tricuspid valve delivery device

Abstract

The present invention belongs to the technical field of medical devices, and specifically relates to a tricuspid valve conveyor. A tricuspid valve conveyor includes a bending adjustment structure, which includes: a bending adjustment tube, which can be bent; and a bending adjustment handle, which is connected to the bending adjustment tube and controls the curvature of the bending adjustment tube. The bending adjustment handle includes a rotating part, a main rod, a pull wire fixing part, an internal moving part and at least one bending adjustment pull wire. In the bending adjustment structure of the present invention, the original pull wire fixing ring adopts a split design, that is, it is split into a pull wire fixing part and an internal moving part. The pull wire fixing part can move toward the distal end by itself, leaving space for the movement of the bending adjustment pull wire. The bending adjustment tube can achieve the purpose of self-straightening, and also prevents the distal end of the bending adjustment tube from being manually forced to straighten.

Description

[0001] This application claims priority to Chinese patent application No. 2021113240164, filed on November 10, 2021. This application incorporates the entirety of the aforementioned Chinese patent application. Technical Field

[0002] The present invention belongs to the technical field of medical devices, and in particular relates to a tricuspid valve delivery device. Background Art

[0003] The tricuspid valve is located between the right atrium and right ventricle in the human body. Its three leaflets are connected to the chordae tendineae inside the ventricle, and its function is to prevent blood from the right ventricle from flowing back into the right atrium. Specifically, the tricuspid valve acts as a "one-way valve," ensuring that blood circulates from the right atrium to the right ventricle and at a certain flow rate. When the right ventricle contracts, the heart squeezes the blood in the chamber, and the blood impacts the valve. The tricuspid valve closes, and blood does not flow into the right atrium. However, when the tricuspid valve structure or the heart is damaged, tricuspid regurgitation can occur.

[0004] Currently, tricuspid regurgitation treatment options primarily include open-chest surgery and minimally invasive medical procedures. However, many patients are reluctant to undergo open-chest surgery due to its significant surgical trauma, high risk, and the long and expensive postoperative rehabilitation required. Transfemoral transcatheter aortic valve surgery, a minimally invasive medical procedure, offers a new treatment option with less trauma, fewer complications, and a faster postoperative recovery.

[0005] During valve treatment, a tricuspid transfemoral valve repair device is required. The transfemoral valve repair device clamps the valve leaflets through its clamping structure, and the transfemoral valve repair device requires a conveyor that cooperates with it to convey it, control its shape and release it. For example, in the conveyor, the bending tube is bent by the bending structure, or the expansion sheath is bent by the expansion structure, so that the delivery tube inside it is bent, so as to achieve the purpose of delivering the tricuspid transfemoral valve repair device to the target position. In the original bending structure or expansion structure, when any one of the bending tubes or the expansion sheath is bent or straightened, the other tube cannot be automatically bent or straightened, affecting the normal operation of the pull wire. Therefore, there is a need for a conveyor for a tricuspid transfemoral valve repair device whose bending tube or expansion sheath can follow the automatic bending or straightening. Summary of the Invention

[0006] The present invention addresses the technical problem of the lack of a conveyor with a bending adjustment tube or an expansion sheath that can automatically bend or straighten during tricuspid valve treatment, and aims to provide a tricuspid valve conveyor.

[0007] A tricuspid valve delivery device includes a bending adjustment structure, wherein the bending adjustment structure includes:

[0008] One-adjust elbow, can be bent;

[0009] A bending handle is connected to the bending pipe to control the bending degree of the bending pipe.

[0010] The bending handle comprises:

[0011] A rotating member, with open proximal and distal ends, a hollow interior, an inner wall provided with an internal thread of the rotating member capable of driving a bending adjustment wire, and an outer wall of one end provided with a bending adjustment knob;

[0012] A main rod is arranged in the rotating member, with an open structure at the far end and a hollow interior.

[0013] a wire fixing member, which is an annular structure, is located inside the rotating member, is sleeved outside the main rod and can move axially along the main rod, and a wire fixing end is provided on the wire fixing member;

[0014] An inner moving member, an annular structure, is located inside the rotating member, is sleeved on the outside of the main rod on the distal side of the pull wire fixing member and can move axially along the main rod, and is provided with an inner moving member external thread on the outer surface, the inner moving member external thread is threadedly connected to the rotating member internal thread, and a pull wire transition hole is axially provided on the side wall to connect the distal end and the proximal end;

[0015] At least one bending adjustment wire, one end of which is connected to the bending adjustment pipe, and the other end of which is connected to the fixed end of the wire after passing through the bending adjustment pipe, the rotating member, the main rod and the wire transition hole in sequence;

[0016] When the bending adjustment knob is turned to drive the rotating part to rotate, the inner moving part moves axially along the main rod. When the inner moving part moves toward the proximal end, it drives the pull wire fixing part to move toward the proximal end, and then drives the bending adjustment pull wire on the pull wire fixing end to move to adjust the curvature of the bending adjustment tube. When the inner moving part moves toward the distal end, since the distal end of the bending adjustment tube is elastic, the pull wire fixing part automatically moves toward the distal end when it is at a distance from the inner moving part to adjust the curvature of the bending adjustment tube.

[0017] As a preferred solution, the pull wire fixed end includes:

[0018] a wire fixing hole, provided on the outer wall of the wire fixing member, with its axial direction parallel to the axial direction of the rotating member;

[0019] A wire fixing rod is inserted into the wire fixing hole for winding the bending wire.

[0020] As a preferred solution, avoidance grooves are respectively provided on the inner moving part at the distal side and the proximal side of the pull wire transition hole.

[0021] As a preferred solution, a glue injection groove is provided on the outer wall of the main rod.

[0022] As a preferred solution, a bending and anti-rotation strip or a bending and anti-rotation groove is axially provided on the outer wall of the main rod;

[0023] Bending and anti-rotation grooves or bending and anti-rotation strips are correspondingly provided on the inner walls of the wire fixing member and the inner moving member.

[0024] As a preferred solution, the outer wall of the rotating member is provided with an external rotating member thread;

[0025] The bending handle also includes:

[0026] A bending adjustment housing, which can accommodate the rotating member, has the bending adjustment knob extending from the proximal end or the distal end, and a housing slide groove provided on the side wall, and the housing slide groove is provided along the axial direction of the rotating member;

[0027] A bending limit device includes a limit block, a plurality of groups of spiral push blocks are arranged on the inner side of the limit block, the spiral push blocks are engaged with the external threads of the rotating part, and the outer side of the limit block is slidably installed on the housing slide groove.

[0028] As a preferred solution, the spiral push block is a long strip push block, or the middle part of the spiral push block is a concave structure, so that the spiral push block consists of two protruding blocks.

[0029] As a preferred solution, a bending adjustment mark is provided on the outer surface of the limit block, and the bending adjustment mark can be one or a combination of a protrusion, a groove or a colored mark.

