Multi-directional bending adjustment delivery device and valve delivery system

Abstract

A multi-directional bending adjustment delivery device (100) and a valve delivery system. The present invention relates to the technical field of medical instruments and devices. The multi-directional bending adjustment delivery device (100) comprises a catheter assembly (200). The catheter assembly (200) comprises a bending adjustment tube (210). The bending adjustment tube (210) comprises a bending adjustment portion (211) and a straightening portion (212) that are rotatably connected to each other. The bending adjustment portion (211) comprises a plurality of snake bone units (2111) connected end to end. One end of each of the snake bone units (2111) is provided with a pair of first connecting lugs (2113), and the other end is provided with a pair of second connecting lugs (2114). Adjacent snake bone units (2111) are pivotally connected to each other by means of the first connecting lugs (2113) and the second connecting lugs (2114). The included angle between the line connecting the centers of the two first connecting lugs (2113) and the line connecting the centers of the two second connecting lugs (2114) of the same snake bone unit (2111) is 0-90°.

Description

Multi-directional bending delivery device and valve delivery system TECHNICAL FIELD

[0001] The present application relates to the technical field of medical instrument equipment, in particular to a multi-directional bending delivery device and valve delivery system. BACKGROUND

[0002] Heart valve replacement surgery is to deliver the valve to the designated position through the delivery device and then release it to replace the original valve and ensure the normal function of the heart. As the key of heart valve replacement surgery, the structure and function of the delivery device play a great role in the convenience or success rate of the surgery. In the existing delivery device, the catheter can only bend in one direction or two directions in a two-dimensional plane. However, the heart blood vessels are complex and vary from person to person. The catheter bending in one direction or two directions has low flexibility, which is not conducive to positioning the valve at the lesion site by the delivery device, and is not conducive to the coaxial implantation of the valve, which causes certain limitations to the treatment process and may even cause secondary damage to the human body organs. SUMMARY

[0003] One object of the first aspect of the present application is to provide a multi-directional bending delivery device to solve the problem of low accuracy and efficiency of valve delivery to the designated position due to the catheter bending in one direction or two directions in a two-dimensional plane in the related art.

[0004] Another object of the first aspect of the present application is to solve the problem of poor safety of the delivery device in the related art.

[0005] An object of the second aspect of the present application is to provide a valve delivery system comprising the multi-directional bending delivery device.

[0006] In particular, the present application also provides a multi-directional bending delivery device, comprising a catheter assembly, the catheter assembly comprising a bending pipe, the bending pipe comprising a bending part and a straightening part connected to each other, the bending part comprising a plurality of snake bone units rotatably connected in sequence; each snake bone unit comprises a body, a pair of first connecting ears arranged at one end of the body in the axial direction, and a pair of second connecting ears arranged at the other end of the body in the axial direction; a pair of second connecting ears of a previous snake bone unit and a pair of first connecting ears of a subsequent snake bone unit are pivotally connected to each other, and the rotation axis extends along the radial direction of the body; the center lines of the two first connecting ears of the same pair and the center lines of the two second connecting ears of the same pair both pass through the center axis of the body, and the included angle between the center lines of the two first connecting ears and the two second connecting ears of the same snake bone unit is 0°-90° when projected on a preset plane, wherein the preset plane is a plane perpendicular to the axis of the body.

[0007] Optionally, at least one of the included angles is other than 0° or 90°.

[0008] Optionally, a first through hole is arranged at each of the first connecting ears, a second through hole is arranged at each of the second connecting ears, and the first connecting ear and the second connecting ear are clamped to each other, and then a fastener is simultaneously passed through the first through hole and the second through hole, so that the two adjacent snakebone units rotate around the fastener as the pivot.

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

[0010] Optionally, at least one end of the snakebone unit is configured to form a plane away from the center of the first connecting ear or the second connecting ear, and the plane is inclined to the body itself, and the plane is at a preset angle with the preset plane, and the preset angle is 0-90°, not including 0° and 90°.

[0011] Optionally, at least one end of the snakebone unit is configured to form a curved surface away from the center of the first connecting ear or the second connecting ear.

[0012] Optionally, at least one set of bending driving assembly is further included, and each set of the bending driving assembly includes a bending member, and the bending member is arranged at the outer wall or the inner wall of the snakebone unit.

[0013] Optionally, the bending member is arranged in a spiral shape.

[0014] Optionally, the bending member is arranged at the outer wall or the inner wall of the intermediate position or the position close to the intermediate position between the two first connecting ears or the two second connecting ears of one of the snakebone units.

[0015] Optionally, each of the bending driving assemblies further includes a plurality of connecting members, and the bending member is connected to the outer wall or the inner wall of the corresponding snakebone unit through the connecting members.

[0016] Optionally, at least one axially protruding first protrusion and at least one axially recessed first clamping groove are arranged at one end of the bending section close to the straightening section; at least one axially protruding second protrusion and at least one axially recessed second clamping groove are arranged at one end of the straightening section close to the bending section, and the bending section and the straightening section are connected to each other by the cooperation of the first protrusion and the first clamping groove, and the cooperation of the second protrusion and the second clamping groove.

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

[0018] Optionally, the catheter assembly further comprises an inner tube, the inner tube is arranged inside the bending tube, and the distal end of the inner tube is sealingly connected to the distal end of the bending tube, and the proximal end of the inner tube is in fluid communication with the first air evacuation valve to evacuate air in the inner tube through the first air evacuation valve.

[0019] Optionally, the catheter assembly further comprises an outer tube, the outer tube is arranged outside the bending tube, the distal end of the outer tube is in contact with the distal end of the inner tube, and the distal end of the outer tube and the distal end of the bending tube are sealed by a first sealing member, and a second air evacuation valve is arranged between the proximal end of the outer tube and the bending tube to evacuate air between the outer tube and the bending tube.

[0020] Optionally, the outer tube comprises a metal tube, and the metal tube comprises at least one axially extending rib.

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

[0022] Optionally, the outer tube further comprises at least one second polymer layer, and the at least one second polymer layer is arranged on the outer side of the metal tube.

[0023] Optionally, the catheter assembly further comprises a buffer tube, and the buffer tube is arranged outside the outer tube to serve as a buffer.

[0024] Optionally, the proximal end of the buffer tube is sealingly connected to the outer tube by a second sealing member, and a third air evacuation valve is arranged between the proximal end of the buffer tube and the outer tube to evacuate air between the buffer tube and the outer tube.

[0025] Optionally, a stress dispersion tube is further arranged between the proximal end of the buffer tube and the third air evacuation valve to form a buffer.

[0026] Optionally, a screw rod and a bending knob assembly are further included, the screw rod is sleeved outside the straightening part of the bending tube, one end of the screw rod is connected with the third exhaust valve, and the other end is connected with the first exhaust valve, and the screw rod is provided with an axially extending long hole;

[0027] The bending knob assembly includes:

[0028] a knob which is sleeved outside the screw rod and rotates under the action of an external force;

[0029] a driving member which is in a cylindrical structure, is sleeved outside the screw rod, and rotates with the knob, and is provided with a first groove in a spiral shape inside;

[0030] a bending connecting member which is fixedly connected with the proximal end of the bending member, is sleeved outside the straightening part, and has a first protruding part, the first protruding part passes through the long hole and cooperates with the first groove, so that when the driving member rotates, the bending connecting member moves axially along the bending tube, and then pulls the bending member to drive the bending tube to bend or straighten.

