Connectors for medical device delivery systems, delivery systems for implantable medical devices

Abstract

This application provides a connector for a medical device delivery device and a delivery device for implantable medical devices, belonging to the field of medical device technology. Specifically, the connector is suitable for installation on the handle body of the medical device delivery device. The connector includes a connecting connector and a fixing connector. The connecting connector has a first channel for the passage of a release element. The fixing connector is detachably connected to the connecting connector via a quick-release structure. The fixing connector has a fixing structure for fixing the proximal end of the release element. After the distal end of the release element extends into the distal end of the delivery device through the first channel, the proximal end of the release element connects with the fixing structure in the fixing connector, forming a fixed connection with the fixing connector. The fixing connector is quickly detachably connected to the connecting connector. When it is necessary to retract the release element, the operator can simply detach the fixing connector from the connecting connector and pull it backward. The structure is simple and the operation is convenient.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to a connector for a medical device delivery device and a delivery device for implantable medical devices. Background Technology

[0002] Implantable 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 device, 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 peripheral vascular disease, a stent is delivered through a delivery device and placed into the lesion, and then the stent is expanded or self-expanded to support the blood vessel wall to restore the patency of the blood vessel.

[0003] For this type of implantable medical device, it needs to be pre-loaded onto the delivery system. Taking a stent as an example, during loading, the stent is loaded between the outer sheath and the core under radial compression of the outer sheath. After loading, due to the expansion of the stent, there is significant friction between the stent and the outer sheath. When releasing, the outer sheath needs to be retracted first. At this time, the stent is prone to move with the sheath, causing stent shortening and inaccurate positioning.

[0004] To prevent the support from shortening during the retraction of the outer sheath, related technologies attach a release element to the sheath core. This release element positions and restrains the support in a predetermined state, preventing movement during retraction. Once the outer sheath is fully retracted, the support needs to be released by operating the release element from the handle. Since the proximal end of the release element typically extends from the handle, it is necessary to secure this end to the handle while allowing it to retract. Therefore, a connector structure that can easily secure the proximal end of the release element is urgently needed. Utility Model Content

[0005] The purpose of this application is to provide a connector for a medical device delivery device and a delivery device for an implantable medical device, which can fix and retract the proximal end of the release element at the handle end.

[0006] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of this application.

[0007] According to a first aspect of this application, a connector for a medical device delivery device is provided, the connector being adapted for mounting on the handle body of the medical device delivery device, the connector comprising a connecting connector and a fixing connector; wherein...

[0008] The connecting joint has a first channel for the release component to pass through. The fixing joint is detachably connected to the connecting joint via a quick-release structure. The fixing joint has a fixing structure for fixing the proximal end of the release component.

[0009] In one exemplary embodiment of this application, the quick-release structure includes a plug and a slot, wherein one of the connecting connector and the fixing connector is provided with a plug, and the other is provided with a slot that matches the plug.

[0010] In one exemplary embodiment of this application, the quick-release structure includes an external thread on the connecting joint and an internal thread on the fixed joint, wherein the fixed joint is detachably connected to the connecting joint through the engagement of the internal thread and the external thread.

[0011] In one exemplary embodiment of this application, the fixing joint is provided with a second channel, which communicates with the first channel, and the proximal end of the release member passes through the second channel and is connected to the fixing structure.

[0012] In one exemplary embodiment of this application, the fixing structure includes:

[0013] A wedge is provided at the port of the second channel, and an opening groove is provided to cooperate with the wedge. The wedge is inserted into the opening groove to squeeze the release member and fix the proximal end of the release member.

[0014] In one exemplary embodiment of this application, the wedge includes an insertion portion adapted to be inserted into the opening groove and a blocking portion abutting against the end of the opening groove.

[0015] In one exemplary embodiment of this application, the insertion part is frustum-shaped, and the end with the larger diameter is connected to the blocking part.

[0016] In one exemplary embodiment of this application, the side of the blocking portion is provided with a clearance groove that allows the release member to pass through, and the proximal end of the release member extends out after passing through the clearance groove.

[0017] In one exemplary embodiment of this application, the fixing structure includes a fixing block connected to the port of the second channel, and the proximal end of the release member extends out of the second channel and is knotted on the fixing block for fixation.

[0018] In one exemplary embodiment of this application, the fixing block is provided with a through hole that allows the release member to pass through, and the proximal end of the release member passes through the through hole to complete the knotting.

[0019] In one exemplary embodiment of this application, the proximal end of the release member is fused to the fixing structure.

[0020] According to a second aspect of this application, a delivery device for implantable medical devices is provided, including the aforementioned connector for a medical device delivery device.