[0030] As a preferred solution, a transparent outer cover is provided on the bending adjustment shell, and the outer cover sealing cover is provided on the outside of the shell sliding groove.

[0031] As a preferred solution, the expansion structure adopts the same structure as the bending adjustment structure.

[0032] A method for assembling a wire control device, comprising:

[0033] Fix the distal end of the inner tube to the inside of the delivery housing through an internal clamp, insert the outer tube into the delivery housing from the proximal end of the delivery housing, adjust the inclination of the inner tube, and sleeve the outer tube from the proximal end of the inner tube;

[0034] The distal end of the inner tube is fixed inside the delivery housing so that the inner tube is fixed. The positive improvement effect of the present invention is that the tricuspid valve delivery device of the present invention has the following advantages:

[0035] 1. In the bending adjustment structure, the original pull wire fixing ring adopts a split design, that is, it is split into a pull wire fixing part and an inner moving part. The pull wire fixing part can move by itself, leaving space for the movement of the bending adjustment wire or the expansion wire. The bending adjustment tube or the expansion sheath can achieve the purpose of self-straightening, and also prevents the distal end of the bending adjustment tube or the expansion sheath from being forced to straighten manually.

[0036] 2. The design that the axis direction of the wire fixing hole is parallel to the axis direction of the rotating part can avoid the problem that the rotating part cannot rotate normally due to interference between the end of the wire fixing rod and the internal thread of the rotating part.

[0037] 3. The avoidance groove can prevent the inner moving part from squeezing and bending the wire when it is close to the wire fixing part.

[0038] 4. A glue injection hole is set on the side of the main rod to solve the problem of adhesive overflow and device contamination when the tube / sheath needs to be coated with adhesive before being assembled with the main rod.

[0039] 5. The length of the housing slide groove can determine the position of the proximal and distal ends of the limit block, thereby limiting the rotation limit of the rotating part and further controlling the stroke of the bending wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] FIG1( a ) is an exploded view of the delivery structure and release structure of the present invention;

[0041] FIG1( b ) is a schematic diagram of FIG1( a ) from another angle;

[0042] FIG1( c ) is a schematic diagram of the overall structure of the delivery structure and the release structure of the present invention;

[0043] FIG2( a ) is a schematic diagram of a portion of the structure of the conveying structure of the present invention;

[0044] Figure 2(b) is an exploded view of the structure of Figure 2(a);

[0045] Figure 3 This is an exploded view of the structure of the rotary control device of the present invention;

[0046] FIG4( a ) is an exploded view of a portion of the release structure of the present invention;

[0047] Figure 4(b) is a cross-sectional view of Figure 4(a);

[0048] FIG4( c ) is a schematic structural diagram of the rotating sleeve in FIG4( a );

[0049] FIG4( d ) is an exploded view of the connection between the core rod and the core rod fixing member of the present invention;

[0050] FIG5( a ) is a schematic diagram showing a connection between a bending adjustment structure, a loader structure and an expansion structure according to the present invention;

[0051] FIG5( b ) is a schematic diagram of an application of FIG5( a );

[0052] FIG5( c ) is a schematic diagram of the structure of FIG5( a ) after removing the housing and the rotating member;

[0053] FIG6( a ) is an exploded view of the bending adjustment structure of the present invention excluding the bending adjustment shell;

[0054] Figure 6(b) is an exploded view of a portion of the structure of Figure 6(a);

[0055] FIG6( c ) is an exploded view of a portion of the structure of the bending handle of the present invention;

[0056] Figure 7 A schematic structural diagram of a wire fixing member of the present invention;

[0057] FIG8( a ) is a schematic structural diagram of a limit block of the present invention;

[0058] FIG8( b ) is another schematic structural diagram of the limit block of the present invention. DETAILED DESCRIPTION

[0059] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0060] In the present invention, when describing a tricuspid valve delivery device, "distal end," "proximal end," "distal section," and "proximal section" are used as directional terms. These directional terms are commonly used in the field of interventional medical devices. "Distal end" and "distal section" refer to the end or section away from the operator during surgery, while "proximal end" and "proximal section" refer to the end or section closer to the operator during surgery. "Axial" refers to the direction parallel to the line connecting the distal and proximal centers of the medical device; "radial" refers to the direction perpendicular to the aforementioned "axial" direction.

[0061] 1(a), 1(b) and 5(a), the tricuspid valve delivery device of the present invention includes, from the proximal end to the distal end, a release structure 100, a delivery structure 200, a bending adjustment structure 300 of the present invention, a loader structure 400 and an expansion structure 500 of the present invention.

[0062] The delivery structure 200 comprises a delivery tube 210, and the bending adjustment structure 300 comprises a bending adjustment tube 310 with adjustable curvature. The delivery tube 210 passes through the bending adjustment tube 310 and extends out of the bending adjustment tube 310, where it is detachably connected to the tricuspid transfemoral valve repair device. The delivery structure 200 is used to deliver the tricuspid transfemoral valve repair device to a target location. The loader structure 400 is used to load the tricuspid transfemoral valve repair device and pass the bending adjustment tube 310 through it. The expansion structure 500 comprises an expansion sheath 510 with adjustable curvature, which allows the bending adjustment tube 310 to pass through it.

[0063] In some embodiments, reference Figure 1(a) to Figure 2(b) The delivery structure 200 further includes a delivery handle 220, which includes a delivery shell and a pull-wire control device.

[0064] The distal end of the delivery housing is connected to the proximal end of the delivery tube 210. A delivery end cap 2211 is preferably detachably provided at the distal end of the delivery housing. The delivery housing is preferably composed of a delivery upper shell 221a and a delivery lower shell 221b connected together.

[0065] The pull wire control device can slide on the delivery shell along the axial direction of the delivery tube 210. Preferably, the number of pull wire control devices is the same as the number of clips of the tricuspid transfemoral valve repairer. Each pull wire control device is connected to a corresponding clip, and the pull wire control device is used to control the opening and closing of the clip.

[0066] The pull wire control device includes an inner tube 222, an outer tube 223 and a delivery pull wire. The distal end of the inner tube 222 is fixed inside the delivery shell. Preferably, the distal end of the inner tube 222 is fixed inside the delivery upper shell 221a. The distal end of the outer tube 223 passes through the proximal end of the delivery shell and is sleeved outside the inner tube 222. Preferably, the distal end of the outer tube 223 passes through the proximal end of the delivery upper shell 221a. The proximal end of the outer tube 223 is located outside the delivery shell, and the outer tube 223 is axially slidably connected to at least the middle and proximal section of the inner tube 222, and the outer tube 223 is axially slidably connected to the proximal end of the delivery shell. The distal end of the delivery pull wire extends axially along the interior of the outer tube 223, the interior of the inner tube 222 and the interior of the delivery tube 210 in sequence and is detachably connected to the clip of the tricuspid transfemoral valve repair device. The proximal end of the delivery pull wire is connected to the proximal end of the outer tube 223. When the delivery wire needs to be retracted or extended, the outer tube 223 outside the delivery housing is driven to slide axially along the proximal end of the delivery housing and the outer wall of the inner tube 222, driving the delivery wire proximal to the outer tube 223 to follow. The sliding coordination between the outer tube 223 and the inner tube 222 allows for smoother and more reliable push-pull control of the delivery wire, and more accurate and reliable opening and closing of the clips of the tricuspid transfemoral valve repair device.

