Multidirectional bending adjusting conveyor and valve conveying system

Abstract

The invention provides a multi-direction bending adjusting conveyor and a valve conveying system, and relates to the technical field of medical equipment. The multidirectional bending-adjusting conveyor can comprise a catheter assembly, the catheter assembly can comprise a bending-adjusting pipe, the bending-adjusting pipe can comprise a bending-adjusting part and a straightening part which are rotatably connected with each other, and the bending-adjusting part can comprise a plurality of snake bone units which are connected end to end. A first connecting lug is arranged at one end of each snake bone unit, a second connecting lug is arranged at the other end of each snake bone unit, and the first connecting lugs and the second connecting lugs are pivotally connected. According to the scheme, the included angle between the connecting line of the centers of the two first connecting lugs and the connecting line of the centers of the two second connecting lugs of the same snake bone unit ranges from 0 degree to 90 degrees, by selecting different included angles, the bending adjusting pipe can be bent to the needed angle and position according to requirements, and therefore different bending requirements are met, and the bending efficiency is improved. Therefore, the accuracy and efficiency of positioning the valve to the lesion position by the conveyor are improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a multi-directional bending conveyor and valve delivery system. Background Technology

[0002] Heart valve replacement surgery involves delivering a new valve to a designated location via a delivery system and then releasing it to replace the existing valve and ensure the heart functions normally. The delivery system is crucial to heart valve replacement surgery, and its structure and function significantly impact the ease of the procedure and its success rate. Currently available delivery systems mostly allow the catheter to bend in only one or two directions within a two-dimensional plane. However, the pathways of the heart's blood vessels are complex and vary from person to person. Catheters that bend in only one or two directions have low flexibility, making it difficult for the delivery system to position the valve at the lesion site, hindering coaxial valve implantation, limiting the treatment process, and potentially causing secondary damage to organs. Summary of the Invention

[0003] One objective of the first aspect of the present invention is to provide a multi-directional bending delivery device that solves the problem that in the prior art, catheters can only bend in one or two directions in a two-dimensional plane, resulting in low accuracy and efficiency in delivering valves to designated locations.

[0004] Another objective of the first aspect of the present invention is to solve the problem of poor safety of conveyors in the prior art.

[0005] A second aspect of the present invention is to provide a valve delivery system including the multi-directional bending delivery device.

[0006] Specifically, the present invention also provides a multi-directional bending conveyor, including a conduit assembly, the conduit assembly including a bending tube, the bending tube including a bending section and a straightening section connected to each other, the bending section including a plurality of serpentine units rotatably connected end to end; each serpentine unit includes a body, a pair of first connecting ears disposed at one end of the body axis and a pair of second connecting ears disposed at the other end of the body axis; the pair of second connecting ears of the preceding serpentine unit and the pair of first connecting ears of the following serpentine unit are pivotally connected to each other, and the axis of rotation extends radially along the body; the line connecting the centers of the two first connecting ears of the same pair and the line connecting the centers of the two second connecting ears of the same pair both pass through the central axis of the body, and the angle between the projection of the line connecting the centers of the two first connecting ears of the same serpentine unit and the line connecting the centers of the two second connecting ears onto a preset plane is 0° to 90°, wherein the preset plane is a plane perpendicular to the axis of the body.

[0007] Optionally, at least one of the included angles is neither 0° nor 90°.

[0008] Optionally, a first through hole is provided at each of the first connecting ears, and a second through hole is provided at each of the second connecting ears. After the first connecting ears and the second connecting ears are snapped together, a fastener passes through both the first through hole and the second through hole simultaneously, so that two adjacent snake bone units rotate around the fastener as a pivot.

[0009] Optionally, both ends of the snake bone unit are configured to form a plane from the center of the first connecting ear or the second connecting ear away from the center position, the plane being parallel to the preset plane; and the center of the first through hole protrudes from the end where the first through hole is located, and / or the center of the second through hole protrudes from the end where the second through hole is located, so that after two adjacent snake bone units are pivotally connected, a preset distance is left between the two closest ends.

[0010] Optionally, at least one end of the snake bone unit is configured to form a plane from the center of the first connecting ear or the second connecting ear away from the center position, the plane being at a preset angle to the preset plane and inclined toward the body itself, wherein the preset angle is 0 to 90°, excluding 0° and 90°;

[0011] Optionally, at least one end of the snake-bone unit is configured to form an arc surface from the center of the first connecting ear or the second connecting ear away from the center position.

[0012] Optionally, it also includes at least one set of bending drive components, each set of bending drive components including a bending member, the bending member being disposed on the outer wall or inner wall of the snake bone unit.

[0013] Optionally, the bending adjustment components are arranged in a spiral shape;

[0014] Optionally, the bending member is disposed on the outer or inner wall at the middle or near the middle position of the two first connecting ears or two second connecting ears of one of the snake-bone units.

[0015] Optionally, each of the bending drive components further includes a plurality of connectors, through which the bending component is connected to the outer or inner wall of the corresponding snake-bone unit.

[0016] Optionally, the bending portion is provided with at least one axially protruding first protrusion and at least one axially recessed first groove at one end near the straightening portion; the straightening portion is provided with at least one axially protruding second protrusion and at least one axially recessed second groove at one end near the bending portion, and the bending portion and the straightening portion are connected to each other by the first protrusion cooperating with the first groove and the second protrusion cooperating with the second groove.

[0017] Optionally, the bending tube further includes a first polymer layer disposed outside the bending section and the straightening section.

[0018] Optionally, the conduit assembly further includes an inner tube that passes through the inside of the bend-adjusting tube, with the near distal end of the inner tube sealed to the distal end of the bend-adjusting tube, and the proximal end of the inner tube in fluid communication with a first vent valve to discharge air from the inner tube through the first vent valve.

[0019] Optionally, the conduit assembly further includes an outer tube, which is sleeved outside the bending tube. The distal end of the outer tube is in contact with the distal end of the inner tube, and the outer tube and the bending tube are sealed by a first sealing element at the distal end. A second vent valve is provided between the proximal end of the outer tube and the bending tube to release air between the outer tube and the bending tube.

[0020] Optionally, the outer tube comprises a metal tube, the metal tube including at least one axially extending rib of the metal tube;

[0021] Optionally, the metal tube includes a front section, a middle section, and a rear section, wherein the flexibility of the middle section is greater than that of the front section and the rear section;

[0022] Optionally, the outer tube further includes at least one second polymer layer, at least one layer of the second polymer layer covering the outside of the metal tube.

[0023] Optionally, the conduit assembly further includes a buffer tube, which is sleeved outside the outer tube to provide a buffering effect;

[0024] Optionally, the proximal end of the buffer tube is sealed to the outer tube by a second sealing element, and a third vent valve is provided between the proximal end of the buffer tube and the outer tube to release the air between the buffer tube and the outer tube.

[0025] Optionally, it also includes a stress diffusion tube disposed between the proximal end of the buffer tube and the third vent valve to form a buffer.

[0026] Optionally, it also includes a screw and a bending knob assembly, wherein the screw is sleeved outside the straight portion of the bending tube, and one end of the screw is connected to the third vent valve and the other end is connected to the first vent valve, and the screw is provided with an axially extending elongated hole;

[0027] The bending knob assembly includes:

[0028] A knob, which is fitted over the screw and rotates under the action of external force;

[0029] The driving component is a cylindrical structure that is sleeved on the outside of the screw and rotates with the knob. The driving component has a spiral-shaped first groove inside.

[0030] A bending connector is fixedly connected to the proximal end of the bending member. The bending connector is sleeved outside the straightening part and has a first protrusion. The first protrusion passes through the elongated hole and engages with the first groove so that when the driving member rotates, the bending connector moves along the axial direction of the bending tube, thereby pulling the bending member to bend or straighten the bending tube.

