Multi-channel connectors, handle assemblies, and conveyors for medical device delivery systems
By designing a multi-channel connector that integrates the sheath core and release element, the problem of cross-interference in the conveyor operation area is solved, enabling convenient multi-person operation and reducing manufacturing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MEDIHEALTH WELLTONE TECH (GUANGDONG) CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-07-03
Smart Images
Figure CN224441527U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical equipment technology, and more specifically, to a multi-channel connector, handle assembly, and conveyor for a medical device delivery system. Background Technology
[0002] Interventional therapy is a new technology that has been applied in clinical practice in recent years. It involves pre-loading an implantable medical device into a delivery system, then introducing it into the human body, and releasing the medical device to the lesion site under the monitoring of a fluoroscopic device to achieve the therapeutic purpose. For example, in the treatment of cardiovascular diseases, a stent is delivered to the lesion through a delivery system, and then the stent is released to expand and support the blood vessel wall.
[0003] The delivery system requires a guide wire to guide its movement. Therefore, the guide wire is inserted into the delivery system, typically entering the sheath from the rear end and exiting from the front. Since the system also involves the restraint and release of the implantable medical device, a release mechanism is installed within the delivery system. This release mechanism remains fixed during the delivery of the implantable medical device, and upon reaching the lesion location, it needs to be operated to release the implantable medical device.
[0004] In related technologies, multiple operations need to be performed on the handle of the delivery device, including but not limited to retracting the outer sheath, guiding the guidewire, retracting the sheath core, and retracting the release element. Different operating areas overlap and interfere with each other during operation, making it difficult to perform simultaneous operations. Furthermore, the operator needs to change the operating position multiple times during the operation, making the entire process quite inconvenient. Utility Model Content
[0005] The main purpose of this utility model is to provide a connector, handle assembly and delivery device for implantable medical device delivery devices, so as to solve the problem that different operating areas of the delivery device in the related technology have overlapping and interference, making it difficult to operate simultaneously, and requiring the operator to change the operating position multiple times during the operation, which is inconvenient for the whole operation process.
[0006] To achieve the above objectives, this utility model provides a multi-channel connector for a medical device delivery device, comprising:
[0007] The connector body has a first channel and a second channel that are interconnected. The first channel has open ends, and the second channel is located on the side of the first channel. The first channel is for the sheath core assembly of the conveyor to pass through, and the second channel is for the release component of the conveyor to pass through.
[0008] The first end of the connector body is provided with a first connecting part, which is used to connect to the proximal end of the handle body.
[0009] Furthermore, the second channel is configured as two or more, with different second channels used to pass through different release elements.
[0010] Furthermore, two or more of the second channels are distributed circumferentially along the connector body.
[0011] Furthermore, the axis of the first channel is coaxial with the axis of the sheath core assembly, and in the direction of movement of the release member, the axis of the second channel is at an obtuse angle to the axis of the first channel, so that the bending angle of the release member when it enters the first channel through the second channel is an obtuse angle.
[0012] Furthermore, the first connecting portion includes a connecting groove for assembling with a connecting plate near the proximal end of the handle body, thereby fixing the connector body to the proximal end of the handle body; or,
[0013] The first connecting part includes a connecting plate, which is used to assemble with a connecting groove at the proximal end of the handle body to fix the connector body at the proximal end of the handle body.
[0014] Furthermore, the first channel includes a far-segment channel, a mid-segment channel, and a near-segment channel; among which,
[0015] The diameter of the distal channel is larger than that of the middle channel. The distal channel is used to pass through a rigid sleeve fitted outside the sheath core assembly in the conveyor. The inner end face of the distal channel is used to abut against the end face of the rigid sleeve.
[0016] The middle channel and the proximal channel are used for the portion of the sheath core assembly extending out of the rigid sleeve to pass through. The entrance of the second channel is located in the middle channel and close to the distal channel, and the entrance of the third channel is located in the middle channel and close to the proximal channel.
[0017] Furthermore, a third channel is provided inside the connector body. The third channel is located on the side of the first channel and is connected to the first channel. The third channel is used to inject liquid into the distal end of the delivery device.
[0018] Furthermore, it also includes a guidewire connector, wherein the diameter of the proximal channel is larger than the diameter of the middle channel, the guidewire connector is connected to the proximal channel, and the guidewire connector is used to pass the guidewire into the sheath core of the sheath core assembly;
[0019] The guide wire connector is provided with a second connecting part, which is used to connect to the proximal end of the handle body.
[0020] Furthermore, it also includes a first seal, which is disposed within the proximal channel and abuts against the end face of the guidewire connector. The first seal is used to seal the sheath core of the sheath core assembly.
[0021] Furthermore, it also includes a release element connection connector, which is detachably fixed to the connector body via a quick-release structure and corresponds to the second channel. The release element connection connector is used to fix the release element extending from the distal end of the second channel.
