Medical device release structure and medical system

Abstract

The application relates to the technical field of medical equipment and discloses a medical instrument releasing structure and a medical system. The first end of the first fixing member is connected to the distal end of the push tube, and the second end is provided with a first connecting part; the first end of the second fixing member is provided with a second connecting part, the first connecting part and the second connecting part are detachably connected, and the second end of the second fixing member is connected to the medical instrument; the first connecting part comprises a first clamping wire part and a first clamping groove connected to each other, the first clamping wire part is located on the side of the first clamping groove close to the second fixing member, the first clamping wire part is provided with a notch penetrating through the side wall, the minimum distance between the two boundaries of the notch is smaller than the diameter of the mandrel; the second connecting part is the same in shape as the first connecting part, and the second connecting part comprises a second clamping wire part and a second clamping groove connected to each other; when the first fixing member and the second fixing member are assembled, the first clamping wire part is embedded in the second clamping groove, the second clamping wire part is clamped in the first clamping groove, and the diameter of the mandrel is smaller than or equal to the diameter of the through hole.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more particularly to medical device release structures and medical systems. Background Technology

[0002] Currently, the main dissociation method for interventional medical devices is mechanical dissociation. Mechanical dissociation is the oldest and most developed method, referring to the use of a special mechanical structure and operating device to achieve dissociation. However, because mechanical dissociation primarily involves threaded dissociation, the threads are often non-standard, making processing difficult and costly. During processing, foreign objects remaining at the threads are difficult to detect, and during dissociation, these objects can easily fall into the body, increasing surgical risks and potentially leading to surgical failure.

[0003] Therefore, there is an urgent need for a medical device release structure and medical system to solve the aforementioned problems. Summary of the Invention

[0004] Based on the above, the purpose of this invention is to provide a medical device release structure and medical system that reduces processing difficulty, has high reliability, and simplifies assembly and disassembly steps.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] On one hand, a medical device release structure is provided, including a push tube, a mandrel, a first fixing member and a second fixing member. The first end of the first fixing member is connected to the distal end of the push tube, and the second end of the first fixing member is provided with a first connecting portion. The first end of the second fixing member is provided with a second connecting portion, the first connecting portion and the second connecting portion are detachably connected, and the second end of the second fixing member is connected to the medical device.

[0007] The push tube, the first fixing member, and the second fixing member are provided with through holes;

[0008] The first connecting part includes a first clamping part and a first snap-fit ​​groove connected together. The first clamping part is located on the side of the first snap-fit ​​groove close to the second fixing member. The first clamping part has a notch that penetrates the side wall. The minimum distance between the two boundaries of the notch is less than the diameter of the mandrel.

[0009] The second connecting part has the same shape as the first connecting part, and the second connecting part includes a connected second clamping part and a second snap-fit ​​groove;

[0010] When the first fixing member and the second fixing member are assembled, the first clamping part is embedded in the second snap-fit ​​groove, and the second clamping part is snapped into the first snap-fit ​​groove. The diameter of the mandrel is less than or equal to the diameter of the through hole.

[0011] As a preferred technical solution for a medical device release structure, the side wall of the first snap-fit ​​groove near the first clamping part is inclined.

[0012] As a preferred technical solution for a medical device release structure, the angle A of the inclined surface relative to the axis of the through hole is greater than or equal to 25° and less than or equal to 45°.

[0013] As a preferred technical solution for a medical device release structure, the encirclement angle B of the first clamping portion relative to the axis of the through hole is greater than or equal to 150° and less than or equal to 270°.

[0014] As a preferred technical solution for a medical device release structure, the second fixing member has a flexible part at the end away from the first fixing member.

[0015] As a preferred technical solution for the release structure of a medical device, the flexible part is spring-shaped.

[0016] As a preferred technical solution for a medical device release structure, the second fixing member is made of a biodegradable material.

[0017] As a preferred technical solution for a medical device release structure, the first end of the first fixing member is connected to the distal end of the push tube by welding, bonding or fasteners.

[0018] As a preferred technical solution for a medical device release structure, the mandrel is a thin wire or a microguidewire.

[0019] On the other hand, a medical system is provided, including the medical device release structure described in any of the above embodiments.

[0020] The beneficial effects of this invention are as follows:

[0021] This invention provides a medical device release structure and medical system. During assembly, the first clamping part is embedded in the second locking groove, and the second clamping part is engaged with the first locking groove, achieving an interlocking connection between the first and second connecting parts. The mandrel passes through a through hole, allowing it to move only axially along the through hole. The mandrel cannot be dislodged through the notch in the first clamping part. Therefore, the mandrel restricts the radial displacement of the first and second connecting parts, preventing detachment and improving operational reliability. After the medical device is transported to a preset position, the mandrel is first dislodged from the connection position of the first and second connecting parts. At this point, the first and second connecting parts can move radially along the through hole, achieving detachment of the first and second fixing components. Finally, the push tube, mandrel, and first fixing component are removed from the human body. Compared to existing technologies, this invention reduces processing difficulty, offers high reliability, and simplifies assembly and disassembly steps. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the medical device release structure provided in a specific embodiment of the present invention;

[0024] Figure 2 This is an exploded view of the medical device release structure provided in a specific embodiment of the present invention;

[0025] Figure 3 This is a structural schematic diagram of the second fastener provided in a specific embodiment of the present invention;

[0026] Figure 4 This is a front view of the first fastener provided in a specific embodiment of the present invention;

[0027] Figure 5 This is a right view of the first fastener provided in a specific embodiment of the present invention.

