CN217390797U - Releasing device - Google Patents

Abstract

The utility model provides a releaser, include: a proximal end adapted for fixed connection to a delivery guidewire; at least two elastic arms, one end of each elastic arm is connected with the near end, the middle section of each elastic arm is provided with a bulge protruding outwards, and the bulge is suitable for abutting against the inner wall of the micro catheter; and the at least two buckling parts are formed by bending and extending the other end of each elastic arm and are suitable for being clamped with the plugging device. In the process of conveying the plugging device, the protrusions are always abutted against the inner wall of the micro catheter, the reaction force applied to the buckling part by the inner wall of the micro catheter can improve the buckling force of the buckling part on the plugging device, and the situation that the operation process and the operation efficiency are influenced because the buckling of the plugging device is relieved in advance by the releaser is avoided.

Description

Releasing device

Technical Field

The utility model relates to a releaser, concretely relates to aneurysm plugging device's releaser.

Background

Intracranial aneurysm is an abnormal bulge formed by gradual expansion of an intracranial arterial vessel under the action of hemodynamic load and other factors, wherein local vessel wall damage is caused by congenital abnormality or acquired injury and other factors. Intracranial aneurysm is only second to cerebral thrombosis and hypertensive cerebral hemorrhage in cerebrovascular accidents, and in people, the prevalence rate of intracranial aneurysm is about 2% -7%, and the intracranial aneurysm can be attacked at any age, is common in 40-60 years, and is common in most women. Once the intracranial aneurysm breaks and bleeds, the disability and death rate is extremely high, wherein 10-15% of patients have no time to go to medical service for direct sudden death, the first bleeding and death rate is up to 35%, the second bleeding and death rate is up to 60-80%, and survivors also have disability.

The main means for treating the diseases in the past comprise direct clamping of the aneurysm through craniotomy, isolation and bridging of the aneurysm, intravascular interventional therapy and the like. In intravascular interventional therapy, a releaser is usually used, one end of the releaser is fixed with a delivery guide wire, the other end of the releaser is buckled with an occlusion device, and then the occlusion device is delivered to a target position in an aneurysm along a microcatheter under the pushing of the delivery guide wire.

A conventional releaser includes a base, a plurality of resilient arms extending from the base, and a plurality of clasping portions. The buckling parts are formed by bending and extending inwards from the tail ends of the elastic arms. The elastic arm and the buckling part are unfolded outwards in a natural state. In use, the occluding device is first held together with the release device, and the release device is in a contracted state by the restraint of the inner wall of the micro-catheter, thereby holding the occluding device. And after the plugging device is delivered to the target position of the aneurysm, withdrawing the micro catheter and not abutting against the releaser, after the releaser loses restraint, keeping the releaser in a free state, extending the elastic arm and the buckling part outwards, releasing buckling of the plugging device, keeping the plugging device at the target position, and then withdrawing the releaser, the delivery guide wire and the micro catheter for waiting for the next operation.

However, such a releaser has the following disadvantages:

because the occlusion device and the releaser are inserted into the blood vessel and have small sizes, the size of the buckling part is small, and the size of a boss or a groove on the occlusion device is small, so that the buckling relation between the releaser and the occlusion device can be released in advance in the transportation process due to insufficient buckling force of the buckling part on the boss or the groove, and further the operation process and the operation efficiency are influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the present invention lies in overcoming prior art, and on the way of carrying plugging device, because of the portion of holding of detaining of releaser is not enough to plugging device's the power of holding, and it is right to remove in advance plugging device's the effect of holding of detaining, plugging device can't reach the defect of aneurysm's target position to provide one kind and can improve the power of holding of detaining of portion, avoid releaser and plugging device to release the releaser of holding the relation on the way of carrying.

In order to solve the above technical problem, the utility model provides a pair of releaser, include:

a proximal end adapted for fixed connection to a delivery guidewire;

at least two elastic arms, one end of each elastic arm is connected with the near end, the middle section of each elastic arm is provided with a bulge protruding outwards, and the bulge is suitable for abutting against the inner wall of the micro catheter;

and the at least two buckling parts are formed by bending and extending the other ends of the elastic arms and are suitable for being clamped with the plugging device.