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

[0032] a main force applying piece which is in a cylindrical structure, is sleeved outside the screw rod, and is threadedly connected with the knob so as to rotate with the knob;

[0033] a slave force applying piece which is in a cylindrical structure, is sleeved outside the screw rod, and is in contact with the main force applying piece, so as to rotate with the main force applying piece when the main force applying piece rotates; and an inner wall of the slave force applying piece is in transmission connection with the driving member, so as to rotate the driving member when the slave force applying piece rotates.

[0034] Optionally, the main force applying piece and the slave force applying piece are both friction pieces;

[0035] Optionally, the main force applying piece and the slave force applying piece are both torsion teeth pieces, and the two torsion teeth pieces are in meshing with each other so as to rotate the slave force applying piece with the main force applying piece.

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

[0037] a stopper which is connected with the proximal end of the screw rod; and

[0038] a resilient member which is arranged between an end of the main force applying piece away from the slave force applying piece and a stop ring, so as to adjust the upper limit and the lower limit of the bending force by adjusting the pressure of the main force applying piece and the slave force applying piece or the interaction force between the main force applying piece and the slave force applying piece.

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

[0040] a window tube fixedly connected with the screw rod and abutting against the bending knob; the window tube is provided with a third groove extending in the axial direction; and

[0041] a bending indication piece clamped at the third groove, and an inner surface of the bending indication piece is threadedly connected with an outer surface of the driving piece, so that the bending indication piece moves in the axial direction when the driving piece rotates.

[0042] In particular, the application further provides a valve delivery system, comprising:

[0043] the multi-directional bending delivery device described above; and

[0044] a release knob assembly for driving the outer tube to move in the axial direction relative to the bending tube, so as to accommodate or release the valve;

[0045] the release knob assembly comprises:

[0046] a knob connecting ring connected with the second emptying valve; and

[0047] a release knob, a distal end of which is rotatably connected with the knob connecting ring, and when the release knob is driven to move in the axial direction by an external force, the knob connecting ring is driven to move in the axial direction, and in turn drives the second emptying valve and the outer tube to move in the axial direction.

[0048] The above and other objects, advantages and features of the application will become more apparent from the following detailed description of some embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0049] Some specific embodiments of the application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the drawings:

[0050] FIG. 1 is a structural schematic view of a delivery device according to one specific embodiment of the application;

[0051] FIG. 2 is a partially exploded structural schematic view of a delivery device according to one specific embodiment of the application;

[0052] FIG. 3 is a structural schematic view of one angle of a bending tube of a delivery device after three-dimensional bending according to one specific embodiment of the application;

[0053] FIG. 4 is a structural schematic view of another angle of a bending tube of a delivery device after three-dimensional bending according to one specific embodiment of the application;

[0054] Fig. 5 is another angle of a structure diagram of a three-dimensional bending of a bending tube of a delivery device according to an embodiment of the present application;

[0055] Fig. 6 is a partial structure diagram of a bending portion of a bending tube according to an embodiment of the present application;

[0056] Fig. 7 is a partial structure diagram of a bending portion of a bending tube according to an embodiment of the present application;

[0057] Fig. 8 is a schematic structure diagram of a serpentine unit of a bending tube according to an embodiment of the present application;

[0058] Fig. 9 is a partial structure diagram of a bending portion of a bending tube according to an embodiment of the present application;

[0059] Fig. 10 is a partial structure diagram of a bending portion of a bending tube according to another embodiment of the present application;

[0060] Fig. 11 is a partial structure diagram of a bending portion of a bending tube according to another embodiment of the present application;

[0061] Fig. 12 is a partial structure diagram of a bending portion of a bending tube according to another embodiment of the present application;

[0062] Fig. 13 is an enlarged partial view of Fig. 12;

[0063] Fig. 14 is a partial structure diagram of a connection between a bending portion and a straightening portion of a bending tube according to an embodiment of the present application;

[0064] Fig. 15 is a partial structure diagram of an outer tube according to an embodiment of the present application;

[0065] Fig. 16 is an enlarged partial view of an outer tube according to an embodiment of the present application;

[0066] Fig. 17 is a partial exploded structure diagram of a delivery device according to an embodiment of the present application;

[0067] Fig. 18 is an exploded structure diagram of a bending knob assembly of a delivery device according to an embodiment of the present application;

[0068] Fig. 19 is a partial exploded structure diagram of a bending knob assembly of a delivery device according to an embodiment of the present application;

[0069] Fig. 20 is a structure diagram of a knob of a bending knob assembly according to an embodiment of the present application;

[0070] Fig. 21 is a structural diagram of a driving member of a bending knob assembly according to one embodiment of the present application;

[0071] Fig. 22 is a structural diagram of a delivery device before a valve is pressed according to one embodiment of the present application;

[0072] Fig. 23 is a structural diagram of a delivery device after a valve is pressed according to one embodiment of the present application;

[0073] Fig. 24 is a structural diagram of a delivery device reaching a designated position according to one embodiment of the present application;

[0074] Fig. 25 is a structural diagram of a delivery device incompletely releasing a valve according to one embodiment of the present application;

[0075] Fig. 26 is a structural diagram of a delivery device completely releasing a valve according to one embodiment of the present application;

[0076] Fig. 27 is a structural diagram of a delivery device completely releasing a valve and being taken out according to one embodiment of the present application.

[0077] Explanation of Reference Numerals:

[0078] Multi-directional bending delivery device - 100;

[0079] Catheter assembly - 200; bending tube - 210; bending portion - 211; snake unit - 2111; body - 2112; first connecting ear - 2113; second connecting ear - 2114; first through hole - 2115; second through hole - 2116; first protrusion - 2117; first clamping groove - 2118; rivet - 2119; straightening portion - 212; first rib - 2121; second rib - 2122; second protrusion - 2123; second clamping groove - 2124; top ring - 213;

[0080] Inner tube - 220; tip - 221;

[0081] 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;

[0082] Bending driving assembly - 300; connecting member - 310; fixing hole - 311; bending member - 320;

[0083] First emptying valve - 400; second emptying valve - 500;

[0084] Release knob assembly - 600; release knob - 610; protrusion - 611; knob connecting ring - 650; groove 651; connecting ring cover - 660;

[0085] Third emptying valve-700; handle-800; screw rod-810; external thread-811; long hole 812;

[0086] Bending knob assembly-900; knob-910; third clamping groove-911; driving piece-920; first recess-921; fourth clamping groove-922; second recess-923; bending connecting piece-930; first protruding part-931; main force piece-940; third protrusion-941; slave force piece-950; fourth protrusion-951; check ring-960; spring-970; window barrel-980; third recess-981; bending indicator-990; second protruding part-991;

[0087] Valve-1000. DETAILED DESCRIPTION

[0088] In the description of the present embodiment, it should be understood that the terms "length", "width", "height", "upper", "lower", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0089] As a specific embodiment of the present application, as shown in FIGS. 1-5, the present embodiment provides a multi-directional bending conveyor 100, which can include a catheter assembly 200, the catheter assembly 200 can include a bending tube 210, the bending tube 210 can include a bending part 211 and a straightening part 212 connected to each other, the bending part 211 can include a plurality of serpentine units 2111 rotatably connected in sequence, each serpentine unit 2111 can include a body 2112, a pair of first connecting ears 2113 arranged at one end of the body 2112 in the axial direction, and a pair of second connecting ears 2114 arranged at the other end of the body 2112 in the axial direction. The pair of second connecting ears 2114 of the previous serpentine unit 2111 and the pair of first connecting ears 2113 of the next serpentine unit 2111 are pivotally connected to each other, and the rotation axis extends along the radial direction of 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 center axis of the body 2112, and the included angle α between the line x connecting the centers of the two first connecting ears 2113 and the line y connecting the centers of the two second connecting ears 2114 of the same serpentine unit 2111 is 0°-90° when projected on a preset plane, wherein the preset plane is a plane perpendicular to the axis of the body 2112.

