Artificial valve delivery catheter and delivery device

Abstract

The present invention provides a delivery catheter for an artificial valve, comprising a first component and a second component. The first component comprises a sheath tube capable of accommodating the artificial valve, a guide head fixedly connected to one end of the sheath tube, and an inner core tube fixedly connected to the guide head and located in the lumen of the sheath tube; the second component comprises an outer tube, an inner tube located in the lumen of the outer tube, and a fixed head fixedly connected to the inner tube. The inner core tube is arranged in the lumen of the inner tube, and a circumferential positioning fit is formed between the sheath tube or the inner core tube and the fixed head. When the inner core tube rotates circumferentially, it can drive the guide head, the sheath tube, and the fixed head to rotate in coordination as a whole, thereby achieving the purpose of adjusting the circumferential angle of release of the artificial valve. At this time, the inner tube and the outer tube are kept stationary, maintaining the three-dimensional configuration required for positioning, thereby improving the accuracy of the release positioning of the artificial valve. After being adjusted into place, the inner core tube can move axially within the fixed head, thereby driving the guide head and the sheath tube to move axially, thereby achieving the purpose of releasing the artificial valve.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a delivery catheter and a delivery device for an artificial valve. Background Art

[0002] With socioeconomic development and an aging population, the incidence of valvular heart disease has increased significantly. Studies have shown that the incidence of valvular heart disease in the elderly over 75 years old is as high as 13.3%. Currently, traditional surgical treatment remains the preferred treatment for patients with severe valvular disease. However, for patients of advanced age, those with multiple organ diseases, those with a history of open-chest surgery, and those with poor cardiac function, traditional surgery carries significant risks and high mortality rates, and some patients may not even have the opportunity for surgery. Transcatheter heart valve replacement, with its advantages of not requiring a thoracotomy, minimal trauma, and rapid patient recovery, has garnered widespread attention from experts and scholars.

[0003] During heart valve replacement surgery, the artificial valve needs to be released precisely. Due to the complex anatomical structure of the human body, artificial valves are often designed into irregular shapes. For example, in order to achieve anchoring of the artificial valve, it is designed to fit the anatomical structure, and the cross-section of the stent is designed to be D-shaped, polygonal, etc. In order to accurately release the artificial valve with an irregular cross-section to the anatomical position, the delivery device needs to be able to adjust the angle of the artificial valve. However, since the delivery pathways of the femoral artery and femoral vein are non-linear, and the final configuration of the delivery device is not on the same plane, it is impossible for traditional delivery systems to achieve circumferential rotation and maintain the configuration unchanged at the same time. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a new artificial valve delivery catheter and delivery device to solve the problem that artificial valves with irregular cross-sections are difficult to accurately release.

[0005] According to one aspect of the present invention, a delivery catheter for an artificial valve is provided, comprising a first component and a second component, wherein the first component comprises a sheath tube capable of accommodating an artificial valve, a guide head fixedly connected to one end of the sheath tube, and an inner core tube fixedly connected to the guide head and located in the cavity of the sheath tube; the second component comprises an outer tube, an inner tube located in the cavity of the outer tube, and a fixed head fixedly connected to the inner tube, the inner core tube being arranged in the cavity of the inner tube, and a circumferential positioning fit being formed between the sheath tube or the inner core tube and the fixed head.

[0006] Furthermore, in the above-mentioned artificial valve delivery catheter, the inner wall of the fixing head and the outer wall of the inner core tube form a nested structure.

[0007] Furthermore, in the delivery catheter of the artificial valve, the inner wall of the fixing head is provided with a protrusion or a groove, and the outer wall of the inner core tube is provided with a groove or a protrusion that matches the protrusion or groove of the inner wall of the fixing head.

[0008] Furthermore, in the delivery catheter of the artificial valve, the inner wall of the sheath tube and the outer wall of the fixing head form a nested structure.

