A multi-tiered release handle assembly

Abstract

The application discloses a multi-layer release handle assembly, which comprises a handle and a catheter, the catheter comprises a first catheter, a second catheter and a third catheter, the power mechanism comprises a first propulsion device, a second propulsion device, a third propulsion device and a fourth rotation device, wherein, in a first state, the implant is located in the first catheter, the first catheter retraction can expose the implant; in a second state, the first catheter reversely extends to make the implant fully expand; in a third state, the second catheter moves along its axial direction to fix the implant on a blood vessel; in a fourth state, the third catheter rotates around its axial direction to make the implant in a pre-detaching state; and in a fifth state, the third catheter moves along its axial direction to detach the implant from the third catheter.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically to a multi-stage release handle assembly. Background Technology

[0002] Cardiovascular and cerebrovascular diseases are the leading cause of death worldwide. Interventional surgery, due to its minimally invasive nature and high efficacy, has become the primary treatment for these diseases. Data shows that in 2020, my country saw 968,651 patients undergoing single coronary artery interventional treatment, ranking first in the world. Vascular closure refers to the process of closing the cavity created at the puncture site during minimally invasive cardiovascular diagnosis and interventional surgery to prevent blood loss. Typically, vascular closure can be achieved through four methods: manual compression, closure aids, surgical suturing, and vascular closure devices.

[0003] Manual compression hemostasis is the most traditional and currently the most commonly used method for arterial hemostasis. Its advantages lie in its economy and relative reliability; when other methods fail, this method is ultimately the only recourse. However, its disadvantages are also significant: it is time-consuming and laborious, and it exacerbates patient suffering. The compression hemostasis time after catheter removal is typically around 25 minutes. After compression hemostasis, pressure bandaging is required for 6–12 hours, followed by 18–24 hours of bed rest. In cases of patient obesity or puncture sites that are too high or too low, complications such as difficulty in compression, local hematoma, pseudoaneurysm, arteriovenous fistula, vagal reflex, and lower extremity deep vein thrombosis may occur. For large-diameter vessels, sutures and closure devices are necessary. Especially for surgeries such as valve implantation, in 2019, there were 9.1 million patients with tricuspid regurgitation, 10.3 million with mitral regurgitation, 3.8 million with aortic regurgitation, and 4.3 million with aortic stenosis in China, respectively. This shows that there is an urgent need to update the surgical techniques for vascular closure. According to Frost & Sullivan data, the number of vascular closure surgeries in China increased from 107,500 in 2015 to 274,300 in 2019, and is expected to further increase to 3,782,100 by 2030.

[0004] When using vascular closure devices, a suitable delivery system is required. For large-diameter vascular closure devices, the corresponding delivery systems are often bulky and cumbersome. For example, when using Proglide suture-type closure devices, the handle structure is complex, requiring multiple operational steps and demanding a high level of skill from the surgeon, resulting in a long learning curve. Even conventional vascular closure device delivery handles present several problems, such as difficulty in operating the various components, susceptibility to misoperation, non-ergonomic design, and inaccurate positioning of the internal catheter displacement. These issues increase surgical risks. Therefore, there is a need to develop a simple and streamlined delivery handle to reduce surgical risks. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the cumbersome operation steps of the handle in the prior art and to provide a multi-level release handle assembly.

[0006] The present invention solves the above-mentioned technical problems by means of the following technical solution: a multi-level release handle assembly, the handle assembly including a handle and a conduit, the handle including a housing and a power mechanism, the power mechanism being mounted on the housing;

[0007] The conduit includes a first conduit, a second conduit, and a third conduit. The power mechanism includes a first propulsion device, a second propulsion device, a third propulsion device, and a fourth rotation device. The first propulsion device is connected to the first conduit to drive the first conduit to move along the axial direction of the first conduit. The second propulsion device is connected to the second conduit to drive the second conduit to move along the axial direction of the second conduit. The third propulsion device is connected to the third conduit to drive the third conduit to move along the axial direction of the third conduit. The fourth rotation device is connected to the third conduit to drive the third conduit to rotate around the central axis of the third conduit.

[0008] The first catheter, the second catheter, and the third catheter are sequentially sleeved from the outside to the inside, and the third catheter is used to connect the implant.

[0009] In the first state, the implant is located inside the first catheter, and the retraction of the first catheter can expose the implant.

[0010] In the second state, the first catheter extends in the reverse direction, allowing the implant to fully deploy.