[0090] Specifically, the multi-directional bending conveyor 100 of the embodiment can include a conduit assembly 200, which can include a bending conduit 210, the bending conduit 210 can include a bending part 211 and a straightening part 212 connected to each other, the bending part 211 can include a plurality of serpentine units 2111 rotatably connected in sequence. One end of each serpentine unit 2111 is provided with a first connecting lug 2113, and the other end is provided with a second connecting lug 2114, which are pivotally connected to each other by the first connecting lug 2113 and the second connecting lug 2114. And the angle α between the center line x of the two first connecting lugs 2113 and the center line y of the second connecting lug 2114 of the same serpentine unit 2111 of the embodiment is 0°-90°, by selecting different angle α, the bending conduit 210 can be bent to the required angle and position according to the requirements, so as to realize three-dimensional bending, meet the requirements of different bending, and further improve the accuracy and efficiency of the valve positioning device 100 to position the valve to the lesion site.

[0091] Specifically, the cross section of the body 2112 of the embodiment is circular, oval, square, etc. And the length of each body 2112 in the axial direction can be adjusted, and the axial length of the body 2112 of different serpentine units 2111 can be the same or different, which can be designed according to actual conditions.

[0092] Specifically, in the embodiment, the angle α can be 0°, 30°, 60°, 70°, 80° or 90°. Specifically, in the embodiment, the angle α of different serpentine units 2111 can be the same or different, and the specific angle α can be selected as needed. When the angle α of all serpentine units 2111 is 0° or 90°, the bending part 211 of the bending conduit 210 is bent towards a two-dimensional plane. When the angle α of the serpentine unit 2111 is not equal to 0° or not equal to 90°, the bending part 211 can be bent towards a three-dimensional space direction.

[0093] More specifically, before the operation, the heart to be operated can be understood and analyzed, and then the bending pipe 210 consistent with the blood vessel of the heart can be customized. For example, if the blood vessel is two-dimensional bending in the first segment, three-dimensional bending in the second segment, two-dimensional bending in the third segment, and three-dimensional bending in the fourth segment from the proximal end to the distal end. When designing the bending part 211, the above-mentioned included angle α of each snake unit 2111 near the straightening part 212 can be designed as 90° or 0°, and then the segment is bent towards the plane perpendicular to the line connecting the centers of the two first connecting ears 2113 of the snake unit 2111, or towards the plane perpendicular to the line connecting the centers of the two second connecting ears 2114 of the snake unit 2111, and the second segment is rotatably connected by a plurality of snake units 2111 with at least one included angle α not being 90° or 0°, thereby achieving three-dimensional bending, and the third segment is rotatably connected by a plurality of snake units 2111 with all included angles α being 90° or 0°, thereby achieving two-dimensional bending. The fourth segment is rotatably connected by a plurality of snake units 2111 with at least one included angle α not being 90° or 0°, thereby achieving three-dimensional bending, and thereby obtaining the bending part 211 consistent with the blood vessel of the heart. Thus, the valve can be smoothly delivered to the specified position during the operation, improving the accuracy and efficiency. Finally, after designing the angle of the two connecting ears of each snake unit 2111 of the bending part 211 of the bending pipe 210, the bending part 211 is bent, and the bending part 211 is bent as shown in FIGS. 3-5.

[0094] Unless otherwise specified, the proximal end of the present application refers to the direction close to the operator, and the distal end refers to the direction away from the operator. The two-dimensional bending of the present application refers to the bending of the bending part 211 in a two-dimensional plane and each snake unit 2111 is in the same two-dimensional plane. Three-dimensional bending refers to the bending of the bending part 211 in three-dimensional space and at least two snake units 2111 are in different two-dimensional planes.

[0095] As a specific embodiment of the present application, each first connecting ear 2113 of the present embodiment 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 clamped with each other, the fastener simultaneously passes through the first through hole 2115 and the second through hole 2116, so that the two adjacent snake units 2111 rotate around the fastener as the rotation shaft.

[0096] Specifically, the second connecting ear 2114 of the previous snake unit 2111 and the first connecting ear 2113 of the next snake unit 2111 are connected by the fastener, thereby connecting the two adjacent snake units 2111, so that the snake unit 2111 rotates around the rotation shaft perpendicular to the central axis. The fastener can be a rivet 2119, a screw or a bolt, or other structures that can connect two components with each other, which is not limited here.

[0097] As a specific embodiment of the present application, the first connecting lug 2113 of the present embodiment protrudes from the body 2112 in both the radial direction and the axial direction, and the second connecting lug 2114 protrudes from the body 2112 in the axial direction and is recessed in the body 2112 in the radial direction.

[0098] Alternatively, as another specific embodiment of the present application, as shown in FIG. 8, the first connecting lug 2113 of the present embodiment protrudes from the body 2112 in the axial direction and is recessed in the body 2112 in the radial direction, and the second connecting lug 2114 protrudes from the body 2112 in both the radial direction and the axial direction.

[0099] Of course, as other embodiments, the first connecting lug 2113 and the second connecting lug 2114 of the present embodiment can also be other structures that can achieve rotatable connection.

[0100] Specifically, the structures of the first connecting lug 2113 and the second connecting lug 2114 described above can be selected as needed.

[0101] The first connecting lug 2113 and the second connecting lug 2114 are designed in such a structure mainly to enable the first connecting lug 2113 and the second connecting lug 2114 to be clamped to each other when the snake bone units 2111 are connected to each other, and to not occupy too much space.

[0102] Specifically, in the present embodiment, in order to ensure that the snake bone units 2111 can rotate around the connecting lug, the connecting lug can be designed in a circular arc shape or a circular shape.

[0103] As a specific embodiment of the present application, as shown in FIG. 9, the planes a where the two end portions of the two adjacent snake bone units 2111 are located are parallel to a preset plane b after the two adjacent snake bone units 2111 are pivotally connected. Moreover, the center of the first through hole 2115 protrudes from the end portion where the first through hole 2115 is located, and / or the center of the second through hole 2116 protrudes from the end portion where the second through hole 2116 is located, so that a preset distance n is left between the two end portions close to each other after the two adjacent snake bone units 2111 are pivotally connected. The preset plane is a plane perpendicular to the axial direction of the body 2112.

[0104] Specifically, since the end portions of the snake bone units 2111 are flat structures, in order to ensure that the snake bone units 2111 can rotate relative to each other, a certain distance needs to be left between the end portions of the two adjacent snake bone units 2111. Preferably, the center of at least one of the two through holes needs to be outside the end portion, so as to ensure that the snake bone units 2111 can rotate relative to each other.

[0105] Specifically, the angle of rotation between two adjacent snake bone units 2111 in the embodiment is related to the value of the preset distance n, and the greater the preset distance n, the greater the angle of rotation. Therefore, the angle of rotation can be adjusted by adjusting the preset distance n. The preset distances n between the plurality of snake bone units 2111 in the bending part 211 can be different, and different preset distances n can make the bending part 211 form shapes with different bending radii, so that more blood vessel paths can be flexibly adapted.

[0106] As another specific embodiment of the present application, as shown in FIGS. 10 and 11, at least one end of the snake bone unit 2111 in the embodiment is configured to be inclined to the body 2112 itself by a preset angle c formed by the center of the connecting ear to a plane away from the center position, and the preset plane b is perpendicular to the axial direction of the body 2112, and the preset angle is 0-90°, specifically, the angle does not include 0° or 90°.