[0009] Furthermore, in the delivery catheter of the artificial valve, the inner wall of the sheath is provided with a protrusion or a groove, and the outer wall of the fixing head is provided with a groove or a protrusion that matches the protrusion or groove of the inner wall of the sheath.

[0010] Furthermore, in the delivery catheter of the above-mentioned artificial valve, the outer wall or inner wall of the fixed head is provided with at least one embedded section, and the friction force generated between the embedded section and the sheath tube or inner core tube is greater than the friction force generated between the valve and the sheath tube or inner core tube.

[0011] Furthermore, in the delivery catheter of the artificial valve, the static friction coefficient between the embedded section and the sheath tube or the inner core tube is in the range of 0.1-1.5.

[0012] Furthermore, in the above-mentioned artificial valve delivery catheter, the embedded section includes a first strip-shaped unit and a second strip-shaped unit, and a first spring and a second spring are connected between the first strip-shaped unit and the second strip-shaped unit.

[0013] Furthermore, the delivery catheter of the artificial valve further includes a pull wire, which is arranged at the connection between the first strip unit and the second strip unit and the first spring or the second spring.

[0014] Furthermore, in the delivery catheter of the artificial valve, the pull wire is located between the inner tube and the inner core tube, and the inner tube is a multi-lumen tube.

[0015] Furthermore, in the delivery catheter of the artificial valve, the pull wire is located in the inner core tube, and the inner core tube is a multi-lumen tube.

[0016] Furthermore, in the above-mentioned artificial valve delivery catheter, the first strip-shaped units and the second strip-shaped units are axially symmetrically distributed on the outer wall or the inner wall of the fixing head.

[0017] Furthermore, in the delivery catheter of the artificial valve, the fixing head and the inner tube are connected via a bearing or elastic material.

[0018] Furthermore, in the above-mentioned artificial valve delivery catheter, the outer tube is a polymer tube or a composite tube of metal and polymer.

[0019] Furthermore, the guide head of the artificial valve delivery catheter has a streamlined shape structure.

[0020] According to another aspect of the present invention, a delivery device for an artificial valve is provided, comprising a handle and a delivery catheter connected to the handle, the handle comprising an inner core tube movable part and a fixed connecting piece, the inner core tube movable part being connected to the inner core tube for controlling the axial or circumferential movement of the inner core tube, and the fixed connecting piece being fixedly connected to the inner tube.

[0021] Furthermore, in the above-mentioned artificial valve delivery device, the pull wire is located between the inner tube and the inner core tube and is connected to the handle, or the pull wire passes through the inner core tube and is connected to the handle.

[0022] Compared with the prior art, the artificial valve delivery catheter of the present invention forms a circumferential positioning fit between the sheath or inner core tube and the fixed head, which can realize that when the inner core tube rotates circumferentially, it drives the guide head, sheath and fixed head as a whole to rotate in a coordinated manner, thereby achieving the purpose of adjusting the circumferential angle of release of the artificial valve. At this time, the inner tube and the outer tube are kept stationary, and the three-dimensional configuration required for positioning is maintained, thereby improving the accuracy of the release and positioning of the artificial valve. After being adjusted into place, the inner core tube can move axially in the fixed head, thereby driving the guide head and the sheath to move axially, so as to achieve the purpose of releasing the artificial valve. The artificial valve delivery catheter provided by the present invention can accurately release artificial valves with irregular cross-sections at the lesion site, thereby improving the release accuracy of artificial valves with irregular cross-sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of an artificial valve delivery catheter according to an embodiment of the present invention;

[0024] Figure 2 This is a cross-sectional view of the circumferential matching structure of the sheath tube or inner core tube and the fixing head according to an embodiment of the present invention;

[0025] Figure 3 Schematic diagram of the structure of an artificial valve delivery device according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the handle structure of an embodiment of the present invention;

[0027] Figure 5 This is a cross-sectional view of the nested matching structure of the fixed head and the inner core tube according to an embodiment of the present invention;

