CN215384327U - Inclined wedge releasing mechanism - Google Patents

Abstract

The utility model is applicable to the technical field of medical instruments, and discloses a slanting wedge releasing mechanism. The utility model provides a slanting wedge releasing mechanism, which comprises a plugging support and a releasing mechanism body for releasing the plugging support; the release mechanism body comprises a catheter, a guide wire which is movably arranged in the catheter, a bracket stop block arranged on the plugging bracket and a sliding block arranged in the catheter; the sliding block cannot penetrate out of the far end of the catheter; the sliding block is provided with an inclined wedge hole for penetrating the guide wire, and the sliding block is provided with a channel for the support stop block to penetrate out along the far end of the guide pipe; the guide wire penetrates through the inclined wedge hole and enters the channel to limit the support stop block. The plugging support is connected to the catheter through the guide wire, the support stop block and the sliding block, the guide wire in the sliding block is drawn out, the plugging support can be released, and the release process is simple.

Description

Inclined wedge releasing mechanism

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a slanting wedge releasing mechanism.

Background

Intracranial aneurysm refers to localized bulging and dilatation of the vessel wall of an artery due to the action of acquired pathological factors or congenital malformations. Intracranial aneurysm has a very high incidence rate of about 5%, and its course is often more secret, rupture bleeding is often more sudden, and the fatality rate or disability rate is also high. The lethality rate of the first rupture bleeding is 8% -45%, the lethality rate in one year is higher than 60%, and the lethality rate in 2 years is more than 85%. Therefore, it is globally emphasized that early diagnosis and treatment of intracranial aneurysms is of great clinical importance to improve patient survival and quality of life. In the field of vascular interventional therapy, stent implantation is a common treatment means, and at present, the commonly used intravascular stents are mainly made of biologically inert metal or alloy, and are commonly made of stainless steel, nickel-titanium alloy and the like. However, the release mechanism at present is complex in release process and difficult to operate.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a slanting wedge releasing mechanism, wherein a plugging support is connected to a catheter through a guide wire, a support stop block and a sliding block, and the release of the plugging support can be realized by drawing out the guide wire in the sliding block.

In order to achieve the aim, the utility model provides a slanting wedge releasing mechanism, which comprises a plugging bracket and a releasing mechanism body for releasing the plugging bracket; the release mechanism body comprises a catheter, a guide wire which is movably arranged in the catheter, a bracket stop block arranged on the plugging bracket and a sliding block arranged in the catheter; the sliding block cannot penetrate out of the far end of the catheter; the sliding block is provided with an inclined wedge hole for penetrating the guide wire, and the sliding block is provided with a channel for the support stop block to penetrate out along the far end of the guide pipe; the guide wire penetrates through the inclined wedge hole and enters the channel to limit the support stop block.

Preferably, a stop is provided at the distal end of the catheter to prevent the slider from passing out of the distal end of the catheter.

Preferably, the passages are through holes distributed in the axial direction.

Preferably, the bracket stopper is a ball.

Preferably, a limiting block is arranged between the plugging bracket and the catheter.

Preferably, the material of the block is one or more of stainless steel, shape memory metal, nickel titanium alloy and shape memory polymer.

Preferably, the guide wire and the catheter are both made of flexible materials.

Compared with the prior art, the slanting wedge releasing mechanism provided by the utility model has the beneficial effects that:

1. the plugging support is limited through the guide wire and the sliding block, and only the guide wire needs to be withdrawn when the plugging support is released, so that the plugging support is simple to operate and simple in structure.

2. In the releasing process, the catheter blocks the limiting block of the plugging support to prevent the plugging support from moving towards the near end, and the releasing precision is high.

The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.

Drawings

FIG. 1 is a schematic structural diagram of a wedge release mechanism according to an embodiment of the present invention.

FIG. 2 is a schematic view of the guide wire retraction of a wedge release mechanism according to an embodiment of the present invention.

FIG. 3 is a schematic view of the structure of the withdrawal of the guide tube of the slanting wedge releasing mechanism according to the embodiment of the present invention

In the figure: 1. plugging the stent; 2. a conduit; 21. a blocking block; 3. a guide wire; 4. a bracket stop block; 5. a slider; 51. an inclined wedge hole; 52. a channel; 6. and a limiting block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the utility model and not to limit the scope of the utility model. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

In the description of the present invention, it should be noted that when an element is referred to as being "fixed" or "disposed" to another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present invention, it should be noted that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships in which the products of the present invention are conventionally placed when used, and are merely used for convenience of describing and simplifying the 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," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. As used herein, the term "clinician" refers to a doctor, surgeon, nurse, or any other care provider, and may include support personnel. The term "proximal" will refer to the portion of the device or component thereof that is closer to the clinician, and the term "distal" will refer to the portion of the device or component thereof that is further from the clinician.

