Pusher device for occluder and occluder system

Abstract

The application relates to a pushing device of a closure device and a closure device system. The pushing device of the closure device comprises a connecting head, a connecting rod, a first connecting piece and a pushing rod, the distal end of the pushing rod is provided with a threaded hole, the distal end of the connecting rod is connected with the connecting head, the connecting head is used for mounting the closure device, the proximal end of the connecting rod is provided with a first thread to be screwed with the threaded hole of the pushing rod, the first connecting piece is slidably sleeved outside the connecting rod, and the first connecting piece can be clamped with the distal end of the pushing rod to limit the rotation between the connecting rod and the pushing rod. In the above scheme, the connecting head and the pushing rod are detachably connected, so that the user can replace the connecting head at any time according to the situation. In addition, the relative rotation of the pushing rod and the connecting rod can be effectively limited or hindered through the first connecting piece, the separation of the pushing rod and the connecting rod when the closure device and the connecting head are disconnected is avoided, and the safety of the pushing device is ensured.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, mainly to the delivery device and occluder system of occluders. Background Technology

[0002] Cardiovascular interventional occlusion therapy is mainly used for congenital heart disease. It involves percutaneous puncture of peripheral blood vessels, and under the guidance of X-ray fluoroscopy and echocardiography, the sheath is advanced to the corresponding location of the heart lesion. Then, an occluder is advanced through the catheter via a delivery device to the appropriate location of the heart lesion for occlusion treatment. Due to the increasing demand for occluders, many types of occluders are available on the market, making it impossible for a single delivery device to be compatible with all occluders, thus leading to the development of multiple delivery devices. Utility Model Content

[0003] In response to the above-mentioned deficiencies or disadvantages, this disclosure provides a pusher device and a plugging device system for a plugging device that allows for replacement of the connector as needed and whose connector is not easily separated during use.

[0004] In a first aspect, this disclosure provides a pushing device for an occluder, including a connector, a connecting rod, a first connecting member, and a pushing rod. The distal end of the pushing rod is provided with a threaded hole, and the distal end of the connecting rod is connected to the connector. The connector is used to install the occluder. The proximal end of the connecting rod is provided with a first thread to be threadedly connected to the threaded hole of the pushing rod. The first connecting member is slidably sleeved on the outside of the connecting rod, and the first connecting member can engage with the distal end of the pushing rod to restrict the rotation between the connecting rod and the pushing rod.

[0005] Optionally, the first connector has a through hole, through which the connecting rod can pass and engage with the connecting rod, so that when the first connector rotates, it drives the connecting rod to rotate.

[0006] Optionally, a first engaging groove is formed at the proximal end of the through hole, and the push rod can be inserted into the first engaging groove. Through the engagement groove and the push rod, the push rod rotates, causing the first connecting member to rotate.

[0007] Optionally, the distal end of the push rod is provided with a second connector that is fixedly connected to the push rod. The second connector has a boss, the cross-section of which is non-circular, and the shape of the cross-section of the first engaging groove matches the shape of the cross-section of the boss.

[0008] Optionally, it also includes an elastic element, the distal end of which is connected to the connector head, and the proximal end of which is connected to the first connector.

[0009] Secondly, this disclosure provides a pushing device for an occluder, including a connector, a connecting rod, a first connecting member, and a pushing rod. The distal end of the pushing rod is provided with a threaded hole, and the proximal end of the first connecting member is provided with a second thread. The distal end of the connecting rod is connected to the connector. The connector is used to install the occluder. The first connecting member is fixed to the connecting rod. When the first connecting member is in the abutting position, the first connecting member is threadedly connected to the pushing rod through the second thread and the threaded hole, and the first connecting member abuts against the pushing rod to form a resistance that prevents the connecting rod and the pushing rod from rotating relative to each other.