[0022] According to another aspect of this application, a handle assembly for a medical device is provided, comprising the aforementioned connector and handle body; wherein,
[0023] The handle body has a third connecting part and a fourth connecting part at its proximal end. The third connecting part is connected to the first connecting part to fix the connector body.
[0024] When the connector also includes a guide wire connector, the fourth connecting part cooperates with the second connecting part on the guide wire connector to fix the guide wire connector.
[0025] According to another aspect of this application, a delivery device for a medical device is provided, comprising the aforementioned connector, and:
[0026] The outer sheath connector is located inside the handle body;
[0027] An outer sheath tube, the proximal end of which is movably inserted into the handle body and fixedly connected to the outer sheath tube connector;
[0028] The sheath core assembly is movably inserted inside the outer sheath tube, and the proximal end of the sheath core assembly extends out of the outer sheath tube and the outer sheath tube connector and passes through the first channel;
[0029] A rigid sleeve is fitted over the sheath core assembly, the distal end of the rigid sleeve passes through the outer sheath tube connector, the outer sheath tube connector is drivably movable within the handle body along the axial direction of the rigid sleeve, the proximal end of the rigid sleeve is fixed in the first channel, there is a movable space between the rigid sleeve and the sheath core assembly, and the second channel and the third channel communicate with the movable space;
[0030] The second seal is fixed to the proximal end of the outer sheath connector and slidably sleeved on the rigid sleeve to seal the liquid flow channel between the sheath core assembly and the outer sheath connector during the movement of the outer sheath connector.
[0031] In this embodiment of the utility model, a connector body is provided, and a first channel and a second channel are provided inside the connector body. The two ends of the first channel are open structures, and the second channel is located on the side of the first channel. The first channel is used for the sheath core assembly of the delivery device to pass through, and the second channel is used for the release component of the delivery device to pass through. The first end of the connector body is provided with a first connecting part, which is used to connect with the proximal end of the handle body. On the one hand, by integrating the first channel and the second channel into a connector and installing the connector on the proximal end of the handle body, the operating area for controlling the retraction of the outer sheath tube, the operating area for controlling the release component to release the medical device, and the operating area for operating the guide wire guidance on the handle body are arranged separately, avoiding mutual interference between multiple operations. It also facilitates the coordination between multiple people when operating at the same time and the space utilization in the operating room.
[0032] On the other hand, when the first and second channels are close to each other, the operating positions of the release element and the guidewire are also close to each other. During the operation, the operator does not need to change the operating position, which can further reduce the difficulty of operation. Moreover, after integrating the two channels into a single connector body, only one mounting position needs to be configured on the handle for installing the connector body. This reduces the number of mounting positions on the handle, thereby reducing the manufacturing cost of the handle and facilitating installation and disassembly. Ultimately, this solves the problem in related technologies where different operating areas of the delivery device overlap and interfere with each other, making simultaneous operation difficult and requiring the operator to change the operating position multiple times during the operation, which is inconvenient for the entire process. Attached Figure Description
[0033] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model, making other features, objects, and advantages of the utility model more apparent. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:
[0034] Figure 1 This is a schematic cross-sectional view of the assembly structure of the connector and handle according to an embodiment of the present utility model;
[0035] Figure 2 This is an exploded view of the assembly structure of the connector and handle according to an embodiment of this utility model;
[0036] Figure 3 This is a partial structural schematic diagram of the conveyor assembly according to an embodiment of the present utility model;
[0037] Figure 4 This is a schematic diagram of the structure of the connector body having two second channels according to an embodiment of the present utility model;
[0038] Figure 5 yes Figure 4 A schematic diagram of the structure of the connector body assembled to the handle body;
[0039] The components include: 1. Handle body; 100. First housing; 101. Second housing; 102. Third connecting part; 103. Fourth connecting part; 2. Retractable drive mechanism; 3. Sheath core assembly; 30. Middle tube; 31. Sheath core; 4. Connector body; 41. First channel; 410. Distal channel; 411. Middle channel; 412. Proximal channel; 42. Second channel; 43. Third channel; 44. First connecting part; 5. Release component connecting connector; 6. Release component; 7. Guide wire connector; 70. Second connecting part; 8. First seal; 9. Second seal; 10. Sealing groove; 11. Sealing pressure block; 13. Slider; 14. Outer sheath tube connector; 200. Outer sheath tube; 23. Rigid sleeve. Detailed Implementation
[0040] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0041] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein.
[0042] In this invention, the terms "upper," "lower," "inner," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0043] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.
[0044] Furthermore, the terms "set up," "equipped with," "connected," and "fixed" should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0045] In addition, the term "multiple" should mean two or more.
[0046] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0047] To solve related technical problems, such as Figures 1 to 3 As shown, this utility model embodiment provides a multi-channel connector for a medical device delivery device, suitable for installation at the proximal end of the handle body 1 of an implantable medical device delivery device. The connector includes:
[0048] The connector body 4 has a first channel 41, a second channel 42 and a third channel 43 that are interconnected. The two ends of the first channel 41 are open structures, and the second channel 42 is located on the side of the first channel 41.
