Cardiac interventional valve transfer device

Abstract

This application provides a cardiac interventional valve transfer device. Relating to the field of medical devices, the transfer device includes a compression body with an inner cavity for storing a cardiac interventional valve; a compression base capable of at least partially extending into the inner cavity of the compression body and sliding axially thereon, the compression base capable of partially pushing the cardiac interventional valve out from its small end; a sliding tube capable of being fixed at the small end of the inner cavity of the compression body when locked by a locking device, and capable of leaving the inner cavity of the compression body from the small end when the locking device is released; and a sheath inserter capable of engaging with the small end of the compression body, during which the sheath inserter can release the locking device from fixing the sliding tube. The transfer device according to this application has a simple structure and is easy to use.

Description

[0001] This application takes Chinese patent application No. 2023108558617, filed on July 13, 2023, entitled "Storage and Transfer Device for Interventional Cardiac Valves" as its parent application. Technical Field

[0002] This application relates to the field of medical devices, particularly cardiac interventional valve transfer devices involved in transcatheter valve replacement surgery. Background Technology

[0003] Transcatheter valve replacement (TCV) is a minimally invasive procedure that places a cardiac valve (hereinafter referred to as a valve) through a catheter. This involves inserting the valve into the patient's body through a very small surgical incision.

[0004] Due to the structural complexity of interventional cardiac valves (such as retractable bioprosthetic valves), the valve is typically placed on a valve stent, and the valve, along with the stent, is stored in a storage device. During the procedure, the operator removes the valve (usually along with a bioresorbable stent) from the storage device, loads it into a catheter via a separate transfer device, and further introduces it into the patient.

[0005] The valve storage device and valve transfer device in the prior art are two separate devices, and the transfer of valves during surgery is a very complex operation.

[0006] For example, Chinese Patent Publication CN114191143A discloses a valve loading tool (analogous to the transfer device of this application). When using this tool to transfer a valve, the valve needs to be compressed in two steps, and the guide seat needs to be reversed during these two steps. Furthermore, the loading of the valve by this tool is performed intraoperatively before the valve transfer; that is, the valve needs to be loaded onto the loading tool first during the operation, and then transferred in two steps. The device is costly and difficult to operate. Summary of the Invention

[0007] The purpose of this application is to overcome or at least mitigate the shortcomings of the prior art and provide a simple and easy-to-use cardiac interventional valve transfer device.

[0008] According to a first aspect of this application, a cardiac interventional valve transfer device is provided, comprising:

[0009] The compression body is tubular, with a small end and a large end in the axial direction, and the inner cavity is used to store the cardiac interventional valve;

[0010] A compression base, capable of at least partially extending into the cavity of the compression body and sliding axially, the compression base being able to partially push the cardiac interventional valve out from the small end; and

[0011] The slide tube is tubular and has a tapered inner cavity. It can be fixed at the small end of the inner cavity of the compression body when locked by the locking device, and can leave the inner cavity of the compression body from the small end when the locking device is unlocked.

[0012] A tubular sheath inserter is capable of engaging with the small end of the compression body. During the engagement process, the sheath inserter can release the locking device from fixing the slide tube.

[0013] After the locking device is released, the sliding tube moves from the compression body to the inner cavity of the sheath under the action of the interventional cardiac valve, and provides guidance for the contraction of the interventional cardiac valve within the sheath.

[0014] In at least one embodiment, the compression body includes an outlet cylinder located at the small end, the outlet cylinder having at least two first slits extending in the axial direction, and an inner clamping arm formed between the two first slits.

[0015] The inner clamping arm can apply a radially inward force to the slide tube to clamp it, or

[0016] The inner clamping arm can be opened radially outward to release the slide tube.

[0017] In at least one embodiment, a tube mating portion is formed on the inner peripheral wall of the inner clamping arm, and a tube matching portion is formed on the outer peripheral wall of the sliding tube, wherein the tube mating portion and the tube matching portion are shape-locked.