Optionally, an included angle between the buckling part and the elastic arm is equal to 90 degrees.

Optionally, the resilient arms are uniformly arranged along a circumference of the proximal end.

Optionally, the releaser is formed from a memory alloy tube by laser cutting.

Optionally, the proximal end is cylindrical.

Optionally, the buckling part is provided with a developing mark.

Optionally, the projection is provided with a developing mark.

Optionally, the visualization indicia on the clasping portion is adapted to correspond with the visualization portion of the aneurysm occlusion device.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a releaser, the middle section of its elastic arm is equipped with the arch, the arch is outstanding to the outside, is suitable for to lean on the inner wall that leans on at little pipe, the inner wall of little pipe is right the reaction force that the arch was applyed can improve the power is held in the knot of detaining the portion, avoids carrying plugging device's in-process, the releaser is relieved in advance right plugging device's the effect of detaining influences operation process and operation efficiency.

2. The utility model provides a releaser, it sets up the development mark in detaining the portion of holding, is suitable for the development portion cooperation with plugging device, and what can be clear sees detain hold the portion with plugging device's knot holds the state, avoids the releaser has not thoroughly relieved right plugging device's knot holds the effect, has begun to withdraw the releaser leads to the plugging device dislocation, and then needs the operation again.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the present invention with a release device delivering a closure device to an aneurysm via a delivery guidewire and microcatheter;

FIG. 2 is a schematic view of the release in a free state and a hold state;

FIG. 3 is a schematic view of a base of the occluding device;

figure 4 is a schematic view of the release device in cooperation with the occluding device.

Description of reference numerals:

1. a disengager; 10. a proximal end; 11. a resilient arm; 12. a fastening part; 13. a protrusion; 2. an aneurysm; 3. A plugging device; 30. a base; 31. an annular groove; 4. delivering a guide wire; 5. a microcatheter.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

Referring to fig. 1, the present embodiment provides a releaser 1 for holding an aneurysm of an occlusion device 3, and pushing the occlusion device 3 and the releaser 1 along the microcatheter 5 by the pushing force of a delivery guidewire 4 until the occlusion device 3 reaches a target location within the aneurysm 2.

Referring to fig. 3, the plugging device 3 includes a base 30, an annular groove 31 is formed on the base 30, and the annular groove 31 is made of developing material to form a developing portion. Of course, the annular groove 31 may be coated with the developing material only on the surface thereof. The annular groove 31 may also be a partial groove.

Referring to fig. 2, the releaser 1 is formed by laser cutting a memory alloy tube, which may be nitinol. One end of the releaser 1, which is far away from the plugging device 3, is fixedly connected with the conveying guide wire 4, and the welding or the bonding can be performed. The releaser 1 comprises a proximal end 10, a plurality of elastic arms 11 formed by extending from the proximal end 10, and a retaining part 12 formed by bending and extending from the tail end of each elastic arm 11. In the free state, the resilient arm 11 and the retaining portion 12 are flared.

Be equipped with the development mark on the near-end 10, with the cooperation of the development portion of base member 30, can clearly see the portion of holding 12 with the state is held to the knot of ring channel 31, avoids releaser 1 has not thoroughly relieved yet to plugging device 3's the effect of holding, has begun to withdraw releaser 1 leads to plugging device 3 dislocation, and then needs joint again, carries again.

