CN215384329U - Releasing mechanism with shifting block for blocking - Google Patents

Abstract

The utility model is applicable to the technical field of medical instruments, and discloses a release mechanism with a shifting block for blocking. The utility model provides a release mechanism with a shifting block for blocking, which comprises a plugging support and a release 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 slide block arranged in the catheter; the sliding block can not penetrate out of the far end of the catheter; a channel for the bracket stop block to penetrate out along the far end of the catheter is arranged on the sliding block, and a shifting block is rotatably arranged in the channel; the sliding block is provided with a guide wire hole communicated with the channel, and a guide wire penetrates through the guide wire hole to enter the channel to be matched with the shifting block to limit the support stop block. The shifting block is controlled to limit the bracket stop block through the guide wire, the guide wire is inserted into the channel to complete limiting, the guide wire is withdrawn to complete releasing, and the operation is simple and convenient.

Description

Releasing mechanism with shifting block for blocking

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a release mechanism with a shifting block for blocking.

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 release mechanism with a shifting block for blocking, wherein a plugging support is connected to a catheter through a guide wire, a shifting 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 purpose, the utility model provides a release mechanism with a shifting block for blocking, which comprises a plugging support and a release 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; a channel for the bracket stop block to penetrate out along the far end of the catheter is arranged on the sliding block, and a shifting block is rotatably arranged in the channel; the sliding block is provided with a guide wire hole communicated with the channel, and the guide wire penetrates through the guide wire hole to enter the channel and is matched with the shifting block to limit the support stop block.

Preferably, the shifting block comprises a rotating shaft arranged on the sliding block and two rotating pieces arranged on the rotating shaft; when the shifting block limits the support stop block, the two rotating pieces are both positioned at the far end of 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 channels are blind 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 guide wire and the catheter are both made of flexible materials.

Preferably, the wire guide holes are through holes distributed along the axial direction.

Compared with the prior art, the release mechanism with the shifting block for blocking provided by the utility model has the beneficial effects that:

1. the plugging support is limited through the guide wire, the shifting block and the sliding block, only the guide wire needs to be withdrawn when the plugging support is released, and 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 release mechanism with a dial block barrier according to an embodiment of the present invention.

FIG. 2 is a schematic view of a release mechanism with a paddle block for guiding the wire to be withdrawn according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a release mechanism with a dial block for blocking completion of release according to an embodiment of the present invention.

Fig. 4 is an enlarged schematic structural diagram of a release mechanism slider with a dial block barrier according to an 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. a channel; 52. a wire guide hole; 53. shifting blocks; 531. a rotating shaft; 532. a rotating sheet; 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 4, an embodiment of the present invention provides a release mechanism with a dial block barrier, including a blocking bracket 1 and a release mechanism body for releasing the blocking bracket 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 channel 51 for the bracket stop 4 to pass through along the far end of the catheter 2, and a shifting block 53 is rotatably arranged in the channel 51. The sliding block 5 is provided with a guide wire hole 52 communicated with the channel 51, and the guide wire 3 passes through the guide wire hole 52 and enters the channel 51 to be matched with the shifting block 52 to limit the support stop 4. The carriage stop 4 is placed into the channel 51 with the paddle 53 distal to the axis of symmetry of the carriage stop 4. The guide wire 3 penetrates out of the sliding block 5, and the shifting block 53 rotates anticlockwise to limit the support stop block 4.

Referring to fig. 1 and 3, in an alternative embodiment, the dial 53 includes a rotating shaft 531 disposed on the slider 5 and two rotating pieces 532 disposed on the rotating shaft 531. When the shifting block 53 limits the support stopper 4, the two rotation pieces 532 are both located at the far end of the support stopper 4. When the shifting block 53 is in the initial state, the guide wire 3 does not penetrate into the guide wire hole 52, and the distance between the lowest part of the lower rotary plate 532 and the bottom of the channel 51 is larger than the diameter of the bracket stop 4. The carriage stop 4 is accessible to the proximal end of the paddle 53. The guide wire 3 passes through the guide wire hole 52 and out of the slider 5, so that the rotating shaft 531 rotates counterclockwise, the upper rotating piece 532 is stopped by the guide wire 3, the distance between the lowermost part of the lower rotating piece 532 and the bottom of the channel 51 becomes smaller than the diameter of the support stopper 4, and the support stopper 4 cannot be removed from the channel 51 (the state of the dial 53 is rotated from fig. 3 to the state of fig. 1).

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. 4, in an alternative embodiment, the passages 51 are blind holes distributed along the axial direction. The guide wire holes 52 are through holes distributed in the axial direction. The channel 51 is blind and can be better provided with a guide wire hole 52, so that the guide wire 3 can be better inserted into the channel 51 to limit the bracket stop 4.

Referring to fig. 1, in an alternative embodiment, the bracket stop 4 is a ball. The surface of the sphere is smooth, and the sphere can not scratch blood vessels when being left in the blood vessels.

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. The guide wire 3 is inserted into the channel 51 of the slider 5. At this point, the bracket stop 4 is stopped by the lower turning tab 532 and the bracket stop 4 cannot move distally away from the slider (as shown in fig. 1).

The distal end of the catheter 2 is urged against the stop block 6 when the guidewire 3 is withdrawn again (as shown in fig. 2), 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 guide wire 3 towards the proximal end, the plugging bracket 1 will not move towards the proximal end together, the guide wire 3 will slowly break away from the channel 51, and the upper rotary piece 532 will not be resisted by the guide wire 3.

Finally, the catheter 2 is retracted, the rotating shaft 531 rotates clockwise to increase the distance between the rotating sheet 532 and the channel 51, the stent stopper 4 can smoothly separate from the slider, and the plugging stent 1 is successfully released (as shown in fig. 3). The clinician can withdraw the catheter 2 as the guidewire 3 exits the channel 51, or can withdraw the catheter 2 with the guidewire 3 completely free of the slider 5 or the catheter 2.

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 (8)

1. A release mechanism with a shifting block for blocking comprises a plugging support (1) and a release mechanism body for releasing the plugging support (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); a channel (51) for the bracket stop block (4) to penetrate out along the far end of the catheter (2) is arranged on the sliding block (5), and a shifting block (53) is rotatably arranged in the channel (51); be equipped with on slider (5) with wire guide hole (52) of passageway (51) intercommunication, seal wire (3) are followed wire guide hole (52) pass the entering passageway (51) with shifting block (53) cooperation is right support dog (4) are spacing.

2. The release mechanism with a paddle stop of claim 1, wherein: the shifting block (53) comprises a rotating shaft (531) arranged on the sliding block (5) and two rotating sheets (532) arranged on the rotating shaft (531); when the shifting block (53) limits the support stop block (4), the two rotating pieces (532) are both positioned at the far end of the support stop block (4).

3. The release mechanism with a paddle stop of 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).

4. The release mechanism with a paddle stop of claim 1, wherein: the channels (51) are blind holes distributed along the axial direction.

5. The release mechanism with a paddle stop of claim 1, wherein: the support stop block (4) is a sphere.

6. The release mechanism with a paddle stop of claim 1, wherein: a limiting block (6) is arranged between the plugging bracket (1) and the catheter (2).

7. The release mechanism with a paddle stop of claim 1, wherein: the guide wire (3) and the catheter (2) are both made of flexible materials.

8. The release mechanism with a paddle stop of claim 1, wherein: the wire guide holes (52) are through holes distributed along the axial direction.

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