[0018] In at least one embodiment, the locking device further includes a retaining ring that can be fitted around the outer periphery of the outlet cylinder to restrict the inner clamping arm from being pushed outward in a radial direction.

[0019] In at least one embodiment, the compression body further includes at least two outer clamping arms located on the outer periphery of the outlet cylinder portion. When the fixing ring is sleeved on the outer periphery of the outlet cylinder portion, the fixing ring is located on the inner periphery of the outer clamping arms and clamped by the outer clamping arms.

[0020] During the process of the sheath feeder docking with the small end of the compression body, the sheath feeder axially presses the fixing ring, causing the fixing ring to disengage from the outer clamping arm and the locking device to release.

[0021] In at least one embodiment, a ring engagement portion is formed on the inner peripheral wall of the outer clamping arm, and a ring mating portion is formed on the outer peripheral wall of the fixing ring, wherein the ring engagement portion and the ring mating portion are shape-locked together.

[0022] In at least one embodiment, the sheath feeder includes a first section, a second section, and a third section, wherein the inner diameter of the first section is larger than the inner diameter of the second section, and the inner diameter of the second section is larger than the inner diameter of the third section.

[0023] The first segment includes a first segment large area and a first segment small area. The inner diameter of the first segment large area is larger than the inner diameter of the first segment small area. The inner diameter of the first segment large area is not less than the outer diameter of the fixing ring. The inner diameter of the first segment small area is smaller than the outer diameter of the fixing ring. A first step surface is formed between the first segment large area and the first segment small area.

[0024] During the process of the first section being fitted onto the small end of the compression body, the first step surface squeezes the fixing ring in the circumferential direction, causing the fixing ring to disengage from the outer clamping arm.

[0025] In at least one embodiment, a second stepped surface is formed between the second section and the third section; the inner diameter of the second section is equal to the outer diameter of the slide tube, and the minimum inner diameter of the slide tube is not greater than the inner diameter of the third section;

[0026] After the sliding tube moves into the inner cavity of the sheath, it abuts against the second step surface under the action of the cardiac interventional valve, guiding the cardiac interventional valve to contract to the third segment.

[0027] In at least one embodiment, the transfer device further includes a push rod, one axial end of which is formed as a mating end, the outer diameter of which is smaller than the inner diameter of the slide tube.

[0028] The push rod has a recessed portion on its peripheral wall at the docking end, forming multiple ear-mounted positioning grooves. The number and position of these grooves are adapted to the ear-mounted features of the cardiac interventional valve. The ear-mounted features can extend into these grooves for circumferential positioning.

[0029] The end wall of the docking end has a positioning part that can dock with the delivery device of the cardiac interventional valve.

[0030] In at least one embodiment, the transfer device further includes a conveyor.

[0031] The end of the delivery device has a mating part that mates with the positioning part, and a top ring that can connect to the lug of the interventional cardiac valve.

[0032] When the positioning part mates with the mating part, the top ring and the ear positioning groove are aligned in the circumferential direction.

[0033] The transfer device according to this application is simple to operate and can provide very simple and accurate valve transfer. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of a cardiac interventional valve transfer device according to one embodiment of this application.

[0035] Figure 2 yes Figure 1 A sectional view.

[0036] Figure 3 yes Figure 1 A schematic diagram of its breakdown.

[0037] Figure 4 and Figure 5 yes Figure 1 A schematic diagram of the decomposition of the middle part of the structure.

[0038] Figure 6 This is a cross-sectional view of a partial structure of a cardiac interventional valve storage device according to one embodiment of this application.

[0039] Figure 7 This is an exploded schematic diagram of the compression body and compression base of a storage device for a cardiac interventional valve according to one embodiment of this application.

[0040] Figure 8 This is a schematic diagram of the structure of a cardiac interventional valve storage device according to one embodiment of this application.

[0041] Figure 9 This is a cross-sectional view of a cardiac interventional valve storage device according to one embodiment of the present application in the case of a pre-installed valve.

[0042] Figure 10 yes Figure 9 A schematic diagram of the compression base being pushed to the second position.

