Medical device implant delivery devices

Abstract

The present invention provides a medical device implant delivery device, relating to the field of medical devices, comprising a microcatheter, an elongated tube, a control cable, and a locking assembly. In the locking assembly, a first through-hole is provided at the rear end of a first locking portion; a central hole is provided axially through the second locking portion within the second locking portion; a limiting portion is connected to the second locking portion, and a second through-hole is provided on the limiting portion. In the locked state, the rear end of the first locking portion passes through the second through-hole, and the control cable passes through the central hole and the first through-hole, or the front end of the limiting portion passes through the first through-hole, and the control cable passes through the central hole and the second through-hole. The present invention at least alleviates the technical problem in existing mechanically detachable medical device implant delivery devices, where once the medical device implant is detached from the delivery tube, it cannot be retracted into the delivery tube, potentially causing accidental occlusion.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a medical device implant delivery device. Background Art

[0002] Percutaneous transcatheter embolization is defined as the intravascular deposition of a device or agent (solid or liquid) that produces intentional vascular occlusion. Embolic occlusion can be performed at any level, from the aorta or vein to the capillary bed, and can be temporary or permanent in nature. During the procedure, an embolic agent is injected or delivered into the target vessel via a catheter, causing vascular occlusion and achieving the desired therapeutic goal.

[0003] Embolization can be used to eliminate congenital or acquired abnormal vasculature, thereby improving clinical conditions. This approach has also been used to occlude normal vasculature to alleviate tumors and tissue ablation. These normal or abnormal vessels can cause massive bleeding or hemodynamic disturbances. With the advent of more advanced hardware such as microcatheters, embolic materials, and high-resolution digital imaging, this approach has been recognized for its safety and effectiveness. Due to the continuous improvement of physician expertise and the low incidence of surgical complications, it has become the preferred treatment for certain diseases.

[0004] Embolic materials include mechanical embolic materials, which are generally made of stainless steel, platinum, and nickel-titanium alloys and wrapped with polymer fibers. Embolization procedures refer to these materials as medical device implants. Medical device implants can be divided into pushable and detachable types based on their delivery or release mechanism. Push-type medical device implants consist of a preloaded implant that is inserted into a catheter. After insertion, the implant can be pushed into place using an implant pusher or guidewire. Alternatively, saline injection can be used to deliver the implant to the appropriate location. The release methods of detachable medical device implants include electrolytic release, water (hydraulic) release and mechanical release. For electrolytic release medical device implants, their stability after release failure is higher than that of hydrolytic release and mechanical release, but their release time is longer, the release area is hard, and the incidence of complications is higher; for hydrolytic release medical device implants, their release is rapid and the microcatheter head deflects slightly during release, making it easy to achieve precise positioning of the implant, but the impact of water flow will have a displacement effect on the implantation of the medical device implant; for mechanical release medical device implants, their release time is short, the catheter head is stable during release, the displacement is small, and there is no impact force generated by the hydrolytic release method; after comprehensive comparison, it can be seen that the mechanical release method has the lowest risk.

[0005] Studies have shown that traditional push-type medical device implants cannot be withdrawn in time when the implant position is inappropriate, so they are gradually being replaced by detachable medical device implants. Among them, mechanically detachable medical device implants have the advantages of good softness, simple operation, high success rate, and strong controllability, and are gradually being adopted by interventional physicians.