[0031] Optionally, the bending knob assembly further includes:

[0032] The main force-applying plate is cylindrical and is sleeved on the screw. The main force-applying plate is threadedly connected to the knob so that the main force-applying plate rotates with the knob.

[0033] The secondary force-applying plate, which is cylindrical, is sleeved outside the screw. The primary force-applying plate and the secondary force-applying plate are in contact with each other so that the secondary force-applying plate rotates when the primary force-applying plate rotates. The inner wall of the secondary force-applying plate is connected to the driving member so that the driving member rotates when the secondary force-applying plate rotates.

[0034] Optionally, both the main force-applying plate and the secondary force-applying plate are friction plates;

[0035] Optionally, both the main force-applying plate and the secondary force-applying plate are torsion gear plates, and the two torsion gear plates mesh with each other so that the secondary force-applying plate rotates following the main force-applying plate.

[0036] Optionally, the bending knob assembly further includes:

[0037] A stop member, which is connected to the proximal end of the screw; and

[0038] An elastic element is disposed between the end of the main force-applying plate away from the secondary force-applying plate and the retaining ring, so as to adjust the upper and lower limits of the bending force by adjusting the pressure of the elastic element on the main force-applying plate and the secondary force-applying plate, or the interaction force between the main force-applying plate and the secondary force-applying plate.

[0039] Optionally, the bending knob assembly further includes:

[0040] A viewing window tube is fixedly connected to the screw and abuts against the bending knob; a third groove extending axially is provided inside the viewing window tube; and

[0041] A bending indicator is engaged in the third groove, and the inner surface of the bending indicator is threadedly connected to the outer surface of the drive member so that the bending indicator moves axially when the drive member rotates.

[0042] In particular, the present invention also provides a valve delivery system, comprising:

[0043] The multi-directional bending conveyor described above; and

[0044] The release knob assembly is used to drive the outer tube to move axially relative to the bending tube, thereby retracting or releasing the valve;

[0045] The release knob assembly includes:

[0046] The knob connecting ring connects to the second vent valve; and

[0047] The release knob is rotatably connected to the knob connecting ring at its distal end. When the release knob is subjected to an external force and moves axially, it drives the knob connecting ring to move axially, thereby driving the second vent valve and the outer pipe to move axially.

[0048] The multi-directional bending delivery device of this solution may include a catheter assembly, which may include a bending tube, and the bending tube may include multiple rotatably connected serpentine units and a straightening section. One end of each serpentine unit has a first connecting ear, and the other end has a second connecting ear, which are pivotally connected to each other. Furthermore, in this solution, the angle between the center line connecting the two first connecting ears and the center line connecting the two second connecting ears of the same serpentine unit is 0–90°. By selecting different angles, the bending tube can be bent to the required angle and position, achieving three-dimensional bending, thereby meeting different bending requirements and improving the accuracy and efficiency of the delivery device in positioning the valve to the lesion location.

[0049] This design uses a knob to rotate the main force-applying plate and the secondary force-applying plate. The secondary force-applying plate then drives the driving component to rotate, which in turn drives the bending connector to move axially. This causes the bending component to bend or straighten the bending section. During rotation, if the applied force exceeds the force separating the main and secondary force-applying plates, slippage will occur. This avoids torque caused by excessive operation, protecting the bending component from damage and preventing additional damage to blood vessels due to excessive bending. It offers good safety performance.

[0050] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0051] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0052] Figure 1 This is a schematic diagram of the structure of a conveyor according to a specific embodiment of the present invention;

[0053] Figure 2 This is a partial exploded structural diagram of a conveyor according to a specific embodiment of the present invention;

[0054] Figure 3 This is a schematic diagram of the structure of the bending tube of the conveyor according to a specific embodiment of the present invention after three-dimensional bending at one angle.

[0055] Figure 4 This is a schematic diagram of the conveyor's bending tube after three-dimensional bending according to a specific embodiment of the present invention, from another angle.

[0056] Figure 5 This is a schematic diagram of the structure of the bending tube of the conveyor according to a specific embodiment of the present invention after three-dimensional bending at another angle;

[0057] Figure 6 This is a partial structural diagram of the bending section of the bending pipe according to a specific embodiment of the present invention.

[0058] Figure 7 This is a partial structural diagram of the bending section of the bending pipe according to a specific embodiment of the present invention.

[0059] Figure 8 This is a schematic structural diagram of a snake-bone unit for a bend-adjusting pipe according to a specific embodiment of the present invention;

[0060] Figure 9 This is a partial structural diagram of the bending section of the bending pipe according to a specific embodiment of the present invention.

[0061] Figure 10 This is a partial structural schematic diagram of the bending section of the bending pipe according to another specific embodiment of the present invention.

[0062] Figure 11 This is a partial structural diagram of the bending section of the bending pipe according to yet another specific embodiment of the present invention.

[0063] Figure 12 This is a partial structural schematic diagram of the bending section of the bending pipe according to another specific embodiment of the present invention.

[0064] Figure 13 yes Figure 12 A magnified view of a portion of the image;

[0065] Figure 14This is a partial structural diagram of the connection between the bending section and the straightening section of a bending pipe according to a specific embodiment of the present invention.

[0066] Figure 15 This is a partial structural diagram of the outer tube according to a specific embodiment of the present invention;

[0067] Figure 16 This is a partially enlarged schematic diagram of the outer tube according to a specific embodiment of the present invention;

[0068] Figure 17 This is a partially exploded structural diagram of a conveyor according to a specific embodiment of the present invention;

[0069] Figure 18 This is an exploded structural diagram of the bending knob assembly of a conveyor according to a specific embodiment of the present invention.

[0070] Figure 19 This is a partially exploded structural diagram of the bending knob assembly of a conveyor according to a specific embodiment of the present invention;

[0071] Figure 20 This is a schematic diagram of the structure of the knob of the bending knob assembly according to a specific embodiment of the present invention;

[0072] Figure 21 This is a schematic diagram of the structure of the drive component of the bending knob assembly according to a specific embodiment of the present invention;

[0073] Figure 22 This is a schematic diagram of the delivery device according to a specific embodiment of the present invention before valve pressing;

[0074] Figure 23 This is a schematic diagram of the delivery device according to a specific embodiment of the present invention after valve pressing;

[0075] Figure 24 This is a schematic diagram of a conveyor reaching a designated position according to a specific embodiment of the present invention;

[0076] Figure 25 This is a schematic diagram of the structure of a delivery valve with incomplete release according to a specific embodiment of the present invention;

[0077] Figure 26 This is a schematic diagram of the structure of a delivery valve for complete release according to a specific embodiment of the present invention;

[0078] Figure 27 This is a schematic diagram of the structure when the delivery device fully releases and removes the valve according to a specific embodiment of the present invention.