[0028] The markings in the image are as follows:

[0029] 1. Push management;

[0030] 2. Mandrel;

[0031] 3. First fastener; 31. First connecting part; 311. First clamping part; 3111. Notch; 312. First snap-fit ​​groove; 313. Inclined surface;

[0032] 4. Second fastener; 41. Second connecting part; 411. Second clamping part; 412. Second snap-fit ​​groove; 42. Flexible part. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0034] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0037] like Figures 1-4As shown, this embodiment provides a medical device release structure, which includes a push tube 1, a spindle 2, a first fixing member 3, and a second fixing member 4. Specifically, the first end of the first fixing member 3 is connected to the distal end of the push tube 1, and the second end of the first fixing member 3 is provided with a first connecting portion 31; the first end of the second fixing member 4 is provided with a second connecting portion 41, and the first connecting portion 31 and the second connecting portion 41 are detachably connected, and the second end of the second fixing member 4 is connected to the medical device; the push tube 1, the first fixing member 3, and the second fixing member 4 are provided with a through hole; the first connecting portion 31 includes a connected first wire clamping portion 311 and a first locking groove 312, the first wire clamping portion 311 being located on the side of the first locking groove 312 near the second fixing member 4, the first... The clamping portion 311 has a notch 3111 penetrating the sidewall. The minimum distance between the two boundaries of the notch 3111 is less than the diameter of the mandrel 2, so that the mandrel 2 cannot be moved out of the notch 3111. The second connecting portion 41 has the same shape as the first connecting portion 31. The second connecting portion 41 includes a connected second clamping portion 411 and a second locking groove 412. When the first fixing member 3 and the second fixing member 4 are assembled, the first clamping portion 311 is embedded in the second locking groove 412, and the second clamping portion 411 is locked in the first locking groove 312. The diameter of the mandrel 2 is less than or equal to the diameter of the through hole, and the mandrel 2 can pass through the through hole. In this embodiment, the mandrel 2 is a thin wire or a microguidewire, and the push tube 1 can be a microcatheter used to support the guidewire during coronary surgery. It should be noted that in this embodiment, the distal end refers to the end away from the operator when using the medical device release structure.

[0038] During assembly, the first clamping part 311 is embedded in the second locking groove 412, and the second clamping part 411 is engaged with the first locking groove 312, realizing the interlocking connection of the first connecting part 31 and the second connecting part 41. The mandrel 2 passes through the through hole. At this time, the mandrel 2 can only move axially along the through hole. The mandrel 2 cannot be dislodged through the notch 3111 of the first clamping part 311. Therefore, the mandrel 2 restricts the radial displacement of the first connecting part 31 and the second connecting part 41, preventing the first connecting part 31 and the second connecting part 41 from separating, thus improving the reliability of operation. After the medical device is transported to the preset position, the mandrel 2 is first dislodged from the connection position of the first connecting part 31 and the second connecting part 41. At this time, the first connecting part 31 and the second connecting part 41 can move radially along the through hole, realizing the separation of the first fixing member 3 and the second fixing member 4. Finally, the push tube 1, the mandrel 2 and the first fixing member 3 are removed from the human body. Compared with the prior art, this embodiment reduces the processing difficulty, has high reliability, and the assembly and disassembly steps are simple to operate.

[0039] Furthermore, the first end of the first fixing member 3 is connected to the far end of the push tube 1 by welding, bonding or fasteners, thereby achieving a fixed connection between the first fixing member 3 and the push tube 1.

[0040] like Figures 2-4As shown, preferably, the side wall of the first snap-fit ​​groove 312 near the first clamping part 311 is an inclined surface 313. When it is necessary to separate the first fixing member 3 and the second fixing member 4, it is only necessary to drag the push tube 1, and the second clamping part 411 moves along the inclined surface 313. Guided by the inclined surface 313, it disengages from the first snap-fit ​​groove 312. The second clamping part 411 does not need to move radially along the through hole, which helps to separate the first connecting part 31 and the second connecting part 41, and the operation is simple. Similarly, the side wall of the second snap-fit ​​groove 412 near the second clamping part 411 is also an inclined surface 313.