[0006] The existing mechanically detachable medical device implant delivery device mainly includes a delivery tube, a control cable and a locking assembly. Specifically, in a type of mechanically detachable medical device implant delivery device in the prior art, the delivery tube includes a microcatheter and a slender tube, the slender tube passes through the microcatheter, the control cable passes through the slender tube and there is a large friction between the control cable and the slender tube, the locking assembly includes a first locking part connected to the rear end of the medical device implant and a second locking part connected to the front end of the slender tube, the control cable locks the first locking part to the second locking part; before release, the first locking part and the second locking part are both located inside the microcatheter, and as the microcatheter is relative to the first locking part, the first locking part and the second locking part are locked. By pushing the slender tube forward, the first locking part and the second locking part can be slowly pushed out of the microcatheter, and then the control cable is withdrawn backward relative to the microcatheter, thereby separating the first locking part from the second locking part to release the medical device implant; a more detailed structure is as follows: the first locking part and the second locking part are both tubular structures with grooves on the tube wall, the grooves are connected to the tube cavity, and the top surface of the groove body is a corrugated surface extending along the axial direction of the tubular structure. Before release, the corrugated groove top surface of the first locking part and the corrugated groove top surface of the second locking part are engaged with each other. The control cable passes through the lumen of the elongated tube, the lumen of the second locking portion, and the lumen of the first locking portion. When release is required, the control cable is withdrawn to release the medical device implant, and the elongated tube can then be withdrawn from the body. In another type of mechanically releasable medical device implant delivery device in the prior art, the control cable passes through a microcatheter or elongated tube serving as a delivery tube. The locking assembly includes a first locking portion connected to the rear end of the medical device implant and a second locking portion connected to the front end of the control cable. Before release, the first and second locking portions are both located within the delivery tube and interlock with each other. As the control cable is pushed forward relative to the delivery tube, the first and second locking portions are slowly pushed out of the delivery tube, thereby disengaging the first locking portion from the second locking portion to release the medical device implant. A more detailed structure of the device is often as follows: the first and second locking portions are interlocking hook-shaped structures, or the first and second locking portions (not shown) are interlocking protrusion and groove structures. The protrusion can be, but is not limited to, a spherical protrusion.

[0007] The following is a further explanation of the first and second prior art structures based on the examples of the above-mentioned prior art in order: In the prior art, in the first prior art structure, the mutually interlocking portion of the first locking portion and the second locking portion in the locking assembly is a simple mutual interlocking between grooves. The control cable passes through the groove portion of the first locking portion and the second locking portion, and the first locking portion and the second locking portion cannot be firmly restrained. Once the first locking portion and the second locking portion are pushed out of the microcatheter, the first locking portion and the second locking portion become loose, affecting the selection and control of the implantation angle. Moreover, due to the misalignment caused by the loosening between the first locking portion and the second locking portion, it is impossible to retract the medical device implant into the interior of the microcatheter. In the second prior art structure, after the first locking portion is pushed forward, it is even more impossible to retract the medical device implant into the delivery tube.

[0008] In summary, existing mechanically detachable medical device implant delivery devices have at least one problem: once the medical device implant is detached from the delivery tube, it cannot be withdrawn into the delivery tube, which may cause accidental occlusion. After an accidental occlusion, the incorrectly released medical device implant can only be removed from the human body by using another loop method or other methods. The operation is complicated, not conducive to the rapid completion of the operation, and it is easy to increase surgical trauma. Summary of the Invention

[0009] The purpose of the present invention is to provide a medical device implant delivery device to alleviate the technical problems existing in the prior art.

[0010] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0011] An embodiment of the present invention provides a medical device implant delivery device, comprising a microcatheter, an elongated tube, a control cable, and a locking assembly; the elongated tube passes through the microcatheter, the control cable is installed in the elongated tube, and the rear end of the control cable is fixed to the elongated tube; the locking assembly comprises a first locking portion and a second locking portion, the first locking portion being configured to connect to the rear end of the medical device implant, and the second locking portion being connected to the front end of the elongated tube;

[0012] A first through-hole is provided at the rear end of the first locking portion; a central hole axially penetrating the second locking portion is provided inside the second locking portion; a limiting portion is connected to the second locking portion, and a second through-hole is provided on the limiting portion;

[0013] In the locked state: the rear end of the first locking part passes through the second through-hole, and the control cable passes through the center hole and the first through-hole, or the front end of the limiting part passes through the first through-hole, and the control cable passes through the center hole and the second through-hole.