[0043] Figure 11 This is a schematic diagram of a storage device for a cardiac interventional valve according to one embodiment of this application, where a push rod is inserted.

[0044] Figure 12 yes Figure 11 A schematic diagram of the push rod in the diagram.

[0045] Figure 13 and Figure 14 This is a cross-sectional schematic diagram of the docking process between the sheath inserter and the compression body of a cardiac interventional valve transfer device according to one embodiment of this application.

[0046] Figure 15 This is a schematic diagram of the sheath inserter of a cardiac interventional valve transfer device according to one embodiment of this application.

[0047] Figure 16 yes Figure 15 A sectional view.

[0048] Figures 17 to 19 This is a schematic diagram of the process of transferring a valve from a storage device to a sheath inserter using a cardiac interventional valve transfer device according to one embodiment of this application.

[0049] Explanation of reference numerals in the attached figures:

[0050] 10 Compression body; 11 Outer clamping arm; 110 Ring mating part; 12 Outlet cylinder part; 12g First gap; 120 Inner clamping arm; 121 Pipe mating part; 13 First snap-fit ​​mating part; 14 Second snap-fit ​​mating part; 15 Slide groove;

[0051] 20 Compression base; 21 Base body; 22 Clip;

[0052] 30 Sheath feeder; 31 First section; 311 First section large area; 312 First section small area; 313 First step surface; 32 Second section; 33 Third section; 34 Slot; 35 Hook;

[0053] 40. Retaining ring; 41. Ring mating part;

[0054] 50 Slide tube; 51 Tube mating section;

[0055] 60 Push rod; 60a Connecting end; 61 Gap; 62 Leaflet; 63 Lug positioning groove; 64 Positioning part; 65 Tapered hole; 66 Limiting part; 70 Guide tube. Detailed Implementation

[0056] Exemplary embodiments of this application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are for teaching those skilled in the art how to implement this application only, and are not intended to exhaustively describe all possible methods of this application, nor to limit the scope of this application.

[0057] Reference Figures 1 to 19 This application introduces a cardiac interventional valve transfer device according to one embodiment of the present application. The transfer device includes components such as a storage device, a tubular sheath inserter 30, a push rod 60, and a delivery device. The structure of each component is described in detail below.

[0058] Unless otherwise specified, refer to Figure 1 The axial, radial, and circumferential directions referred to below are all with reference to the axial, radial, and circumferential directions of the compression body.

[0059] Reference Figures 1 to 4The cardiac interventional valve storage device (hereinafter referred to as the storage device) according to this embodiment includes a compression body 10, a compression base 20, a fixing ring 40, and a sliding tube 50. The cardiac interventional valve transfer device (hereinafter referred to as the transfer device) according to this embodiment includes the above-mentioned storage device, as well as a sheath inserter 30 and a push rod 60, or may further include a delivery device and a guide tube 70.

[0060] The storage device according to this embodiment has both valve storage and transfer functions. Before surgery, the valve can be pre-stored in the storage device, for example, by loading the valve into the storage device in a sterile manufacturing facility. During surgery, the special structure of the storage device allows the valve to be easily and gradually removed and transferred to the guide tube 70 via the sheath inserter 30.

[0061] Next, first refer to Figures 1 to 10 This section introduces the specific structure and usage of the storage device.

[0062] The compression body 10 is tubular, with one end larger than the other. The valve F can be preloaded by entering the lumen of the compression body 10 through the larger end. The smaller end of the compression body 10 provides an outlet for the compression and transfer of the valve F during the operation.

[0063] Reference Figure 7 A groove 15 extending axially is formed on the wall of the compression body 10. Axially, one end of the groove 15 is closed, near the small end of the compression body 10, and the groove 15 extends from the closed end to the large end of the compression body 10, forming an open opening at the large end. The groove 15 provides motion guidance, or rather, movement limitation, for the compression base 20.

[0064] The compression base 20 is disposed at the large end of the compression body 10 to fix and / or push the valve F. The compression base 20 includes a base body 21 and a latch 22.