[0041] More preferably, the angle A between the inclined surface 313 and the axis of the through hole is greater than or equal to 25° and less than or equal to 45°. Specifically, the angle A between the inclined surface 313 and the axis of the through hole can be 25°, 30°, 35°, 40° or 45°, etc. A smaller included angle helps to separate the first fixing member 3 and the second fixing member 4, and this angle is not unique.

[0042] Furthermore, such as Figure 5 As shown, the encirclement angle B of the first clamping part 311 relative to the axis of the through hole is greater than or equal to 150° and less than or equal to 270°. Specifically, the encirclement angle B of the first clamping part 311 relative to the axis of the through hole can be 150°, 180°, 210°, 240°, or 270°, etc. Among them, the first clamping part 311 corresponds to the second locking groove 412. The encirclement angle B of the first clamping part 311 relative to the axis of the through hole should not be too large, otherwise the side wall with the second locking groove 412 will be too small, the strength will be weak, and it will be easy to be damaged. The encirclement angle B of the first clamping part 311 relative to the axis of the through hole should not be too small, otherwise the notch 3111 will be too large, making it easy for the mandrel 2 to fall out of the notch 3111, and failing to achieve the locking effect.

[0043] like Figure 3 As shown, during the disengagement of the first fixing member 3 and the second fixing member 4, radial movement relative to the through hole occurs between the first connecting part 31 and the second connecting part 41. The flexible part 42 facilitates deformation of the second connecting part 41, aiding in disengagement. In this embodiment, the flexible part 42 is spring-shaped, made of a flexible material, or has multiple hollow structures to allow for deformation. In this embodiment, the end of the flexible part 42 away from the second fixing member 4 is connected to the medical device. Of course, in other embodiments, when the medical device is a spring coil, the end of the second fixing member 4 away from the first fixing member 3 can also be directly connected to the medical device.

[0044] Preferably, the second fixation member 4 is made of a biodegradable material, specifically polylactic acid. After the first fixation member 3 and the second fixation member 4 separate, the second fixation member 4 and the medical device remain inside the body. The degradation of the second fixation member 4 reduces the size of the medical device and decreases surgical risks.

[0045] This embodiment also provides a medical system, which includes a medical device and any of the above-mentioned medical device release structures. The second end of the second fixing member 4 is connected to the medical device to realize the rapid separation of the push tube 1 from the medical device.

[0046] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A medical device release structure, characterized in that, The device includes a push tube (1), a spindle (2), a first fixing member (3), and a second fixing member (4). The first end of the first fixing member (3) is connected to the distal end of the push tube (1), and the second end of the first fixing member (3) is provided with a first connecting part (31). The first end of the second fixing member (4) is provided with a second connecting part (41). The first connecting part (31) and the second connecting part (41) are detachably connected. The second end of the second fixing member (4) is connected to a medical device. The push tube (1), the first fixing member (3) and the second fixing member (4) are provided with through holes; The first connecting part (31) includes a first clamping part (311) and a first snap-fit ​​groove (312) connected together. The first clamping part (311) is located on the side of the first snap-fit ​​groove (312) close to the second fixing member (4). The first clamping part (311) is provided with a notch (3111) that penetrates the side wall. The minimum distance between the two boundaries of the notch (3111) is smaller than the diameter of the mandrel (2). The second connecting part (41) has the same shape as the first connecting part (31), and the second connecting part (41) includes a connected second clamping part (411) and a second snap-fit ​​groove (412); When the first fixing member (3) and the second fixing member (4) are assembled, the first clamping part (311) is embedded in the second snap-fit ​​groove (412), and the second clamping part (411) is snapped into the first snap-fit ​​groove (312). The diameter of the mandrel (2) is less than or equal to the diameter of the through hole.

2. The medical device release structure according to claim 1, characterized in that, The side wall of the first snap-fit ​​groove (312) near the first clamping part (311) is a slope (313).

3. The medical device release structure according to claim 2, characterized in that, The angle A of the inclined plane (313) relative to the axis of the through hole is greater than or equal to 25° and less than or equal to 45°.

4. The medical device release structure according to claim 1, characterized in that, The first clamping part (311) has an encirclement angle B relative to the axis of the through hole that is greater than or equal to 150° and less than or equal to 270°.

5. The medical device release structure according to claim 1, characterized in that, The second fixing member (4) has a flexible part (42) at the end away from the first fixing member (3).

6. The medical device release structure according to claim 5, characterized in that, The flexible part (42) is spring-shaped.

7. The medical device release structure according to claim 1, characterized in that, The second fastener (4) is made of a biodegradable material.

8. The medical device release structure according to claim 1, characterized in that, The first end of the first fastener (3) is connected to the far end of the push tube (1) by welding, bonding or fasteners.

9. The medical device release structure according to claim 1, characterized in that, The mandrel (2) is a thin wire or a micro guidewire.

10. A medical system, characterized in that, Includes the medical device release structure as described in any one of claims 1-9.

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