[0011] In the third state, the movement of the second catheter along its axial direction enables the implant to be fixed to the blood vessel.

[0012] In the fourth state, rotation of the third catheter about its axis can put the implant in a pre-release state;

[0013] In the fifth state, the movement of the third catheter along its axial direction can detach the implant from the third catheter.

[0014] In this design, a first propulsion device drives the first catheter to move axially, allowing it to extend and retract. In the first state, the retraction of the first catheter exposes the implant hidden within it, which expands to prepare for subsequent deployment. In the second state, the first catheter extends and rests against the exposed implant, allowing it to fully deploy. In the third state, the second propulsion device moves the second catheter to fix the implant to the blood vessel. In the fourth state, a fourth rotation device rotates and drives the third catheter to rotate, putting the implant into a pre-release state, preparing for subsequent release. In the fifth state, the third propulsion device moves the third catheter to release the implant. Through the coordination of the power mechanism in different states, the implant can be precisely deployed and retracted during surgery, maintaining its fixation within the blood vessel. The handle assembly of this design requires only five steps to fix the implant to the blood vessel, simplifying the operation and facilitating surgeons. The power mechanism and each catheter correspond one-to-one, resulting in smoother operation, reduced errors, and lower surgical risks.

[0015] Preferably, the handle assembly includes a feedback mechanism, which includes cooperating paddles and a plurality of positioning teeth;

[0016] The power mechanism includes a rotating wheel component connected to the guide tube. The rotating wheel component rotates to drive the guide tube to move. A plurality of positioning teeth are arranged on the rotating wheel component and distributed along the circumference of the rotating wheel component. The rotation of the rotating wheel component enables the paddle to switch between the plurality of positioning teeth.

[0017] In this design, the number of times the positioning teeth switch can provide feedback on the rotation angle (number of revolutions) of the rotating wheel. Since the rotation of the rotating wheel can drive the catheter to move, the feedback mechanism can more accurately position and control the distance of the catheter's movement.

[0018] Preferably, the positioning teeth are distributed on the inner circumferential surface of the rotating wheel.

[0019] In this design, the feedback mechanism's paddle and positioning teeth are positioned within the rotating wheel, resulting in a more rational overall structure and a more compact design.

[0020] Preferably, the second propulsion device includes a screw, and the rotating wheel and the screw are respectively provided with mutually cooperating internal threads and external threads. The second conduit is fixed on the screw, and the rotating wheel rotates to drive the screw to move along the axial direction of the second conduit.

[0021] In this design, the structure utilizes the threaded engagement between the screw and the rotating wheel to control the second catheter. The second propulsion device can more precisely control the movement of the second catheter, making it easier for doctors to operate.

[0022] Preferably, the handle assembly further includes a locking mechanism disposed on the housing, the locking mechanism being used to lock and unlock the third propulsion device and / or the fourth rotation device.

[0023] In this design, the structure uses a locking mechanism to lock and unlock the third propulsion device and the fourth rotation device, preventing the implant from prematurely entering the pre-unlocked state or prematurely unlocking due to accidental contact, thus reducing operational errors and ensuring the accuracy of implant release.

[0024] Preferably, the locking mechanism is distributed between the third propulsion device and the fourth rotation device. The locking mechanism includes a first locking member, which has a first locking position and a second locking position. The first locking position is used to lock the third propulsion device, and the second locking position is used to lock the fourth rotation device. The first locking member switches between the first locking position and the second locking position to lock and unlock.

[0025] In this design, the first locking member has two locking positions, specifically for locking the third propulsion device and the fourth rotation device. Furthermore, the first locking member can easily switch between these two positions to lock the third propulsion device and unlock the fourth rotation device, or vice versa, making operation more convenient for doctors.

[0026] Preferably, the locking mechanism further includes a second locking member, which includes a third locking position and an unlocking position. The third locking position is used to lock the third propulsion device, and the second locking member switches between the third locking position and the unlocking position to lock and unlock.