[0079] Explanation of reference numerals in the attached figures:

[0080] Multi-directional bending conveyor-100;

[0081] Conduit assembly - 200; Bending tube - 210; Bending section - 211; Snake bone unit - 2111; Body - 2112; First connecting ear - 2113; Second connecting ear - 2114; First through hole - 2115; Second through hole - 2116; First protrusion - 2117; First slot - 2118; Rivet - 2119; Straightening section - 212; First rib - 2121; Second rib - 2122; Second protrusion - 2123; Second slot - 2124; Top ring - 213;

[0082] Inner tube -220; Tip -221;

[0083] Outer tube - 230; Third rib - 231; Fourth rib - 232; Front section - 233; Middle section - 234; Rear section - 235; Buffer tube - 240; Stress diffusion tube - 250;

[0084] Bending drive assembly - 300; Connector - 310; Fixing hole - 311; Bending component - 320;

[0085] First vent valve -400; Second vent valve -500;

[0086] Release knob assembly - 600; Release knob - 610; Protrusion - 611; Knob connecting ring - 650; Groove 651; Connecting ring - 660;

[0087] Third exhaust valve - 700; Handle - 800; Screw - 810; External thread - 811; Long slot hole 812;

[0088] Adjusting knob assembly - 900; Knob - 910; Third slot - 911; Drive component - 920; First groove - 921; Fourth slot - 922; Second groove - 923; Adjusting connector - 930; First protrusion - 931; Main force plate - 940; Third protrusion - 941; Secondary force plate - 950; Fourth protrusion - 951; Retaining ring - 960; Spring - 970; Viewing window tube - 980; Third groove - 981; Adjusting indicator plate - 990; Second protrusion - 991;

[0089] Valve-1000. Detailed Implementation

[0090] In the description of this embodiment, it should be understood that the terms "length", "width", "height", "up", "down", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0091] As a specific embodiment of the present invention, such as Figures 1-5 As shown, this embodiment provides a multi-directional bending conveyor 100, which may include a conduit assembly 200. The conduit assembly 200 may include a bending tube 210, which may include a bending section 211 and a straightening section 212 connected to each other. The bending section 211 may include a plurality of serpentine units 2111 rotatably connected end to end. Each serpentine unit 2111 may include a body 2112, a pair of first connecting ears 2113 disposed at one end of the body 2112 along the axial direction, and a pair of second connecting ears 2114 disposed at the other end of the body 2112 along the axial direction. The pair of second connecting ears 2114 of the preceding serpentine unit 2111 is pivotally connected to the pair of first connecting ears 2113 of the following serpentine unit 2111, and the axis of rotation extends radially along the body 2112. The line x connecting the centers of the two first connecting ears 2113 of the same pair and the line y connecting the centers of the two second connecting ears 2114 of the same pair both pass through the central axis of the body 2112. The angle α between the lines x connecting the centers of the two first connecting ears 2113 and the lines y connecting the centers of the two second connecting ears 2114 of the same snake bone unit 2111 when projected onto the preset plane is 0° to 90°. The preset plane is a plane perpendicular to the axis of the body 2112.

[0092] Specifically, the multi-directional bending delivery device 100 of this embodiment may include a catheter assembly 200, which may include a bending tube 210. The bending tube 210 may include a bending section 211 and a straightening section 212 connected to each other. The bending section 211 may include a plurality of serpentine units 2111 rotatably connected end to end. Each serpentine unit 2111 has a first connecting ear 2113 at one end and a second connecting ear 2114 at the other end, and the first connecting ear 2113 and the second connecting ear 2114 are pivotally connected to each other. In this embodiment, the included angle α between the center line x of the two first connecting ears 2113 and the center line y of the two connecting ears 2114 of the same serpentine unit 2111 is 0° to 90°. By selecting different included angles α, the bending tube 210 can be bent to the required angle and position as required, thereby achieving three-dimensional bending, meeting different bending requirements, and thus improving the accuracy and efficiency of the delivery device 100 in positioning the valve to the lesion location.

[0093] Specifically, the cross-section of the body 2112 in this embodiment is circular, elliptical, square, or other shapes. Furthermore, the axial length of each body 2112 is adjustable, and the axial lengths of the bodies 2112 of different snake-bone units 2111 can be the same or different, and can be designed according to actual conditions.

[0094] Specifically, in this embodiment, the included angle α can be 0°, 30°, 60°, 70°, 80°, or 90°. Specifically, in this embodiment, the angle α of different snake-bone units 2111 can be the same or different, and the specific angle α can be selected as needed. When the included angle α of all snake-bone units 2111 is 0° or all are 90°, the bending portion 211 of the bending tube 210 bends towards a two-dimensional plane. When one of the included angles α of the snake-bone units 2111 is not equal to 0° or not equal to 90°, the bending portion 211 can bend towards a three-dimensional space.

[0095] More specifically, before surgery, the condition of the heart to be operated on can be understood and analyzed, and then a bending tube 210 consistent with the direction of the heart's blood vessels can be customized. For example, if the blood vessels are curved from proximal to distal, the first segment is two-dimensional, the second segment is three-dimensional, the third segment is two-dimensional, and the fourth segment is three-dimensional. When designing the bending section 211, the included angle α of each snake bone unit 2111 near the straightening section 212 can be designed to be 90° or 0°. Then, when this segment bends, it bends toward a plane perpendicular to the line connecting the centers of the two first connecting ears 2113 of the snake bone unit 2111, or toward a plane perpendicular to the line connecting the centers of the two second connecting ears 2114 of the snake bone unit 2111. The second segment uses multiple snake bone units 2111 with included angles not of 90° or 0° that are rotatably connected to achieve three-dimensional bending. The third segment uses multiple snake bone units 2111 with included angles of 90° or 0° that are rotatably connected to achieve two-dimensional bending. The fourth segment involves selecting multiple serpentine units 2111 with at least one included angle α not equal to 90° or 0° for rotatable connection and three-dimensional bending, thereby obtaining the bending section 211 that conforms to the direction of blood vessels inside the heart. This allows for smooth delivery of the valve to the designated position during surgery, improving accuracy and efficiency. Finally, after designing the angles of the two connecting ears of each serpentine unit 2111 of the bending section 211 of the bending tube 210, the bending section 211 after bending is shown in the figure below. Figures 3-5 As shown.

[0096] Unless otherwise specified, the proximal end of this invention refers to the direction closer to the surgeon, and the distal end refers to the direction farther from the surgeon. Two-dimensional bending of this invention refers to the bending portion 211 bending within a two-dimensional plane, with each snake bone unit 2111 located in the same two-dimensional plane. Three-dimensional bending refers to the bending portion 211 bending within three-dimensional space, with at least two snake bone units 2111 located in different two-dimensional planes.

[0097] As a specific embodiment of the present invention, each first connecting ear 2113 is provided with a first through hole 2115, and each second connecting ear 2114 is provided with a second through hole 2116. After the first connecting ear 2113 and the second connecting ear 2114 are engaged with each other, the fastener passes through the first through hole 2115 and the second through hole 2116 at the same time, so that the two adjacent snake bone units 2111 rotate around the fastener as the axis of rotation.

[0098] Specifically, in this embodiment, the second connecting ear 2114 of the preceding snake-bone unit 2111 and the first connecting ear 2113 of the following snake-bone unit 2111 are connected by fasteners, thereby connecting two adjacent snake-bone units 2111, allowing the snake-bone units 2111 to rotate around a pivot axis perpendicular to the central axis. The fastener can be a rivet 2119, screw, bolt, or other structure that can connect two components to each other; no limitation is made here.

[0099] As a specific embodiment of the present invention, the first connecting ear 2113 protrudes from the body 2112 in both the radial and axial directions, and the second connecting ear 2114 protrudes from the body 2112 in the axial direction and is recessed into the body 2112 in the radial direction.

[0100] Or, as another specific embodiment of the present invention, such as Figure 8 As shown, in this embodiment, the first connecting ear 2113 protrudes from the body 2112 in the axial direction and is recessed into the body 2112 in the radial direction, while the second connecting ear 2114 protrudes from the body 2112 in both the radial and axial directions.

[0101] Of course, as other embodiments, the first connecting ear 2113 and the second connecting ear 2114 in this embodiment can also be other structures that can achieve rotatable connection.

[0102] Specifically, the structures of the first connecting ear 2113 and the second connecting ear 2114 can be selected as needed.

[0103] The first connecting ear 2113 and the second connecting ear 2114 are designed in this way so that when the snake bone units 2111 are connected to each other, the first connecting ear 2113 and the second connecting ear 2114 can be interlocked with each other without taking up too much space.

[0104] Specifically, in this embodiment, in order to ensure that the snake bone unit 2111 may rotate around the connecting ear, the connecting ear can be designed as an arc-shaped or circular structure.