[0014] In an optional embodiment, a rear end of the first locking portion is provided with a rear extension portion, the first through-hole is provided at the rear end of the rear extension portion, and the rear end of the rear extension portion is bent in a direction away from the central axis of the first locking portion;

[0015] The limiting portion is obliquely arranged inside the central hole of the second locking portion;

[0016] In the locked state, the rear end of the rear extension portion passes through the second through-hole on the limiting portion, and the front end of the control cable passes through the central hole and the first through-hole.

[0017] In an optional embodiment, the rear extension is formed into a semi-annular structure.

[0018] In an optional embodiment, a first extension portion is provided at the rear end of the first locking portion, and the first through-hole is provided in the first extension portion;

[0019] The rear end of the limiting portion is connected to the front end edge of the second locking portion, the second through-hole is provided at the front end of the limiting portion, and the front end of the limiting portion is bent toward the central axis of the second locking portion;

[0020] In the locked state, the front end of the limiting portion passes through the first through-hole, and the front end of the control cable passes through the central hole and the second through-hole.

[0021] In an optional embodiment, the first extension portion is a semi-annular structure; and the limiting portion is a long strip structure.

[0022] In an optional embodiment, the second locking portion is integrally formed with the elongated tube.

[0023] In an optional embodiment, the first locking portion includes a main body and a connecting portion that are integrally connected, the first through-hole is provided in the main body, and the connecting portion is used to be inserted into and fixedly connected to the rear end of the medical device implant.

[0024] In an optional embodiment, at least one tube cutting groove extending along the axial direction of the slender tube is opened on the tube wall of the slender tube.

[0025] In an optional embodiment, a breaking portion for breaking the slender tube is provided at the rear end of the slender tube.

[0026] In an optional embodiment, a control cable fixing groove connected to the tube cavity of the slender tube is opened on the tube wall at the rear end of the slender tube, and the rear end of the control cable is fixedly connected to the inner wall of the groove body of the control cable fixing groove; the breaking portion is arranged at the rear end of the slender tube and is located at the front end of the control cable fixing groove.

[0027] The embodiments of the present invention can achieve the following beneficial effects:

[0028] An embodiment of the present invention provides a medical device implant delivery device, comprising a microcatheter, an elongated tube, a control cable, and a locking assembly; the elongated tube passes through the microcatheter, the control cable is installed in the elongated tube, and the rear end of the control cable is fixed to the elongated tube; the locking assembly comprises a first locking portion and a second locking portion, the first locking portion is used to connect to the rear end of the medical device implant, and the second locking portion is connected to the front end of the elongated tube. The first locking portion is provided with a first through-hole at the rear end; the second locking portion is provided with a central hole axially extending through the second locking portion, the second locking portion is connected to a limiting portion, and the limiting portion is provided with a second through-hole; in the locked state, the rear end of the first locking portion passes through the second through-hole, and the control cable passes through the central hole and the first through-hole, or the front end of the limiting portion passes through the first through-hole, and the control cable passes through the central hole and the second through-hole.

[0029] In an embodiment of the present invention, the first locking portion is stably locked to the second locking portion by inserting the first locking portion and the second locking portion into each other and then passing the control cable through the control cable. The control cable is installed in the slender tube and the rear end of the control cable is fixed to the slender tube. Therefore, the medical device implant can be withdrawn into the interior of the microcatheter by withdrawing the slender tube. After the accurate release position is determined, the fixed relationship between the rear end of the control cable and the slender tube is released, and the control cable 3 is withdrawn to release the medical device implant, so as to achieve the purpose of avoiding accidental occlusion.