[0065] The base body 21 extends into the inner cavity of the compression body 10 and abuts against the valve F. Optionally, the base body 21 and the compression body 10 form a clearance fit or a transition fit. Optionally, the outer peripheral surface of the end of the base body 21 facing the small end of the compression body 10 is generally conical, so that the compression base 20 will not interfere with the inner wall of the small end of the compression body 10 during subsequent movements.

[0066] The latch 22 is connected to the outer periphery of the base body 21 and extends through the slide groove 15 to the outside of the compression body 10. Preferably, in the circumferential direction of the compression body 10, the root of the latch 22, which is accommodated in the slide groove 15, is adapted to the slide groove 15, so that the slide groove 15 limits the latch 22, allowing the compression base 20 to only move axially along the slide groove 15.

[0067] The outer peripheral wall of the compression body 10 is also formed with a first locking part 13 and a second locking part 14 that are spaced apart in the axial direction. The tail of the latch 22 has a hook-shaped structure, which can engage with the first locking part 13 or the second locking part 14, thereby limiting the axial position of the compression base 20 on the compression body 10.

[0068] For example, refer to Figure 9 In this state, the latch 22 engages with the first latching part 13, and the compression base 20 is also said to be in the first position axially of the compression body 10. This position is the pre-installation position of the valve F, and the valve F can be fixed in the inner cavity of the compression body 10 in a suitable shape.

[0069] Reference Figure 10 In this state, the latch 22 engages with the second latching part 14, and the compression base 20 is also said to be in the second position axially above the compression body 10. This position is where the valve F begins to be transferred, and the valve F extends partially out of the small end of the compression body 10 under the push of the compression base 20.

[0070] The retaining ring 40 and the sliding tube 50 facilitate radial compression and smooth transfer of valve F.

[0071] The slide tube 50 is positioned at the small end of the inner cavity of the compression body 10. The inner wall of the slide tube 50 is formed into a conical shape, and the inner diameter of the slide tube 50 is smaller closer to the small end, so that the valve F can be gradually compressed during the transfer of the valve F.

[0072] Specifically, an outlet cylinder 12 is formed at the small end of the compression body 10. The outlet cylinder 12 has four axially extending first slits 12g, and a spring-shaped inner clamping arm 120 is defined between two adjacent first slits 12g in the circumferential direction. The inner clamping arm 120 can be slightly moved in the radial direction to clamp and release the slide tube 50.

[0073] Preferably, a protruding tube mating portion 121 is formed on the radially inner side of the inner clamping arm 120. An annular groove-shaped tube mating portion 51 is formed on the outer periphery of the slide tube 50. When the slide tube 50 is installed in the outlet cylinder 12, the tube mating portion 121 extends into the tube mating portion 51, or in other words, the tube mating portion 121 and the tube mating portion 51 are fitted together in a form-locking manner, so that the slide tube 50 is axially limited relative to the outlet cylinder 12.

[0074] The retaining ring 40 is fitted around the outer periphery of the outlet cylinder 12 to prevent the inner clamping arm 120 from elastically deforming radially outward. Specifically, the small end of the compression body 10 also forms two cantilevered outer clamping arms 11 around the outer periphery of the outlet cylinder 12. When the retaining ring 40 is fitted around the outer periphery of the outlet cylinder 12, the outer clamping arms 11 can encircle the retaining ring 40 to achieve positioning of the retaining ring 40. Optionally, the inner diameter of the retaining ring 40 is equal to or slightly smaller than the outer diameter of the outlet cylinder 12; the outer diameter of the retaining ring 40 is equal to or slightly larger than the inner diameter of the area defined by the outer clamping arms 11.

[0075] In this embodiment, the outer periphery of the fixing ring 40 is formed into a toothed annular mating portion 41, and the inner peripheral wall of the outer clamping arm 11 is formed into a recessed annular fitting portion 110. When the fixing ring 40 is sleeved on the outlet cylinder portion 12, the mating portion 41 extends into the fitting portion 110, or in other words, the mating portion 41 and the fitting portion 110 are fitted together in a form-locking manner, so that the fixing ring 40 is axially limited relative to the outlet cylinder portion 12 or the outer clamping arm 11.