[0021] The exemplary embodiments of this application may have some or all of the following beneficial effects:

[0022] During the delivery of medical devices, the distal end of the release element can restrict the medical device, making its position on the sheath relatively fixed and preventing it from moving with the outer sheath. The fixing element can fix the position of the release element, so that the release element and the medical device will not move during the retraction of the outer sheath. After the outer sheath has been retracted, the release element is then retracted to release the medical device.

[0023] The connector for a medical device delivery device provided in the example embodiment of this application is used to install on the handle body of the medical device delivery device. The connector includes a connecting connector and a fixing connector. The connecting connector is used to connect to the handle body and has a first channel. A release element can pass through the first channel to the distal end of the delivery device. The fixing connector is detachably connected to the connecting connector via a quick-release structure and has a fixing structure inside. The fixing structure is used to fix the proximal end of the release element. After the distal end of the release element extends into the distal end of the delivery device through the first channel, the proximal end of the release element connects with the fixing structure inside the fixing connector, forming a fixed connection with the fixing connector. The fixing connector is quick-release connected to the connecting connector. When it is necessary to retract the release element, the operator can simply detach the fixing connector from the connecting connector and pull it backward. The structure is simple and the operation is convenient.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0026] Figure 1 A schematic diagram of the structure of a connector for a medical device delivery device according to Embodiment 1 of this application is shown;

[0027] Figure 2This paper shows an exploded schematic diagram of a first embodiment of a connector for a medical device delivery device according to Embodiment 1 of this application;

[0028] Figure 3 This paper shows a schematic diagram of the structure of a wedge block inserted into an opening groove in a first embodiment of a connector for a medical device delivery device according to Embodiment 1 of this application;

[0029] Figure 4 This paper shows a schematic diagram of the structure of a connector for a medical device delivery device in a first embodiment of Embodiment 1 of the present application, in which an end cap is disposed on a fixed connector;

[0030] Figure 5 This paper shows a split schematic diagram of a second embodiment of a connector for a medical device delivery device according to Embodiment 1 of this application;

[0031] Figure 6 This illustration shows a structural schematic diagram of a release element knotted in a fixing block in a second embodiment of a connector for a medical device delivery device according to Embodiment 1 of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 400, Release element; 700, Connecting joint; 7001, First channel; 800, Fixing structure; 8001, Wedge; 80011, Insertion part; 80012, Blocking part; 80013, Clearance groove; 8002, Fixing block; 8003, Through hole; 900, Liquid connector; 1000, Guide wire channel; 1100, Fixing joint; 11001, Second channel; 11002, Opening groove; 1200, End cap. Detailed Implementation

[0034] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed descriptions will be omitted. Furthermore, the drawings are merely illustrative of this application and are not necessarily drawn to scale.

[0035] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples in the accompanying drawings. It is understood that if the device of the icon is flipped so that it is upside down, the component described as "upper" will become the component described as "lower." When a structure is "upper" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0036] The terms “a,” “one,” “the,” and “at least one” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first” and “second” are used only as markers and are not a limitation on the number of objects.

[0037] Example 1

[0038] During the delivery of the medical device, the distal end of the release member 400 can restrict the medical device, so that the position of the medical device on the sheath core is relatively fixed, preventing the medical device from moving backward with the outer sheath. The fixing member can fix the position of the release member 400, so that the release member 400 and the medical device will not move during the backward retraction of the outer sheath. After the outer sheath is retracted, the release member 400 is then retracted to release the medical device.

[0039] This embodiment provides a specific implementation of a connector for a medical device delivery system, such as... Figure 1 As shown, the connector is suitable for installation on the handle body. The connector includes a connecting connector 700 and a fixing connector 1100. The connecting connector 700 is connected to the handle body, and the fixing connector 1100 is detachably connected to the connecting connector 700 via a quick-release structure. A first channel 7001 is provided inside the connecting connector 700. The release member 400 extends into the distal end of the delivery device through the first channel 7001. The proximal end of the release member 400 is fixed to the fixing connector 1100 via a fixing structure 800. When the release member 400 needs to be retracted, the operator can remove the fixing connector 1100 from the connecting connector 700 and pull the fixing connector 1100 backward. The structure is simple and the operation is convenient.

[0040] Specifically, a connector is connected to the handle body. The connector is used to guide the release element 400 into the handle body and extend to the distal end of the delivery device to restrict the medical device. A connecting connector 700 is connected to the handle body, and a fixing connector 1100 is connected to the connecting connector 700 via a quick-release connector. The proximal end of the release element 400 is fixed in the fixing connector 1100 via a fixing structure 800. At the handle body, the release element 400 enters the handle body through the first channel 7001 in the connecting connector 700. The fixing connector 1100 is quickly disassembled through the quick-release connection between the fixing connector 1100 and the connecting connector 700, and the fixing connector 1100 is controlled to pull backward to retract the release element 400, thereby releasing the release element 400 from restricting the medical device.