[0049] The first channel 41 is for the sheath core assembly 3 of the conveyor to pass through, and the second channel 42 is for the release element 6 of the conveyor to pass through;
[0050] The distal end of the connector body 4 is provided with a first connecting part 44, which is used to connect to the proximal end of the handle body 1 of the conveyor.
[0051] A medical device delivery system is used to deliver implantable medical devices to the lesion site within the human body and to release the implantable medical device. Taking a stent as an example of an implantable medical device, the delivery system mainly includes a handle body 1, an outer sheath 200 connected to the handle body 1, and a sheath core assembly 3. The sheath core assembly 3 may include a sheath core 31 and a middle layer tube 30 sleeved and fixed outside the sheath core 31. The stent can be loaded into the loading space at the distal end of the outer sheath 200 and the sheath core 31. At this time, the stent is in a compressed state and is constrained by the distal end of the release element 6. During the intervention, a guidewire inserted in the sheath core 31 guides the outer sheath 200 and the sheath core assembly 3 to move as a whole. The movement can be performed by operating the handle body 1. After reaching the lesion site, the outer sheath 200 is retracted by operating the handle body 1 to expose the stent constrained on the sheath core 31. Then, the release element 6 is operated to release the stent, which can be precisely placed at the target location.
[0052] In this embodiment, the connector is installed on the handle body 1 of the conveyor to create a channel for the release element 6 and a channel for the sheath core assembly 3, facilitating the operation of the release element 6 and the insertion of the guide wire into the sheath core 31 of the sheath core assembly 3. Specifically, the connector is installed at the proximal end of the handle body 1 of the conveyor, and the connector body 4 of the connector is provided with a first channel 41 and a second channel 42 that are interconnected. The first channel 41 can mate with the proximal end of the sheath core assembly 3, allowing the sheath core assembly 3 to pass through. After the sheath core assembly 3 passes through the first channel 41, there is space between the sheath core assembly 3 and the first channel 41.
[0053] The second channel 42 is used for the passage of the release member 6 of the conveyor. Specifically, the distal end of the release member 6 needs to extend to the distal end of the sheath core 31 in the sheath core assembly 3 to constrain the bracket sleeved on the sheath core 31. The proximal end of the release member 6 disengages from the sheath core assembly 3 and enters the second channel 42. During the release of the bracket, the proximal end of the release member 6 needs to be manipulated to move it and release the distal bracket. During assembly, the distal end of the release member 6 passes through the second channel 42 into the space between the sheath core assembly 3 and the first channel 41 and extends toward the distal end of the conveyor to the location of the bracket.
[0054] In this embodiment, the first channel 41 can be arranged axially on the connector body 4, so that it is not easy to deform when the sheath core assembly 3 passes through. The second channel 42 and the third channel 43 are respectively located on both sides of the first channel 41. In some embodiments, the connector body 4 includes two arms, and the second channel 42 and the third channel 43 are respectively located in one arm.
[0055] like Figure 1 and Figure 3 As shown, to facilitate the connection between the connector body 4 and the proximal end of the handle body 1, a first connecting portion 44 is provided at the first end (i.e., the distal end of the connector) of the connector body 4 in this embodiment. The first connecting portion 44 can cooperate with the proximal end of the handle body 1 to fix the connector body 4. In one embodiment, the first connecting portion 44 can be inserted into the proximal end of the handle body 1 and fixed by a snap-fit, etc. In another embodiment, the first connecting portion 44 can be snapped and fixed to the proximal end of the handle body 1. In this embodiment, the specific connection structure between the first connecting portion 44 and the proximal end of the handle body 1 is not limited and can be designed according to actual needs.
[0056] In this embodiment, by integrating the first channel 41 and the second channel 42 into a connector and installing the connector on the proximal end of the handle body 1, the operating area on the handle body 1 for controlling the retraction of the outer sheath 200 is separated from the operating area for controlling the release of the medical device by the release member 6 and the operating area for operating the guide wire. This avoids interference between the retraction operation of the outer sheath and other operations, and also facilitates the coordination between multiple people operating simultaneously in front and behind positions, as well as the space utilization in the operating room.
[0057] On the other hand, when the first channel 41 and the second channel 42 approach each other, the operating positions of the release element 6 and the guide wire also approach each other. During the operation, the operator does not need to change the operating position, which can further reduce the difficulty of operation. Moreover, after integrating the three channels into a connector body 4, only one installation position needs to be configured on the handle body 1 for installing the connector body 4. This can reduce the number of installation positions on the handle body 1, thereby reducing the manufacturing cost of the handle body 1 and making it easier to install and disassemble. This can solve the problems of inconvenient operation of the conveyor and the high manufacturing cost and complicated installation of the handle body 1 of the conveyor in the related technology.