[0107] Specifically, in the embodiment, the center of the connecting ear (the first connecting ear 2113 or the 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, when the two adjacent snake bone units 2111 rotate relative to each other, the inclined surface of the end can have a certain rotation space.

[0108] Specifically, in the embodiment, the angle of rotation between two adjacent snake bone units 2111 is related to the preset angle c, and the greater the preset angle c, the greater the angle of rotation. Therefore, the angle of rotation can be adjusted by adjusting the preset angle c. Of course, the preset angles c between different snake bone units 2111 can be designed to be different, and different preset angles c can make the bending part 211 form shapes with different bending radii, so that more blood vessel paths can be flexibly adapted.

[0109] In the embodiment, FIG. 10 shows that at the same bending part 211, one end of the relative end of part of the two adjacent snake bone units 2111 is formed as a plane, and the other end is formed as an inclined surface. The two ends of part of the two adjacent snake bone units 2111 are both inclined surfaces. FIG. 11 shows that at the same bending part 211, the relative ends of part of the two adjacent snake bone units 2111 are both formed as planes, and the two ends of part of the two adjacent snake bone units 2111 are both inclined surfaces. Specifically, the embodiments of the present application cannot be exhausted, and similar modifications are within the protection scope of the present application.

[0110] As a specific embodiment of the present application, at least one end of the snake bone unit in the embodiment is configured to be formed as an arc surface by the center of the first connecting ear 2113 or the second connecting ear 2114 away from the center position.

[0111] Through the arc surface design, a rotating space can be formed between the snake bone units 2111, so as to ensure that the two adjacent snake bone units 2111 can rotate relative to each other. The shape of the arc surface at the end of each snake bone unit 2111 can be designed to be the same or different. Different arc surfaces can make the bending part 211 form a shape with different bending radii, so that more blood vessel directions can be flexibly adapted.

[0112] As a specific embodiment of the present application, as shown in FIGS. 6, 7, 12 and 13, the multi-directional bending conveyor 100 of the present embodiment can further include at least one set of bending driving assembly 300, and each set of bending driving assembly 300 can include a bending member 320 connected at the outer wall (as shown in FIGS. 6 and 7) or the inner wall (as shown in FIGS. 12 and 13) of the snake bone unit 2111.

[0113] Specifically, the bending member 320 can be a bending wire. The bending wire is arranged along the bending part 211, so as to drive the bending part 211 to bend.

[0114] In one embodiment, the bending part 211 can be driven by a set of bending driving assembly 300. Specifically, a bending wire is used to drive the bending part 211 to bend in three-dimensional directions.

[0115] In other embodiments, the bending part 211 can be driven by at least two bending driving assemblies 300, so that the bending part 211 can be bent in three-dimensional directions through the cooperation of multiple bending wires.

[0116] Preferably, if the bending part 211 is spirally bent in three-dimensional directions, the bending member 320 is also spirally arranged on the bending part, so that the bending part 211 can be bent along the plane where the axis of the bending member 320 and the bending part 211 is located.

[0117] Specifically, the bending member 320 is arranged at the outer wall or the inner wall of 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.

[0118] Preferably, the bending member 320 is arranged at the middle of the two first connecting ears 2113 or the middle of the two second connecting ears 2114, so as to achieve the purpose of driving the bending part 211 to bend with smaller force.

[0119] As a specific embodiment of the present application, each set of the bending adjustment driving assembly 300 can include a plurality of connecting members 310, through which the bending adjustment member 320 is connected to the outer wall or the inner wall of the corresponding serpentine unit 2111. Specifically, each connecting member 310 is provided with a fixing hole 311 through which the bending adjustment member 320 passes and is fixed, and each connecting member 310 is arranged at the outer wall or the inner wall between the two first connecting ears 2113 of one of the serpentine units 2111 or at the inner wall or the outer wall between the two second connecting ears 2114 of the serpentine unit 2111. As a specific embodiment of the present application, the two adjacent serpentine units 2111 provided with the connecting member 310 in the bending tube 210 of the present embodiment are spaced apart by at least one serpentine unit 2111, and the number of the spaced-apart serpentine units 2111 is preferably odd.

[0120] Specifically, at least one serpentine unit 2111 is arranged between the two adjacent serpentine units 2111 provided with the connecting member 310 in the present embodiment in order to avoid the rotation angle of the two adjacent serpentine units 2111 being too large, which causes the bending adjustment member 320 to work inconveniently. In the present embodiment, the number of the serpentine units 2111 spaced apart between the two adjacent serpentine units 2111 provided with the connecting member 310 is one, so that the bending of the bending tube 210 can be accurately controlled.

[0121] As a specific embodiment of the present application, the straightening portion 212 of the present embodiment can include at least one rib extending along the axial direction of the bending tube 210.

[0122] As one of the embodiments, when the number of the ribs is only one, the rib spirals along the circumferential direction and extends along the axial direction to form the bending tube 210. The hardness of the bending tube 210 can be adjusted by adjusting the size, material or spiral density of the rib.

[0123] As another specific embodiment, as shown in FIG. 14, the rib specifically includes a plurality of first ribs 2121 extending along the axial direction of the bending tube 210 and a plurality of second ribs 2122 extending along the circumferential direction of the bending tube 210, and the first ribs 2121 and the second ribs 2122 are connected to each other.

[0124] Specifically, the number of the first ribs 2121 at the straightening portion 212 of the present embodiment can be two and oppositely arranged. In other embodiments, the number of the first ribs 2121 can be multiple, each first rib 2121 is parallel to the axis of the straightening portion 212, and the multiple first ribs 2121 are uniformly arranged in the circumferential direction.

[0125] In other embodiments, the straightening portion 212 can be composed of more ribs of different shapes and different arrangements, or can be formed by the combination of the ribs of the above-mentioned embodiments and the ribs of other embodiments.

[0126] As a specific embodiment of the present application, the bending adjusting member 320 is located at the straightening portion 212 and the wire outlet is close to one of the first ribs 2121.

[0127] Specifically, since the bending adjusting member 320 needs to be pulled to apply force on the bending pipe 210, the bending portion 211 of the bending pipe 210 needs to be pulled to bend, and the straightening portion 212 cannot be bent. Therefore, the bending adjusting member 320 needs to be at the first rib 2121 to avoid the straightening portion 212 being bent by the bending adjusting member 320. In addition, in order to avoid the straightening portion 212 being bent, the opposite side of the bending adjusting member 320 also needs to have a first rib 2121. In other embodiments, in consideration of the hardness of the straightening portion 212, the more the number of first ribs 2121, the better. However, too many first ribs 2121 will affect the overall weight of the structure. Therefore, the number of first ribs 2121 can be designed according to specific circumstances. In the present embodiment, the number of first ribs 2121 is selected to be 2, which are symmetrically distributed.

[0128] As a specific embodiment of the present application, as shown in FIG. 14, the bending portion 211 of the present embodiment is provided with at least one first protrusion 2117 protruding in the axial direction and at least one first clamping groove 2118 recessed in the axial direction at one end close to the straightening portion 212. The straightening portion 212 is provided with at least one second protrusion 2123 protruding in the axial direction and at least one second clamping groove 2124 recessed in the axial direction at one end close to the bending portion 211, and the bending portion 211 and the straightening portion 212 are connected to each other through the cooperation of the first protrusion 2117 and the first clamping groove 2118, and the second protrusion 2123 and the second clamping groove 2124.

[0129] The bending portion 211 and the straightening portion 212 of the present embodiment are connected together firmly through the cooperation of the first clamping groove 2118 and the first protrusion 2117, and the second clamping groove 2124 and the second protrusion 2123.