[0041] In this embodiment, the quick-release structure includes an external thread on the connecting joint 700 and an internal thread on the fixed joint 1100. The internal thread is used to engage with the external thread to achieve a quick-release connection between the fixed joint 1100 and the connecting joint 700.

[0042] In other embodiments, the quick-release structure can also be a plug and slot combination, with one of the connecting connector 700 and the fixing connector 1100 having a plug and the other having a slot, so that quick disassembly and installation can be achieved through the combination of the plug and slot, and the structure is simple and easy to operate; the quick-release structure can also be a snap-fit ​​structure such as a slot and a snap-fit ​​block.

[0043] In this embodiment, the fixed connector 1100 is provided with a second channel 11001, which communicates with the first channel 7001. The fixed connector 1100 inside the fixed connector 1100 is located at the port position of the second channel 11001. The release member 400 enters the first channel 7001 from the second channel 11001 and extends to the far end of the conveyor through the first channel 7001. The fixing structure 800 fixes the proximal end of the release member 400.

[0044] In this embodiment, as Figure 2 , Figure 3 and Figure 4 As shown, the fixing structure 800 includes a wedge 8001. An opening groove 11002 matching the wedge 8001 is provided at the port position of the second channel 11001. After the proximal end of the release member 400 extends out of the second channel 11001, the wedge 8001 is inserted into the opening groove 11002. The wedge 8001 presses the release member 400 to complete the fixing of the proximal end of the release member 400.

[0045] Furthermore, the wedge 8001 includes an insertion part 80011 for insertion into the opening groove 11002 and a blocking part 80012 that abuts against the end of the opening groove 11002. After the insertion part 80011 is inserted into the opening groove 11002, it squeezes the release member 400, which can fix the proximal end of the release member 400. The blocking part 80012 abuts against the end of the opening groove 11002, which can prevent the insertion part 80011 from being completely inserted into the opening groove 11002 and unable to be removed, thus avoiding the problem of subsequent replacement.

[0046] Specifically, the insertion part 80011 is frustum-shaped, with the larger diameter end connected to the blocking part 80012, and the smaller diameter end easily entering the opening groove 11002 first. As the insertion part 80011 is inserted, the larger diameter insertion part 80011 will undergo plastic deformation, thereby gradually squeezing and pressing the release member 400. Furthermore, the wedge 8001 can be fixed to the opening groove 11002 by means of adhesive bonding, heat fusion welding and ultrasonic welding, so as to avoid the failure of the force generated by the plastic deformation of the wedge 8001 alone, which would cause the wedge 8001 to spring back and fail to press the release member 400.

[0047] In this embodiment, a clearance groove 80013 is provided on the side of the blocking part 80012 of the wedge block 8001 to allow the release member 400 to pass through. The proximal end of the release member 400 passes through the second channel 11001 and is fixed by the wedge block 8001. The protruding part is led to the interior of the fixed joint 1100 through the clearance groove 80013.

[0048] In some other embodiments, such as Figure 5 and Figure 6 As shown, the fixing structure 800 can also be a fixing block 8002. The fixing block 8002 is connected to the port of the second channel 11001. After the proximal end of the release member 400 extends out from the second channel 11001, it is tied on the fixing block 8002 for fixation. The fixing block 8002 is fixedly installed in the fixing structure 800. An installation groove can be opened at the port of the second channel 11001. The fixing block 8002 is installed in the installation groove. After the proximal end of the release member 400 extends out, it is tied on the fixing block 8002 to fix the proximal end of the release member 400.

[0049] Furthermore, the fixing block 8002 is provided with a through hole 8003 allowing the release member 400 to pass through. After the proximal end of the release member 400 extends from the second channel 11001, it passes through the through hole 8003 to complete the knot, thus preventing the release member 400 from easily falling off if it is directly wrapped around the surface of the fixing block 8002. Specifically, there are at least two through holes 8003, and the axes of the at least two through holes 8003 are opposite. The proximal end of the release member 400 is fixed by passing back and forth through different through holes 8003. In this embodiment, it is preferable to provide two through holes 8003, and the axes of the two through holes 8003 are perpendicular to each other. One of them can communicate with the second channel 11001, so that the proximal end of the release member 400 can directly pass through the second channel 11001 through one through hole 8003, and then pass through the other through holes 8003 to complete the knot fixation.