[0030] In summary, the embodiments of the present invention at least alleviate the problem in existing mechanically detachable medical device implant delivery devices that, once the medical device implant is detached from the delivery tube, it cannot be withdrawn into the delivery tube, which may cause accidental plugging. At the same time, the locking stability of the first locking portion 4 and the second locking portion 5 in the mutually locked state can be enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 This is a schematic diagram of the overall structure of the first existing mechanically detachable medical device implant delivery device;

[0033] Figure 2 A schematic diagram of the overall structure of a second conventional mechanically detachable medical device implant delivery device;

[0034] Figure 3A schematic diagram of the connection structure between the first locking portion and the medical device implant in the first optional structure of the medical device implant delivery device provided by an embodiment of the present invention;

[0035] Figure 4 An exploded view of the connection structure between the first locking portion and the medical device implant in the first optional structure of the medical device implant delivery device provided by an embodiment of the present invention;

[0036] Figure 5 A diagram illustrating the assembly structure of the elongated tube and the control cable in a first optional structure of the medical device implant delivery device provided by an embodiment of the present invention;

[0037] Figure 6 A schematic diagram of the front end structure of the slender tube in the first optional structure of the medical device implant delivery device provided by an embodiment of the present invention;

[0038] Figure 7 A front end view of the elongated tube in a first optional structure of the medical device implant delivery device provided by an embodiment of the present invention;

[0039] Figure 8 A perspective view of a first locking portion and a second locking portion locked together within a microcatheter in a first optional structure of the medical device implant delivery device provided by an embodiment of the present invention;

[0040] Figure 9 A structural diagram showing a first locking portion and a second locking portion locked with each other and extending outside the microcatheter in a first optional structure of the medical device implant delivery device provided by an embodiment of the present invention;

[0041] Figure 10 A schematic diagram of the front end structure of the first optional structure of the medical device implant delivery device provided by an embodiment of the present invention after the medical device implant is released;

[0042] Figure 11 A schematic diagram of the connection structure between the first locking portion and the medical device implant in the second optional structure of the medical device implant delivery device provided by an embodiment of the present invention;

[0043] Figure 12 An exploded view of the connection structure between the first locking portion and the medical device implant in the second optional structure of the medical device implant delivery device provided by an embodiment of the present invention;

[0044] Figure 13 A schematic diagram of the assembly structure of the elongated tube and the control cable in the second optional structure of the medical device implant delivery device provided by an embodiment of the present invention;

[0045] Figure 14A schematic diagram of the front end structure of the slender tube in the second optional structure of the medical device implant delivery device provided by an embodiment of the present invention;

[0046] Figure 15 A schematic diagram of the front end structure of the second optional structure of the medical device implant delivery device provided by an embodiment of the present invention, in which the first locking portion and the second locking portion are locked with each other;

[0047] Figure 16 for Figure 15 Schematic diagram of the explosion structure;

[0048] Figure 17 A perspective view of the front end structure in which the first locking portion and the second locking portion are locked to each other inside the microcatheter in the second optional structure of the medical device implant delivery device provided by an embodiment of the present invention;

[0049] Figure 18 A structural diagram of the front end of the second optional structure of the medical device implant delivery device provided by an embodiment of the present invention, in which the first locking portion and the second locking portion are locked with each other and extend outside the microcatheter;

[0050] Figure 19 A schematic diagram of the front end structure of the second optional structure of the medical device implant delivery device provided in an embodiment of the present invention after the medical device implant is released.

[0051] Icons: 1-medical device implant; 2-microcatheter; 3-slender tube; 4-control cable; 5-first locking part; 51-main body; 500-first perforation; 511-rear extension part; 512-first extension part; 52-connecting part; 6-second locking part; 600-center hole; 610-limiting part; 611-second perforation; 7-tube cutting groove; 8-breaking part; 9-control cable fixing groove. DETAILED DESCRIPTION

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0053] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0054] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0055] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate and simplify the description of the present invention and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., etc., are used solely for distinction and should not be construed as indicating or implying relative importance.

[0056] Additionally, the term "front end" refers to the end away from the surgeon during surgery, and "back end" refers to the end closer to the surgeon during surgery.