[0130] As a specific embodiment of the present application, the bending pipe 210 of the present embodiment can further include a first polymer layer arranged outside the bending portion 211 and the straightening portion 212.

[0131] Specifically, the first polymer layer of the present embodiment can fill the gaps between the bending portion 211 and the straightening portion 212 to achieve a sealing effect. As another embodiment, the first polymer layer can also be wrapped outside the bending pipe 210. However, since the polymer layer is flexible, it can move with the bending portion 211.

[0132] Specifically, the material of the first polymer layer of the present embodiment is selected from one of PE, nylon, or polyurethane.

[0133] Specifically, the distal end of the bent tube 210 (the left side in the figure is the distal end, and the right side is the proximal end) of the embodiment can further include a top ring 213. The top ring 213 is specifically connected to the end of the bent portion 211 away from the straight portion 212. The top ring 213 is used to connect the valve.

[0134] As a specific embodiment of the present application, as shown in FIG. 2, the catheter assembly 200 of the embodiment can further include an inner tube 220, which is arranged inside the bent tube 210, and the distal end of the inner tube 220 is sealingly connected to the distal end of the bent tube 210, and the proximal end of the inner tube 220 is fluidly connected to the first evacuation valve 400 to evacuate the air in the inner tube 220 through the first evacuation valve 400.

[0135] Specifically, the inner tube 220 of the embodiment is arranged in the bent tube 210, and the distal end protrudes from the distal end of the bent tube 210. The distal end of the inner tube 220 is connected to a tip 221. Specifically, the top ring 213 at the distal end of the bent tube 210 is also connected to the inner tube 220, and the valve is connected between the tip 221 and the top ring 213 outside the inner tube 220.

[0136] As a specific embodiment of the present application, as shown in FIG. 2, FIG. 15 and FIG. 16, the catheter assembly 200 of the embodiment can further include an outer tube 230, which is arranged outside the bent tube 210, the distal end of the outer tube 230 is in contact with the distal end of the inner tube 220, and the distal end of the outer tube 230 and the distal end of the bent tube 210 are sealed by a first seal (not shown in the figure), and the proximal end of the outer tube 230 and the bent tube 210 are provided with a second evacuation valve 500 to evacuate the space between the outer tube 230 and the bent tube 210.

[0137] Specifically, the first seal of the embodiment can be a sealing ring or other sealing structure.

[0138] As a specific embodiment of the present application, the outer tube 230 of the embodiment can include a metal tube, which can include at least one rib extending along the axial direction of the metal tube.

[0139] As one of the embodiments, the number of the rib is one, which spirally extends along the circumferential direction and extends along the axial direction to form the metal tube. The hardness of the bent tube 210 is adjusted by adjusting the size, material or spiral density of the rib.

[0140] As another specific embodiment, as shown in FIG. 15 and FIG. 16, the rib in this embodiment can include a third rib 231 extending along the axial direction of the metal tube and a plurality of fourth ribs 232 extending along the circumferential direction of the metal tube, and the third rib 231 and the fourth rib 232 are connected to each other.

[0141] Specifically, the metal tube of the outer tube 230 in the embodiment is composed of a plurality of ribbons, which can meet the rigidity requirement and reduce the weight.

[0142] Specifically, the metal tube in the 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. The size of the middle section 234 matches the size of the bending part 211 to follow the bending part 211 to bend.

[0143] Specifically, when the metal tube is a spiral of one ribbon, the flexibility of different sections can be formed by adjusting the size, material or the density of the spiral to meet the requirement.

[0144] When the metal tube is composed of the third ribbons 231 and the fourth ribbons 232, the thickness of the fourth ribbons 232 of the middle section 234 and the gap between the adjacent two fourth ribbons 232 are all smaller than those of the front section 233 and the rear section 235.

[0145] Of course, as other embodiments, the metal tube can be composed of more ribbons with different shapes and / or different arrangements. The ribbons in the above two embodiments can also be combined with the ribbons in other embodiments to form one section of the metal tube.

[0146] Specifically, the outer tube 230 in the embodiment mainly supports and protects the inner tube 220 and the bending tube 210. Since the bending part 211 of the bending tube 210 needs to be three-dimensionally bent, the position of the outer tube 230 corresponding to the bending part 211 also needs to move together with the bending part 211. The other positions of the metal tube need to correspond to the other positions of the bending tube 210, which shows a certain rigidity. The middle section 234 of the metal tube in the embodiment is the section of the tube corresponding to the bending part 211, and the front section 233 and the rear section correspond to the other sections of the tube. 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 the interval of the fourth ribbons 232 of the middle section 234 are different from those of the front section 233 and the rear section 235. Specifically, the number of the third ribbons 231 of the middle section 234 is only one, the fourth ribbons 232 are thinner, and the interval between the adjacent fourth ribbons 232 is smaller. The number of the third ribbons 231 of the front section 233 and the rear section 235 is at least two, the fourth ribbons 232 are thicker, and the interval between the adjacent fourth ribbons 232 is larger.

[0147] As a specific embodiment of the present application, the third rib 231 of the present embodiment is parallel to the axis of the metal tube. In order to ensure that the metal tube at the middle section 234 can follow the bending of the bending tube 210, the number of the third rib 231 at the middle section 234 can be designed to be only one.

[0148] As another specific embodiment of the present application, since the metal tube at the middle section 234 needs to follow the bending of the bending tube 210, the third rib 231 at the middle section 234 of the present embodiment is parallel to the bending member 320.

[0149] Since the rear section 235 of the metal tube of the present embodiment corresponds to the straight section 212 of the bending tube 210, at the straight section 212, the pipe does not need to be bent, therefore, in order to avoid the force of the bending member 320 on the straight section 212 and the rear section 235 when pulling the bending section 211 to bend, the first rib 2121, the third rib 231 and the bending member 320 of the present embodiment are close to each other and in the same plane.

[0150] As a specific embodiment of the present application, the outer tube 230 of the present embodiment can further comprise at least one second polymer layer, and the at least one second polymer layer is arranged on the outside of the metal tube. Optionally, the material of the second polymer layer is selected from one of PE, nylon, polytetrafluoroethylene and polyurethane.

[0151] Specifically, the second polymer layer of the present embodiment can comprise one or more layers. When the second polymer layer is one layer, it is designed on the outside of the metal tube. When the second polymer layer is two layers, at least one of the two layers is arranged on the outside of the metal tube. For example, one second polymer layer is arranged on the outside of the metal tube, and one second polymer layer is designed on the inside of the metal tube. Alternatively, both of the two second polymer layers are arranged on the outside of the metal tube. Of course, the metal tube of the present embodiment is provided with three second polymer layers, wherein one layer of the second polymer layer is arranged on the inside of the metal tube, and two layers of the second polymer layer are arranged on the outside of the metal tube. Specifically, the inside of the metal tube of the present embodiment can be provided with one layer of modified PTFE layer, so as to have a lower friction coefficient, which is beneficial to the release of the valve. The outer layer of the metal tube can be two layers of TPU layers with different hardness, so that the outer tube has a wider application range.

[0152] As a specific embodiment of the present application, the outer tube 230 of the present embodiment can not only play a protective and covering role on the bending tube 210, but also can press or release the valve when moving relative to the bending tube and the inner tube.

[0153] Specifically, as shown in FIG. 17, the release knob assembly 600 is arranged at the proximal end of the outer tube 230, and the second evacuation valve 500 is arranged at the release knob assembly 600.