[0067] Specifically, when in use, one end of the delivery pull wire is connected to the proximal end of the outer tube 223, and the other end extends axially along the interior of the outer tube 223, the interior of the inner tube 222, and the interior of the delivery tube 210 to the tricuspid transfemoral valve repair device. After being detachably connected to the clip of the tricuspid transfemoral valve repair device, it extends back to the proximal end of the outer tube 223, causing the delivery pull wire to form a U-shaped structure. When the delivery pull wire is connected to the clip of the tricuspid transfemoral valve repair device, a pull wire through hole is provided on the clip, and the delivery pull wire can be detachably connected to the clip by passing through the pull wire through hole. When it is necessary to separate the delivery structure 200 from the tricuspid transfemoral valve repair device, the delivery pull wire is released and one end of the delivery pull wire is continuously pulled until the entire pull wire is pulled out.

[0068] In some embodiments, the proximal end of the delivery housing is provided with an external mounting hole 2212, and the outer tube 223 passes through the proximal end of the delivery housing through the external mounting hole 2212 and slides axially within the external mounting hole 2212. Preferably, referring to Figures 1(a), 1(b), and 2(b), the proximal end of the delivery upper housing 221a is provided with external mounting holes 2212, and the number of external mounting holes 2212 is the same as or not less than the number of pull-wire control devices, so that each outer tube 223 passes through the proximal end of the delivery upper housing 221a through its corresponding independent mounting hole 2212. The outer tube 223 can slide within the external mounting hole 2212 along the axial direction of the outer tube.

[0069] In some embodiments, reference Figure 1(a) to Figure 2(b) A damping ring 224 is provided at the distal end of the outer tube 223 , and the damping ring 224 is sleeved outside the inner tube 222 and fits closely with the inner tube 222 .

[0070] The damping ring 224 is typically made of an elastic material. Its tight fit with the inner tube 222 ensures that a certain amount of force is required to push the outer tube 223, creating damping. This prevents the outer tube 223 from undergoing significant displacement even with minimal force, which could affect control accuracy. The damping ring 224 also controls the positioning of the outer tube 223. Once the outer tube 223 reaches the target position and the external operating force is removed, the damping ring 224 maintains a stable position relative to the inner tube 222. Furthermore, the damping ring 224 prevents the distal end of the outer tube 223 from slipping out of the delivery housing.

[0071] In some embodiments, the outer surface of the inner tube 222 is a non-slip layer. The non-slip layer can be obtained by frosting the outer surface of the inner tube 222, making the outer surface of the inner tube 222 relatively rough or uneven, thereby increasing the damping force generated between the damping ring 224 and the inner tube 222.

[0072] In some embodiments, referring to Figures 2(a) and 2(b), the distal end of the inner tube 222 is connected to the interior of the delivery housing via an internal clamp 225. The distal end of the inner tube 222 can tilt and rock between the internal clamp 225 and the delivery housing. Preferably, the distal end of the inner tube 222 is connected to the interior of the delivery upper housing 221a via the internal clamp 225.

[0073] The present invention connects the distal end of the inner tube 222 to the conveying housing by means of an internal clamp 225, rather than directly rigidly connecting the two. This is because the machining accuracy of the conveying housing can be greatly reduced, particularly the correspondence between the external mounting hole and the fixed position of the inner tube 222. If the inner tube cannot be slightly adjusted, and the conveying housing is not machined accurately enough or internal stress deformation occurs, after the inner tube 222 and the outer tube 223 are installed, the sliding of the inner tube 222 relative to the outer tube 223 may be restricted, such as not sliding smoothly or not being able to slide. The present invention ensures that the inner tube 222 can be adjusted during assembly so that it slides smoothly with the outer tube 223 by allowing the inner tube 222 to tilt and shake relative to the fixed position. After the inner tube 222 is adjusted, a flexible method such as gluing is used at the distal end or distal end of the inner tube 222 to achieve direct rigid fixation of the distal end of the inner tube 222 to the conveying housing. That is, the inner tube 222 is now fixed at two points, thereby forming a stable state between the inner tube 222 and the outer tube 223.

[0074] Based on this, the present invention also provides an assembly method of a wire control device, comprising the following specific steps:

[0075] The distal end of the inner tube 222 is fixed to the interior of the delivery housing by means of an internal clamp 225. The outer tube 223 is inserted into the delivery housing from the outside of the proximal end of the delivery housing. The inclination of the inner tube 222 is adjusted so that the outer tube 223 is sleeved from the proximal end of the inner tube 222. The distal end of the inner tube 222 is fixed to the interior of the delivery housing so that the inner tube 222 is immovable.

[0076] Specifically, the distal end of the inner tube 222 can be fixed to the interior of the upper delivery housing 221a via the internal clamp 225, and the outer tube 223 can be inserted into the upper delivery housing 221a through the external mounting hole 2212 at the proximal end of the upper delivery housing 221a. The inclination of the inner tube 222 is adjusted, and the outer tube 223 is sleeved from the proximal end of the inner tube 222. When the outer tube 223 and the inner tube 222 maintain smooth sliding, the adjustment of the inner tube 222 is considered complete. The distal end of the inner tube 222 is fixed to the interior of the upper delivery housing 221a by gluing, so that the inner tube 222 is fixed.

[0077] In some embodiments, the internal clamp 225 can adopt a clamping mechanism in the prior art that can clamp and allow the inner tube 222 to have a certain tilt and shake. The internal clamp 225 of the present invention can also be designed as follows:

[0078] Referring to FIG2( b ), the inner clamp 225 includes a clamping base 2251 and a clamping top block 2252. The top surface of the clamping base 2251 has a lower semi-cylindrical groove. The bottom surface of the clamping top block 2252 has an upper semi-cylindrical groove. The clamping top block 2252 is connected to the top of the clamping base 2251. The upper semi-cylindrical groove and the lower semi-cylindrical groove form a cylindrical groove for accommodating the inner tube 222. The outer diameter of the cylindrical groove is slightly larger than or equal to the outer diameter of the inner tube 222. Here, the clamping degree between the clamping base 2251 and the clamping top block 2252 can be adjusted. For example, the clamping top block 2252 can be pressed against the clamping base 2251, or the clamping top block 2252 can only be in contact with the clamping base 2251. The materials of the clamping base 2251 and the clamping top block 2252 have a certain degree of elastic deformation. By applying a certain force to cause them to deform, the outer diameter of the cylindrical groove can be changed to a certain extent. As shown in FIG2(b), the clamping bases 2251 of the plurality of internal clamps 225 can be integrally formed and each have an independent lower semi-cylindrical groove. The clamping top block 2252 is detachably connected to the clamping base 2251, for example, by providing screw holes on both the clamping top block 2252 and the clamping base 2251, and the two are connected by screws.