[0027] In this design, the second locking member can lock the third propulsion device, preventing the third propulsion device from being mistakenly locked when the first locking member is locked to the fourth rotating device in the second locking position in the initial state. Furthermore, before entering the pre-release state, the first locking member needs to be unlocked, and the third propulsion device is controlled to extend the third catheter, thus releasing the restriction on implant rotation. Then, the first locking member is switched to the first locking position to unlock the fourth rotating device while locking the third propulsion device. At this point, the fourth rotating device is controlled to rotate the third catheter, allowing the implant to enter the pre-release state. Next, the first locking member is switched to the second locking position to unlock the third propulsion device while locking the fourth rotating device. By controlling the third propulsion device to move the third catheter, the implant is released. When operating either the third propulsion device or the fourth rotating device, the other is locked, reducing operational errors. Moreover, the cooperation between the first and second locking members simplifies the entire process by requiring only three switching operations (locking or unlocking).

[0028] Preferably, the first propulsion device, the second propulsion device, the third propulsion device, and the fourth rotation device are sequentially distributed on the housing from the open end of the handle to the tail end of the handle.

[0029] In this design, the first propulsion device needs to extend and retract, with a large adjustment range, while the fixing and unfixing of the second, third, and fourth rotation devices are all fine-tuned within a small range. This positional distribution makes the handle more stable and better balanced during propulsion, thus enabling smoother control of the handle, which is more ergonomic.

[0030] The present invention also discloses a method of using the above-mentioned multi-level release handle assembly, which includes the following steps:

[0031] Control the first propulsion device to retract the first catheter so that the implant is exposed in the first catheter;

[0032] Control the first propulsion device to extend the first catheter in the reverse direction so that the implant can be fully deployed;

[0033] The second propulsion device is controlled to move the second catheter so that the implant is fixed on the blood vessel;

[0034] The fourth rotating device is controlled to rotate the third catheter so that the implant enters a pre-release state;

[0035] Control the third propulsion device to move the third catheter so as to detach the implant from the third catheter.

[0036] In this approach, the implant can be fixed to the blood vessel in just five steps. The required steps and teaching period are relatively short, making it easy to master and apply, which greatly shortens the operation time and improves the safety of the operation.

[0037] Preferably, the step of securing the implant to the blood vessel further includes the step of: controlling the second propulsion device to extend the second catheter so as to secure the implant to the blood vessel;

[0038] And / or, the step of detaching the implant from the third catheter further includes the step of: controlling the third propulsion device to retract the third catheter to detach the implant from the third catheter.

[0039] Preferably, between the step of fixing the implant to the blood vessel and the step of the implant entering the pre-release state, there is also a step of controlling the third propulsion device to extend the third catheter to release the restriction on the rotation of the implant.

[0040] In this approach, by first removing the restriction on the rotation of the implant and then allowing the implant to enter a pre-release state, the doctor can avoid accidentally touching the fourth rotation device and causing the implant to enter the pre-release state prematurely.

[0041] Preferably, the handle assembly further includes a locking mechanism distributed between the third propulsion device and the fourth rotation device. The locking mechanism includes a first locking member and a second locking member. The first locking member has a first locking position and a second locking position. The first locking position is used to lock the third propulsion device, and the second locking position is used to lock the fourth rotation device. The first locking member switches between the first locking position and the second locking position to lock and unlock.

[0042] The second locking member includes a third locking position and an unlocking position. The third locking position is used to lock the third propulsion device. The second locking member switches between the third locking position and the unlocking position to lock and unlock.

[0043] The step prior to the step of releasing the restriction on the rotation of the implant includes: switching the second locking element to the unlocked position;

[0044] Between the step of releasing the restriction on the rotation of the implant and the step of the implant entering the pre-release state, the step of switching the first locking member to the first locking position is also included;

[0045] Between the step of the implant entering the pre-release state and the step of the implant being released from the third catheter, there is also a step of switching the first locking element to the second locking position.

[0046] In this solution, the method only requires switching between the first locking element and the second locking element three times. Moreover, when operating one of the third propulsion device and the fourth rotation device, it can ensure that the other is in a locked state, which not only avoids accidental touches and thus ensures accuracy, but also simplifies the operation.

[0047] The positive and progressive effects of this invention are as follows: The first propulsion device drives the first catheter to move axially, allowing it to extend and retract. In use, in the first state, the retraction of the first catheter exposes the implant hidden within it, which expands to a certain extent in preparation for subsequent deployment. In the second state, the first catheter extends and presses against the exposed implant, allowing it to fully deploy. In the third state, the second propulsion device drives the second catheter to fix the implant to the blood vessel. In the fourth state, the fourth rotating device rotates and drives the third catheter to rotate, putting the implant into a pre-release state in preparation for subsequent release. In the fifth state, the third propulsion device drives the third catheter to release the implant. Through the coordination of the power mechanism in different states, the implant can be precisely deployed and retracted during surgery, maintaining its fixation within the blood vessel. The handle assembly of this solution requires only five steps to fix the implant to the blood vessel, simplifying the operation and facilitating doctor operation. The power mechanism and each catheter correspond one-to-one, resulting in smoother operation, reduced operational errors, and thus lower surgical risks. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the multi-level release handle assembly according to Embodiment 1 of the present invention.