[0057] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0058] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0059] Existing mechanically detachable medical device implant post-release devices mainly include a delivery tube, a control cable, and a locking assembly. Specifically, in a type of mechanically detachable medical device implant post-release device in the prior art, the delivery tube includes a microcatheter and a slender tube, the slender tube passes through the microcatheter, the control cable passes through the slender tube, and there is a large friction between the control cable and the slender tube, the locking assembly includes a first locking part connected to the rear end of the medical device implant and a second locking part connected to the front end of the slender tube, and the control cable locks the first locking part to the second locking part; before release, the first locking part and the second locking part are both located inside the microcatheter, and as the slender tube is pushed forward relative to the microcatheter, the first locking part and the second locking part can be slowly pushed out of the microcatheter, and then the control cable is withdrawn backward relative to the microcatheter, thereby separating the first locking part from the second locking part to release the medical device implant; more detailed structures are as follows. Figure 1As shown, the first locking part 5 and the second locking part 6 are both tubular structures with grooves on the tube wall, the grooves are connected to the tube cavity, and the top surface of the groove body is a corrugated surface extending along the axial direction of the tubular structure. Before release, the top surface of the corrugated groove body of the first locking part 5 and the top surface of the corrugated groove body of the second locking part 6 are buckled with each other, and the control cable 4 passes through the tube cavity of the slender tube 3, the tube cavity of the second locking part 6 and the tube cavity of the first locking part 5. When release is required, the control cable 4 is withdrawn to release the medical device implant 1, and then the slender tube 3 is withdrawn from the body; another type of mechanically detachable medical device in the prior art In the device post-implant release device, the control cable passes through a microcatheter or slender tube serving as a delivery tube. The locking assembly includes a first locking portion connected to the rear end of the medical device implant and a second locking portion connected to the front end of the control cable. Before release, the first locking portion and the second locking portion are both located inside the delivery tube and are engaged with each other. As the control cable is pushed forward relative to the delivery tube, the first locking portion and the second locking portion can be slowly pushed out of the delivery tube, thereby separating the first locking portion from the second locking portion to release the medical device implant. More detailed structures are available in the following sections. Figure 2 As shown, the control cable 4 passes through the microcatheter 2 or the slender tube 3 serving as a delivery tube, and the first locking portion 5 and the second locking portion 6 are hook-shaped structures that interlock with each other, or the first locking portion 5 and the second locking portion 6 (not shown) are mutually fitting protrusion and groove structures, and the protrusion can be, but is not limited to, a spherical protrusion.

[0060] The following is a further explanation of the first and second prior art structures in the order of examples of the above-mentioned prior art: In the prior art, in the first prior art structure, the mutually interlocking portion of the first locking portion 5 and the second locking portion 6 in the locking assembly is a simple mutual interlocking between grooves. The control cable 4 passes through the groove portion of the first locking portion 5 and the second locking portion 6, and the first locking portion 5 and the second locking portion 6 cannot be firmly restrained. Once the first locking portion 5 and the second locking portion 6 are pushed out of the microcatheter 2, the first locking portion 5 and the second locking portion 6 become loose, affecting the selection and control of the implantation angle. Moreover, due to the misalignment caused by the loosening between the first locking portion 5 and the second locking portion 6, it is impossible to retract the medical device implant 1 into the interior of the microcatheter 2. In the second prior art structure, it is even more impossible to retract the medical device implant 1 into the delivery tube after the first locking portion 5 is pushed forward.

[0061] In summary, existing mechanically detachable post-release devices for medical device implants have at least one problem: once the medical device implant is detached from the delivery tube, it cannot be withdrawn into the delivery tube, which may cause accidental occlusion. After an accidental occlusion, the incorrectly released medical device implant can only be removed from the human body by using another loop method or other means. The operation is complicated, not conducive to the rapid completion of the operation, and it is easy to increase surgical trauma.