[0079] In some embodiments, reference Figure 1(a) to Figure 2(b) The wire control device further includes a push block 226 , which is disposed at the proximal end of the outer tube 223 , and drives the outer tube 223 to slide axially.

[0080] In some embodiments, the pull-wire control device further comprises a push slide 2261, which is fixed to the proximal side of the conveying housing, and has a push chute 2262 axially arranged on the push slide 2261. Preferably, the push slide 2261 is fixed to the proximal outer wall of the conveying lower housing 221b, and the push chute 2262 can extend to the proximal end of the conveying lower housing 221b, so that a corresponding chute is also arranged on the proximal end surface of the conveying lower housing 221b.

[0081] The pushing block 226 is provided with a guide block 2263, which is slidably connected to the pushing chute 2262. When the pushing block 226 is required to move axially, the pushing chute 2262 provides a guiding effect for the pushing block 226, making the pushing process of the pushing block 226 more stable and reliable.

[0082] In some embodiments, reference Figure 1(a) to Figure 2(b) The wire control device further includes a starting block 227, which is arranged on the pushing block 226. An anti-pushing card 2271 is provided on the inner side of the starting block 227. The starting block 227 is rotatably arranged on the pushing block 226, and the two can adopt a clip-like structure.

[0083] The proximal end of the conveying shell is correspondingly provided with a card recess 2213, and the card recess 2213 is detachably engaged with the anti-push card 2271. Specifically, a card recess 2213 can be correspondingly provided on the conveying lower shell 221b. When the card recess 2213 is engaged with the anti-push card 2271, the push block 226 cannot move along the axial direction of the outer tube 223, and the length of the conveying pull line is locked. When it is necessary to pull or convey the conveying pull line, the starting block 227 is pressed to separate the card recess 2213 from the anti-push card 2271 to realize the movement of the push block, and the axial sliding push block 226 is used to pull or convey the conveying pull line. The design of the card recess 2213 abandons the original convex structure to prevent damage to the operator's hands.

[0084] In some embodiments, reference Figure 1(a) to Figure 2(b) The cable control device also includes a rotary control device 228, which is disposed at the proximal end of the outer tube 223 and is fixed to the proximal end of the conveyor cable. The conveyor cable is fixed by the rotary control device 228. The rotary control device 228 can rotate, allowing the cable control device to achieve both push-pull and rotational control, thereby increasing the control accuracy of the conveyor cable.

[0085] In some embodiments, when the pull wire control device is provided with a push block 226 , the proximal end of the outer tube 223 is fixedly mounted with the rotary control device 228 through the push block 226 , and the delivery pull wire passes through the push block 226 and is fixed to the rotary control device 228 .

[0086] In some embodiments, reference Figure 3 The rotary control device 228 includes an outer ring body 2281 and an inner ring body 2282. The outer ring body 2281 is a cylindrical structure with at least its top surface open and its interior hollow, which is used to accommodate the inner ring body 2282. The outer wall of the outer ring body 2281 is provided with an external through-hole 2283 that connects the inside and the outside. The inner ring body 2282 is rotatably arranged within the outer ring body 2281. A gap is formed between the outer wall of the inner ring body 2282 and the inner wall of the outer ring body 2281 to accommodate the transmission cable. The proximal end of the transmission cable passes through the external through-hole 2283 and is wrapped around the outer wall of the inner ring body 2282.

[0087] By rotating the inner ring 2282, the conveyor wire is wound or unwound around the outer wall of the inner ring 2282, i.e., in the gap between the inner ring 2282 and the outer ring 2281, thereby retrieving or conveying the conveyor wire. This allows the conveyor structure 200 to achieve both push-pull and rotational control, increasing the precision of the conveyor wire's control. For example, if the push-pull motion of the push block 226 is too large, the conveyor wire can be precisely controlled by slightly rotating the inner ring 2282.

[0088] In some embodiments, reference Figure 3The diameters of the inner ring 2282 at its upper and lower ends are larger than its middle diameter. The outer walls of the inner ring 2282 are in contact with the inner wall of the outer ring 2281, while the outer wall of the middle portion of the inner ring 2282 is wrapped around the conveyor wire. This design creates a gap between the middle outer wall of the inner ring 2282 and the inner wall of the outer ring 2281, while the outer walls of the inner ring 2282 at its upper and lower ends are relatively close to the inner wall of the outer ring 2281. This creates a certain damping effect when the inner ring 2282 rotates relative to the outer ring 2281. This fit is conventional, such as an interference fit or a transition fit, and will not be further described here.

[0089] In some embodiments, reference Figure 3 The inner ring body 2282 is a cylindrical structure with a hollow interior. An inner through hole 2284 is provided on the outer wall of the inner ring body 2282 to connect the inside and the outside. The proximal end of the delivery wire passes through an outer through hole 2283 and an inner through hole 2284 in sequence and then extends out from another outer through hole 2283 corresponding to the inner through hole 2284. Therefore, Figure 3 As shown, the outer ring body 2281 has two outer holes 2283, which correspond to the two ends of the inner hole 2284 passed through by the inner ring body 2282. The coordinated design of the outer hole 2283 and the inner hole 2284 forms a wire channel inside and outside the rotary control device 228, which can directly realize the large-scale pulling and adjustment of the conveying wire. Such large-scale wire adjustment often occurs before the device enters the human body, which is convenient for assembling and adjusting the conveying wire. A fixed length of the conveying wire is reserved. After the adjustment is completed, the inner ring body 2282 is rotated, and the part of the conveying wire located on both sides of the outer ring body 2281 enters between the outer ring body 2281 and the inner ring body 2282, so that the conveying wire is wrapped around the inner ring body 2282 for fixation. Generally, it can be fixed by rotating two circles or more. However, this is not a restrictive description, because the gap between the inner ring 2282 and the outer ring 2281 may be different on different devices, because the thickness of the conveying wire may also be different when facing different devices, so the number of reliable fixed circles is often different, but according to actual needs, the number of fixed circles of the conveying wire can be determined without creative labor, but generally one or more circles will be fixed, because when it is not certain whether the operator will reversely rotate the inner ring 2282, it is necessary to leave a reverse rotation margin for the fixation of the conveying wire. Of course, the general rotary control device 228 is often used for fine adjustments, so the adjustment of the inner ring 2282 is relatively small. Here, for special cases, for example: if the operator needs to rotate the inner ring 2282 in the opposite direction a lot, then a large number of extra circles can be rotated when fixing the conveying wire to ensure that the operator can reversely rotate the inner ring 2282 a lot.