[0049] Figure 2 This is a schematic diagram of the handle structure of Embodiment 1 of the present invention (I).

[0050] Figure 3 This is a schematic diagram (II) of the handle structure of Embodiment 1 of the present invention.

[0051] Figure 4 This is a cross-sectional view (a) of the handle of Embodiment 1 of the present invention.

[0052] Figure 5 This is a cross-sectional view (II) of the handle of Embodiment 1 of the present invention.

[0053] Figure 6 This is a schematic diagram of the internal structure of the multi-level release handle assembly according to Embodiment 1 of the present invention.

[0054] Figure 7 This is a schematic diagram of the rotating wheel and the lever in Embodiment 1 of the present invention.

[0055] Figure 8This is a schematic diagram of the assembly structure of the first locking member and the second locking member of the handle in Embodiment 1 of the present invention.

[0056] Figure 9 This is a schematic diagram of the anchoring structure before it is fixed according to Embodiment 1 of the present invention.

[0057] Figure 10 This is a schematic diagram of the anchoring structure after it is fixed according to Embodiment 1 of the present invention.

[0058] Figure 11 This is a schematic diagram of the connector of the implant according to Embodiment 1 of the present invention.

[0059] Figure 12 This is a partial structural diagram of the third catheter in Embodiment 1 of the present invention.

[0060] Figure 13 This is a flowchart illustrating the usage method of the multi-level release handle assembly according to Embodiment 1 of the present invention.

[0061] Figure 14 This is a schematic diagram of the multi-level release handle assembly according to Embodiment 2 of the present invention.

[0062] Explanation of reference numerals in the attached figures

[0063] Casing 1

[0064] Transparent area 11

[0065] First propulsion device 21

[0066] Second propulsion device 22

[0067] Rotary component 221

[0068] Screw 222

[0069] Pick 223

[0070] Positioning teeth 224

[0071] Third propulsion device 23

[0072] Fourth rotating device 24

[0073] Mark 25

[0074] Catheter 3

[0075] First catheter 31

[0076] Second catheter 32

[0077] Third catheter 33

[0078] Card Block 331

[0079] Tail end 41

[0080] Open end 42

[0081] Implant 5

[0082] Connector 51

[0083] First limiting groove 511

[0084] Second limiting groove 512

[0085] 513 protrusions

[0086] Anchoring structure 52

[0087] Anchor foot 521

[0088] Locking mechanism 6

[0089] First locking element 61

[0090] First locking tongue 613

[0091] Second locking tongue 614

[0092] Second locking element 62

[0093] Third locking tongue 622 Detailed Implementation

[0094] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0095] Example 1

[0096] like Figures 1-10 As shown, this embodiment discloses a multi-level release handle assembly. The handle assembly includes a handle and a conduit 3. The handle includes a housing 1 and a power mechanism, with the power mechanism mounted on the housing 1. The conduit 3 includes a first conduit 31, a second conduit 32, and a third conduit 33. The power mechanism includes a first propulsion device 21, a second propulsion device 22, a third propulsion device 23, and a fourth rotation device 24. The first propulsion device 21 is connected to the first conduit 31 to drive the first conduit 31 to move along the axial direction of the first conduit 31. The second propulsion device 22 is connected to the second conduit 32 to drive the second conduit 32 to move along the axial direction of the second conduit 32. The third propulsion device 23 is connected to the third conduit 33 to drive the third conduit 33 to move along the axial direction of the third conduit 33. The fourth rotation device 24 is connected to the third conduit 33 to drive the third conduit 33 to rotate around the central axis of the third conduit 33.

[0097] The first catheter 31, the second catheter 32, and the third catheter 33 are sequentially sleeved from the outside to the inside, with the third catheter 33 used to connect the implant 5. In the first state, the handle assembly has the implant 5 located inside the first catheter 31, and the retraction of the first catheter 31 can expose the implant 5. In the second state, the first catheter 31 extends in the opposite direction to fully unfold the implant 5. In the third state, the second catheter 32 moves along its axis to fix the implant 5 to the blood vessel. In the fourth state, the third catheter 33 rotates around its axis to put the implant 5 in a pre-release state. In the fifth state, the third catheter 33 moves along its axis to detach the implant 5 from the third catheter 33.