[0010] Optionally, the first connector has a first abutting slope, and the push rod has a second abutting slope. When the first connector is in the abutting position and the first connector rotates along the second thread to disengage from the push rod, the first abutting slope of the first connector abuts against the second abutting slope of the push rod to form a resistance that prevents the first connector and the push rod from rotating relative to each other.

[0011] Optionally, the first connector has an abutting portion, the first abutting slope is formed in the abutting portion, and the distal end of the push rod is provided with a third connector that is fixedly connected to the push rod. The third connector has a first receiving groove, and the second abutting slope is formed in the first receiving groove.

[0012] Optionally, the abutting portion has a first abutting limiting surface, and the first receiving groove has a second abutting limiting surface. When the first connector is in the abutting position, the first abutting limiting surface abuts against the second abutting limiting surface to restrict the first connector from continuing to be screwed into the push rod through the second thread.

[0013] Thirdly, this disclosure provides a occluder system, including an occluder and a pushing device for the occluder in any of the above embodiments, wherein the connector is threadedly connected to the occluder, and the force with which the connector disengages from the occluder is less than the force with which the first connector located at the abutment position disengages from the pushing rod.

[0014] The pusher device for the occluder disclosed herein has a detachable connection between its connector and the pusher rod, allowing the user to replace the connector at any time as needed. Furthermore, the first connector effectively restricts or prevents relative rotation between the pusher rod and the connecting rod, preventing separation of the pusher rod and connecting rod when the occluder is disconnected from the connector, thus ensuring the safety of the pusher device. Attached Figure Description

[0015] Figure 1This disclosure includes a push rod, various connectors, a first elastic element, a connecting rod, and a first connector in one embodiment.

[0016] Figure 2 for Figure 1 A schematic diagram of the structure of one type of connector, connecting rod and first connecting member after assembly.

[0017] Figure 3 for Figure 2 A schematic diagram of the connecting rod in the diagram.

[0018] Figure 4a for Figure 1 A schematic diagram of the structure of the first connector.

[0019] Figure 4b for Figure 4a Schematic diagram of section AA.

[0020] Figure 5 for Figure 1 A schematic diagram of the push rod in the middle.

[0021] Figure 6a for Figure 5 A schematic diagram of the push rod from another angle.

[0022] Figure 6b for Figure 6a A schematic diagram of the BB section.

[0023] Figure 7 This is a schematic diagram of the assembly of a certain pusher device structure in one embodiment.

[0024] Figure 8 This is a partial structural diagram of another embodiment.

[0025] Figure 9 This is a schematic diagram of the structure of the first connector in another embodiment.

[0026] Figure 10 This is a schematic diagram of the push rod in another embodiment.

[0027] Figure 11 for Figure 10 A schematic diagram of the third connector in the diagram.

[0028] Figure 12 This is a schematic diagram of the assembly of the pushing device portion in another embodiment.

[0029] Figure 13 This is a schematic diagram of the assembly of the pushing device and the blocking device in one embodiment of this disclosure.

[0030] Figure 14This is a schematic diagram of the assembly of the pushing device and the blocking device in another embodiment of this disclosure.

[0031] The diagram shows the following markings: 100, connector; 200, connecting rod; 210, first thread; 300, first connector; 310, first engaging groove; 320, abutment part; 321, first abutment slope; 322, first abutment limiting surface; 330, second thread; 340, intermediate section; 350, welding section; 400, push rod; 410, second connector; 411, boss; 420, third connector; 421, second abutment slope; 422, second abutment limiting surface; 423, first receiving groove; 414, threaded hole; 500, elastic element; 600, plug; A, first direction; B, second direction. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0033] For doctors, matching and selecting between various delivery devices and occluders is extremely complex and can lead to significant costs. Furthermore, incompatibility between the occluder and delivery device often prevents the surgery from proceeding smoothly. Therefore, the applicant conceived of a novel delivery device for the occluder.