[0076] The engagement of the retaining ring 40 and the outer clamping arm 11 forms a locking device for the slide tube 50. When the outer clamping arm 11 holds the retaining ring 40, the locking device locks, and the slide tube 50 is fixed at the small end of the inner cavity of the compression body 10. When the retaining ring 40 is released from the clamping of the outer clamping arm 11, the locking device is released, and the slide tube 50 can be compressed by the inner clamping arm 120 under axial force to deform and open outward. Then the slide tube 50 can leave the inner cavity of the compression body 10 from the small end, facilitating the subsequent transfer of the valve F.

[0077] By now, the reader can understand how the storage device pre-stores valve F, and how, when valve F needs to be transferred, pushing or pressing the compression base 20 causes valve F to gradually emerge from the compression body 10 from its small end in a radially contracting manner. During this gradual emergence of valve F, the slide tube 50 is locked at the outlet of the small end, thus assisting in the contraction of valve F.

[0078] Next, the transfer device according to this application and its transfer process to valve F will be described.

[0079] After the compression main body 10 is exposed at one end of the valve F, the valve F can be connected to the delivery device by means of the push rod 60.

[0080] The delivery device is not shown in the figure. It can be understood that the delivery device has a delivery guide wire and a top ring at the end, which can connect to a lug (not shown in the figure) located at valve F. The connection structure between the delivery device and valve F is prior art; for example, reference can be made to the inventor's prior utility model application CN213641419U. The entire contents of that utility model are incorporated herein by reference, and the relevant structure will not be described in detail here.

[0081] The push rod 60 provides guidance for the process of connecting the lug of valve F to the top ring of the delivery system.

[0082] Reference Figure 11 and Figure 13 One end of the push rod 60 is formed as a docking end 60a, which is used to dock with the end of the conveyor. The docking end 60a has a hollow structure, and the tip of the conveyor can extend into the docking end 60a.

[0083] To prevent the tip of the conveyor from accidentally dislodging after entering the push rod 60, the inner cavity of the mating end 60a is formed as a tapered hole 65, with the diameter of the tapered hole 65 decreasing towards the end. The inner diameter of the tapered hole 65 at its maximum diameter is larger than the outer diameter of the conveyor tip, while the inner diameter of the tapered hole 65 at its minimum diameter is smaller than the outer diameter of the conveyor tip.

[0084] To facilitate the entry of the conveyor tip into the inner cavity of the push rod 60, the mating end 60a is formed as a forked structure. In this embodiment, the mating end 60a includes three leaflets 62, with gaps 61 formed between adjacent leaflets 62. Thus, the tip of the conveyor can open the conical hole 65 by squeezing the leaflets 62 radially outward. After the tip has fully entered the inner cavity of the push rod 60, the leaflets 62 return to their original position, retracting the tip into the inner cavity of the push rod 60.

[0085] An annular flange-shaped limiting part 66 is formed in the axial central region of the push rod 60. During the process of the push rod 60 extending into the compression body 10 and the mating end 60a extending out from the small end of the compression body 10, the limiting part 66 will abut against the part of the compression base seat 20 inside the compression body 10 to indicate to the operator that the push rod 60 has been inserted into place. In this state, the blade 62 is fully extended out of the compression body 10.

[0086] The outer peripheral wall of the push rod 60 has a plurality of (three in this embodiment) axially extending lug positioning grooves 63 formed at the docking end 60a. The circumferential width of the lug positioning grooves 63 is adapted to the width of the lug of the valve F, so that the lug of the valve F can be precisely accommodated in the lug positioning grooves 63. The push rod 60 has a plurality of (three in this embodiment) axially protruding positioning portions 64 formed on the end wall located at the docking end 60a.