[0098] In this embodiment, the first propulsion device 21 drives the first catheter 31 to move axially, allowing the first catheter 31 to extend and retract. In use, in the first state, the retraction of the first catheter 31 exposes the implant 5 hidden within it. After exposure, the implant 5 expands to a certain extent, preparing for subsequent deployment. In the second state, the first catheter 31 extends and presses against the exposed implant 5, allowing it to fully deploy. In the third state, the second propulsion device 22 drives the second catheter 32 to move, thereby fixing the implant 5 to the blood vessel. In the fourth state, the fourth rotation device... 24 rotates and drives the third catheter 33 to rotate, causing the implant 5 to enter the pre-release state, preparing for subsequent release. In the fifth state, the third propulsion device 23 drives the third catheter 33 to release the implant 5. Through the cooperation of the power mechanism in different states, the implant 5 can be accurately released and released during the operation, and the implant 5 can be kept fixed inside the blood vessel. The handle assembly of this solution only requires five steps to fix the implant 5 on the blood vessel. The operation steps are simpler and easier for doctors to operate. The power mechanism and each catheter 3 correspond one-to-one, making the operation smoother, reducing operation errors, and thus reducing surgical risks.

[0099] like Figures 1-7 As shown, the handle assembly includes a feedback mechanism, which includes a paddle 223 that cooperates with each other and multiple positioning teeth 224; the power mechanism includes a rotating wheel 221, which is connected to the guide tube 3. The rotating wheel 221 rotates to drive the guide tube 3 to move. Multiple positioning teeth 224 are arranged on the rotating wheel 221 and distributed along the circumference of the rotating wheel 221. The rotation of the rotating wheel 221 enables the paddle 223 to switch between the multiple positioning teeth 224.

[0100] In this embodiment, the number of times the positioning teeth 224 are switched can provide feedback on the rotation angle (number of revolutions) of the rotating wheel 221. Since the rotation of the rotating wheel 221 can drive the conduit 3 to move, the feedback mechanism can more accurately position and control the distance of the conduit 3's movement.

[0101] Specifically, in this embodiment, the rotating wheel 221 is provided with a mark 25, and the housing 1 is provided with a pointer. By observing the mark 25 and the pointer, the rotation angle of the rotating wheel 221 can be determined, thereby determining the displacement of the corresponding conduit 3. By using the feedback mechanism and the form of the pointer and mark 25, the displacement of the conduit 3 can be controlled more accurately. The housing 1 is provided with a transparent area 11, which is made of transparent material. The displacement of the first conduit 31 can be observed through the transparent area 11.

[0102] like Figure 7 As shown, the positioning teeth 224 are distributed on the inner circumferential surface of the rotating wheel 221. The paddle 223 of the feedback mechanism and the positioning teeth 224 cooperate inside the rotating wheel 221, which is more reasonable and makes the overall structure more compact. Of course, in other alternative embodiments, the positioning teeth 224 can also be provided on the outer circumferential surface of the rotating wheel 221.

[0103] like Figure 6 As shown, the second propulsion device 22 includes a screw 222, a rotating wheel 221, and a screw 222 with mating internal and external threads. The second catheter 32 is fixed to the screw 222. The rotating wheel 221 rotates to drive the screw 222 to move axially along the second catheter 32. The screw 222 and the rotating wheel 221 are used to control the second catheter 32, allowing for more precise control of its movement and facilitating doctor's operation.

[0104] like Figure 4 and Figure 8 The handle assembly also includes a locking mechanism 6, which is mounted on the housing 1. The locking mechanism 6 is used to lock and unlock the third propulsion device 23 and / or the fourth rotation device 24. By locking and unlocking the third propulsion device 23 and the fourth rotation device 24 through the locking mechanism 6, the implant 5 is prevented from prematurely entering the pre-unlocked state or prematurely unlocking due to accidental contact, thereby reducing operational errors and ensuring the accuracy of implant 5 release.

[0105] like Figure 8 As shown, the locking mechanism 6 is distributed between the third propulsion device 23 and the fourth rotation device 24. The locking mechanism 6 includes a first locking member 61, which has a first locking position and a second locking position. The first locking position is used to lock the third propulsion device 23, and the second locking position is used to lock the fourth rotation device 24. The first locking member 61 switches between the first locking position and the second locking position to lock and unlock.