[0090] In some embodiments, the inner perforation 2284 is located inside the outer perforation 2283 , so that the inner perforation 2284 is arranged corresponding to the outer perforation 2283 , so that the conveying pull line can pass through the outer perforation 2283 and the inner perforation 2284 more smoothly in sequence.

[0091] In some embodiments, reference Figure 3 The inner ring body 2282 is provided with an operating end 2285 at the upper end thereof, and the inner ring body 2282 is rotated by the operating end 2285. The operator can directly rotate the inner ring body 2282 by the operating end 2285. Figure 3 As shown in , the operating end 2285 is a wire-pulling operating handle. The operating end 2285 can also be a notch on the end face, for example, shaped to accommodate a flat-blade screwdriver. The operator can directly insert the flat-blade screwdriver into the notch to rotate the inner ring 2282. The operating end 2285 can also be a protrusion on the end face, for example, shaped to accommodate a concave Phillips screwdriver. The operator can directly insert the concave Phillips screwdriver into the protrusion to rotate the inner ring 2282, thereby facilitating operation of the inner ring 2282.

[0092] In some embodiments, reference Figure 1(a) to Figure 2(b) The distal end of the delivery handle 220 is provided with a transition piece 229, and the delivery handle 220 is connected to the proximal end of the delivery tube 210 through the transition piece 229. The transition piece 229 is provided with a plurality of threading holes 2291, and the number of threading holes 2291 is not less than the number of delivery pull wires passing through the delivery handle 220. For example, when a delivery pull wire passes through the delivery handle 220 multiple times, it is calculated according to the number of passages. The length direction of the threading hole 2291 is the axial direction of the delivery handle 220, and the threading hole 2291 connects the proximal end and the distal end of the transition piece 229. The proximal end of the delivery pull wire enters the interior of the delivery handle 220 through the threading hole 2291. The threading holes 2291 are provided on the transition piece 229, so that each delivery pull wire can enter the delivery tube 210 independently through its corresponding threading hole 2291, so that each delivery pull wire does not interfere with each other, thereby preventing the delivery pull wires from being entangled.

[0093] In some embodiments, a transition wire tube is disposed between the threading hole 2291 and the inner tube 222. The distal end of the transition wire tube is connected to the corresponding threading hole 2291, and the proximal end of the transition wire tube is connected to the corresponding inner tube 222. The threading hole 2291, the transition wire tube, and the inner tube 222 form a wire channel within the delivery handle 220. When multiple delivery wires pass through the same inner tube 222, the proximal ends of the transition wire tubes containing the delivery wires passing through the same inner tube 222 are collectively connected to the distal end of the corresponding inner tube 222. This design of the transition wire tube allows each delivery wire to independently enter the inner tube 222 through its corresponding transition wire tube, preventing interference between the delivery wires and preventing entanglement between the delivery wires.

[0094] In some embodiments, as shown in Figures 1(a), 1(b), 4(a), and 4(b), a release mechanism 100 is detachably connected to a tricuspid transfemoral valve repair device, and the release mechanism 100 can control the connection or separation of a delivery mechanism 200 from the tricuspid transfemoral valve repair device. The release mechanism 100 includes a core rod 110, a release control end 120, and a repair device control assembly.

[0095] The distal end of the core rod 110 passes through the delivery tube 210 and is detachably connected to the tricuspid transfemoral valve repair device. The proximal end of the core rod 110 is provided with a release control end 120, and the core rod 110 is connected to or separated from the tricuspid transfemoral valve repair device via the release control end 120. Preferably, the release control end 120 can be a release knob, which is fixed to the proximal end of the core rod 110. By turning the release knob, the core rod 110 is driven to rotate, thereby achieving detachable connection or separation with the tricuspid transfemoral valve repair device.

[0096] The repairer control assembly is used to control the working state of the tricuspid transfemoral valve repairer. The working states of the tricuspid transfemoral valve repairer mainly include open, umbrella and closed states, for example: the three states of the repair clamp in the Chinese patent: A valve repair clamp (publication number: CN111449805A). The tricuspid valve conveyor includes but is not limited to this type of repair clamp, which can be applied to a variety of medical devices that require wire control and delivery. It achieves the above-mentioned various states by pushing or pulling back the tricuspid transfemoral valve repairer through the core rod 110. The repairer control assembly can realize the pushing or pulling back of the core rod 110. The repairer control assembly includes a rotating sleeve 131, a threaded tube 132, a core rod fixing member 133 and a push nut 134.

[0097] The proximal and distal ends of the rotating sleeve 131 are open structures, and the interior of the rotating sleeve 131 is hollow. The rotating sleeve 131 is connected to the conveying housing. When the rotating sleeve 131 is provided on the conveying housing, it is preferably provided with multiple auxiliary guide members, such as the first guide member 1311 and the second guide member 1312 shown in Figure 4(c). The push block 226 can be supported on the rotating sleeve 131 and guided axially by the auxiliary guide members. A pin retaining groove 1314 is circumferentially provided on the outer wall of the rotating sleeve 131. As shown in Figure 4(c), the rotating sleeve 131 may also be provided with a third guide member 1313, which is used to secure the rotating sleeve 131 to the conveying housing to prevent axial movement or rotation of the rotating sleeve 131.

[0098] The proximal and distal ends of the threaded tube 132 are open structures. The interior of the threaded tube 132 is hollow. The threaded tube 132 is at least partially located inside the rotating sleeve 131. An external thread is provided on the outer wall of the threaded tube 132. The proximal end of the threaded tube 132 extends out of the rotating sleeve 131 and is detachably connected to the core rod fixing piece 133. The two can be connected by a threaded connection.

[0099] The core rod fixing member 133 is rotatably connected to the core rod 110 and drives the core rod 110 to move axially. When the threaded tube 132 drives the core rod fixing member 133 to move axially, it also drives the core rod 110 to move axially, ultimately achieving the working state of the tricuspid transfemoral valve repair device.

[0100] The proximal end of the push nut 134 is threadedly connected to the external threads of the threaded tube 132. Specifically, the proximal inner wall of the push nut 134 is preferably provided with internal threads, which are threadedly connected to the external threads of the threaded tube 132 via the internal threads. The distal end of the push nut 134 can move circumferentially along the rotating sleeve 131. Specifically, the distal end of the push nut 134 is radially provided with a pin mounting hole 1341. The push nut 134 is connected to the rotating sleeve 131 by a push pin 1342 that passes through the pin mounting hole 1341 and the pin retaining groove 1314 in sequence, thereby enabling the push nut 134 to move circumferentially along the rotating sleeve 131. As shown in Figure 4(a), four pin mounting holes 1341 are provided along the circumference of the push nut 134. The push nut 134 is rotatably connected to the rotating sleeve 131 via the four push pins 1342.