[0062] In contrast, this embodiment provides a medical device implant delivery device, referring to Figures 3 to 19 The medical device implant delivery device includes a microcatheter 2, an elongated tube 3, a control cable 4, and a locking assembly. The elongated tube 3 passes through the microcatheter 2, the control cable 4 is installed in the elongated tube 3, and the rear end of the control cable 4 is fixed to the elongated tube 3. The locking assembly includes a first locking portion 5 and a second locking portion 6. The first locking portion 5 is used to connect to the rear end of the medical device implant 1, and the second locking portion 6 is connected to the front end of the elongated tube 3. The rear end of the first locking portion 5 is provided with a first through-hole 500. The interior of the second locking portion 6 is provided with a central hole 600 axially extending through the second locking portion 6. The second locking portion 6 is connected to a limiting portion 610, and the limiting portion 610 is provided with a second through-hole 611. In the locked state, the rear end of the first locking portion 5 passes through the second through-hole 611, and the control cable 4 passes through the central hole 600 and the first through-hole 500. Alternatively, the front end of the limiting portion 610 passes through the first through-hole 500, and the control cable 4 passes through the central hole 600 and the second through-hole 611.

[0063] In this embodiment, the first locking portion 5 is stably locked to the second locking portion 6 by inserting the first locking portion 5 and the second locking portion 6 into each other and then passing the control cable 4 through the control cable 4. In combination with the control cable 4 being installed in the slender tube 3 and the rear end of the control cable 4 being fixed to the slender tube 3, the medical device implant 1 can be withdrawn into the interior of the microcatheter 2 by withdrawing the slender tube 3. After the accurate release position is determined, the fixed relationship between the rear end of the control cable 4 and the slender tube 3 is released, and the control cable 4 is withdrawn to release the medical device implant 1, so as to achieve the purpose of avoiding accidental occlusion.

[0064] In summary, this embodiment at least alleviates the problem in existing mechanically detachable medical device implant delivery devices that, once the medical device implant 1 is detached from the delivery tube, it cannot be withdrawn into the delivery tube, which may cause accidental plugging. At the same time, it can enhance the locking stability of the first locking portion 5 and the second locking portion 6 when they are locked to each other.

[0065] In particular, in this embodiment, the control cable 4 can be a solid cable or a hollow cable, which is not specifically limited here.

[0066] Specifically, if Figures 3 to 10As shown, in some optional implementations of this embodiment, a rear extension portion 511 is provided at the rear end of the first locking portion 5, a first through-hole 500 is provided at the rear end of the rear extension portion 511, and the rear end of the rear extension portion 511 is curved in a direction away from the central axis of the first locking portion 5; a stopper 610 is obliquely disposed within the central hole 600 of the second locking portion 6, and the specific arrangement can be various connection forms such as snap connection, bonding, welding, or integral connection; in the locked state, the rear end of the rear extension portion 511 passes through the second through-hole 611 on the stopper 610, and the front end of the control cable 4 passes through the central hole 600 and the first through-hole 500. Preferably, the rear extension portion 511 is formed into a semi-annular structure. In these optional embodiments, the rear extension portion 511 is formed into a semi-annular structure, so that the portion where the rear end of the rear extension portion 511 extends out of the second through-hole 611 is very thin and small in size, and thus has a certain degree of flexibility, thereby improving the flexibility of the locking assembly, allowing the first locking portion 5 and the second locking portion 6 to rotate relative to each other by a certain angle, thereby improving the operational flexibility of the medical device implant delivery device, facilitating the doctor to adjust the angle, and thus facilitating the accurate release of the implant at the lesion.