[0106] In this embodiment, the first locking member 61 has two locking positions, which are specifically used to lock the third propulsion device 23 and the fourth rotation device 24, respectively. Furthermore, the first locking member 61 can be easily switched between these two positions to lock the third propulsion device 23 and unlock the fourth rotation device 24, or vice versa, making it more convenient for doctors to operate.

[0107] like Figure 8 As shown, the locking mechanism 6 also includes a second locking member 62, which includes a third locking position and an unlocking position. The third locking position is used to lock the third propulsion device 23. The second locking member 62 switches between the third locking position and the unlocking position to lock and unlock.

[0108] In this embodiment, the second locking member 62 can lock the third propulsion device 23, preventing the third propulsion device 23 from being mistakenly locked when the first locking member 61 locks the fourth rotating device 24 in the second locking position in the initial state. Moreover, before entering the pre-release state, the first locking member 61 needs to be unlocked, and the third propulsion device 23 needs to be controlled to extend the third catheter 33 to first release the restriction on the rotation of the implant 5. Afterward, the first locking member 61 is switched to the first locking position to unlock the fourth rotating device 24, while locking the third propulsion device 23. At this time, the fourth rotating device is controlled. Position 24 rotates the third catheter 33 to bring the implant 5 into a pre-release state; then, switch the first locking member 61 to the second locking position to unlock the third propulsion device 23 and lock the fourth rotation device 24. By controlling the third propulsion device 23, the third catheter 33 is moved, thus releasing the implant 5. When operating either the third propulsion device 23 or the fourth rotation device 24, the other is locked, reducing operational errors. Moreover, the cooperation of the first locking member 61 and the second locking member 62 makes the entire process only require three switching operations (locking or unlocking three times), making the operation simpler.

[0109] Specifically, the first locking member 61 includes a first locking tongue 613 and a second locking tongue 614. The first locking tongue 613 is located at one end near the third pushing device 23, and the second locking tongue 614 is located at one end near the fourth rotating device 24. The third pushing device 23 and the fourth rotating device 24 are respectively provided with locking seats (not shown in the figure) that cooperate with the first locking tongue 613 and the second locking tongue 614 to achieve locking. When the first locking member 61 moves towards the third pushing device 23, the first locking member 61 switches to the first locking position. At this time, the first locking tongue 613 cooperates with the locking seat of the third pushing device 23 to lock the third pushing device 23, and the second locking tongue 614 moves away from the locking seat of the fourth rotating device 24, thus unlocking the fourth rotating device 24. Conversely, when the first locking member 61 moves towards the fourth rotating device 24, the fourth rotating device 24 is locked, and the third pushing device 23 is unlocked.

[0110] like Figure 8 As shown, the second locking member 62 includes a third locking tongue 622. The locking principle is the same as that of the first locking member 61. The difference is that the second locking member 62 has a locking tongue only at one end near the third propulsion device 23.

[0111] like Figure 2 As shown, the first propulsion device 21, the second propulsion device 22, the third propulsion device 23, and the fourth rotation device 24 are distributed sequentially on the housing 1 from the opening end 42 of the handle to the tail end 41 of the handle. The first propulsion device 21 needs to extend and retract, with a large adjustment range, while the fixing and unfixing of the second propulsion device 22, the third propulsion device 23, and the fourth rotation device 24 are all fine-tuned within a small range. This positional distribution makes the handle more stable and has better balance during propulsion, thus allowing for smoother control of the handle, and making the handle more ergonomic.

[0112] Specifically, in this embodiment, the first state is the initial state of the handle assembly, with one end of the third catheter 33 connected to the implant 5 inside the first catheter 31, so that the implant 5 is located inside the first catheter 31; the second state is the exposed state of the implant 5, that is, the implant 5 is exposed and has a certain degree of expansion but has not fully unfolded; the third state is the unfolded state of the implant 5, at this time, the implant 5 has been fully unfolded and needs to be fixed to the blood vessel; the fourth state is the fixed state of the implant 5, which needs to be further put into a pre-release state; the fifth state is the pre-release state of the implant 5, which needs to be released to release the implant 5.