[0087] Although not shown in the figure, it can be understood that the end of the conveyor has a mating part that engages with the positioning part 64. When the positioning part 64 engages with the mating part, the lug positioning groove 63 is aligned circumferentially with the top ring located at the end of the conveyor. In this case, after pushing the lug of the valve F into the lug positioning groove 63, continuing to push the valve F axially will allow the lug to smoothly enter the top ring at the end of the conveyor for engagement.

[0088] For detailed usage instructions, please refer to [link / reference]. Figure 11 (Valve F and delivery device are not shown in the figure). After the lug end of valve F extends out from the small end of compression body 10, push rod 60 is passed through compression body 10 so that docking end 60a also extends out from the small end of compression body 10.

[0089] Next, insert the tip of the delivery device into the inner cavity of the push rod 60. Adjust the relative position between the valve F and the push rod 60 so that the lug of the valve F enters the lug positioning groove 63. And align the positioning part 64 with the mating part at the end of the delivery device.

[0090] Then, the compression body 10 is displaced relative to the push rod 60 in the axial direction towards the docking part 60a, causing the lug of the valve F to slide into the top ring at the end of the conveyor, and the valve F completes the loading with the conveyor.

[0091] After this, the valve F needs to be further contracted and inserted into the guide tube 70 using the sheath inserter 30. The sheath inserter 30 has a large-diameter section and a small-diameter section. The valve F will first enter the large-diameter section and then be gradually pulled into the small-diameter section to achieve radial contraction. The transfer device according to this application cleverly utilizes the connection structure between the sheath inserter 30 and the compression body 10 to realize the transfer of the slide tube 50 into the sheath inserter 30 following the movement of the valve F.

[0092] Next, refer to Figures 13 to 19 This section introduces the specific structure of the sheath feeder 30 and its usage.

[0093] The sheath insert 30 is a tubular device with varying diameters, comprising a first section 31, a second section 32, and a third section 33. The first section 31 has the largest inner diameter, followed by the second section 32, and the third section 33 has the smallest inner diameter. A second stepped surface 36 is defined between the second section 32 and the third section 33.

[0094] The first section 31 is used to fit onto the outer periphery of the small end of the compression body 10. The maximum inner diameter of the first section 31 is not less than the outer diameter of the outlet cylinder 12, and the minimum outer diameter of the first section 31 is not greater than the minimum inner diameter of the inscribed circle of the inner clamping arm 11.

[0095] The second section 32 is a transition zone, corresponding to the large-diameter section described above, used to facilitate the smooth transfer of valve F from the compression body 10 to the insulator 30. The outer diameter of the second section 32 is not less than the outer diameter of the sliding tube 50.

[0096] The third segment, 33, is the small diameter segment, used to further constrict valve F.

[0097] The first section 31 also includes a large section 311 and a small section 312. The inner diameter of the large section 311 is larger than the inner diameter of the small section 312, and a first stepped surface 313 is formed between the large section 311 and the small section 312. The inner diameter of the large section 311 is not less than the outer diameter of the fixing ring 40, and the inner diameter of the small section 312 is smaller than the outer diameter of the fixing ring 40. Therefore, during the process of the first section 31 being fitted onto the small end of the compression body 10, the first stepped surface 313 will axially compress the fixing ring 40, causing the fixing ring 40 to break free from the restraint of the outer clamping arm 11. Once the fixing ring 40 breaks free from the restraint of the outer clamping arm 11, it means that the locking of the slide tube 50 is released.

[0098] Optionally, a notch 34 is formed in the peripheral wall of the first section 31, the notch 34 being able to accommodate the outer clamping arm 11. A hook 35 is formed at the bottom of the notch 34, the hook 35 being able to engage with the end of the outer clamping arm 11. (Refer to...) Figure 14 After the retaining ring 40 is pushed away from the outer clamping arm 11 by the sheath inserter 30, the sheath inserter 30 is pushed to the bottom, and the hook 35 can be just caught by the end of the outer clamping arm 11, thus realizing a firm connection between the sheath inserter 30 and the compression body 10.