[0034] like Figure 1 and Figure 2 As shown, the present disclosure provides a pushing device for an occluder, comprising a connector 100, a connecting rod 200, and a pushing rod 400 connected sequentially from the distal end to the proximal end. The distal end of the connecting rod 200 is welded to the connector 100. The proximal end of the connecting rod 200 has a first thread 210, as detailed in the following description. Figure 3 The connecting rod 200 is threaded through the first thread 210 to engage with the threaded hole 414 of the push rod 400, thereby threading the connecting rod 200 and the push rod 400 together. The connector 100 is used to install the plug 600. It should be noted that the fixing connection method between the connecting rod 200 and the connector 100 is not limited to welding; other types of fixing connections (such as adhesive bonding) are also acceptable.

[0035] It should be noted that the push rod 400 has a relatively long length, extending from outside the body to the corresponding location of the heart lesion. The user controls the movement, rotation, or swinging of the connector 100 by manipulating the push rod 400, thereby installing the occluder. Specifically, the user can push the push rod 400 distally to move the connector 100 and the occluder distally. Once the occluder reaches the predetermined position (i.e., the corresponding location of the heart lesion) and unfolds, the push rod 400 can be rotated. If the connector 100 and the occluder 600 are connected by threads, rotating the push rod 400 will cause the connector 100 to rotate, thereby disengaging the connector 100 from the occluder 600 (which is fixed by body tissue after unfolding). Furthermore, in some alternative embodiments, the connector 100 and the occluder 600 are not connected by threads, but by other means. At this point, the method of disconnecting the connector 100 from the plug 600 is not limited to rotating the push rod 400; the connector 100 and the plug 600 can also be separated by shaking or vibrating the push rod 400.

[0036] However, since the connecting rod 200 and the pushing rod 400 are also connected by threads, rotating the occluder 600 may cause the connecting rod 200 to disengage from the pushing rod 400. Therefore, the pushing device of the occluder 600 in this disclosure also includes a first connecting member 300, see details below. Figure 1 and Figure 2 The first connector 300 is slidably sleeved on the outside of the connecting rod 200 and can engage with the distal end of the push rod 400 to restrict rotation between the connecting rod 200 and the push rod 400. Therefore, when the connecting rod 200 and the push rod 400 need to be threaded together, the first connector 300 can be moved so that it is not engaged with the push rod 400. After the connecting rod 200 and the push rod 400 are installed, the first connector 300 can be moved so that it engages with the distal end of the push rod 400 to restrict rotation between the connecting rod 200 and the push rod 400.

[0037] Specifically, the first connector 300 has a through hole through which the connecting rod 200 can pass. The connecting rod 200 engages with the first connector 300 through the through hole, causing the connecting rod 200 to rotate when the first connector 300 rotates. Specifically, the through hole includes a first engaging groove 310, an intermediate section 340, and a welding section 350 arranged sequentially from near to far. Figure 4a and Figure 4bAs shown. The first engaging groove 310, the intermediate section 340, and the welding section 350 are interconnected, allowing the connecting rod 200 to pass sequentially through the welding section 350, the intermediate section 340, and the first engaging groove 310. The welding section 350 is used to install and fix the elastic element 500. The cross-section of the intermediate section 340 is non-circular, and the cross-section of the connecting rod 200 matches the shape of the cross-section of the intermediate section 340, thus causing the connecting rod 200 to rotate when the first connecting member 300 rotates.

[0038] Furthermore, a first engaging groove 310 is formed at the proximal end of the through hole, into which the push rod 400 can be inserted. The engagement of the first engaging groove 310 with the push rod 400 causes the first connecting member 300 to rotate when the push rod 400 rotates. A second connecting member 410 is fixedly connected to the distal end of the push rod 400. The second connecting member 410 has a boss 411 with a non-circular cross-section. The shape of the cross-section of the first engaging groove 310 matches the shape of the cross-section of the boss 411. See [link to details]. Figure 5 , Figure 6a and Figure 6b Specifically, the outer contour of the cross-section of the boss 411 is a regular hexagon, and the cross-section of the first engaging groove 310 is a corresponding regular hexagon. Therefore, the boss 411 can be inserted into the first engaging groove 310, and when the push rod 400 is rotated, the boss 411 formed at the distal end of the push rod 400 will also rotate, thereby driving the first connecting member 300 to rotate.