The plurality of elastic arms 11 are uniformly arranged along the circumference of the proximal end 10, so as to provide a uniform buckling force for the plugging device 3. The middle section of the elastic arm 11 is provided with a protrusion 13 protruding outwards, the protrusion 13 always abuts against the inner wall of the micro catheter 5 in the process of conveying the plugging device 3, the reaction force exerted by the inner wall of the micro catheter 5 on the protrusion 13 can improve the retaining force of the retaining part 12 on the annular groove 31, and the situation that the retaining effect of the plugging device 3 is released in advance by the releaser 1 in the process of conveying the plugging device 3 to influence the operation process and the operation efficiency is avoided. The buckling part 12 is subjected to heat treatment, and forms a 90-degree included angle with the elastic arm 11, so that the contact surface between the buckling part 12 and the annular groove 31 of the plugging device 3 is large, and the buckling stability is improved.

With reference to fig. 2, the protrusion 13 is provided with a developing mark, and the position of the protrusion 13 can be determined according to the developing mark, so as to determine whether the elastic arm 11 is expanded outward away from the annular groove 31 of the plugging device 3.

Referring to fig. 4, the operation principle of the releaser 1 of the present invention is as follows:

when in use, the blocking device 3 and the releaser 1 are buckled together, specifically, the buckling part 12 of the releaser 1 buckles the bottom surface of the annular groove 31, and meanwhile, the buckling part 12 arranged oppositely clamps the blocking device 3, so that the buckling stability can be improved;

because one end of the releaser 1, which is far away from the plugging device 3, is fixedly connected with the conveying guide wire 4, the conveying guide wire 4 is pushed to drive the releaser 1 and the plugging device 3 to move in the micro-catheter 5, the protrusion 13 always abuts against the inner wall of the micro-catheter 5 in the moving process, and the reaction force exerted by the inner wall of the micro-catheter 5 on the protrusion 13 can improve the buckling force of the buckling part 12 on the annular groove 31, so that the releaser 1 is prevented from releasing the buckling effect on the plugging device 3 in advance in the process of conveying the plugging device 3, and the operation process and the operation efficiency are influenced;

after the plugging device 3 is delivered to the target position in the aneurysm 2, the micro-catheter 5 is slightly retracted, the protrusion 13 is no longer abutted against the inner wall of the micro-catheter 5, the releaser 1 is unconstrained and is deployed outwards, so that the plugging device 3 is released from being held, the plugging device 3 is left in the aneurysm 2, and then the releaser 1, the delivery guide wire 4 and the micro-catheter 5 are retracted to wait for the next operation to be used again.

In this embodiment, since the development mark is disposed on the latching portion 12, the annular groove 31 is a development portion, and the two portions are matched with each other, the latching state of the releaser 1 and the plugging device 3 can be clearly seen, so as to avoid that when the releaser 1 does not completely release the latching action of the plugging device 3, the releaser 1 starts to be retracted, which causes the plugging device 3 to be dislocated, and further the releaser 1 and the plugging device 3 need to be re-latched, and the position of the plugging device 3 is re-adjusted, which affects the operation progress and the operation efficiency.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (8)

1. A decoupler, comprising:

a proximal end (10) adapted for fixed connection to a delivery guidewire;

at least two elastic arms (11), one end of each elastic arm is connected with the near end (10), a bulge (13) protruding outwards is arranged in the middle section of each elastic arm (11), and each bulge (13) is suitable for abutting against the inner wall of the micro catheter;

and at least two buckling parts (12) which are formed by bending and extending the other end of each elastic arm (11) and are suitable for being clamped with the plugging device.

2. The decoupler as in claim 1, wherein: the included angle between the buckling part (12) and the elastic arm (11) is 90 degrees.

3. The decoupler as in claim 1, wherein: the elastic arms (11) are uniformly arranged along the circumference of the near end (10).

4. The decoupler as in any one of claims 1-3, wherein: the releaser (1) is formed by laser cutting of a memory alloy tube.

5. The decoupler as in claim 4, wherein: the proximal end (10) is cylindrical.

6. The decoupler as in any one of claims 1-3, wherein: the buckling part (12) is provided with a developing mark.

7. The decoupler as in claim 6, wherein: the development mark on the buckling part (12) is suitable for corresponding to the development part of the plugging device.

8. A decoupler (1) according to any one of claims 1-3, characterized in that: the bulge (13) is provided with a developing mark.

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