[0099] After that, refer to Figures 17 to 19 If the delivery device (not shown in the figure) connected to valve F is further dragged, valve F will first drag the slide tube 50 away from the outlet cylinder 12. This is because the uncontracted portion of valve F will exert an axial force on the slide tube 50, causing the slide tube 50 to tend to move in the direction of the second step surface 36 of the inlet sheath 30. During this process, the inner clamp arm 120 will be subjected to pressure toward the radially outward. Since the inner diameter of the first section 31 is slightly larger than the outer diameter of the outlet cylinder 12, the stressed inner clamp arm 120 will undergo elastic deformation toward the radially outward, thereby releasing the slide tube 50. The released slide tube 50 will eventually abut against the second step surface 36 as valve F moves.

[0100] During this process, the slide tube 50 moves away from the outlet cylinder 12, releasing the radial space of the outlet cylinder 12, making the process of the valve F entering the sheath 30 smoother. In addition, the slide tube 50, which abuts against the second step surface 36, can also play a secondary guiding role at that point, providing guidance for the contraction of the valve F in the third section 33.

[0101] Then, by further dragging the delivery device connected to valve F, valve F can be further contracted within the third segment 33 and finally brought into the guide tube 70.

[0102] It should be understood that the above-described embodiments and some aspects or features thereof can be appropriately combined.

[0103] This application has at least one of the following advantages:

[0104] (i) The storage device according to this application can both pre-install the valve and serve as part of the transfer device during the transfer of the valve.

[0105] (ii) In the event that the valve needs to be transferred, the storage device can be moved from the first position to the second position by a very simple operation, so that the valve is partially extended.

[0106] (iii) The ingenious combination of the fixing ring and the sliding tube makes the transfer of the valve simple and smooth. The sliding tube can guide the valve when it first extends out of the compression body, and can also enter the sheath when the sheath docks with the compression body; it can open the channel at the outlet of the compression body at the appropriate time, and can also be reused inside the sheath.

[0107] (iv) The lug positioning groove and positioning part located on the push rod can realize the automatic alignment of the valve and the top ring of the conveyor, so that the valve and the conveyor are loaded accurately and conveniently.

[0108] Of course, this application is not limited to the above-described embodiments. Those skilled in the art, under the guidance of this application, can make various modifications to the above-described embodiments without departing from the scope of this application. For example:

[0109] (i) This application does not limit the number of the outer clamping arm 11, the inner clamping arm 120, and the leaf 62.

[0110] (ii) This application does not limit the specific shape of all positioning or limiting components. For example, the ring mating part 41 may be a recessed ring structure, and the corresponding ring mating part 110 may be a protruding structure.

Claims

1. A cardiac interventional valve transfer device, characterized in that, include: The compression body (10) is tubular and has a small end and a large end in the axial direction. The inner cavity is used to store the cardiac interventional valve (F). The compression base (20) is capable of extending at least partially into the cavity of the compression body (10) and sliding in the axial direction, and the compression base (20) is capable of partially pushing the cardiac interventional valve (F) out from the small end; as well as The slide tube (50) is tubular and has a tapered inner cavity. When locked by the locking device, it can be fixed at the small end of the inner cavity of the compression body (10), and when the locking device is unlocked, it can leave the inner cavity of the compression body (10) from the small end. A tubular sheath inserter (30) is capable of engaging with the small end of the compression body (10). During the engagement process, the sheath inserter (30) can release the locking device from fixing the slide tube (50). After the locking device is released, the slide tube (50) moves from the compression body (10) to the inner cavity of the sheath (30) under the drive of the cardiac interventional valve (F), and provides guidance for the contraction of the cardiac interventional valve (F) within the sheath (30). The compression body (10) includes an outlet cylinder (12) located at the small end, the outlet cylinder (12) having at least two first slits (12g) extending in the axial direction, and an inner clamping arm (120) being formed between the two first slits (12g). The inner clamping arm (120) can apply a radially inward force to the slide tube (50) to clamp the slide tube (50), or The inner clamping arm (120) can be opened radially outward to release the slide tube (50).