[0050] In some other embodiments, the proximal end of the release member 400 can also be connected to the fixing structure 800 by welding. In this case, the fixing structure 800 can also be a fixing block 8002, and the proximal end of the release member 400 is fixedly connected to the fixing block 8002 by welding.

[0051] In this embodiment, an end cap 1200 is also included, which is provided on the end of the fixed joint 1100. The end cap 1200 is provided on the end of the fixed joint 1100 and can cover the internal fixed structure 800 and the proximal end of the release member 400.

[0052] In this embodiment, as Figure 1 As shown, the connectors on the main body of the mounting handle are three-way connectors, namely a connecting connector 700, a liquid connector 900, and a guide wire channel 1000. The guide wire channel 1000 is used to connect the guide wire connector and allow the guide wire to pass through. The liquid connector 900 is used for the passage of liquids such as contrast agents. The other is the connecting connector 700, which is used for the release element 400 to pass through and for connecting the fixing connector 1100.

[0053] Working principle:

[0054] Taking a stent delivery device as an example, the stent needs to be pre-loaded to the distal end of the delivery device. The distal end of the release member 400 is used to constrain the stent, and the proximal end of the release member 400 extends from the handle body through a connector. The connector includes a connecting connector 700 and a fixing connector 1100. The connecting connector 700 is connected to the handle body, and the fixing connector 1100 is detachably connected to the connecting connector 700. The fixing connector 1100 has a fixing structure 800 inside, which can fix the proximal end of the release member 400. When the fixing connector 1100 is installed on the connecting connector 700, the distal end of the release member 400 is constrained by the stent. When the stent needs to be released, the operator operates the fixing connector 1100 to remove it and pulls the fixing connector 1100 backward to move the release member 400 backward, so that the release member 400 releases the constraint on the stent, allowing the stent to fully expand to the preset position.

[0055] Example 2

[0056] This embodiment provides a specific implementation of a delivery device for implantable medical devices, which is implemented using the connector for medical device delivery devices in Embodiment 1.

[0057] Other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the embodiments thereof. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not claimed in this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the appended claims.

Claims

1. A connector for a medical device delivery system, characterized in that, The connector is adapted to be installed on the handle body of a medical device delivery device, and the connector includes a connecting connector and a fixing connector; wherein... The connecting joint has a first channel for the release component to pass through. The fixing joint is detachably connected to the connecting joint via a quick-release structure. The fixing joint has a fixing structure for fixing the proximal end of the release component.

2. The connector for a medical device delivery device according to claim 1, characterized in that, The quick-release structure includes an external thread on the connecting joint and an internal thread on the fixed joint. The fixed joint is detachably connected to the connecting joint through the engagement of the internal thread and the external thread.

3. The connector for a medical device delivery device according to claim 1, characterized in that, The quick-release structure includes a plug and a slot, wherein one of the connecting connector and the fixing connector is provided with a plug, and the other is provided with a slot that matches the plug.

4. The connector for a medical device delivery device according to claim 1, characterized in that, The fixed joint has a second channel that communicates with the first channel. The proximal end of the release member passes through the second channel and connects to the fixed structure.

5. The connector for a medical device delivery device according to claim 4, characterized in that, The fixing structure includes: A wedge is provided at the port of the second channel, and an opening groove is provided to cooperate with the wedge. The wedge is inserted into the opening groove to squeeze the release member and fix the proximal end of the release member.

6. The connector for a medical device delivery device according to claim 5, characterized in that, The wedge includes an insertion portion adapted to be inserted into the opening groove and a blocking portion abutting against the end of the opening groove.

7. The connector for a medical device delivery device according to claim 6, characterized in that, The insertion part is frustum-shaped, and the end with the larger diameter is connected to the blocking part.

8. The connector for a medical device delivery device according to claim 7, characterized in that, The side of the blocking part is provided with a clearance groove that allows the release member to pass through, and the proximal end of the release member extends out after passing through the clearance groove.

9. The connector for a medical device delivery device according to claim 4, characterized in that, The fixing structure includes a fixing block connected to the port of the second channel, and the proximal end of the release member extends out of the second channel and is knotted on the fixing block for fixation.

10. The connector for a medical device delivery device according to claim 9, characterized in that, The fixing block has a through hole that allows the release member to pass through, and the proximal end of the release member passes through the through hole to complete the knot.

11. The connector for a medical device delivery device according to claim 1, characterized in that, The proximal end of the release member is welded to the fixing structure.

12. A delivery device for implantable medical devices, characterized in that, The connector for a medical device delivery system includes any one of claims 1-11.

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