[0105] As a specific embodiment of the present invention, such as Figure 9 As shown, in this embodiment, after two adjacent snake-bone units 2111 are pivotally connected, the plane a containing the two proximal ends is parallel to the preset plane b. Furthermore, the center of the first through hole 2115 protrudes from the end containing the first through hole 2115, and / or the center of the second through hole 2116 protrudes from the end containing the second through hole 2116, so that after the two adjacent snake-bone units 2111 are pivotally connected, a preset distance n is maintained between the two proximal ends. The preset plane is a plane perpendicular to the axial direction of the body 2112.

[0106] Specifically, since the ends of the snake-bone unit 2111 are flat, a certain distance needs to be maintained between the ends of two adjacent snake-bone units 2111 to ensure relative rotation between them. Preferably, the center of at least one of the two through holes needs to be outside the ends to ensure relative rotation between the snake-bone units 2111.

[0107] Specifically, in this embodiment, the rotation angle between two adjacent snake-bone units 2111 is related to the value of a preset distance n. The larger the preset distance n, the larger the rotation angle. Therefore, the rotation angle can be adjusted by adjusting the preset distance n. The preset distance n between multiple snake-bone units 2111 in the bending section 211 can be different. Different preset distances n can make the bending section 211 form shapes with different bending radii, thus flexibly adapting to more blood vessel directions.

[0108] As another specific embodiment of the present invention, such as Figure 10 and Figure 11 As shown, at least one end of the snake bone unit 2111 in this embodiment is configured such that a plane formed from the center of the connecting ear toward a position away from the center forms a preset angle c with a preset plane and is inclined toward the body 2112 itself. The preset plane b is a plane perpendicular to the axis of the body 2112, and the preset angle is 0 to 90°. Specifically, the angle does not include 0° or 90°.

[0109] Specifically, in this embodiment, the center of the connecting ear (first connecting ear 2113 or second connecting ear 2114) of the snake bone unit 2111 can be flush with the end or protrude from the end. Since the end is inclined, the inclined surface of the end can have a certain rotation space when two adjacent snake bone units 2111 rotate relative to each other.

[0110] Specifically, in this embodiment, the rotation angle between two adjacent snake-bone units 2111 is related to a preset angle c. The larger the preset angle c is, the larger the rotation angle is. Therefore, the rotation angle can be adjusted by adjusting the preset angle c. Of course, the preset angle c between different snake-bone units 2111 can be designed to be different. Different preset angles c can make the bending part 211 form a shape with different bending radii, thus flexibly adapting to more blood vessel directions.

[0111] In this embodiment Figure 10 This illustrates the case where, at the same bend 211, at opposite ends of two partially adjacent snake-bone units 2111, one end is formed as a plane and the other end as a slope. It also shows the case where both ends of two partially adjacent snake-bone units 2111 are sloped. Figure 11 This illustrates a case where, at the same bend 211, the opposite ends of two partially adjacent snake-bone units 2111 are both formed as planes, and the two ends of two partially adjacent snake-bone units 2111 are both bevels. Specifically, embodiments of this solution are not exhaustive, and similar variations are all within the scope of protection of this solution.

[0112] As a specific embodiment of the present invention, at least one end of the snake bone unit in this embodiment is configured to form an arc surface from the center of the first connecting ear 2113 or the second connecting ear 2114 away from the center position.

[0113] The curved surface design allows for rotational space between the snake bone units 2111, ensuring that adjacent snake bone units 2111 can rotate relative to each other. Specifically, the shape of the curved surface at the end of each snake bone unit 2111 can be designed to be the same or different. Different curved surfaces allow the bending section 211 to form shapes with different bending radii, thus flexibly adapting to more blood vessel routes.

[0114] As a specific embodiment of the present invention, such as Figure 6 , Figure 7 , Figure 12 and Figure 13 As shown, the multi-directional bending conveyor 100 of this embodiment may further include at least one set of bending drive components 300, each set of bending drive components 300 may include a bending member 320, which is connected to the outer wall of the snake-bone unit 2111 (e.g., Figure 6 and Figure 7 (as shown) or inner wall (such as) Figure 12 and Figure 13 (as shown) at the location.

[0115] Specifically, the bending member 320 can be a bending wire. The bending wire is arranged along the bending section 211, thereby causing the bending section 211 to bend.

[0116] In one embodiment, a set of bending drive components 300 can be used to drive the bending section 211. Specifically, a bending wire is used to drive the bending section 211 to bend along a three-dimensional direction.

[0117] In other embodiments, the bending section 211 can be driven by at least two bending drive components 300, thereby bending the bending section 211 in three dimensions through the cooperation of multiple bending wires.

[0118] Preferably, if the bending portion 211 is helically bent in three dimensions, the bending member 320 is also helically arranged in the bending portion, so that the bending portion 211 can be bent along the plane containing the axes of the bending member 320 and the bending portion 211.

[0119] Specifically, the bending member 320 is disposed on the outer or inner wall at the middle or near the middle position of the two first connecting ears 2113 or the two second connecting ears 2114 of one of the snake bone units 2111.

[0120] Preferably, the bending member 320 is disposed in the middle of the two first connecting ears 2113 or in the middle of the two second connecting ears 2114, so as to achieve the purpose of driving the bending part 211 to bend with a smaller force.

[0121] In a specific embodiment of the present invention, each set of bending drive components 300 may include multiple connectors 310, through which the bending member 320 is connected to the outer or inner wall of the corresponding snake-bone unit 2111. Specifically, each connector 310 is provided with a fixing hole 311 for the bending member 320 to pass through and be fixed. Each connector 310 is located on the outer or inner wall between the two first connecting ears 2113 of one snake-bone unit 2111, or on the inner or outer wall between the two second connecting ears 2114 of the snake-bone unit 2111. In a specific embodiment of the present invention, in this embodiment, at least one snake-bone unit 2111 is spaced apart between two adjacent snake-bone units 2111 of the bending tube 210 where the connectors 310 are provided, and the number of spaced snake-bone units 2111 is preferably odd.

[0122] Specifically, in this embodiment, at least one snake-bone unit 2111 is provided between two adjacent snake-bone units 2111 with connector 310 to avoid excessive rotation angle between two adjacent snake-bone units 2111, which would cause inconvenience to the operation of the bending member 320. In this embodiment, the number of snake-bone units 2111 between two adjacent snake-bone units 2111 with connector 310 is one, so that the bending tube 210 can be precisely controlled to bend.

[0123] As a specific embodiment of the present invention, the straightening portion 212 of this embodiment may include at least one rib extending axially along the bending tube 210.

[0124] In one embodiment, when there is only one rib, the rib is spiraled circumferentially and extends axially to form a bending tube 210. The stiffness of the bending tube 210 can be adjusted by adjusting the size, material, or spiral density of the rib.

[0125] As another specific embodiment, such as Figure 14 As shown, the rib specifically includes multiple first ribs 2121 extending axially along the bending pipe 210 and multiple second ribs 2122 extending circumferentially along the bending pipe 210, with the first ribs 2121 and the second ribs 2122 connected to each other.

[0126] Specifically, in this embodiment, the number of first ribs 2121 at the straightened portion 212 can be two, and they are arranged opposite to each other. In other embodiments, the number of first ribs 2121 can be multiple, each first rib 2121 is parallel to the axis of the straightened portion 212, and the multiple first ribs 2121 are evenly arranged in the circumferential direction.

[0127] In other embodiments, the straightening portion 212 may be composed of more ribs of different shapes and arrangements, or it may be formed by combining the ribs of the above embodiments with the ribs of other embodiments.

[0128] As a specific embodiment of the present invention, the bending member 320 in this embodiment is located near one of the first reinforcing bars 2122 at the straightening part 212 and at the wire outlet.