[0067] Another example Figures 11 to 19 As shown, in some optional implementations of this embodiment, the rear end of the first locking portion 5 is provided with a first extension portion 512, and the first through-hole 500 is provided in the first extension portion 512; the rear end of the limiting portion 610 is connected to the front edge of the second locking portion 6, and the second through-hole 611 is provided at the front end of the limiting portion 610, and the front end of the limiting portion 610 is bent toward the central axis of the second locking portion 6; in the locked state, the front end of the limiting portion 610 passes through the first through-hole 500, and the front end of the control cable 4 passes through the central hole 600 and the second through-hole 611. Preferably, the first extension portion 512 has a semi-annular structure; the limiting portion 610 has an elongated strip structure. In these optional embodiments, the first extension portion 512 is formed into a semi-annular structure, thereby facilitating the front end of the limiting portion 610 to pass through the first perforation 500 smoothly and quickly. By forming the limiting portion 610 into an elongated structure, the volume of the portion where the front end of the limiting portion 610 extends out of the first perforation 500 is smaller, thereby improving the flexibility of the locking assembly and allowing the first locking portion 5 and the second locking portion 6 to rotate relative to each other by a certain angle, thereby improving the operational flexibility of the medical device implant delivery device, facilitating the doctor to adjust the angle, and thereby facilitating the accurate release of the implant at the lesion.

[0068] In addition, in order to facilitate processing and manufacturing and to reduce production costs as much as possible, in some optional implementations of this embodiment, preferably, the second locking portion 6 and the slender tube 3 are integrally formed.

[0069] Optionally, refer to Figure 3 、 Figure 4 、 Figure 11 and Figure 12The first locking portion 5 includes a main body 51 and a connecting portion 52 connected in one piece. The first through hole 500 is provided in the main body 51. The connecting portion 52 is used to be inserted and fixedly connected to the rear end of the medical device implant 1 by welding, bonding or other fixed connection methods. The first locking portion 5 can be, but is not limited to, Figure 3 、 Figure 4 、 Figure 11 and Figure 12 As shown, it is formed by winding a metal wire. Of course, in other optional implementations of this embodiment, the first locking portion 5 can also be integrally connected to the rear end of the two instrument implants.

[0070] In addition, the delivery tube of the release device after the medical device implant 1 in the prior art is relatively hard and has poor flexibility, which is not conducive to the delivery tube passing through the tortuous blood vessels and is inconvenient for doctors to use. Figure 5 、 Figure 6 and Figure 13 In an optional implementation of this embodiment, it is preferred that at least one tube groove 7 extending axially along the slender tube 3 is formed on the wall of the slender tube 3. The number of the tube groove 7 can be one or multiple, spaced apart, and is not specifically limited herein. The tube groove 7 can reduce the volume of a portion of the slender tube 3, making the slender tube 3 easier to bend and increasing the overall flexibility of the slender tube 3. Such a slender tube 3 can more easily pass through tortuous blood vessels, thereby facilitating the doctor's rapid delivery of the medical device implant 1 to the lesion site and reducing damage to the blood vessel wall. Preferably, the tube groove 7 is provided in a portion of the slender tube 3 near the second locking portion 6, which is equivalent to thinning the front end of the slender tube 3, thereby making the slender tube 3 easier to bend.

[0071] Of course, in other optional implementations of this embodiment, other methods may be used to increase the flexibility of the slender tube 3, such as but not limited to reducing the diameter of the slender tube 3 and using a more flexible material to manufacture the slender tube 3.

[0072] In addition, continue to refer to Figure 5 、 Figure 6 and Figure 13 In order to more conveniently withdraw the control cable 4 during the release process, in an optional implementation manner of this embodiment, a breaking portion 8 for breaking the slender tube 3 is provided at the rear end of the slender tube 3. When the medical device implant 1 needs to be released, the slender tube 3 is broken along the breaking portion 8, and then the control cable 4 is withdrawn. The breaking portion 8 includes but is not limited to one or more groove structures provided at the rear end of the slender tube 3, or a small section at the rear end of the slender tube 3 with a diameter smaller than other parts, or other breakable structures.

[0073] Continue to refer to Figure 5 、 Figure 6 and Figure 13Preferably, a control cable fixing groove 9 that is connected to the tube cavity of the slender tube 3 is opened on the tube wall at the rear end of the slender tube 3, and the rear end of the control cable 4 is fixedly connected to the inner wall of the groove body of the control cable fixing groove 9; the breaking portion 8 is arranged at the rear end of the slender tube 3 and is located at the front end of the control cable fixing groove 9. In this way, when retracting the control cable 4, it is only necessary to pull backward the rear end of the broken slender tube 3, which has the beneficial effect of convenient operation.