[0039] It should be further noted that the pushing device of the occluder 600 may also include an elastic element 500, with the distal end of the elastic element 500 welded to the connector 100 and the proximal end of the elastic element 500 welded to the first connector 300. Optionally, the elastic element 500 may be sleeved outside the connecting rod 200, with the proximal end of the elastic element 500 welded within the welded section 350 of the first connector 300. Specifically, when it is necessary to rotate the connecting rod 200 and the pushing rod 400 relative to each other to achieve a threaded connection, the first connector 300 needs to be pushed to the distal end. At this time, the elastic element 500 is compressed by the first connector 300 and the connector 100. After the connecting rod 200 and the push rod 400 are installed and fixed, the user can release the first connecting piece 300 to allow the elastic element 500 to reset, thereby pushing the first connecting piece 300 towards the push rod 400. This allows the boss 411 of the push rod 400 to insert into the first engaging groove 310 of the first connecting piece 300, preventing the push rod 400 and the first connecting piece 300 from rotating relative to each other. Simultaneously, since the first connecting piece 300 and the connecting rod 200 also cannot rotate relative to each other, the push rod 400 and the connecting rod 200 can no longer rotate relative to each other. See [link to documentation] for details. Figure 7 Optionally, the first elastic element 500 is a spring.

[0040] It should be noted that the way the distal end of the elastic element 500 is fixedly connected to the connector 100 is not limited to welding; other fixing methods (such as adhesive bonding) are also acceptable. Similarly, the way the proximal end of the elastic element 500 is fixedly connected to the first connector 300 is not limited to welding; other fixing methods (such as adhesive bonding) are also acceptable.

[0041] Furthermore, this disclosure also provides a pushing device for an occluder according to another embodiment. The pushing device for the occluder includes a connector 100, a connecting rod 200, a first connector 300, and a pushing rod 400, as detailed below. Figure 8-10 The distal end of the push rod 400 has a threaded hole, and the proximal end of the first connector 300 has a second thread 330, allowing for a threaded connection between the first connector 300 and the push rod 400. The distal end of the connecting rod 200 is fixedly connected to the connector 100, which is used to install the plugger 600. Since the first connector 300 is fixed to the connecting rod 200, rotation of the connecting rod 200 can cause the first connector 300 to rotate and threadedly connect with the push rod 400. Once the first connector 300 moves to the abutment position, the abutment between the first connector 300 and the push rod 400 creates resistance that prevents the connecting rod 200 and the push rod 400 from rotating relative to each other. See details [link to details]. Figure 9-12 .

[0042] Specifically, the first connector 300 has an abutment portion 320, which has a first abutment slope 321. The distal end of the push rod 400 is provided with a third connector 420 fixedly connected to the push rod 400. The third connector 420 has a first receiving groove 423, which has a second abutment slope 421. When the first connector 300 rotates along the second thread 330 to disengage from the push rod 400, the resistance formed by the abutment of the first abutment slope 321 and the second abutment slope 421 can hinder the mutual rotation between the first connector 300 and the push rod 400. Since the connecting rod 200 is fixedly connected to the first connector 300, this resistance can also hinder the mutual rotation between the connecting rod 200 and the push rod 400. It should be noted that the extension directions of the first abutting slope 321 and the second abutting slope 421 are approximately the same as the direction of the second thread 330, so that when the connecting rod 200 and the first connecting member 300 rotate along the second thread 330 to disengage from the push rod 400, the first abutting slope 321 can abut against the second abutting slope 421 to generate greater resistance.

[0043] In addition, the third connector 420 has a threaded hole inside for threaded connection with the second thread 330.