[0129] Specifically, since the bending member 320 needs to be pulled and force applied to the bending tube 210, and only the bending portion 211 of the bending tube 210 needs to be bent, while the straightening portion 212 cannot be bent, the bending member 320 needs to be located at the first rib 2121 to prevent the straightening portion 212 from bending. Furthermore, to prevent the straightening portion 212 from bending, the bending member 320 also needs a first rib 2121 on its radially opposite side. In other embodiments, for the sake of the rigidity of the straightening portion 212, the more first ribs 2121 the better. However, too many first ribs 2121 will affect the weight of the overall structure. Therefore, the number of first ribs 2121 can be designed according to specific circumstances. In this embodiment, the number of first ribs 2121 is selected as two, symmetrically distributed.

[0130] As a specific embodiment of the present invention, such as Figure 14As shown, in this embodiment, the bending portion 211 near the straightening portion 212 is provided with at least one axially protruding first protrusion 2117 and at least one axially recessed first groove 2118. The straightening portion 212 near the bending portion 211 is provided with at least one axially protruding second protrusion 2123 and at least one axially recessed second groove 2124. The bending portion 211 and the straightening portion 212 are connected by the engagement of the first protrusion 2117 with the first groove 2118 and the engagement of the second protrusion 2123 with the second groove 2124.

[0131] In this embodiment, the bending part 211 and the straightening part 212 cooperate with each other through the first slot 2118 and the first protrusion 2117, the second slot 2124 and the second protrusion 2123, so that the bending part 211 and the straightening part 212 can be firmly connected together.

[0132] As a specific embodiment of the present invention, the bending tube 210 of this embodiment may further include a first polymer layer disposed outside the bending portion 211 and the straightening portion 212.

[0133] Specifically, in this embodiment, the first polymer layer can fill the gaps between the bending section 211 and the straightening section 212 to achieve a sealing effect. Alternatively, the first polymer layer can also cover the outside of the bending tube 210. However, since the polymer layer is flexible, it can move with the bending section 211.

[0134] Specifically, the material of the first polymer layer in this embodiment is selected from PE, nylon or polyurethane.

[0135] Specifically, the distal end of the bending tube 210 in this embodiment (the left side in the figure is the distal end, and the right side is the proximal end) may also include a top ring 213. This top ring 213 is specifically connected to the end of the bending section 211 away from the straightening section 212. The top ring 213 is used to connect the valve.

[0136] As a specific embodiment of the present invention, such as Figure 2 As shown, the conduit assembly 200 of this embodiment may further include an inner tube 220, which is inserted inside the bending tube 210. The inner tube 220 is sealed to the distal end of the bending tube 210 near the distal end, and the proximal end of the inner tube 220 is fluidly connected to the first vent valve 400 to discharge air from the inner tube 220 through the first vent valve 400.

[0137] Specifically, in this embodiment, the inner tube 220 passes through the bending tube 210, and its distal end protrudes beyond the distal end of the bending tube 210. A tip 221 is connected to the distal end of the inner tube 220. Specifically, a top ring 213 at the distal end of the bending tube 210 is also connected to the inner tube 220, and a valve is connected between the tip 221 and the top ring 213 outside the inner tube 220.

[0138] As a specific embodiment of the present invention, such as Figure 2 , Figure 15 and Figure 16 As shown, the conduit assembly 200 of this embodiment may further include an outer tube 230, which is sleeved outside the bending tube 210. The distal end of the outer tube 230 is in contact with the distal end of the inner tube 220, and the outer tube 230 and the bending tube 210 are sealed by a first sealing element (not shown in the figure) at the distal end. A second venting valve 500 is provided between the proximal end of the outer tube 230 and the bending tube 210 to vent between the outer tube 230 and the bending tube 210.

[0139] Specifically, the first sealing element in this embodiment may be a sealing ring or other sealing structure.

[0140] As a specific embodiment of the present invention, the outer tube 230 may include a metal tube, and the metal tube may include at least one rib extending axially along the metal tube.

[0141] In one embodiment, there is one rib, which is spiraled circumferentially and extends axially to form a metal tube. The stiffness of the bending tube 210 is adjusted by adjusting the size, material, or spiral density of the rib.

[0142] As another specific embodiment, such as Figure 15 and Figure 16 As shown, in this embodiment, the ribs may include a third rib 231 extending axially along the metal tube and multiple fourth ribs 232 extending circumferentially along the metal tube, with the third rib 231 and the fourth ribs 232 connected to each other.

[0143] Specifically, in this embodiment, the outer tube 230 is composed of multiple ribs, which satisfies the rigidity requirements while reducing weight.

[0144] Specifically, the metal tube in this embodiment can be divided into a front section 233, a middle section 234, and a rear section 235, wherein the flexibility of the middle section 234 is greater than that of the front section 233 and the rear section 235. Furthermore, the dimensions of the middle section 234 match the dimensions of the bending section 211 so as to follow the bending of the bending section 211.

[0145] Specifically, when a metal tube is formed by spiraling a single rib, different levels of flexibility can be achieved in different sections by adjusting the size, material, or spiral density, thereby meeting the required flexibility.

[0146] When the metal tube is composed of a third rib 231 and a fourth rib 232, the thickness of the fourth rib 232 in the middle section 234 and the gap between two adjacent fourth ribs 232 can be smaller than the thickness of the fourth rib 232 in the front section 233 and the gap between two adjacent fourth ribs 232 in the rear section 235.

[0147] Of course, as other embodiments, the metal tube can be composed of more ribs of different shapes and / or different arrangements. Alternatively, it can be formed by combining the ribs from the two embodiments described above with ribs from other embodiments to form a section of the metal tube.

[0148] Specifically, in this embodiment, the outer tube 230 mainly provides support and protection for the inner tube 220 and the bending tube 210. Since the bending section 211 of the bending tube 210 requires three-dimensional bending, the corresponding position of the outer tube 230 also needs to move in tandem with the bending section 211. Other parts of the metal tube need to correspond to other positions of the bending tube 210, exhibiting a certain degree of rigidity. In this embodiment, the middle section 234 of the metal tube corresponds to the bending section 211, while the front section 233 and the rear section correspond to other pipe sections. Therefore, the middle section 234 of the metal tube needs to be designed to be more flexible than the front section 233 and the rear section 235. Therefore, the thickness and spacing of the fourth rib 232 of the middle section 234 in this embodiment are different from those of the front section 233 and the rear section 235. Specifically, the third rib 231 in the middle section 234 is only one, while the fourth rib 232 is thinner and the spacing between adjacent fourth ribs 232 is smaller. For the front section 233 and the rear section 235, the third rib 231 is designed to be at least two, and the fourth rib 232 is thicker and the spacing between adjacent fourth ribs 232 is also larger.

[0149] As a specific embodiment of the present invention, the third rib 231 of this embodiment is parallel to the axis of the metal tube. In order to ensure that the metal tube at the middle section 234 can bend with the bending tube 210, the number of the third rib 231 at the middle section 234 can be designed to be only one.

[0150] As another specific embodiment of the present invention, since the metal tube at the middle section 234 needs to bend along with the bending tube 210, the third rib 231 at the middle section 234 is parallel to the bending member 320 in this embodiment.

[0151] Since the rear section 235 of the metal pipe in this embodiment corresponds to the straight section 212 of the bending pipe 210, the pipe does not need to be bent at the straight section 212. Therefore, in order to avoid the bending member 320 exerting force on the straight section 212 when pulling the bending section 211 to bend, causing the straight section 212 and the rear section 235 to deform, the first rib 2121, the third rib 231 and the bending member 320 in this embodiment are close to each other and are on the same plane.

[0152] As a specific embodiment of the present invention, the outer tube 230 may further include at least one second polymer layer, which covers the outside of the metal tube. Optionally, the material of the second polymer layer may be selected from PE, nylon, polytetrafluoroethylene, or polyurethane.