[0101] The distal end of the core rod 110 passes through the core rod fixing piece 133, the threaded tube 132 and the delivery tube 210 in sequence and is connected to the tricuspid transfemoral valve repair device. When the advancement nut 134 is rotated, since the rotating sleeve 131 is stationary, the threaded tube 132 can be extended or extended into the rotating sleeve 131 axially, driving the core rod fixing piece 133, and then driving the core rod 110 to push or pull back to the distal end to control the working state of the tricuspid transfemoral valve repair device.

[0102] In some embodiments, the core rod fixing member 133 needs to restrict the core rod 110 from axial movement relative to the threaded tube 132, while allowing rotation, so that the core rod 110 can be detachably connected to or separated from the tricuspid transfemoral valve repair device by releasing the control end 120. In other words, the core rod 110 cannot move axially independently of the core rod fixing member 133 or the threaded tube 132. Therefore, the core rod 110 and the core rod fixing member 133 of the present invention can be connected in the following manner to achieve the core rod fixing member 133 allowing the core rod 110 to rotate while restricting the core rod 110 from moving axially:

[0103] A positioning block cavity is provided within the core rod fixture 133. A positioning block 111 is provided near the core rod 110, and the positioning block 111 is rotatably confined within the cavity. This means that the positioning block 111 can rotate within the cavity, but due to the cooperation between the core rod fixture 133 and the threaded tube 132, the positioning block 111 cannot move axially outside the cavity. Consequently, the core rod 110 cannot move axially along the core rod fixture 133 or the threaded tube 132, but can rotate under the control of the release control end 120.

[0104] In some embodiments, a gasket 112 is further provided at the proximal end of the core rod, and is attached to the proximal or distal end of the positioning block 111. The axial length of the positioning block cavity of the core rod fixing member 133 is greater than the axial length of the positioning block 111, and the axial length of the positioning block cavity of the core rod fixing member 133 is less than the total axial length of the positioning block 111 and the gasket 112. The positioning block 111 cannot be too tightly pressed between the core rod fixing member 133 and the threaded tube 132, otherwise it will be difficult to rotate the core rod 110. Therefore, in order to prevent the axial shaking of the core rod 110 due to the positioning block 111 not being tightened, a gasket 112, such as a silicone gasket (ring), is provided on the distal side or proximal side of the positioning block 111. The axial length of the positioning block accommodating cavity reserved for the positioning block 111 inside the core rod fixing part 133 is slightly smaller than the total axial length of the positioning block 111 and the gasket 112, but greater than the axial length of the positioning block 111. Therefore, after the core rod fixing part 133 is fixed to the threaded tube 132, the positioning block 111 is squeezed by the gasket 112 and cannot shake axially. Under the action of the gasket 112, the positioning block 111 will not be excessively squeezed, so that the core rod 110 rotates under the action of the release control end 120.

[0105] In some embodiments, referring to FIG4( a ), a limited rotation groove 1321 is provided on the outer wall of the threaded tube 132, with the length of the limited rotation groove 1321 extending in the axial direction of the threaded tube 132. Referring to FIG4( a ) and FIG4( c ), a limited rotation block 1315 is provided on the inner wall of the rotating sleeve 131. The limited rotation block 1315 is located within and slidably connected to the limited rotation groove 1321. The combination of the limited rotation groove 1321 and the limited rotation block 1315 restricts the rotation of the threaded tube 132 within the rotating sleeve 131, thereby allowing the threaded tube 132 to move axially along the rotating sleeve 131 under the action of the push nut 134.

[0106] In some embodiments, reference Figures 5(a) to 6(c)The bending adjustment structure 300 includes a bending adjustment tube 310 and a bending adjustment handle 320. The bending adjustment tube 310 is bendable and can be passed through by the delivery tube 210. When the bending adjustment tube 310 bends, the delivery tube 210 and the core rod inside the delivery tube 210 bend together. The bending adjustment handle 320 is connected to the bending adjustment tube 310 and controls the bending degree of the bending adjustment tube 310. Referring to Figures 6(a) and 6(b), the bending adjustment handle 320 includes a rotating member 321, a main rod 322, a pull wire fixing member 323, an inner moving member 324, and at least one bending adjustment wire.

[0107] The proximal and distal ends of the rotating member 321 are open structures. The interior of the rotating member 321 is hollow. The inner wall of the rotating member 321 is provided with an internal thread of the rotating member that can drive the bending adjustment wire. The outer wall of one end of the rotating member 321 is provided with a bending adjustment knob 3211. When the bending adjustment knob 3211 is rotated, the rotating member 321 rotates accordingly.

[0108] The main rod 322 is disposed in the rotating member 321. The distal end of the main rod 322 is an open structure and the interior is hollow. Preferably, as shown in FIG6( b ), a gap 3223 is provided at the distal end of the main rod 322 for the conveying wire to pass through.

[0109] The wire fixing member 323 is an annular structure. The wire fixing member 323 is located inside the rotating member 321 . The wire fixing member 323 is sleeved outside the main rod 322 and can move axially along the main rod 322 . A wire fixing end is provided on the wire fixing member 323 .

[0110] The inner movable member 324 is an annular structure located within the rotating member 321. The inner movable member 324 is sleeved around the main rod 322 and is axially movable along the main rod 322. The inner movable member 324 is located distally to the cable fixing member 323. The outer surface of the inner movable member 324 is provided with an inner movable member external thread, which is threadably connected to the rotating member internal thread. A cable transition hole 3241 is axially provided on the sidewall of the inner movable member 324, connecting the distal and proximal ends.

[0111] The distal end of the bending adjustment wire is connected to the bending adjustment tube 310 , and the proximal end of the bending adjustment wire passes through the bending adjustment tube 310 , the rotating member 321 , the main rod 322 and the wire transition hole 3241 in sequence and is connected to the fixed end of the wire.

[0112] When the bending adjustment knob 3211 is rotated to drive the rotating part 321 to rotate, the inner moving part 324 moves axially along the main rod 322. When the inner moving part 324 moves toward the proximal end, it drives the pull wire fixing part 323 to move toward the proximal end, and then drives the bending adjustment pull wire on the pull wire fixing end to move to adjust the curvature of the bending adjustment tube 310. When the inner moving part 324 moves toward the distal end, since the distal end of the bending adjustment tube 310 is elastic, the pull wire fixing part 323 is at a distance from the inner moving part 324. The pull wire fixing part 323 automatically rebounds and straightens at the distal end of the bending adjustment tube 310, so that the pull wire fixing part 323 automatically moves toward the distal end under the drive of the bending adjustment pull wire, thereby making the bending adjustment tube 310 straighten from bending.