[0044] For ease of explanation, we... Figure 12The first direction A is marked on the label. Specifically, the connecting rod 200 can only extend into the push rod 400 along the second thread 330 when it rotates relative to the push rod 400 along the first direction A. That is, when the connecting rod 200 rotates relative to the push rod 400 along the first direction A, the connecting rod 200 will be threadedly connected to the push rod 400; when the connecting rod 200 rotates relative to the push rod 400 in the opposite direction of the first direction A, the connecting rod 200 will gradually separate from the push rod 400.

[0045] Optionally, the abutting portion 320 is formed with a first abutting limiting surface 322. The first abutting slope 321 and the first abutting limiting surface 322 of the abutting portion 320 are arranged along a first direction A, that is, the first abutting limiting surface 322 is located on the first direction A of the first abutting slope 321.

[0046] Optionally, the first receiving groove 423 is formed with a second abutting limiting surface 422. The second abutting slope 421 and the second abutting limiting surface 422 of the push rod 400 are arranged along a first direction A, that is, the second abutting limiting surface 422 is located on the first direction A of the second abutting slope 421.

[0047] The advantage of the above design is that when the abutting part 320 rotates relative to the push rod 400 along the first direction A, the first abutting slope 321 of the abutting part 320 will move along the second abutting slope 421 to gradually insert into the first receiving groove 423. At this time, the first abutting limiting surface 322 of the abutting part 320 will finally abut against the second abutting limiting surface 422 of the first receiving groove 423. This restricts the abutting part 320, the first connecting member 300 and the connecting rod 200 from rotating relative to the push rod 400 along the first direction A, so that the first connecting member 300 is finally in the abutting position, preventing the first connecting member 300 from continuing to be inserted into the push rod 400.

[0048] Furthermore, this disclosure also provides an occluder system, including an occluder 600 and a pushing device for the occluder in any of the above embodiments. A connector 100 is threadedly connected to the occluder 600, and the force with which the connector 100 disengages from the occluder 600 is less than the force with which the first connecting member 300 disengages from the pushing rod at the abutment position. It should be noted that the force can be applied in various ways. Specifically, firstly, in a pushing device where the first connecting member 300 engages with the pushing rod 400, the engagement between the first connecting member 300 and the pushing rod 400 results in greater resistance to the first connecting member 300 disengaging from the pushing rod 400. This prevents the first connecting member 300 from separating from the pushing rod 400 when the pushing device is rotated to separate the connector 100 from the occluder 600. It is important to emphasize that, since the connector 100 is threadedly connected to the plugger, under normal circumstances, separation is achieved by rotating the pushing device to rotate the connector 100. This rotation direction is different from the disengagement direction of the first connector 300 and the push rod 400. Therefore, it is not easy for the first connector 300 to disengage from the push rod 400. Secondly, there is a certain degree of engagement between the first connector 300 and the push rod 400, so there will be resistance when separating them. Furthermore, the first elastic member 500 presses against the first connector 300 against the push rod 400, further preventing separation. Second, in the pushing device in which the first connector 300 and the push rod 400 abut against each other to form a resistance that prevents the connecting rod 200 and the push rod 400 from rotating relative to each other, since the resistance generated by the first connector 300 and the push rod 400 abutting against each other is greater than the force that causes the connector 100 and the plug 600 to separate from each other, the first connector 300 and the push rod 400 will not separate when the user rotates the pushing device to separate the connector 100 and the plug 600.

[0049] The advantage of the above solution is that, through the replaceable connector 100, the pushing device can be adapted to different occluders, allowing users to easily replace the occluders at any time. For example, Figure 13 The connector 100 shown is connected to the plug via an external thread. Figure 14 The connector shown is also connected to the plug via an external thread (not shown). However, since the two plugs have different size requirements, the user needs to adjust the corresponding connector to meet the requirements.