Referring to fig. 1 and 2, an embodiment of the utility model provides a wedge release mechanism, which comprises a plugging support 1 and a release mechanism body for releasing the plugging support 1. The releasing mechanism body comprises a catheter 2, a guide wire 3 which is movably arranged in the catheter 2, a stent stop block 4 arranged on the plugging stent 1 and a slide block 5 arranged in the catheter 2. The slider 5 cannot pass out of the distal end of the catheter 2. The slide block 5 is provided with a slanting wedge hole 51 for passing through the guide wire 3, and the slide block 5 is provided with a channel 52 for the stent stopper 4 to pass through along the distal end of the catheter 2. The guide wire 3 passes through the inclined wedge hole 51 and enters the channel 52 to limit the bracket stop 4. Channel 52 and carriage stop 4 are sized to fit, or channel 52 is sized slightly larger than carriage stop 4, and carriage stop 4 is free to move within channel 52. When the guide wire 3 enters the channel 52 along the inclined wedge hole 51, the channel 52 is reduced in size, and the guide wire 3 blocks the path of the distal movement of the stent stopper 4, so that the guide wire cannot be separated from the slider 5. The clinician only needs to move the guide wire 3 to the near end (i.e. withdraw), the guide wire 3 is separated from the channel 52 or completely separated from the sliding block 5, the bracket stop block 4 can freely penetrate out of the sliding block 5 to complete the release, the operation is simple, and the structure is simple.

Referring to fig. 1, in an alternative embodiment, a stop 21 is provided at the distal end of the catheter 2 to prevent the slider 5 from passing out of the distal end of the catheter 2. The stop 21 may be in the form of a ring or a separate block, and it should be understood that any structure that would prevent the slider 5 from passing through the distal end of the catheter 2 is within the scope of the claimed stop 21.

Referring to fig. 3, in an alternative embodiment, the channel 52 is a through hole distributed along the axial direction, the moving space is longer, and even the stent stopper 4 can move to the proximal end to enter the catheter 2, so as to prevent the channel from being too short in length, and the stent stopper 4 is compressed, and even the structure of the occlusion stent 1 is damaged, which affects the use.

Referring to fig. 3, in an alternative embodiment, the stent stopper 4 is a sphere with smooth surface and will not scratch the blood vessel when left in the blood vessel.

Referring to fig. 2, in an alternative embodiment, a stop block 6 is disposed between the occluding stent 1 and the catheter 2. When the guide wire 3 is withdrawn, the limiting block 6 props against the far end of the catheter 2, the plugging support 1 cannot be withdrawn together with the guide wire 3, and the releasing precision is higher.

In an alternative embodiment, both the guide wire 3 and the catheter 2 are made of a flexible material. The catheter 2 and the guide wire 3 are used in blood vessels, and the flexible materials are not easy to damage the blood vessels.

The specific using process is as follows:

during the intervention, the position of the occlusion stent 1 to be released is first determined by angiography or other existing medical techniques. The plugging stent 1 is loaded in a sheath or a microcatheter and transported to a designated position together. The plugging bracket 1 is unfolded at a designated position after being separated from the micro-catheter. At this time, the guide wire 3 is inserted into the inclined wedge hole 51 of the slider 5, and the distal end of the guide wire 3 enters the channel 52. The stent block 4 is now blocked by the guidewire from passing out of the distal end of the slider 5 (as shown in fig. 1).

The distal end of the catheter 2 is urged against the stop block 6 (as shown in fig. 2) when the guidewire 3 is withdrawn, or the catheter 2 is already urged against the stop block 6 when the microcatheter is delivered to a desired location. Keeping the catheter 2 still, the clinician withdraws the guidewire 3 proximally, the occluding stent 1 does not withdraw proximally, the guidewire 3 will slowly disengage from the beveled wedge opening 51, and the stent stop 4 can pass out of the channel 52 of the slider 5 (see fig. 2).

Finally, the catheter 2 is withdrawn, so that the bracket stop block 4 is completely separated from the slide block 5, and the plugging bracket 1 is successfully released.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (6)

1. A slanting wedge releasing mechanism comprises a plugging bracket (1) and a releasing mechanism body used for releasing the plugging bracket (1); the method is characterized in that: the release mechanism body comprises a catheter (2), a guide wire (3) movably arranged in the catheter (2), a bracket stop block (4) arranged on the plugging bracket (1) and a slide block (5) arranged in the catheter (2); the sliding block (5) can not penetrate out of the far end of the catheter (2); the sliding block (5) is provided with an inclined wedge hole (51) for penetrating through the guide wire (3), and the sliding block (5) is provided with a channel (52) for the support stop block (4) to penetrate out along the far end of the guide pipe (2); the guide wire (3) penetrates through the inclined wedge hole (51) and enters the channel (52) to limit the support stop block (4).

2. A miter wedge release mechanism as claimed in claim 1, wherein: a stop block (21) for preventing the sliding block (5) from penetrating out of the far end of the catheter (2) is arranged at the far end of the catheter (2).

3. A wedge release mechanism according to claim 1 or claim 2, wherein: the channels (52) are through holes distributed along the axial direction.

4. A miter wedge release mechanism as claimed in claim 1, wherein: the support stop block (4) is a sphere.

5. A wedge release mechanism according to claim 1, 2 or 4, wherein: a limiting block (6) is arranged between the plugging bracket (1) and the catheter (2).

6. A miter wedge release mechanism as claimed in claim 1, wherein: the guide wire (3) and the catheter (2) are both made of flexible materials.

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