[0154] Specifically, the release knob assembly 600 of the present embodiment can include a release knob 610, a knob connecting ring 650, and a connecting ring sleeve 660.

[0155] The second evacuation valve 500, the knob connecting ring 650, and the connecting ring sleeve 660 are arranged at the distal end of the release knob 610.

[0156] Specifically, the second evacuation valve 500 of the present embodiment is fixedly connected with the outer tube 230, and the second evacuation valve 500 is connected with the knob connecting ring 650, the connecting ring sleeve 660 is sleeved outside the knob connecting ring 650, and the proximal end of the knob connecting ring 650 is provided with a groove 651 along the circumference. The distal end of the release knob 610 is provided with a protrusion 611 matched with the groove 651, and the protrusion 611 is clamped at the groove 651. At this time, the release knob 610 is axially moved to drive the second evacuation valve 500 to move axially, and then the outer tube 230 is axially moved, so as to achieve the purpose of clamping and releasing the valve.

[0157] Before the operation, the release knob assembly 600 drives the outer tube 230 to expose the distal end of the inner tube 220, and after the valve 1000 is arranged between the tip 221 of the inner tube 220 and the top ring 213, the release knob 610 of the release knob assembly 600 drives the knob connecting ring 650 to drive the second evacuation valve 50 to move, and then the outer tube 230 is moved to sleeve the valve 1000, at this time the valve 1000 is located at the front section 233 of the outer tube 230. Normally, when the valve 1000 is delivered to the designated position during the operation, the valve 1000 needs to be slowly released, at this time the release knob 610 needs to be rotated to drive the outer tube 230 to move proximally, and the valve 1000 is slowly released. When the operation is completed and the valve 1000 is released, the outer tube 230 is prevented from causing damage to the blood vessel.

[0158] As a specific embodiment of the present application, as shown in FIG. 2, the catheter assembly 200 of the present embodiment can further include a buffer tube 240 sleeved outside the outer tube 230 to play a buffering role. The distal end of the buffer tube 240 is sealed with the outer tube 230 by a second sealing member (not shown in the figure), and the proximal end of the buffer tube 240 is provided with a third evacuation valve 700 between the outer tube 230 to exhaust the air between the buffer tube 240 and the outer tube 230.

[0159] Specifically, the buffer tube 240 of the present embodiment is mainly a high polymer material. It is sleeved outside the outer tube 230, and mainly avoids the outer tube 230 from damaging human organs when moving, and plays a role in protecting human organs.

[0160] As a specific embodiment of the present application, as shown in FIG. 2, the catheter assembly 200 of the present embodiment can further comprise a stress dispersion tube 250 arranged between the proximal end of the buffer tube 240 and the third exhaust valve 700 to form a buffer.

[0161] Specifically, the stress dispersion tube 250 can be made of PEBAX (block polyether amide resin), which mainly plays a role in stress dispersion when the buffer tube 240 is subjected to a large force and deforms greatly, thereby avoiding damage to the buffer tube 240.

[0162] Specifically, the present embodiment is provided with a handle 800 at one end of the stress dispersion tube 250, and a screw rod 810 is arranged in the handle 800, and the handle 800 is fixedly connected with the screw rod 810. An external thread 811 is arranged at the middle position of the screw rod 810, and the release knob assembly 600 is arranged at the external thread 811.

[0163] The screw rod 810 is sleeved outside the straightening portion 212 of the bending tube 210 and the rear section 235 of the outer tube 230, and the bending tube 210 passes through the distal end of the screw rod 810 into the screw rod 810 to the proximal end of the screw rod 810. The outer tube 230 passes through the distal end of the screw rod 810 into the screw rod 810 to the release knob assembly 600, and the outer tube 230 is pushed to move along the axial direction of the screw rod 810 by cooperating with the external thread 811 outside the screw rod 810 through the release knob assembly 600.

[0164] Specifically, the proximal end of the screw rod 810 is connected with the third exhaust valve 700, and the distal end is connected with the first exhaust valve 400.

[0165] Specifically, the screw rod 810 is provided with an axially extending long hole 812 at the side wall near the proximal end.

[0166] As a specific embodiment of the present application, the multidirectional bending conveyor 100 of the present embodiment can further comprise a bending knob assembly 900. Specifically, as shown in FIGS. 18-21, the bending knob assembly 900 of the present embodiment can comprise a knob 910, a driving member 920 and a bending connecting member 930. Specifically, the knob 910 of the present embodiment is sleeved outside the screw rod 810 and rotates under the action of an external force. The driving member 920 is a cylindrical structure, which is sleeved outside the screw rod 810 and rotates with the knob 910, and the driving member 920 is provided with a first helical groove 921 inside. The bending connecting member 930 is fixedly connected with one end of the bending member 320, and the bending connecting member 930 is sleeved outside the straightening portion 212 and has a first protruding portion 931, and the first protruding portion 931 passes through the long hole 812 and cooperates with the first helical groove 921, so that when the driving member 920 rotates, the bending connecting member 930 moves along the axial direction of the middle tube, thereby pulling the bending member 320 to bend or straighten the bending tube 210.

[0167] Specifically, the embodiment drives the driving member 920 to rotate by rotating the knob 910, and then drives the bending connecting member 930 to move along the axis, the bending connecting member 930 is connected with one end of the bending member 320, which ensures that the bending connecting member 930 drives one end of the bending member 320 to move along the axis, and then makes the bending member 320 drive the bending part 211 to bend or straighten.

[0168] As a specific embodiment of the present application, the knob 910 (as shown in FIG. 20) of the embodiment is provided with a third clamping groove 911. The outer wall of the driving member 920 is also provided with a fourth clamping groove 922 (as shown in FIG. 21). The bending knob assembly 900 can also include a main force piece 940 and a slave force piece 950. Among them, the main force piece 940 is cylindrical, which is sleeved outside the screw rod 810, and the outer wall of the main force piece 940 is provided with a third protrusion 941 matched with the third clamping groove 911, so as to follow the rotation of the knob 910. The slave force piece 950 is cylindrical, which is sleeved outside the screw rod 810, and the main force piece 940 and the slave force piece 950 are in contact with each other, so as to drive the slave force piece 950 to rotate when the main force piece 940 rotates. The inner wall of the slave force piece 950 is provided with a fourth protrusion 951 matched with the fourth clamping groove 922, so as to drive the driving member 920 to rotate when the slave force piece 950 rotates.

[0169] The embodiment drives the main force piece 940 and the slave force piece 950 to rotate by the knob 910, and then drives the driving member 920 to rotate by the slave force piece 950, and then drives the bending connecting member 930 to move along the axis of the bending pipe 210, and then makes the bending member 320 drive the bending part 211 to bend or straighten.

[0170] As a specific embodiment of the present application, the main force piece 940 and the slave force piece 950 of the embodiment are both friction pieces. And when in action, the two friction pieces abut against each other and have a certain relative friction force. So that the main force piece 940 can drive the slave force piece 950 to rotate. Of course, in the process of rotation, if the applied force is greater than the friction force between the two friction pieces, the phenomenon of slipping will appear, which avoids the torque generated by excessive operation, on the one hand, protects the bending member 320 from being damaged, and on the other hand, avoids the additional damage to the blood vessels caused by excessive bending, and has good safety performance.

[0171] As another specific embodiment of the present application, as shown in FIGS. 18 and 19, the main force piece 940 and the slave force piece 950 of the embodiment are both torsion teeth pieces, and the two torsion teeth pieces are engaged with each other to make the slave force piece 950 follow the rotation of the main force piece 940.