[0050] In addition, by restricting or hindering the relative rotation between the push rod 400 and the connecting rod 200 by the first connector 300, the push rod 400 and the connecting rod 200 are prevented from separating when the sealer is unsealed and the connector 100 is connected, thus ensuring the safety of the push device.

[0051] In this article, when expressing location, the operator of the instrument is generally used as a reference. Positions relatively close to the operator are referred to as "proximal," and positions relatively far from the operator are referred to as "distal." For ease of demonstration, ... Figure 12 The diagram shows a second direction B for indicating the specific orientation, where the second direction B extends from the proximal end to the distal end. Further, in this paper, the length direction of the anastomosis device can be referred to as the axial direction.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above embodiments merely illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

[0054] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A pushing device for a blocking device, characterized in that, The device includes a connector, a connecting rod, a first connecting member, and a push rod. The distal end of the push rod has a threaded hole. The distal end of the connecting rod is connected to the connector. The connector is used to install the plug. The proximal end of the connecting rod has a first thread to be threadedly connected to the threaded hole of the push rod. The first connecting member is slidably sleeved on the outside of the connecting rod, and the first connecting member can engage with the distal end of the push rod to restrict the rotation between the connecting rod and the push rod.

2. The pushing device for the occluder according to claim 1, characterized in that, The first connector has a through hole, through which the connecting rod can pass and cooperate with the connecting rod, so that when the first connector rotates, it drives the connecting rod to rotate.

3. The pushing device for the occluder according to claim 2, characterized in that, A first engaging groove is formed at the proximal end of the through hole. The push rod can be inserted into the first engaging groove. The first engaging groove cooperates with the push rod, so that when the push rod rotates, it drives the first connecting member to rotate.

4. The pushing device for the occluder according to claim 3, characterized in that, The distal end of the push rod is provided with a second connector that is fixedly connected to the push rod. The second connector has a boss, the cross-section of which is non-circular. The shape of the cross-section of the first engaging groove matches the shape of the cross-section of the boss.

5. The pushing device for the occluder according to claim 1, characterized in that, It also includes an elastic element, the distal end of which is connected to the connector head, and the proximal end of which is connected to the first connector.

6. A pushing device for a blocking device, characterized in that, The device includes a connector, a connecting rod, a first connecting member, and a push rod. The distal end of the push rod has a threaded hole, and the proximal end of the first connecting member has a second thread. The distal end of the connecting rod is connected to the connector. The connector is used to install the plug. The first connecting member is fixed to the connecting rod. When the first connecting member is in the abutting position, the first connecting member is threadedly connected to the push rod through the second thread and the threaded hole, and the first connecting member abuts against the push rod to form a resistance that prevents the connecting rod and the push rod from rotating relative to each other.

7. The pushing device for the occluder according to claim 6, characterized in that, The first connector has a first abutting slope, and the push rod has a second abutting slope. When the first connector is in the abutting position and the first connector rotates along the second thread to disengage from the push rod, the first abutting slope of the first connector and the second abutting slope of the push rod abut against each other to form a resistance that prevents the first connector and the push rod from rotating relative to each other.

8. The pushing device for the occluder according to claim 7, characterized in that, The first connector has an abutting portion, and a first abutting slope is formed in the abutting portion. The distal end of the push rod is provided with a third connector that is fixedly connected to the push rod. The third connector has a first receiving groove, and a second abutting slope is formed in the first receiving groove.

9. The pushing device for the occluder according to claim 8, characterized in that, The abutting portion has a first abutting limiting surface, and the first receiving groove has a second abutting limiting surface. When the first connector is in the abutting position, the first abutting limiting surface abuts against the second abutting limiting surface to restrict the first connector from continuing to be screwed into the push rod through the second thread.

10. A plugging device system, characterized in that, The device includes a plug and a pushing device for the plug as described in any one of claims 1-9, wherein the connector is threadedly connected to the plug, and the force with which the connector disengages from the plug is less than the force with which the first connector at the abutting position disengages from the pushing rod.

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