[0058] In one embodiment, a third channel 43 is further provided within the connector body 4. The third channel 43 is located on the side of the first channel 41 and communicates with the first channel 41. The third channel 43 is used to inject liquid into the distal end of the conveyor. After assembly, the third channel 43 communicates with the space between the sheath core assembly 3 and the wall of the first channel 41. This space communicates to the distal end of the conveyor, so that the liquid injected into the third channel 43 can pass through this space and flow to the distal end of the conveyor.
[0059] In some embodiments, the second channel 42 is positioned close to the distal end of the first channel 41 to minimize the contact area of the release member 6 within the first channel 41 and reduce friction. The third channel 43 is positioned close to the proximal end of the first channel 41 to facilitate the removal of internal air by means of liquid injection.
[0060] Depending on the requirements, two or more release members 6 can be provided to better constrain the stent to the distal end of the sheath core 31. In one embodiment, two release members 6 are provided, which can be located on a first side and a second side of the sheath core 31, respectively. One release member 6 is longer and can connect to the distal end of the stent, while the other release member 6 is shorter and can connect to the proximal end of the stent, thereby stably constraining the stent to the sheath core 31. Accordingly, as Figure 4 and Figure 5As shown, in this embodiment, two second channels 42 need to be configured inside the connector body 4. The two second channels 42 are distributed circumferentially around the connector body 4, and each of the two second channels 42 leads to a release element 6, so that different release elements 6 can be operated in a certain order during the release process. Of course, there can be more release elements 6, and correspondingly, more second channels 42 need to be configured inside the connector body 4. In this embodiment, the specific number is not limited.
[0061] In one implementation, such as Figure 1 and Figure 3 As shown, the axis of the first channel 41 is coaxial with the axis of the proximal portion of the sheath core assembly 3. In the direction of movement of the release member 6, the axis of the second channel 42 forms an obtuse angle with the axis of the first channel 41. Specifically, taking a horizontally placed conveyor as an example, the axis of the first channel 41 is horizontal, which facilitates connection to the sheath core assembly 3 and also facilitates the entry of the guide wire into the sheath core assembly 3 and the movement of the guide wire. The second channel 42 is located to the side of the first channel 41 and is inclined. In the direction of movement of the release member 6, the second channel 42 forms an obtuse angle (i.e., the angle between the first channel 41 and the second channel 42 at the distal end is obtuse), thus making the bending angle of the release member 6 at the junction of the second channel 42 and the first channel 41 smaller, reducing the resistance encountered by the release member 6 during movement, and facilitating the pulling of the release member 6 during release. In some embodiments, this angle can be 120° to 160°.
[0062] In one embodiment of the first connecting part 44, the first connecting part 44 includes a connecting groove for assembling with a connecting plate near the end of the handle body 1 to fix the connector body 4 to the near end of the handle body 1.
[0063] Specifically, the handle body 1 of the conveyor may include two parts, namely a first housing 100 and a second housing 101 that can be fastened to each other. A connecting plate is provided on the inner proximal end of the first housing 100 and the second housing 101. The connecting plate is inserted into the connecting groove of the connector body 4 by the fastening of the first housing 100 and the second housing 101, thereby fixing the connector body 4 to the proximal end of the handle body 1.
[0064] Of course, in another embodiment, the first connecting part 44 includes a connecting plate for fitting with a connecting groove at the proximal end of the handle body 1 to fix the connector body 4 to the proximal end of the handle body 1.
[0065] In one embodiment, the delivery device suitable for the connector includes an outer sheath connector 14 disposed within the handle body 1. The outer sheath connector 14 is capable of connecting to the outer sheath 200 and can be retracted by a drive. The sheath core assembly 3 includes a sheath core 31 and a middle tube 30. The proximal end of the middle tube 30 is located within the outer sheath connector 14, and the proximal end of the sheath core 31 extends out of the middle tube 30, the outer sheath connector 14, and into a first channel 41 of the connector body 4. To create a liquid flow channel and to support and guide the movement of the outer sheath connector 14, a rigid sleeve 23, such as a stainless steel sleeve, is fitted onto the sheath core 31 in this embodiment. The distal end of the rigid sleeve 23 extends into the outer sheath connector 14, and the proximal end extends into the first channel 41.
[0066] With this configuration, the outer sheath connector 14 can retract along the rigid sleeve 23, thus improving the stability and accuracy of its retraction. Simultaneously, a channel can be formed between the rigid sleeve 23 and the sheath core 31. The distal end of this channel communicates with the internal space of the outer sheath connector 14 and the space between the outer sheath 200 and the middle tube 30. The proximal end of this channel communicates with the space between the sheath core 31 and the first channel 41, i.e., with the second channel 42 and the third channel 43. Therefore, the release member 6, inserted through the second channel 42, can extend distally through the channel within the rigid sleeve 23, and the liquid injected through the third channel 43 can also flow distally through the channel within the rigid sleeve 23.
