably coupled to the guide wire, The detachable means, Filter assembly characterized in that the filter magnet is attached to the guide magnet provided at the tip of the guide wire. The method of claim 25, wherein the removable means, The filter assembly, characterized in that it further comprises a hook hook which is provided on the filter magnet and the guide wire side is walked. The method of claim 25, wherein the removable means, And a hook hook provided at a rear end of the expansion part to hang the guide wire side. The method according to any one of claims 25 to 27, The filter assembly, characterized in that the filter further comprises a thin membrane having pores.

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