[0153] Specifically, the second polymer layer in this embodiment may include one or more layers. When the second polymer layer is a single layer, it is designed on the outside of the metal tube. When the second polymer layer consists of two layers, at least one layer is disposed on the outside of the metal tube. For example, one second polymer layer may be disposed on the outside of the metal tube, and another second polymer layer may be designed on the inside of the metal tube. Alternatively, both second polymer layers may be disposed on the outside of the metal tube. Of course, in this embodiment, three second polymer layers are disposed at the metal tube, with one polymer layer disposed inside the metal tube and two polymer layers disposed on the outside. Specifically, a modified PTFE layer may be disposed inside the metal tube in this embodiment, thereby achieving a lower coefficient of friction, which is beneficial for valve release. The outer layer of the metal tube may be two TPU layers of different hardness, making the outer tube have a wider range of applications.

[0154] As a specific embodiment of the present invention, the outer tube 230 of this embodiment can not only protect and cover the bending tube 210, but also press or release the valve when the outer tube 230 moves in a controlled manner relative to the bending tube and the inner tube.

[0155] Specifically, such as Figure 17 As shown, a release knob assembly 600 is provided at the near end of the outer tube 230, and a second vent valve 500 is provided at the release knob assembly 600.

[0156] Specifically, the release knob assembly 600 of this embodiment may include a release knob 610, a knob connecting ring 650, and a connecting ring sleeve 660.

[0157] The second vent valve 500, the knob connecting ring 650, and the connecting ring sleeve 660 are located at the distal end of the release knob 610.

[0158] Specifically, in this embodiment, the second vent valve 500 is fixedly connected to the outer tube 230. Simultaneously, the second vent valve 500 is connected to the knob connecting ring 650, with a connecting ring sleeve 660 fitted over the knob connecting ring 650. A groove 651 is provided circumferentially at the proximal end of the knob connecting ring 650. A protrusion 611 is provided on the inner side of the distal end of the release knob 610, which engages with the groove 651. At this time, axial movement of the release knob 610 causes axial movement of the second vent valve 500, which in turn causes axial movement of the outer tube 230, thereby achieving the purpose of engaging and releasing the valve.

[0159] Before surgery, the release knob assembly 600 drives the outer tube 230 to expose the distal end of the inner tube 220. The valve 1000 is positioned between the tip 221 and the top ring 213 of the inner tube 220. Then, the release knob 610 of the release knob assembly 600 drives the knob connecting ring 650 to move the second vent valve 50, which in turn moves the outer tube 230, placing it over the valve 1000. At this point, the valve 1000 is located at the anterior segment 233 of the outer tube 230. During surgery, after the valve 1000 is delivered to the designated position, and slow release is required, the release knob 610 is rotated to move the outer tube 230 proximally, allowing the valve 1000 to be slowly released. Once the surgery is complete and the valve 1000 has been released, care must be taken to prevent the outer tube 230 from damaging the blood vessel.

[0160] As a specific embodiment of the present invention, such as Figure 2 As shown, the conduit assembly 200 of this embodiment may further include a buffer tube 240, which is sleeved outside the outer tube 230 to provide a buffering effect. The distal end of the buffer tube 240 is sealed to the outer tube 230 by a second sealing member (not shown in the figure), and a third vent valve 700 is provided between the proximal end of the buffer tube 240 and the outer tube 230 to release air between the buffer tube 240 and the outer tube 230.

[0161] Specifically, the buffer tube 240 in this embodiment is mainly made of polymer material. It is sleeved on the outside of the outer tube 230. The buffer tube 240 mainly prevents the outer tube 230 from damaging human organs when the outer tube 230 moves, thus protecting the human organs.

[0162] As a specific embodiment of the present invention, such as Figure 2 As shown, the conduit assembly 200 of this embodiment may further include a stress diffusion tube 250, which is disposed between the proximal end of the buffer tube 240 and the third vent valve 700 to form a buffer.

[0163] Specifically, the stress diffusion tube 250 can be made of PEBAX (block polyether amide resin). The stress diffusion tube 250 mainly plays the role of stress diffusion when the buffer tube 240 is subjected to a large force and undergoes a large deformation, so as to avoid damage to the buffer tube 240.

[0164] Specifically, in this embodiment, a handle 800 is provided at one end of the stress diffusion tube 250, and a screw 810 is provided inside the handle 800. The handle 800 and the screw 810 are fixedly connected. An external thread 811 is provided at the middle position of the screw 810, and the release knob assembly 600 is provided at the external thread 811.

[0165] The screw 810 is sleeved on the outside of the straight section 212 of the bending tube 210 and the rear section 235 of the outer tube 230. The bending tube 210 passes through the distal end of the screw 810 and reaches the proximal end of the screw 810. The outer tube 230 passes through the distal end of the screw 810 and reaches the release knob assembly 600. The release knob assembly 600 engages with the external thread 811 on the screw 810, thereby pushing the outer tube 230 to move axially along the screw 810.

[0166] Specifically, the proximal end of the screw 810 is connected to the third vent valve 700, and the distal end is connected to the first vent valve 400.

[0167] Specifically, the screw 810 has an axially extending elongated hole 812 on its side wall near the proximal end.

[0168] As a specific embodiment of the present invention, the multi-directional bending conveyor 100 of this embodiment may further include a bending knob assembly 900. Specifically, as Figures 18-21 As shown, the bending knob assembly 900 of this embodiment may include a knob 910, a drive member 920, and a bending connector 930. Specifically, the knob 910 is sleeved on the outside of the screw 810 and rotates under the action of external force. The drive member 920 has a cylindrical structure, is sleeved on the outside of the screw 810, and rotates with the knob 910. A spiral-shaped first groove 921 is provided inside the drive member 920. The bending connector 930 is fixedly connected to one end of the bending member 320. The bending connector 930 is sleeved on the outside of the straightening part 212 and has a first protrusion 931. The first protrusion 931 passes through the elongated hole 812 and cooperates with the first groove 921 so that when the drive member 920 rotates, the bending connector 930 moves along the axial direction of the middle tube, thereby pulling the bending member 320 to drive the bending tube 210 to bend or straighten.

[0169] Specifically, in this embodiment, the rotation of the knob 910 drives the drive component 920 to rotate, which in turn drives the bending connector 930 to move along the axis. The bending connector 930 is connected to one end of the bending component 320, ensuring that the bending connector 930 drives one end of the bending component 320 to move along the axial direction, thereby causing the bending component 320 to drive the bending part 211 to bend or straighten.

[0170] As a specific embodiment of the present invention, the knob 910 in this embodiment (e.g.) Figure 20 A third slot 911 is provided inside (as shown). A fourth slot 922 is also provided on the outer wall of the drive component 920 (as shown). Figure 21 (As shown). The bending knob assembly 900 may further include a main force-applying plate 940 and a driven force-applying plate 950. The main force-applying plate 940 is cylindrical and sleeved on the screw 810. A third protrusion 941, engaging with a third slot 911, is provided on the outer wall of the main force-applying plate 940 to rotate with the knob 910. The driven force-applying plate 950 is cylindrical and sleeved on the screw 810. The main force-applying plate 940 and the driven force-applying plate 950 are in contact, so that the driven force-applying plate 950 rotates when the main force-applying plate 940 rotates. A fourth protrusion 951, engaging with a fourth slot 922, is provided on the inner wall of the driven force-applying plate 950 to rotate the drive member 920 when the driven force-applying plate 950 rotates.

[0171] In this embodiment, the knob 910 drives the main force plate 940 and the secondary force plate 950 to rotate. The secondary force plate 950 then drives the drive member 920 to rotate. The drive member 920 drives the bending connector 930 to move axially along the bending tube 210, thereby causing the bending member 320 to bend or straighten the bending part 211.

[0172] In a specific embodiment of the present invention, both the main force-applying plate 940 and the secondary force-applying plate 950 are friction plates. During operation, the two friction plates abut against each other, exhibiting a certain relative frictional force. This allows the main force-applying plate 940 to drive the secondary force-applying plate 950 to rotate. Of course, during rotation, if the applied force exceeds the frictional force between the two friction plates, slippage will occur, preventing torque generated by excessive operation. This protects the bending component 320 from damage and avoids additional damage to blood vessels caused by excessive bending, resulting in good safety performance.