[0113] If the wire fixing member 323 and the inner moving member 324 are designed as an integrated structure, there will be certain defects in actual use. Therefore, the present invention designs the wire fixing member 323 and the inner moving member 324 as separate parts, and the expansion handle 520 of the expansion structure 500 preferably adopts the same structure as the bending adjustment handle 320 of the bending adjustment structure 300. The reasons for the separate design of the wire fixing member 323 and the inner moving member 324 in the present invention are as follows:

[0114] 1(a), 1(b) and 5(a), the dilation sheath in the tricuspid valve delivery device is not a single structure, but rather multiple structures that need to cooperate with each other. That is, the tricuspid valve delivery device includes, but is not limited to, the release structure 100, the delivery structure 200, the bending adjustment structure 300, the loader structure 400 and the dilation structure 500 of the present invention. The interior of the dilation sheath 510 in the dilation structure 500 passes through the bending adjustment tube 310 of the bending adjustment structure 300, and the interior of the bending adjustment tube 310 of the bending adjustment structure 300 passes through the delivery tube 210 of the delivery structure 200.

[0115] 5(b) and 5(c), when the tricuspid valve delivery device enters the human body, the operable bending adjustment structure is composed of the bending adjustment structure 300 and the expansion structure 500. Therefore, the two structures actually cooperate with each other and restrict each other. For example, when the expansion sheath 510 actively bends, the inner moving part 524 of the expansion structure 500 pushes the pull wire fixing part 523 backward to drive the expansion pull wire to make the distal end of the expansion sheath 510 bend, and at the same time it will drive the bending adjustment tube 310 to bend. However, the bending adjustment tube 310 is passively bent at this time. The bending of the distal end of the bending adjustment tube 310 will push the bending adjustment wire backward to a certain extent. Assuming that the inner movable part 324 and the wire fixing part 323 are an integrated structure, the inner movable part 324 is threadedly connected to the rotating part 321, and the inner movable part 324 is fixed by the rotating part 321 and cannot move freely. Therefore, the wire fixing part 323 cannot move either. At this time, the wire will not be able to obtain space to move backward, which will cause the bending adjustment tube 310 to be difficult to bend, increase the difficulty of bending the expansion sheath 510, and thus increase the tension of the expansion wire, which may cause the expansion wire to break, or cause the bending wire to bend due to lack of space to move backward, thereby affecting the bending action of the bending adjustment tube 310. The present invention utilizes a separate design for the wire fixture 323 and the inner movable member 324. The wire fixture 323 can automatically move backward (proximally), leaving space for the bending wire to move backward. This reduces the difficulty of bending the dilation sheath 510 and prevents the bending wire from bending. Similarly, when the bending tube 310 is actively bent, the distal end of the dilation sheath 510 will bend passively. Therefore, the interior of the dilation handle 520 preferably adopts the same internal structure as the bending handle 320.

[0116] The distal ends of the bend adjustment tube 310 and the expansion sheath 510 are usually elastic, so when the tension of their respective pull wires is removed, the distal ends of the two can straighten themselves. Therefore, the separate design of the pull wire fixing part and the inner moving part also prevents the distal ends of the bend adjustment tube 310 and the expansion sheath 510 from being forced to straighten manually. If one of the distal ends of the bend adjustment tube 310 and the expansion sheath 510 is in a bent state, forcing the other to straighten will also cause difficulty in straightening due to the obstruction of the bent tube body, or cause the pull wire that has not been operated to straighten the tube body to be forcibly pushed without space to move back, causing bending, affecting normal function. The use of a split structure avoids the risk of forced straightening manually.

[0117] In some embodiments, reference Figure 7The wire fixing end includes a wire fixing hole 3231 and a wire fixing rod 3232. The wire fixing hole 3231 is provided on the outer wall of the wire fixing part, and the axial direction of the wire fixing hole 3231 is parallel to the axial direction of the rotating part 321. The design that the axial direction of the wire fixing hole 3231 is parallel to the axial direction of the rotating part can avoid the problem that the end of the wire fixing rod 3232 interferes with the internal thread of the rotating part, causing the rotating part 321 to be unable to rotate normally. The wire fixing rod 3232 is inserted into the wire fixing hole 3231. When the bending wire needs to be fixed, the bending wire is wound and fixed on the wire fixing rod 3232.

[0118] 6(a) and 6(b), the inner moving member 324 is provided with avoidance grooves 3242 on the distal and proximal sides of the wire transition hole 3241. The avoidance grooves 3242 can prevent the risk of squeezing the bending wire when the inner moving member is in close contact with the wire fixing member.

[0119] 6(a) and 6(b), a glue injection slot 3221 is provided on the outer wall of the main rod 322. Providing a glue injection hole on the side of the main rod 322 solves the problem of adhesive overflow and device contamination caused by adhesive being applied to the tube / sheath before being assembled with the main rod 322.

[0120] In some embodiments, a bend-adjustment anti-rotation strip or groove is axially disposed on the outer wall of the main rod 322. Corresponding bend-adjustment anti-rotation grooves or strips are also disposed on the inner walls of the cable fixing member 323 and the inner movable member 324. As shown in FIG6( b ), a bend-adjustment anti-rotation strip 3222 is axially disposed on the outer wall of the main rod 322, a bend-adjustment anti-rotation groove 3233 is correspondingly disposed on the inner wall of the cable fixing member 323, and a bend-adjustment anti-rotation groove 3243 is correspondingly disposed on the inner wall of the inner movable member 324.

[0121] 6( c ), an external thread 3212 is provided on the outer wall of the rotating member 321. The bending handle 320 further includes a bending housing 325 and a bending limiter.

[0122] The bending shell 325 can accommodate the rotating member 321. A bending knob 3211 extends from the proximal or distal end of the bending shell 325. A shell slide 3251 is provided on the side wall of the bending shell 325. The shell slide 3251 is provided along the axial direction of the rotating member 321. Figure 5(a) to Figure 6(a) A bending adjustment seal 3252 is detachably provided at the distal end of the bending adjustment shell 325 .

[0123] The bending limit device includes a limit block 3261, and a plurality of groups of spiral push blocks 3262 are arranged on the inner side of the limit block 3261. The spiral push blocks 3262 are engaged with the external thread 3212 of the rotating part. The outer side of the limit block 3261 is slidably installed on the housing slide groove 3251.

[0124] Usually, a certain length of the bending wire will be reserved to facilitate assembly with the wire fixing part 323, so the assembly accuracy is required to be extremely high. In order to accommodate the errors in the assembly process of the bending wire, the sliding range of the wire fixing part 323 and the inner moving part 324 mounted on the main rod 322 is also relatively longer, so as to accommodate the length error when the bending wire is fixed, which indirectly leads to the problem of difficulty in controlling the length of the movement stroke of the bending wire. In order to solve this problem and prevent the bending wire from controlling its corresponding bending tube 310 to bend too much, causing the far end of the bending tube 310 to be unable to return to normal straightening, the present invention adds a bending limit device. The length of the shell slide 3251 determines the position of the far end and the proximal end of the limit block 3261, thereby limiting the rotation limit of the rotating part 321, and thus controlling the stroke of the bending wire. In actual use, after the bending wire is fixed to the wire fixing part 323, the rotating part 321 can be assembled, and after the rotating part 321 is debugged so that the inner moving part 324 is in a suitable position, the limit block 3261 is placed in the corresponding position of the slide groove, and the spiral push block 3262 is engaged with the external thread 3212 of the rotating part, so as to realize the control of its wire pulling stroke.