[0067] To facilitate the assembly of the rigid sleeve 23, such as Figure 3 As shown, in this embodiment, the first channel 41 includes a distal channel 410, a middle channel 411, and a proximal channel 412; wherein, the diameter of the distal channel 410 is larger than the diameter of the middle channel 411, the distal channel 410 is used to pass through the rigid sleeve 23 sleeved outside the sheath core assembly 3 in the conveyor, and the inner end face of the distal channel 410 is used to abut against the end face of the rigid sleeve 23;
[0068] The middle channel 411 and the proximal portion are used for the portion of the sheath core assembly 3 extending out of the rigid sleeve 23 to pass through. The entrance of the second channel 42 is located in the middle channel 411 and close to the distal channel 410. The entrance of the third channel 43 is located in the middle channel 411 and close to the proximal channel 412.
[0069] Specifically, the diameter of the distal channel 410 matches the diameter of the rigid sleeve 23, and the diameter of the intermediate channel 411 matches the diameter of the sheath core 31. During installation, the end face of the rigid sleeve 23 abuts against the end face of the distal channel 410, while the sheath core 31 enters the intermediate channel 411 and can extend into the proximal channel. The distal channel 410 allows for positioning of the relative positions of the connector body 4 and the rigid sleeve 23, facilitating the insertion of the release element 6 into the rigid sleeve 23 via the second channel 42.
[0070] To facilitate guidewire insertion, an additional guidewire connector 7 is required, such as... Figure 1 and Figure 3 As shown, the guidewire connector 7 can be installed at the proximal end of the connector body 4 and corresponds to the first channel 41. To facilitate the connection between the guidewire connector 7 and the connector body 4, in this embodiment, the diameter of the proximal channel 412 is larger than the diameter of the middle channel 411, and the proximal channel 412 is used to connect the guidewire connector 7. The diameter of the proximal channel 412 matches the diameter of the distal end of the guidewire connector 7, and the distal end of the guidewire connector 7 can be inserted into the proximal channel 412. The sheath core 31 can be inserted into the guidewire connector 7 and fixed to facilitate the guidewire entering the sheath core 31.
[0071] In one implementation, such as Figure 3 As shown, the guide wire connector 7 is detachably connected to the connector body 4 and corresponds to the first channel 41. The guide wire connector 7 is used to guide the wire into the sheath core 31.
[0072] Specifically, in this embodiment, the guidewire connector 7 can be connected to the proximal end of the first channel 41, specifically to the proximal channel 412 of the first channel 41. The sheath core 31 in the sheath core assembly 3 is mated to the guidewire connector 7, and the guidewire can enter the sheath core 31 through the guidewire connector 7.
[0073] In one embodiment, the guide wire connector 7 is a Luer connector, and the connector body 4 is a double Luer connector.
[0074] After configuring a third channel 43 on the connector body 4 for liquid injection, it is necessary to prevent liquid from flowing out from the proximal end of the connector body 4. Therefore, as follows... Figure 3 As shown, the connector in this embodiment also includes a first sealing element 8. The first sealing element 8 is disposed in the proximal channel 412 and abuts against the end face of the guide wire connector 7. The first sealing element 8 is used to seal the sheath core 31 of the sheath core assembly 3.
[0075] Specifically, the first sealing element 8 can be a sealing ring, which is fitted onto the sheath core 31. After the guide wire connector 7 is installed to the proximal end of the connector body 4, it presses the first sealing element 8 against the end face of the proximal channel 412, thereby sealing the proximal end of the first channel 41 through the first sealing element 8 and preventing the liquid injected through the third channel 43 from flowing out.
[0076] like Figure 3As shown, to facilitate the fixing of the guide wire connector 7, a second connecting part 70 is provided on the guide wire connector 7 in this embodiment. The second connecting part 70 is used for fixed connection with the proximal end of the handle body 1. In one embodiment, the second connecting part 70 can also be a connecting groove. Correspondingly, a connecting plate corresponding to the connecting groove is provided on the handle body 1 of the conveyor. When the two shells of the handle body 1 are fastened together, the connecting plate is inserted into the connecting groove to fix the guide wire connector 7. In another embodiment, the second connecting part 70 can be inserted into the proximal end of the handle body 1 for fixation. For example, the second connecting part 70 can be set as a buckle, and a slot is provided at the proximal end of the handle body 1. The buckle can be inserted into the slot and fixed.
[0077] When releasing the bracket, the release component 6 needs to be pulled back. This process needs to be performed on the connector body 4. To facilitate pulling the release component 6, as follows: Figure 1 and Figure 3 As shown, the connector assembly in this embodiment also includes a release member connecting connector 5, which is detachably fixed to the connector body 4 and corresponds to the second channel 42. The release member connecting connector 5 is used to fix the release member 6 extending from the distal end of the second channel 42.