[0173] As another specific embodiment of the present invention, such as Figure 18 and Figure 19 As shown, in this embodiment, both the main force-applying plate 940 and the secondary force-applying plate 950 are torsion gear plates, and the two torsion gear plates mesh with each other so that the secondary force-applying plate 950 rotates with the main force-applying plate 940.

[0174] Similarly, during operation, the two torsion gears mesh with each other and exert a certain compressive force, enabling the main force-applying plate 940 to drive the secondary force-applying plate 950 to rotate. Of course, during rotation, if the applied force exceeds the force between the two torsion gears, slippage will occur, preventing torque generated by excessive operation. This protects the bending component 320 from damage and avoids additional damage to blood vessels caused by excessive bending, ensuring good safety performance.

[0175] This embodiment uses a torque gear as an example where both the main force-applying plate 940 and the secondary force-applying plate 950 are torque gears.

[0176] As a specific embodiment of the present invention, such as Figure 18 As shown, the bending knob assembly 900 of this embodiment may further include a retaining ring 960 and a spring 970. The retaining ring 960 is connected to the proximal end of the screw 810. The spring 970 is disposed between the end of the main force-applying plate 940 away from the secondary force-applying plate 950 and the retaining ring 960.

[0177] Specifically, regardless of whether the main force-applying plate 940 and the secondary force-applying plate 950 are friction plates or torsion gear plates, the force when they directly abut against each other can be applied by the spring 970.

[0178] When the main force-applying plate 940 and the secondary force-applying plate 950 are torsion gear plates, the force that pulls them apart is greater than the pressure applied by the spring 970 to the main force-applying plate 940. The torsion gear plate will slip, and the critical force when the main force-applying plate 940 and the secondary force-applying plate 950 slip apart can be adjusted by adjusting the elasticity of the spring 970, thereby effectively protecting the blood vessels.

[0179] As a specific embodiment of the present invention, the outer surface of the driving member 920 in this embodiment is further provided with a spiral-shaped second groove 923.

[0180] Specifically, the bending knob assembly 900 may further include a viewing window 980 and a bending indicator 990. The viewing window 980 is fixedly connected to the screw 810 and abuts against the knob 910. A third groove 981 extending axially is provided within the viewing window 980. The bending indicator 990 is engaged with the third groove 981, and the inner surface of the bending indicator 990 is provided with a second protrusion 991 that mates with the second groove 923, so that the bending indicator 990 moves axially when the drive member 920 rotates.

[0181] In this embodiment, the dimensions and angles of the second groove 923 and the third groove 921 are matched, so that the travel of the bending indicator 990 is consistent with that of the bending connector 930. Thus, the travel of the bending connector 930 can be directly observed through the bending indicator 990, and the bending radius of the bending tube 210 can be further understood.

[0182] Specifically, the conveyor 100 in this embodiment has the following structure:

[0183] The bend-adjusting pipe 210 is sleeved outside the inner pipe 220. The far end of the bend-adjusting pipe 210 is bonded to the inner pipe 220 with glue and kept sealed. The near end is bonded to the first vent valve 400 and the connector 310 with glue to maintain the seal between the inner pipe 220 and the bend-adjusting pipe 210, and venting is carried out through the first vent valve 400.

[0184] The outer tube 230 is fitted over the bending tube 210, and when not in use, the distal end of the outer tube 230 is flush with the distal end of the inner tube 220. The inner wall of the outer tube 230 and the distal end of the bending tube 210 are sealed by a first sealing element. The middle section of the outer tube 230 matches the length of a section of the bending tube 210 to follow the bending of the bending tube 210. The proximal end of the outer tube 230 is located in the middle section of the bending tube 210 (not exactly in the middle). The proximal end of the outer tube 230 is connected to the release knob assembly 600, and the release knob assembly 600 drives the outer tube 230 to move axially relative to the bending tube 210. The proximal end of the outer tube 230 is glued to the second vent valve 500 to maintain the seal between the outer tube 230 and the bending tube 210, and venting is performed through the second vent valve 500.

[0185] A buffer tube 240 is sleeved outside the outer tube 230. The distal end of the buffer tube 240 is sealed to the outer tube 230 by a second sealing element. The proximal end of the buffer tube 240 is connected to a stress diffusion tube 250 and then to a third vent valve 700 to form a seal. A handle 800 is provided at the third vent valve 700.

[0186] Specifically, the screw 810 is sleeved outside the outer tube 230, and the distal end of the screw 810 is connected to the stress diffusion tube 250. The handle 800 is fixedly connected to the screw 810. The external thread 811 of the middle section of the screw 810 mates with the release knob assembly 600, while the proximal end extends directly to the proximal end of the bending tube 210. A bending knob assembly 900 is provided at the proximal end of the screw 810. By pulling the bending member 320 through the bending knob assembly 900, the degree of bending of the bending tube 210 can be adjusted.

[0187] In a specific application scenario, the operation flow of the conveyor 100 in this embodiment (e.g.) Figures 22-27 (As shown) may include:

[0188] (1) Under aseptic conditions, the conveyor 100 is emptied through the first vent valve 400, the second vent valve 500 and the third vent valve 700;

[0189] (2) Rotate the release knob assembly 600 counterclockwise to expose the distal end of the inner tube 220 (e.g., Figure 22As shown), the valve 1000 is placed between the tip 221 and the top ring 213 of the inner tube 220 (as shown). Figure 23 (As shown), the valve is then pressed into the front section 233 of the outer tube 230 by rotating the release knob assembly 600 clockwise.

[0190] (3) After puncture, the delivery device 100 is inserted through the femoral artery. Combined with angiography and the bending indicator 990, the bending adjustment knob assembly 900 is used to adjust the bending adjustment tube 210 so that its direction aligns with the blood vessel (e.g., ...). Figure 24 (As shown). During the bending process using the bending knob assembly 900, when the force separating the main force plate 940 and the secondary force plate 950 is less than or equal to the pressure applied by the spring 970 to the main force plate 940, the bending member 320 can drive the bending tube 210 to bend by the joint movement of the main force plate 940 and the secondary force plate 950, combined with other components of the bending knob assembly 900, so that the bending tube reaches its final destination. When the force separating the main force plate 940 and the secondary force plate 950 during rotation is greater than the pressure applied by the spring 970 to the main force plate 940, slippage will occur between the main force plate 940 and the secondary force plate 950, thus preventing further bending of the bending tube 210, thereby protecting the bending member or avoiding damage to the blood vessel.

[0191] (4) After positioning, turn the release knob assembly 600 counterclockwise to gradually release the valve, but not completely (e.g., Figure 25 (As shown).

[0192] (5) Observe the valve's working status. If the valve implantation position is not ideal, rotate the release knob assembly 600 clockwise to completely retract the valve (status as shown). Figure 24 (As shown).

[0193] (6) Operate the bending knob assembly 900 or handle 800 to reposition the valve, and repeat steps (4) and (5) until the valve implantation position meets the requirements.

[0194] (7) Turn the release knob assembly counterclockwise to fully release the valve (e.g., ...). Figure 26 (As shown).

[0195] (8) Withdraw the delivery device 100 from the femoral artery (e.g.) Figure 27 (As shown), the valve implantation surgery was completed.