[0125] In some embodiments, the spiral push block 3262 is a long strip push block. Referring to FIG8 (a), two parallel spiral push blocks 3262 are provided on the inner side of the limit block 3261.

[0126] In some embodiments, the central portion of the screw pusher 3262 is concave, resulting in the screw pusher 3262 being composed of two raised blocks. Referring to Figure 8(b), two sets of screw pushers 3262 are positioned inside the stopper 3261, each set consisting of two raised blocks. The concave structure of the screw pushers 3262 significantly reduces machining accuracy and enhances smooth engagement with the external threads 3212 of the rotating member.

[0127] In some embodiments, a bend adjustment mark 3263 is provided on the outer surface of the stopper 3261. The bend adjustment mark 3263 can be a protrusion, a groove, or a colored mark, or a combination thereof. Referring to Figure 6(c), the bend adjustment mark 3263 is a protrusion whose length is perpendicular to the length of the bend adjustment housing 325. The operator can use the bend adjustment mark 3263 to determine the different positions of the stopper 3261 within the housing chute 3251, thereby displaying the status of the bend adjustment tube 310.

[0128] In some embodiments, the bending handle 325 is provided with a transparent outer cover 3253, which seals the outer surface of the housing chute 3251. The outer cover 3253 can be made of, for example, a colorless, transparent acrylic sheet or glass. The outer cover 3253 seals the housing chute 3251, thereby creating a relatively enclosed space within the bending handle 320 and preventing contamination within the handle 320.

[0129] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A tricuspid valve delivery device, comprising a bending adjustment structure, characterized in that: The bending adjustment structure comprises: A bending tube, wherein the bending tube is bendable and the distal end of the bending tube is elastic; a bending adjustment handle, the bending adjustment handle being connected to the bending adjustment tube, and the bending adjustment handle controlling the curvature of the bending adjustment tube; The bending handle comprises: A rotating member, wherein the proximal and distal ends of the rotating member are open structures, the interior of the rotating member is hollow, the inner wall of the rotating member is provided with an internal thread of the rotating member capable of driving the bending adjustment wire, and the outer wall of one end of the rotating member is sleeved with a bending adjustment knob; a main rod, the main rod being disposed in the rotating member, the distal end of the main rod being an open structure and the interior of the main rod being hollow; a wire fixing member, the wire fixing member being an annular structure, the wire fixing member being located inside the rotating member, the wire fixing member being sleeved outside the main rod and being movable along the axial direction of the main rod, and the wire fixing member being provided with a wire fixing end; An inner moving member, which is an annular structure and is located inside the rotating member. The inner moving member is sleeved on the outside of the main rod on the distal end side of the pull wire fixing member and can move axially along the main rod. The outer surface of the inner moving member is provided with an inner moving member external thread, and the inner moving member external thread is threadedly connected to the rotating member internal thread. A pull wire transition hole is axially provided on the side wall of the inner moving member to connect the distal end and the proximal end; At least one bending adjustment wire, one end of which is connected to the bending adjustment tube, and the other end of which is connected to the fixed end of the wire after passing through the bending adjustment tube, the rotating member, the main rod and the wire transition hole in sequence; The tricuspid valve delivery device further includes an expansion structure, which includes an expansion sheath and an expansion handle. The expansion sheath is bendable, the bending adjustment tube passes through the interior of the expansion sheath, and the expansion handle has a pull wire fixing part and an inner moving part with the same structure as the bending adjustment handle. When the inner moving part of the expansion handle pushes the pull wire fixing part of the expansion handle to move proximally, driving the expansion pull wire to bend the distal end of the expansion sheath, the bending adjustment tube is driven to bend, and the pull wire fixing part of the bending adjustment handle moves proximally on its own; When the inner movable part of the bending adjustment handle moves toward the distal end, the pull wire fixing part of the bending adjustment handle is at a distance from the inner movable part of the bending adjustment handle. Under the action of the automatic rebound and straightening of the distal end of the bending adjustment tube, the pull wire fixing part of the bending adjustment handle automatically moves toward the distal end driven by the bending wire.

2. The tricuspid valve delivery device according to claim 1, wherein: The pull wire fixed end comprises: a wire fixing hole, the wire fixing hole being provided on the outer wall of the wire fixing member, the axial direction of the wire fixing hole being parallel to the axial direction of the rotating member; A wire fixing rod is inserted into the wire fixing hole and is used for winding the bending wire.

3. The tricuspid valve delivery device according to claim 1, wherein: The inner moving part is provided with avoidance grooves on the distal side and the proximal side of the pull wire transition hole respectively.

4. The tricuspid valve delivery device according to claim 1, wherein: A glue injection groove is provided on the outer wall of the main rod.

5. The tricuspid valve delivery device according to claim 1, wherein: The outer wall of the main rod is provided with a bending and anti-rotation strip or a bending and anti-rotation groove along the axial direction; Bending and anti-rotation grooves or bending and anti-rotation strips are correspondingly provided on the inner walls of the wire fixing member and the inner moving member.

6. The tricuspid valve delivery device according to claim 1, wherein: The outer wall of the rotating member is provided with an external thread of the rotating member; The bending handle also includes: a bending adjustment housing, the bending adjustment housing being capable of accommodating the rotating member, the bending adjustment knob extending from a proximal end or a distal end of the bending adjustment housing, a housing slide groove being provided on a side wall of the bending adjustment housing, the housing slide groove being provided along the axial direction of the rotating member; A bending limit device, which includes a limit block, a plurality of groups of spiral push blocks are arranged on the inner side of the limit block, the spiral push blocks are engaged with the external threads of the rotating part, and the outer side of the limit block is slidably installed on the shell slide groove.

7. The tricuspid valve delivery device according to claim 6, wherein: The spiral push block is a long strip push block; Or the middle part of the spiral push block is a concave structure, so that the spiral push block is composed of two protruding blocks.

8. The tricuspid valve delivery device according to claim 6, wherein: A bending adjustment mark is provided on the outer surface of the limit block.

9. The tricuspid valve delivery device according to claim 8, wherein: The bending adjustment mark is one or more combinations of ridges, grooves or colored marks.

10. The tricuspid valve delivery device according to claim 6, wherein: The bending adjustment housing is provided with a transparent outer cover, and the outer cover is sealed and covers the outer side of the housing sliding groove.

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