[0113] like Figure 9 and Figure 10As shown, the end of the second catheter 32 is connected to an anchoring structure 52, wherein the anchoring structure 52 has an anchoring foot 521. The end of the second catheter 32 abuts against the end face of the anchoring structure (the end away from the anchoring foot 521). In the third state, after the second catheter 32 extends, it pushes the anchoring structure 52, so that the anchoring foot 521 engages with the adipose tissue of the outer wall of the blood vessel. At this time, the blood vessel is closed by the implant 5 (membrane structure) and the anchoring structure 52, thereby fixing the implant 5 to the blood vessel.

[0114] like Figure 11 and Figure 12 As shown, the end of the third catheter 33 has a locking block 331, and the connector 51 of the implant 5 includes a first limiting groove 511 and a second limiting groove 512. The first limiting groove 511 is also provided with a protrusion 513. Before the implant 5 enters the pre-release state, the locking block 331 of the third catheter 33 is locked in the first limiting groove 511, and the protrusion 513 limits the locking block 331, restricting the rotation of the connector 51. Before the implant 5 is released, the third propulsion device 23 extends the third catheter 33, causing the locking block 331 to disengage from the limit of the protrusion 513, thus releasing the restriction on the rotation of the implant 5 and entering the pre-release state; during the pre-release, the fourth rotation device 24 rotates the third catheter 33, causing the locking block 331 to rotate into the second limiting groove 512, at which time the restriction of the locking block 331 on the first limiting groove 511 of the connector 51 is released; during the release, the third propulsion device 23 retracts the third catheter 33 in the opposite direction, and the locking block 331 retracts along the second limiting groove 512, thereby releasing the implant 5.

[0115] like Figure 13 As shown, this embodiment also discloses a method for using the above-mentioned handle assembly, which includes the following steps:

[0116] Control the first propulsion device 21 to retract the first catheter 31 so that the implant 5 is exposed in the first catheter 31;

[0117] Control the first propulsion device 21 to cause the first catheter 31 to extend in the reverse direction, so that the implant 5 is fully deployed;

[0118] The second propulsion device 22 is controlled to move the second catheter 32 so that the implant 5 is fixed on the blood vessel;

[0119] The fourth rotating device 24 is controlled to rotate the third catheter 33 so that the implant 5 enters the pre-release state;

[0120] Control the third propulsion device 23 to move the third catheter 33 so as to detach the implant 5 from the third catheter 33.

[0121] In this embodiment, the method only requires five steps to fix the implant 5 to the blood vessel. The required steps and teaching period are relatively short, making it easy to master and apply, which greatly shortens the operation time and improves the safety of the operation.

[0122] In this embodiment, the step of fixing the implant 5 to the blood vessel further includes the step of controlling the second propulsion device 22 to extend the second catheter 32 so that the implant 5 is fixed to the blood vessel; of course, in other alternative embodiments, this step can also be to fix the implant 5 by retracting the second catheter 32.

[0123] In this embodiment, the step of detaching the implant 5 from the third catheter 33 further includes controlling the third propulsion device 23 to retract the third catheter 33, thereby detaching the implant 5 from the third catheter 33. Of course, in other alternative embodiments, this step can also involve extending the third catheter 33 to detach the implant 5.

[0124] In this embodiment, between the steps of fixing the implant 5 to the blood vessel and the step of the implant 5 entering the pre-release state, a further step is included: controlling the third propulsion device 23 to extend the third catheter 33 to release the restriction on the rotation of the implant 5. By first releasing the restriction on the rotation of the implant 5 and then allowing the implant 5 to enter the pre-release state, the doctor is prevented from accidentally touching the fourth rotation device 24 and causing the implant 5 to enter the pre-release state prematurely. Of course, in other alternative embodiments, the protrusion 513 may not be provided in the connector 51, so that the implant 5 can directly enter the pre-release state without first releasing the restriction on the rotation of the implant 5.

[0125] In this embodiment, the step of switching the second locking member 62 to the unlocked position is included before the step of releasing the restriction on the rotation of the implant 5;

[0126] Between the step of releasing the restriction on the rotation of the implant 5 and the step of the implant 5 entering the pre-release state, the step of switching the first locking member 61 to the first locking position is also included.

[0127] Between the step of the implant 5 entering the pre-release state and the step of the implant 5 being released from the third catheter 33, there is also a step of switching the first locking member 61 to the second locking position.