[0196] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. A multi-directional bending conveyor, characterized in that, The device includes a conduit assembly, which includes a bend-adjusting tube. The bend-adjusting tube includes an interconnected bend-adjusting portion and a straightening portion. The bend-adjusting portion includes a plurality of rotatably connected snake-bone units. Each snake-bone unit includes a body, a pair of first connecting ears disposed at one end of the body's axial direction, and a pair of second connecting ears disposed at the other end of the body's axial direction. The pair of second connecting ears of the preceding snake-bone unit is pivotally connected to the pair of first connecting ears of the following snake-bone unit, and the axis of rotation extends radially along the body. The line connecting the centers of the two first connecting ears of the same pair and the line connecting the centers of the two second connecting ears of the same pair both pass through the central axis of the body, and the angle between the projections of the lines connecting the centers of the two first connecting ears and the two second connecting ears of the same snake-bone unit onto a preset plane is 0° to 90°, wherein the preset plane is a plane perpendicular to the axis of the body.

2. The multi-directional bending conveyor according to claim 1, characterized in that, At least one of the included angles is neither 0° nor 90°.

3. The multi-directional bending conveyor according to claim 2, characterized in that, Each of the first connecting ears is provided with a first through hole, and each of the second connecting ears is provided with a second through hole. After the first connecting ear and the second connecting ear are snapped together, a fastener passes through both the first through hole and the second through hole simultaneously, so that two adjacent snake bone units can rotate around the fastener as a pivot.

4. The multi-directional bending conveyor according to claim 3, characterized in that, Both ends of the snake bone unit are configured to form a plane from the center of the first connecting ear or the second connecting ear away from the center position, and this plane is parallel to the preset plane; and the center of the first through hole protrudes from the end where the first through hole is located, and / or the center of the second through hole protrudes from the end where the second through hole is located, so that after two adjacent snake bone units are pivotally connected, a preset distance is left between the two closest ends.

5. The multi-directional bending conveyor according to claim 3, characterized in that, At least one end of the snake-bone unit is configured to form a plane from the center of the first connecting ear or the second connecting ear toward a position away from the center. This plane is at a preset angle to the preset plane and is inclined toward the body itself. The preset angle is 0 to 90°, excluding 0° and 90°. Optionally, at least one end of the snake-bone unit is configured to form an arc surface from the center of the first connecting ear or the second connecting ear away from the center position.

6. The multi-directional bending conveyor according to any one of claims 1-5, characterized in that, It also includes at least one set of bending drive components, each set of bending drive components including a bending member, the bending member being disposed on the outer or inner wall of the snake bone unit.

7. The multi-directional bending conveyor according to claim 6, characterized in that, The bending components are arranged in a spiral shape; Optionally, the bending member is disposed on the outer or inner wall at the middle or near the middle position of the two first connecting ears or two second connecting ears of one of the snake-bone units.

8. The multi-directional bending conveyor according to claim 6, characterized in that, Each of the bending drive components further includes multiple connectors, through which the bending component is connected to the outer or inner wall of the corresponding snake-bone unit.

9. The multi-directional bending conveyor according to any one of claims 1-5, characterized in that, At one end of the bending section near the straightening section, at least one axially protruding first protrusion and at least one axially recessed first groove are provided; at one end of the straightening section near the bending section, at least one axially protruding second protrusion and at least one axially recessed second groove are provided, and the bending section and the straightening section are connected to each other by the first protrusion cooperating with the first groove and the second protrusion cooperating with the second groove. Optionally, the bending tube further includes a first polymer layer disposed outside the bending section and the straightening section.

10. The multi-directional bending conveyor according to any one of claims 1-5, characterized in that, The conduit assembly further includes an inner tube that passes through the inside of the bend-adjusting tube, and the near-distal end of the inner tube is sealed to the distal end of the bend-adjusting tube. The proximal end of the inner tube is in fluid communication with a first vent valve to discharge air from the inner tube through the first vent valve.

11. The multi-directional bending conveyor according to claim 10, characterized in that, The conduit assembly also includes an outer tube, which is sleeved outside the bending tube. The distal end of the outer tube is in contact with the distal end of the inner tube, and the outer tube and the bending tube are sealed by a first sealing element at the distal end. A second vent valve is provided between the proximal end of the outer tube and the bending tube to release air between the outer tube and the bending tube. Optionally, the outer tube comprises a metal tube, the metal tube including at least one axially extending rib of the metal tube; Optionally, the metal tube includes a front section, a middle section, and a rear section, wherein the flexibility of the middle section is greater than that of the front section and the rear section; Optionally, the outer tube further includes at least one second polymer layer, at least one layer of the second polymer layer covering the outside of the metal tube.

12. The multi-directional bending conveyor according to claim 11, characterized in that, The conduit assembly also includes a buffer tube, which is sleeved outside the outer tube to provide a buffering effect; Optionally, the proximal end of the buffer tube is sealed to the outer tube by a second sealing element, and a third vent valve is provided between the proximal end of the buffer tube and the outer tube to release the air between the buffer tube and the outer tube.

13. The multi-directional bending conveyor according to claim 12, characterized in that, It also includes a stress diffusion tube, which is disposed between the proximal end of the buffer tube and the third vent valve to form a buffer.

14. The multi-directional bending conveyor according to claim 12, characterized in that, It also includes a screw and a bending knob assembly. The screw is sleeved outside the straight section of the bending tube, and one end of the screw is connected to the third vent valve and the other end is connected to the first vent valve. The screw is provided with an axially extending elongated hole. The bending knob assembly includes: A knob, which is fitted over the screw and rotates under the action of external force; The driving component is a cylindrical structure that is sleeved on the outside of the screw and rotates with the knob. The driving component has a spiral-shaped first groove inside. A bending connector is fixedly connected to the proximal end of the bending member. The bending connector is sleeved outside the straightening part and has a first protrusion. The first protrusion passes through the elongated hole and engages with the first groove so that when the driving member rotates, the bending connector moves along the axial direction of the bending tube, thereby pulling the bending member to bend or straighten the bending tube.

15. The multi-directional bending conveyor according to claim 14, characterized in that, The bending knob assembly also includes: The main force-applying plate is cylindrical and is sleeved on the screw. The main force-applying plate is threadedly connected to the knob so that the main force-applying plate rotates with the knob. The secondary force-applying plate, which is cylindrical, is sleeved outside the screw. The primary force-applying plate and the secondary force-applying plate are in contact with each other so that the secondary force-applying plate rotates when the primary force-applying plate rotates. The inner wall of the secondary force-applying plate is connected to the driving member so that the driving member rotates when the secondary force-applying plate rotates.

16. The multi-directional bending conveyor according to claim 15, characterized in that, Both the main force-applying plate and the secondary force-applying plate are friction plates; Optionally, both the main force-applying plate and the secondary force-applying plate are torsion gear plates, and the two torsion gear plates mesh with each other so that the secondary force-applying plate rotates following the main force-applying plate.

17. The multi-directional bending conveyor according to claim 15, characterized in that, The bending knob assembly also includes: A stop member, which is connected to the proximal end of the screw; and An elastic element is disposed between the end of the main force-applying plate away from the secondary force-applying plate and the retaining ring, so as to adjust the upper and lower limits of the bending force by adjusting the pressure of the elastic element on the main force-applying plate and the secondary force-applying plate, or the interaction force between the main force-applying plate and the secondary force-applying plate.

18. The multi-directional bending conveyor according to claim 17, characterized in that, The bending knob assembly also includes: A viewing window tube is fixedly connected to the screw and abuts against the bending knob; a third groove extending axially is provided inside the viewing window tube; and A bending indicator is engaged in the third groove, and the inner surface of the bending indicator is threadedly connected to the outer surface of the drive member so that the bending indicator moves axially when the drive member rotates.

19. A valve delivery system, characterized in that... include: The multi-directional bending conveyor according to any one of claims 1-18; and The release knob assembly is used to drive the outer tube to move axially relative to the bending tube, thereby retracting or releasing the valve; The release knob assembly includes: A knob connecting ring, which connects to the second vent valve; and The release knob is rotatably connected to the knob connecting ring at its distal end. When the release knob is subjected to an external force and moves axially, it drives the knob connecting ring to move axially, thereby driving the second vent valve and the outer pipe to move axially.

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