[0078] Specifically, after the bracket is loaded, the proximal end of the release element 6 can be fixed to the release element connecting joint 5 after passing through the second channel 42. The release element connecting joint 5 can then be fixed to the joint body 4, thereby fixing the release element 6. When it is necessary to release the bracket, the release element connecting joint 5 can be removed from the joint body 4. At this time, the release element connecting joint 5 can be held and pulled outward to pull the release element 6 to release the bracket.
[0079] In one embodiment, the release element connecting joint 5 and the joint body 4 are detachably connected via a quick-release structure. Specifically, the release element connecting joint 5 and the joint body 4 can be connected by threads or snap-fit, thereby facilitating installation and disassembly, and consequently, the loading and release of the bracket. The release element 6 and the release element connecting joint 5 can be bolted or welded together, etc., but this embodiment does not impose any limitations.
[0080] According to another aspect of this application, such as Figure 1 As shown, a handle assembly for implantable medical devices is provided, including the aforementioned connector and handle body 1; wherein,
[0081] The handle body 1 has a third connecting part 102 and a fourth connecting part 103 at its proximal end. The third connecting part 102 is connected to the first connecting part 44 to fix the connector body 4, and the fourth connecting part 103 is connected to the second connecting part 70 to fix the guide wire connector 7.
[0082] In this embodiment, as described above, as... Figure 2As shown, the first connecting part 44 and the second connecting part 70 can be configured as connecting grooves, and the third connecting part 102 and the fourth connecting part 103 can be configured as connecting plates. The second connecting part 70 can also be configured as a snap-fit, and the fourth connecting part 103 can also be configured as a slot.
[0083] In one embodiment, the handle body 1 further includes a first housing 100 and a second housing 101, which are fastened together. A third connecting part 102 is disposed inside the first housing 100 and the second housing 101. The distal end of the connector body 4 is located between the first housing 100 and the second housing 101 and is fixed by mutual cooperation between the third connecting part 102 and the first connecting part 44. The third connecting part 102 may be a connecting plate located inside the first housing 100 and the second housing 101, and the first connecting part 44 may be a connecting groove disposed at the distal end of the connector body 4. After the first housing 100 and the second housing 101 are fastened together, the connecting plate is inserted into the connecting groove to fix the connector body 4.
[0084] In one implementation, such as Figure 3 As shown, the second connecting part 70 includes a first buckle fixed to the guide wire connector 7, and the fourth connecting part 103 includes a second buckle. The first buckle can be inserted between the first housing 100 and the second housing 101 and is fixedly connected to the second buckle.
[0085] Specifically, the first snap-fit can be located at one end of the guide wire connector 7 near the connector body 4, and the second connecting part 70 can be two and symmetrically distributed. The first housing 100 and the second housing 101 are fastened together at their proximal ends to form an insertion port. The first snap-fit can be inserted between the first housing 100 and the second housing 101 through the insertion port and is snapped together with the second snap-fit. The guide wire connector 7 has a sealing part, which closes the end face of the insertion port after the first snap-fit and the second snap-fit are connected.
[0086] In one implementation, such as Figure 1 As shown, the handle assembly also includes:
[0087] The retraction drive mechanism 2 is located inside the handle body 1. The retraction drive mechanism 2 includes a drive end and an operating end. The operating end can control the drive end to move inside the handle body 1.
[0088] Slider 13 is disposed inside handle body 1. Slider 13 is connected to drive end and is driven by drive end to move slider 13 backward relative to handle body 1.
[0089] The outer sheath tube connector 14 is located inside the handle body 1 and can move along the axial direction of the handle body 1. The outer sheath tube connector 14 is used to fix the outer sheath tube 200 that passes through the handle body 1. The outer sheath tube connector 14 is connected to the slider 13. During the backward movement of the slider 13, the outer sheath tube connector 14 is pushed to move backward.
[0090] The retraction drive mechanism 2, the slider 13, and the outer sheath connector 14 are all located at the far end of the handle body 1.
[0091] Specifically, in this embodiment, the retraction drive assembly is responsible for being operated to drive the slider 13 to move backward within the handle body 1. The retraction drive assembly can adopt various structural forms, such as including a gear and a rack. The rack can slide back and forth within the handle body 1, and the slider 13 is mounted on the rack. The gear meshes with the rack, and rotating the gear drives the rack to slide back and forth, thereby driving the slider 13 to move linearly. Therefore, this embodiment does not limit the specific structure of the retraction drive assembly and can be designed according to actual needs.
[0092] According to another aspect of this application, such as Figure 1 and Figure 3 As shown, a delivery device for a medical device is provided, including the aforementioned handle assembly, and:
[0093] The outer sheath connector 14 is located inside the handle body 1;
[0094] The outer sheath 200 has its proximal end movably inserted into the handle body 1 and fixedly connected to the outer sheath connector 14.