[0172] Similarly, in action, the two torsion teeth are engaged with each other and have a certain extrusion force, so that the main force piece 940 can drive the slave force piece 950 to rotate. Of course, in the process of rotation, if the applied force is greater than the force between the two torsion teeth, the phenomenon of slipping will occur, avoiding the torque generated by excessive operation, on the one hand, protecting the bending member 320 from being damaged, and on the other hand, avoiding additional damage to the blood vessel caused by excessive bending, good safety performance.

[0173] The present embodiment takes the main force piece 940 and the slave force piece 950 as torsion teeth as an example for description.

[0174] As a specific embodiment of the present application, as shown in FIG. 18, the bending knob assembly 900 of the present embodiment can further include a check ring 960 and a spring 970. The check ring 960 is connected with the proximal end of the screw rod 810. The spring 970 is arranged between the end of the main force piece 940 away from the slave force piece 950 and the check ring 960.

[0175] Specifically, no matter whether the main force piece 940 and the slave force piece 950 are friction plates or torsion teeth, the force when they directly abut against each other can be applied by the spring 970.

[0176] When the main force piece 940 and the slave force piece 950 are torsion teeth, and the force between them is greater than the pressure of the spring 970 applied to the main force piece 940, the torsion teeth will slip, so that the critical force between the main force piece 940 and the slave force piece 950 when they slip can be adjusted by adjusting the elastic force of the spring 970, thereby effectively protecting the blood vessel.

[0177] As a specific embodiment of the present application, the outer surface of the driving member 920 is further provided with a second spiral groove 923.

[0178] Specifically, the bending knob assembly 900 can further include a window barrel 980 and a bending indication piece 990. The window barrel 980 is fixedly connected with the screw rod 810 and abuts against the knob 910. The window barrel 980 is provided with an axially extending third groove 981. The bending indication piece 990 is clamped at the third groove 981, and the inner surface of the bending indication piece 990 is provided with a second protruding portion 991 matched with the second groove 923, so that the bending indication piece 990 moves axially when the driving member 920 rotates.

[0179] The sizes and angles of the second groove 923 and the third groove 921 in the present embodiment are matched with each other, so that the movement stroke of the bending indication piece 990 is consistent with that of the bending connecting member 930. Therefore, the stroke of the bending connecting member 930 can be directly observed through the bending indication piece 990, and the bending amplitude of the bending tube 210 can be further understood.

[0180] Specifically, the specific structure of the delivery device 100 of the present embodiment is as follows:

[0181] The elbow tube 210 is sleeved outside the inner tube 220, the distal end of the elbow tube 210 is bonded and sealed with the inner tube 220 by glue, and the proximal end is bonded with the first evacuation valve 400 and the connecting piece 310 by glue, so as to keep the inner tube 220 and the elbow tube 210 sealed and evacuated through the first evacuation valve 400.

[0182] The outer tube 230 is sleeved outside the elbow tube 210, and the distal end of the outer tube 230 is flush with the distal end of the inner tube 220 when not in use. The inner wall of the outer tube 230 is sealed with the distal end of the elbow tube 210 by the first sealing piece. The middle section of the outer tube 230 matches the length of the elbow tube 210 to follow the bending of the elbow tube 210. The proximal end of the outer tube 230 is located in the middle section of the elbow tube 210 (not the exact middle). The proximal end of the outer tube 230 is connected with the release knob assembly 600, and the outer tube 230 is moved axially relative to the elbow tube 210 by the release knob assembly 600. The proximal end of the outer tube 230 is bonded with the second evacuation valve 500 by glue, so as to keep the outer tube 230 and the elbow tube 210 sealed and evacuated through the second evacuation valve 500.

[0183] The buffer tube 240 is sleeved outside the outer tube 230, the distal end of the buffer tube 240 is sealed with the outer tube 230 by the second sealing piece, and the proximal end of the buffer tube 240 is connected with the stress dispersion tube 250 and then connected with the third evacuation valve 700 to form a seal. The handle 800 is arranged at the third evacuation valve 700.

[0184] Specifically, the screw rod 810 is sleeved outside the outer tube 230, and the distal end of the screw rod 810 is connected with the stress dispersion tube 250. The handle 800 is fixedly connected with the screw rod 810. The outer thread 811 of the middle section of the screw rod 810 is matched with the release knob assembly 600, and the proximal end directly extends to the proximal end of the elbow tube 210. The elbow knob assembly 900 is arranged at the proximal end of the screw rod 810, which pulls the elbow member 320 through the elbow knob assembly 900, so as to adjust the bending degree of the elbow tube 210.

[0185] In a specific application scenario, the action process of the delivery device 100 of the present embodiment (as shown in FIGS. 22-27) can include:

[0186] (1) Under sterile conditions, the delivery device 100 is evacuated through the first evacuation valve 400, the second evacuation valve 500, and the third evacuation valve 700;

[0187] (2) Counter-clockwise rotate the release knob assembly 600 to expose the distal end of the inner tube 220 (as shown in Fig. 22), place the valve 1000 between the tip 221 of the inner tube 220 and the top ring 213 (as shown in Fig. 23), and then clockwise rotate the release knob assembly 600 to press the valve into the front section 233 of the outer tube 230.

[0188] (3) After puncture, the delivery device 100 is inserted through the femoral artery, and the bending tube 210 is adjusted by the bending knob assembly 900 in combination with the contrast and bending indicator 990, so that the bending tube 210 is consistent with the blood vessel (as shown in Fig. 24). During the bending process by the bending knob assembly 900, when the force separating the main force piece 940 and the slave force piece 950 is less than or equal to the pressure of the spring 970 on the main force piece 940, the main force piece 940 and the slave force piece 950 move together, and in combination with other components of the bending knob assembly 900, the bending member 320 is driven to bend the bending tube 210, so that the bending tube reaches the final destination. When the force separating the main force piece 940 and the slave force piece 950 is greater than the pressure of the spring 970 on the main force piece 940 during rotation, the main force piece 940 and the slave force piece 950 will slip, so that the bending tube 210 cannot be further bent, thereby protecting the bending member or avoiding damage to the blood vessel.

[0189] (4) After positioning, counter-clockwise operate the release knob assembly 600 to gradually release the valve, but not completely (as shown in Fig. 25).

[0190] (5) Observe the working state of the valve, if the valve implantation position is not ideal, then clockwise rotate the release knob assembly 600 to completely recover the valve (as shown in Fig. 24).

[0191] (6) Re-position by operating the bending knob assembly 900 or the handle 800, and repeat steps (4) and (5) until the valve implantation position meets the requirements.

[0192] (7) Counter-clockwise operate the release knob assembly 600 to completely release the valve (as shown in Fig. 26).

[0193] (8) Withdraw the delivery device 100 from the femoral artery (as shown in Fig. 27), and complete the valve implantation surgery.

[0194] At this point, those skilled in the art should recognize that although the application has been fully shown and described herein with reference to a number of exemplary embodiments, many other variations or modifications can be directly determined or deduced from the disclosure of the application in accordance with the principles of the application without departing from the spirit and scope of the application. Therefore, the scope of the application should be understood and recognized as covering all these other variations or modifications.

Claims

1. A multidirectional bending conveyor, characterized in that The conduit assembly comprises a bending pipe, the bending pipe comprises a bending part and a straightening part connected with each other, the bending part comprises a plurality of serpentine units rotatably connected in sequence; each of the serpentine units comprises a body, a pair of first connecting ears arranged at one end of the body in the axial direction, and a pair of second connecting ears arranged at the other end of the body in the axial direction; the pair of second connecting ears of a previous serpentine unit and the pair of first connecting ears of a subsequent serpentine unit are pivotally connected with each other, and the rotation axis extends along the radial direction of 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 included angle between the line connecting the centers of the two first connecting ears and the line connecting the centers of the two second connecting ears of the same serpentine unit is 0°-90° when the projections of the two lines on a preset plane, wherein the preset plane is a plane perpendicular to the axis of the body.