[0074] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other; the above embodiments in this specification are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that: it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A medical device implant delivery device, characterized in that: The invention comprises a microcatheter (2), a slender tube (3), a control cable (4) and a locking assembly; the slender tube (3) passes through the microcatheter (2), the control cable (4) is installed in the slender tube (3) and the rear end of the control cable (4) is fixed to the slender tube (3); the locking assembly comprises a first locking portion (5) and a second locking portion (6); the first locking portion (5) is used to be connected to the rear end of the medical device implant (1), and the second locking portion (6) is connected to the front end of the slender tube (3); A first through-hole (500) is provided at the rear end of the first locking portion (5); a central hole (600) axially penetrating the second locking portion (6) is provided inside the second locking portion (6); a limiting portion (610) is connected to the second locking portion (6), and a second through-hole (611) is provided on the limiting portion (610); In the locked state: the rear end of the first locking portion (5) passes through the second through-hole (611), and the control cable (4) passes through the central hole (600) and the first through-hole (500); or, the front end of the limiting portion (610) passes through the first through-hole (500), and the control cable (4) passes through the central hole (600) and the second through-hole (611); At least one tube cutting groove (7) extending along the axial direction of the slender tube (3) is provided on the tube wall of the slender tube (3), and the tube cutting groove (7) includes a portion of the slender tube (3) close to the second locking portion (6); A breaking portion (8) for breaking the slender tube (3) is provided at the rear end of the slender tube (3); a control cable fixing groove (9) communicating with the tube cavity of the slender tube (3) is provided on the tube wall at the rear end of the slender tube (3); the rear end of the control cable (4) is fixedly connected to the inner wall of the groove body of the control cable fixing groove (9); the breaking portion (8) is provided at the rear end of the slender tube (3) and is located at the front end of the control cable fixing groove (9).

2. The medical device implant delivery device according to claim 1, characterized in that: A rear extension portion (511) is provided at the rear end of the first locking portion (5), the first through-hole (500) is provided at the rear end of the rear extension portion (511), and the rear end of the rear extension portion (511) is bent in a direction away from the central axis of the first locking portion (5); The limiting portion (610) is obliquely arranged inside the central hole (600) of the second locking portion (6); In the locked state, the rear end of the rear extension portion (511) passes through the second through-hole (611) on the limiting portion (610), and the front end of the control cable (4) passes through the central hole (600) and the first through-hole (500).

3. The medical device implant delivery device according to claim 2, characterized in that: The rear extension portion (511) is formed into a semi-annular structure.

4. The medical device implant delivery device according to claim 1, characterized in that: A first extension portion (512) is provided at the rear end of the first locking portion (5), and the first through hole (500) is provided in the first extension portion (512); The rear end of the limiting portion (610) is connected to the front end edge of the second locking portion (6), the second through-hole (611) is provided at the front end of the limiting portion (610), and the front end of the limiting portion (610) is bent toward the central axis of the second locking portion (6); In the locked state, the front end of the limiting portion (610) passes through the first through-hole (500), and the front end of the control cable (4) passes through the central hole (600) and the second through-hole (611).

5. The medical device implant delivery device according to claim 4, characterized in that: The first extension portion (512) is a semi-annular structure; the limiting portion (610) is a long strip structure.

6. The medical device implant delivery device according to claim 1, characterized in that: The second locking portion (6) and the slender tube (3) are integrally formed.

7. The medical device implant delivery device according to claim 1, characterized in that: The first locking portion (5) comprises a main body (51) and a connecting portion (52) connected in one piece, the first through-hole (500) being provided in the main body (51), and the connecting portion (52) being used for being inserted into and fixedly connected to the rear end of the medical device implant (1).

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