[0095] The sheath core assembly 3 is movably inserted inside the outer sheath tube 200, and the proximal end of the sheath core assembly 3 extends out of the outer sheath tube 200 and the outer sheath tube connector 14 and passes through the first channel 41;
[0096] A rigid sleeve 23 is sleeved on the outside of the sheath core assembly 3. The distal end of the rigid sleeve 23 passes through the outer sheath tube connector 14. The outer sheath tube connector 14 can be driven to move along the axial direction of the rigid sleeve 23 within the handle body 1. The proximal end of the rigid sleeve 23 is fixed in the first channel 41. There is a movable space between the rigid sleeve 23 and the sheath core assembly 3. The second channel 42 and the third channel 43 are connected to the movable space.
[0097] The second sealing element 9 is fixed to the proximal end of the outer sheath tube connector 14 and slidably sleeved on the rigid sleeve 23 to seal the liquid flow channel between the sheath core assembly 3 and the outer sheath tube connector 14 during the movement of the outer sheath tube connector 14, thereby preventing blood from flowing out of the body.
[0098] In this embodiment, the outer sheath connector 14 is disposed within the handle body 1. The outer sheath connector 14 can connect to the outer sheath 200 and can be retracted and moved by a drive. The sheath core assembly 3 includes a sheath core 31 and a middle tube 30. The proximal end of the middle tube 30 is located within the outer sheath connector 14, and the proximal end of the sheath core 31 extends out of the middle tube 30 and the outer sheath connector 14 and enters the first channel 41 of the connector body 4. To construct a liquid flow channel and to support and guide the movement of the outer sheath connector 14, a rigid sleeve 23, such as a stainless steel sleeve, is fitted onto the sheath core 31 in this embodiment. The distal end of the rigid sleeve 23 extends into the outer sheath connector 14, and the proximal end extends into the first channel 41.
[0099] With this configuration, the outer sheath connector 14 can retract along the rigid sleeve 23, thus improving the stability and accuracy of its retraction. Simultaneously, a channel can be formed between the rigid sleeve 23 and the sheath core 31. The distal end of this channel communicates with the internal space of the outer sheath connector 14 and the space between the outer sheath 200 and the middle tube 30. The proximal end of this channel communicates with the space between the sheath core 31 and the first channel 41, i.e., with the second channel 42 and the third channel 43. Therefore, the release member 6, inserted through the second channel 42, can enter the outer sheath connector 14 through the channel within the rigid sleeve 23. Liquid injected from the third channel 43 can also flow into the outer sheath connector 14 through the channel within the rigid sleeve 23 and flow distally through the space between the outer sheath 200 and the middle tube 30.
[0100] Since liquid needs to be injected distally through the third channel 43, the liquid needs to flow through the internal space of the outer sheath connector 14. Therefore, it is necessary to prevent the liquid from leaking from the proximal end of the outer sheath connector 14. It is also necessary to prevent blood entering the outer sheath 200 during delivery from leaking from the proximal end of the outer sheath connector 14. In this embodiment, a second sealing element 9 is provided. The second sealing element 9 is fixed to the proximal end of the outer sheath connector 14 and slidably sleeved on the rigid sleeve 23. The gap between the proximal end of the outer sheath connector 14 and the rigid sleeve 23 is sealed by the second sealing element 9, thereby preventing the liquid inside the outer sheath connector 14 from flowing out. Simultaneously, since the outer sheath connector 14 needs to move along the rigid sleeve 23, the second sealing element 9 needs to be slidably sleeved on the rigid sleeve 23. Therefore, the second sealing element 9 achieves a dynamic sealing function in this embodiment.
[0101] In addition, based on the sealing concept, the rigid sleeve 23 in this embodiment can withstand greater compressive force without deformation, which can improve the sealing performance without affecting the movement of the outer sheath connector 14.
[0102] In one embodiment, for ease of sealing, such as Figure 3As shown, a sealing groove 10 is provided at the proximal end of the outer sheath connector 14, and a second sealing element 9 is disposed within the sealing groove 10. A sealing block 11 is also provided, which is slidably sleeved on the sheath core assembly 3 and fixed within the sealing groove 10 to press the second sealing element 9. The sealing block 11 and the sealing groove 10 can be interference-fitted to press and fix the second sealing element 9.
[0103] In one embodiment, a release member 6 is also included. The release member 6 is attached to the outside of the sheath core assembly 3 and is movable relative to the sheath core assembly 3. The distal end of the release member 6 extends between the sheath core assembly 3 and the outer sheath tube 200 and is used to restrain the medical device on the sheath core assembly 3. The proximal end of the release member 6 passes through the movable space into the second channel 42 and extends out through the proximal end of the second channel 42. The distal medical device is released by operating the proximal end of the release member 6.
[0104] Specifically, in this embodiment, the release element 6 can be a slender rod-shaped or filamentous structure. The sheath core assembly 3 can include a sheath core 31 and a middle layer tube 30 sleeved and fixed outside the sheath core 31. The distal end of the release element 6 is connected to a medical device sleeved on the sheath core 31, such as a stent, thereby constraining the medical device to the distal end of the sheath core 31. The proximal end of the release element 6 extends into the second channel 42. The proximal end of the release element 6 needs to be fixed, so the proximal end of the release element 6 can further extend out of the second channel 42 and be fixedly connected to the release element 6 connecting connector 5. During release, the release element 6 connecting connector 5 is operated to separate from the connector body 4, thereby pulling the release element 6 to move, separating the distal end of the release element 6 from the medical device, and realizing the precise release of the medical device.