2. The multi-directional bending conveyor according to claim 1, wherein at least one of the included angles is not 0° or not 90°.

3. The multi-directional bending conveyor according to claim 2, wherein a first through hole is arranged at each of the first connecting ears, a second through hole is arranged at each of the second connecting ears, and after the first connecting ears and the second connecting ears are clamped with each other, a fastener is simultaneously inserted through the first through hole and the second through hole, so that the two adjacent serpentine units rotate around the fastener as the rotation axis.

4. The multi-directional bending conveyor according to claim 3, wherein the two ends of the serpentine unit are both configured to form a plane away from the center of the first connecting ear or the second connecting ear, and the plane is parallel to the preset plane; and the center of the first through hole is protruded from the end where the first through hole is arranged, and / or the center of the second through hole is protruded from the end where the second through hole is arranged, so that a preset distance is left between the two adjacent ends after the two adjacent serpentine units are pivotally connected.

5. The multi-directional bending conveyor according to claim 3, wherein at least one end of the serpentine unit is configured to form a plane away from the center of the first connecting ear or the second connecting ear, and the plane is at a preset angle with the preset plane and is inclined towards the body itself, wherein the preset angle is 0-90°, and 0° and 90° are excluded; optionally, at least one end of the serpentine unit is configured to form a curved surface away from the center of the first connecting ear or the second connecting ear.

6. The multi-directional bending conveyor according to any one of claims 1-5, further comprising at least one set of bending driving assembly, each set of the bending driving assembly comprises a bending member arranged at the outer wall or the inner wall of the serpentine unit.

7. The multi-directional bending conveyor according to claim 6, wherein the bending member is arranged in a spiral shape. ​ Optionally, the bending member is arranged at the outer wall or the inner wall of the two first connecting ears or the two second connecting ears of one of the snake units.

8. The multi-directional bending conveyor according to claim 6, wherein, Each of the bending driving assemblies further comprises a plurality of connecting members, by which the bending member is connected to the outer wall or the inner wall of the corresponding snake unit.

9. The multi-directional bending conveyor according to any one of claims 1-5, wherein, At least one axially protruding first protrusion and at least one axially recessed first clamping groove are arranged at one end of the bending part close to the straightening part; at least one axially protruding second protrusion and at least one axially recessed second clamping groove are arranged at one end of the straightening part close to the bending part, and the bending part and the straightening part are connected to each other by the cooperation of the first protrusion and the first clamping groove, and the cooperation of the second protrusion and the second clamping groove. Optionally, the bending tube further comprises a first polymer layer arranged outside the bending part and the straightening part.

10. The multi-directional bending conveyor according to any one of claims 1-5, wherein, The catheter assembly further comprises an inner tube, the inner tube is arranged inside the bending tube, and the distal end of the inner tube is sealingly connected to the distal end of the bending tube, and the proximal end of the inner tube is in fluid communication with the first air evacuation valve to evacuate the air in the inner tube through the first air evacuation valve.

11. The multi-directional bending conveyor according to claim 10, wherein, The catheter assembly further comprises an outer tube, the outer tube is arranged outside the bending tube, the distal end of the outer tube is in contact with the distal end of the inner tube, and the distal end of the outer tube and the distal end of the bending tube are sealingly connected by a first sealing member, and a second air evacuation valve is arranged between the proximal end of the outer tube and the bending tube to evacuate the air between the outer tube and the bending tube; Optionally, the outer tube comprises a metal tube, and the metal tube comprises at least one axially extending rib. Optionally, the metal tube comprises 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 comprises at least one second polymer layer, and the at least one second polymer layer is wrapped outside the metal tube.

12. The multi-directional bending conveyor according to claim 11, wherein, The catheter assembly further comprises a buffer tube, and the buffer tube is arranged outside the outer tube to serve as a buffer; Optionally, the proximal end of the buffer tube is sealingly connected to the outer tube by a second sealing member, and a third air evacuation valve is arranged between the proximal end of the buffer tube and the outer tube to evacuate the air between the buffer tube and the outer tube.

13. The multi-directional bending conveyor according to claim 12, wherein, Further comprising a stress dispersion tube, the stress dispersion tube is arranged between the proximal end of the buffer tube and the third air evacuation valve to form a buffer.

14. The multi-directional bending conveyor according to claim 12, wherein, Further comprising a screw rod and a bending knob assembly, the screw rod is sleeved outside the straightening part of the bending tube, one end of the screw rod is connected with the third exhaust valve, and the other end is connected with the first exhaust valve, the screw rod is provided with an axially extending long hole; The bending knob assembly comprises: a knob which is sleeved outside the screw rod and rotates under the action of external force; a driving member which is a cylindrical structure, sleeved outside the screw rod and rotates with the knob, the driving member is provided with a helical first groove inside; a bending connecting member which is fixedly connected with the proximal end of the bending member, the bending connecting member is sleeved outside the straightening part and has a first protruding part, the first protruding part passes through the long hole and cooperates with the first groove, so that when the driving member rotates, the bending connecting member moves axially along the bending tube, thereby pulling the bending member to drive the bending tube to bend or straighten.

15. The multi-directional bending conveyor according to claim 14, wherein The bending knob assembly further comprises: a main force applying piece which is cylindrical, sleeved outside the screw rod, and threadedly connected with the knob so that the main force applying piece rotates with the knob; a slave force applying piece which is cylindrical, sleeved outside the screw rod, and in contact with the main force applying piece so that the slave force applying piece rotates with the main force applying piece when the main force applying piece rotates; the inner wall of the slave force applying piece is in transmission connection with the driving member so that the driving member rotates when the slave force applying piece rotates.

16. The multi-directional bending conveyor according to claim 15, wherein The main force applying piece and the slave force applying piece are both friction pieces; Alternatively, the main force applying piece and the slave force applying piece are both torsion teeth pieces, and the two torsion teeth pieces are in meshing with each other so that the slave force applying piece rotates with the main force applying piece.

17. The multi-directional bending conveyor according to claim 15, wherein The bending knob assembly further comprises: a stopper which is connected with the proximal end of the screw rod; and a resilient member which is arranged between the end of the main force applying piece away from the slave force applying piece and the stopper ring, so as to adjust the upper limit and lower limit of the bending force by adjusting the pressure of the main force applying piece and the slave force applying piece or the interaction force between the main force applying piece and the slave force applying piece.

18. The multi-directional bending conveyor according to claim 17, wherein The bending knob assembly further comprises: a window barrel which is fixedly connected with the screw rod and abuts against the bending knob; the window barrel is provided with an axially extending third groove inside; and a bending indicating piece which is clamped at the third groove, and the inner surface of the bending indicating piece is threadedly connected with the outer surface of the driving member so that the bending indicating piece moves axially when the driving member rotates.

19. A valve delivery system characterized by comprises: the multi-directional bending conveyor according to any one of claims 1-18; and a release knob assembly for driving the outer tube to move axially relative to the bending tube, thereby accommodating or releasing the valve; The release knob assembly comprises: a knob connecting ring which is connected with the second exhaust valve; and ​ A release knob, a distal end of which is rotatably connected with the knob connecting ring, and when the release knob is moved axially by an external force, the knob connecting ring is moved axially, and then the second emptying valve and the outer tube are moved axially.

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