2. The cardiac interventional valve transfer device according to claim 1, characterized in that, A tube mating part (121) is formed on the inner peripheral wall of the inner clamping arm (120), and a tube matching part (51) is formed on the outer peripheral wall of the sliding tube (50). The tube mating part (121) and the tube matching part (51) are shaped to fit together.

3. The cardiac interventional valve transfer device according to claim 1, characterized in that, The locking device further includes a retaining ring (40) which can be fitted around the outer periphery of the outlet cylinder (12) to restrict the inner clamping arm (120) from being pushed outward in a radial direction.

4. The cardiac interventional valve transfer device according to claim 3, characterized in that, The compression body (10) also includes at least two outer clamping arms (11) located on the outer periphery of the outlet cylinder (12). When the fixing ring (40) is sleeved on the outer periphery of the outlet cylinder (12), the fixing ring (40) is located on the inner periphery of the outer clamping arms (11) and clamped by the outer clamping arms (11). During the process of the sheath inserter (30) docking with the small end of the compression body (10), the sheath inserter (30) axially presses the fixing ring (40), causing the fixing ring (40) to disengage from the outer clamping arm (11), and the locking device is released.

5. The cardiac interventional valve transfer device according to claim 4, characterized in that, A ring fitting portion (110) is formed on the inner peripheral wall of the outer clamping arm (11), and a ring mating portion (41) is formed on the outer peripheral wall of the fixing ring (40). The ring fitting portion (110) and the ring mating portion (41) are shaped to fit together.

6. The cardiac interventional valve transfer device according to claim 3, characterized in that, The sheath feeder (30) includes a first section (31), a second section (32), and a third section (33), wherein the inner diameter of the first section (31) is larger than the inner diameter of the second section (32), and the inner diameter of the second section (32) is larger than the inner diameter of the third section (33). The first segment (31) includes a first segment large area (311) and a first segment small area (312). The inner diameter of the first segment large area (311) is larger than the inner diameter of the first segment small area (312). The inner diameter of the first segment large area (311) is not less than the outer diameter of the fixed ring (40). The inner diameter of the first segment small area (312) is smaller than the outer diameter of the fixed ring (40). A first step surface (313) is formed between the first segment large area (311) and the first segment small area (312). During the process of the first section (311) being fitted onto the small end of the compression body (10), the first step surface (313) presses the fixing ring (40) in the circumferential direction, causing the fixing ring (40) to disengage from the outer clamping arm (11).

7. The cardiac interventional valve transfer device according to claim 1, characterized in that, A second step surface (36) is formed between the second section (32) and the third section (33); the inner diameter of the second section (32) is equal to the outer diameter of the slide tube (50), and the minimum inner diameter of the slide tube (50) is not greater than the inner diameter of the third section (33); After the slide tube (50) moves into the inner cavity of the sheath (30), it abuts against the second step surface (36) under the action of the cardiac interventional valve (F), guiding the cardiac interventional valve (F) to contract to the third segment (33).

8. The cardiac interventional valve transfer device according to claim 1, characterized in that, The transfer device further includes a push rod (60), one axial end of which is formed as a mating end (60a), the outer diameter of which is smaller than the inner diameter of the slide tube (50). The push rod (60) is partially recessed on the peripheral wall at the docking end (60a) to form multiple ear-mounted positioning grooves (63). The number and position of the ear-mounted positioning grooves (63) are adapted to the ear of the cardiac interventional valve (F). The ear can extend into the ear-mounted positioning grooves (63) and be positioned in the circumferential direction. The end wall of the docking end (60a) is provided with a positioning part (64) that can dock with the delivery device of the cardiac interventional valve.

9. The cardiac interventional valve transfer device according to claim 8, characterized in that, The transfer device also includes a conveyor. The end of the delivery device has a mating part that mates with the positioning part (64), and a top ring that can connect to the lug of the interventional cardiac valve (F). When the positioning part (64) mates with the mating part, the top ring and the ear-mounted positioning groove (63) are aligned in the circumferential direction.

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