[0105] According to another aspect of this application, a delivery device for an implantable medical device is provided, comprising the aforementioned connector, or the aforementioned handle assembly, or the aforementioned delivery assembly.
[0106] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A multi-channel hub for a medical instrument conveyor, characterized by, include: The connector body has a first channel and a second channel that are interconnected. The first channel has open ends, and the second channel is located on the side of the first channel. The first channel is for the sheath core assembly of the conveyor to pass through, and the second channel is for the release component of the conveyor to pass through. The first end of the connector body is provided with a first connecting part, which is used to connect to the proximal end of the handle body.
2. The multi-channel junction of claim 1, wherein, The second channel is configured to have two or more channels, and different second channels are used to pass through different release elements.
3. The joint of claim 2, wherein, Two or more of the second channels are distributed circumferentially along the connector body.
4. The multi-channel junction of claim 1, wherein, The axis of the first channel is coaxial with the axis of the sheath core assembly. In the direction of movement of the release member, the axis of the second channel is at an obtuse angle to the axis of the first channel, so that the bending angle of the release member when it enters the first channel through the second channel is an obtuse angle.
5. The multi-channel junction of claim 1, wherein, The first connecting portion includes a connecting groove for assembling with a connecting plate near the proximal end of the handle body, thereby fixing the connector body to the proximal end of the handle body; or, The first connecting part includes a connecting plate, which is used to assemble with a connecting groove at the proximal end of the handle body to fix the connector body at the proximal end of the handle body.
6. The multi-channel junction of claim 1, wherein, The first channel includes a far-segment channel, a mid-segment channel, and a near-segment channel; wherein, The diameter of the distal channel is larger than that of the middle channel. The distal channel is used to pass through a rigid sleeve fitted outside the sheath core assembly in the conveyor. The inner end face of the distal channel is used to abut against the end face of the rigid sleeve. The middle channel and the proximal channel are used for the portion of the sheath core assembly extending out of the rigid sleeve to pass through. The entrance of the second channel is located in the middle channel and close to the distal channel, and the entrance of the third channel is located in the middle channel and close to the proximal channel.
7. The multi-channel junction of claim 6, wherein, The connector body is also provided with a third channel, which is located on the side of the first channel and communicates with the first channel. The third channel is used to inject liquid into the distal end of the delivery device.
8. The multi-channel junction of claim 6, wherein, It also includes a guidewire connector, wherein the diameter of the proximal channel is larger than the diameter of the middle channel, the guidewire connector is connected to the proximal channel, and the guidewire connector is used to pass the guidewire into the sheath core of the sheath core assembly; The guide wire connector is provided with a second connecting part, which is used to connect to the proximal end of the handle body.
9. The multi-channel junction of claim 8, wherein, It also includes a first seal, which is disposed within the proximal channel and abuts against the end face of the guidewire connector. The first seal is used to seal the sheath core of the sheath core assembly.
10. The multi-channel junction of claim 1, wherein, It also includes a release element connection connector, which is detachably fixed to the connector body via a quick-release structure and corresponds to the second channel. The release element connection connector is used to fix a release element extending from the distal end of the second channel.
11. A handle assembly for a medical instrument, the handle assembly comprising: Includes the multi-channel connector and handle body as described in any one of claims 1 to 10; wherein, The handle body has a third connecting part and a fourth connecting part at its proximal end. The third connecting part is connected to the first connecting part to fix the connector body. When the connector also includes a guide wire connector, the fourth connecting part cooperates with the second connecting part on the guide wire connector to fix the guide wire connector.
12. A delivery device for a medical device, comprising: Including the multi-channel connector as described in any one of claims 1 to 10, and: The outer sheath connector is located inside the handle body; An outer sheath tube, the proximal end of which is movably inserted into the handle body and fixedly connected to the outer sheath tube connector; The sheath core assembly is movably inserted inside the outer sheath tube, and the proximal end of the sheath core assembly extends out of the outer sheath tube and the outer sheath tube connector and passes through the first channel; A rigid sleeve is fitted over the sheath core assembly, the distal end of the rigid sleeve passes through the outer sheath tube connector, the outer sheath tube connector is drivably movable within the handle body along the axial direction of the rigid sleeve, the proximal end of the rigid sleeve is fixed in the first channel, there is a movable space between the rigid sleeve and the sheath core assembly, and the second channel and the third channel communicate with the movable space; The second seal is fixed to the proximal end of the outer sheath connector and slidably sleeved on the rigid sleeve to seal the liquid flow channel between the sheath core assembly and the outer sheath connector during the movement of the outer sheath connector.