[0128] In this embodiment, the method only requires switching between the first locking member 61 and the second locking member 62 three times. Moreover, when operating one of the third propulsion device 23 and the fourth rotation device 24, it can ensure that the other is in a locked state, which avoids accidental touches and ensures accuracy, while also simplifying the operation.

[0129] Example 2

[0130] like Figure 14As shown, both the second propulsion device 22 and the third propulsion device 23 adopt mechanical propulsion. Both the second propulsion device 22 and the third propulsion device 23 include a pusher and an inner rod. The pusher and the inner rod are fixedly connected. The movement of the pusher can drive the inner rod to move along its axial direction. The second conduit 32 and the third conduit 33 are fixedly connected to the corresponding inner rods. The user pushes the external pusher, thereby driving the inner rod and the second conduit 32 and the third conduit 33 connected to the corresponding inner rods to move.

[0131] Specifically, in this embodiment, the inner rod is bonded to the pusher, and the second conduit 32 and the third conduit 33 are respectively bonded to the corresponding inner rod. Of course, in other alternative embodiments, the connection between the inner rod and the pusher, as well as between the second conduit 32, the third conduit 33 and the inner rod, can also be a mechanical fastening connection.

[0132] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A multi-stage release handle assembly, characterized in that, The handle assembly includes a handle and a conduit, the handle including a housing and a power mechanism, the power mechanism being mounted on the housing; The conduit includes a first conduit, a second conduit, and a third conduit. The power mechanism includes a first propulsion device, a second propulsion device, a third propulsion device, and a fourth rotation device. The first propulsion device is connected to the first conduit to drive the first conduit to move along the axial direction of the first conduit. The second propulsion device is connected to the second conduit to drive the second conduit to move along the axial direction of the second conduit. The third propulsion device is connected to the third conduit to drive the third conduit to move along the axial direction of the third conduit. The fourth rotation device is connected to the third conduit to drive the third conduit to rotate around the central axis of the third conduit. The first catheter, the second catheter, and the third catheter are sequentially sleeved from the outside to the inside, and the third catheter is used to connect the implant. In the first state, the implant is located inside the first catheter, and the retraction of the first catheter can expose the implant. In the second state, the first catheter extends in the reverse direction, allowing the implant to fully deploy. In the third state, the movement of the second catheter along its axial direction enables the implant to be fixed to the blood vessel. In the fourth state, rotation of the third catheter about its axis can put the implant in a pre-release state; In the fifth state, the movement of the third catheter along its axial direction enables the implant to be detached from the third catheter; The handle assembly also includes a locking mechanism disposed on the housing, the locking mechanism being used to lock and unlock the third propulsion device and / or the fourth rotation device.

2. The multi-stage release handle assembly as described in claim 1, characterized in that, The handle assembly includes a feedback mechanism, which includes cooperating paddles and multiple positioning teeth; The power mechanism includes a rotating wheel component connected to the guide tube. The rotating wheel component rotates to drive the guide tube to move. A plurality of positioning teeth are arranged on the rotating wheel component and distributed along the circumference of the rotating wheel component. The rotation of the rotating wheel component enables the paddle to switch between the plurality of positioning teeth.

3. The multi-stage release handle assembly as described in claim 2, characterized in that, The positioning teeth are distributed on the inner circumferential surface of the rotating wheel.

4. The multi-stage release handle assembly as described in claim 2, characterized in that, The second propulsion device includes a screw, and the rotating wheel and the screw are respectively provided with mutually cooperating internal threads and external threads. The second conduit is fixed on the screw, and the rotating wheel rotates to drive the screw to move along the axial direction of the second conduit.

5. The multi-stage release handle assembly as described in claim 1, characterized in that, The locking mechanism is distributed between the third propulsion device and the fourth rotation device. The locking mechanism includes a first locking member, which has a first locking position and a second locking position. The first locking position is used to lock the third propulsion device, and the second locking position is used to lock the fourth rotation device. The first locking member switches between the first locking position and the second locking position to lock and unlock.

6. The multi-stage release handle assembly as described in claim 5, characterized in that, The locking mechanism further includes a second locking member, which has a third locking position and an unlocking position. The third locking position is used to lock the third propulsion device, and the second locking member switches between the third locking position and the unlocking position to lock and unlock.

7. The multi-stage release handle assembly as described in any one of claims 1-6, characterized in that, The first propulsion device, the second propulsion device, the third propulsion device, and the fourth rotation device are sequentially distributed on the housing from the open end of the handle to the tail end of the handle.

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