[0028] Figure 6 Schematic diagram of the structure of the concave-convex shape matching between the fixed head and the inner core tube according to an embodiment of the present invention;

[0029] Figure 7 This is a cross-sectional view of the nested matching structure of the sheath tube and the fixing head according to an embodiment of the present invention;

[0030] Figure 8 Schematic diagram of the concave-convex matching structure of the sheath tube and the fixing head according to an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of a three-dimensional structure of an embedded section provided on the outer wall of a fixed head according to an embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the structure of the embedded section and the spring in cooperation with each other when the sheath tube and the fixed head are separated according to an embodiment of the present invention;

[0033] Figure 11 This is a schematic diagram of the structure of the embedded section and the spring in a locked state between the sheath tube and the fixed head according to an embodiment of the present invention;

[0034] Figure 12 This is a schematic diagram of the structural state in which the sheath tube and the fixing head are separated when the pull wire is tightened according to an embodiment of the present invention;

[0035] Figure 13 This is a schematic diagram of the locking structure state of the sheath tube and the fixed head when the pull wire is loosened according to an embodiment of the present invention;

[0036] Figure 14 This is a cross-sectional view of the locking structure of the fixed head and the inner core tube when the cable is tightened according to an embodiment of the present invention;

[0037] Figure 15 This is a schematic diagram of the structure of the embedded section and the spring in a locked state between the fixed head and the inner core tube according to an embodiment of the present invention;

[0038] Figure 16 for Figure 14 An enlarged schematic diagram of the locking structure between the fixed head and the inner core tube when the cable is tightened;

[0039] Figure 17 This is a cross-sectional view of the structure in which the fixed head and the inner core tube are separated when the wire is relaxed according to an embodiment of the present invention;

[0040] Figure 18 This is a schematic diagram of the structure of the embedded section and the spring in cooperation with each other when the fixed head and the inner core tube are separated according to an embodiment of the present invention;

[0041] Figure 19 for Figure 17 An enlarged schematic diagram of the structural state of the fixed head and the inner core tube being separated when the pull wire is relaxed;

[0042] Figure 20 This is a structural schematic diagram of the artificial valve loading process according to an embodiment of the present invention;

[0043] Figure 21 This is a structural schematic diagram of the artificial valve release process according to an embodiment of the present invention;

[0044] Figure 22 This is a structural schematic diagram of the artificial valve release process according to an embodiment of the present invention;

[0045] 1-delivery catheter; 2-handle; 3-artificial valve; 11-guide head; 12-sheath; 13-outer tube; 14-fixed head; 15-inner tube; 16-inner core tube; 21-movable part of inner core tube; 22-fixed connector; 141-embedded section; 1411-first strip unit; 1412-second strip unit; 1421-first spring; 1422-second spring; 142-pull wire. DETAILED DESCRIPTION

[0046] In order to make the creative features, technical means and objectives of the present invention easier to understand, the present invention is further described below with reference to specific embodiments.

[0047] like Figure 1 As shown, the delivery catheter for an artificial valve provided by an embodiment of the present invention includes a first component and a second component, the first component includes a sheath 12 that can accommodate an artificial valve 3, a guide head 11 fixedly connected to one end of the sheath 12, and an inner core tube 16 fixedly connected to the guide head 11 and located in the cavity of the sheath 12; the second component includes an outer tube 13, an inner tube 15 located in the cavity of the outer tube 13, and a fixed head 14 fixedly connected to the inner tube 15, and the inner core tube 16 is arranged in the cavity of the inner tube 15.

[0048] Preferably, the sheath tube 12 of the present invention is smoothly and fixedly connected to the guide head 11. The guide head 11 has a streamlined shape structure, which can avoid scratching the inner wall of the blood vessel and is also conducive to guiding the entire delivery catheter to advance along the blood vessel channel.

[0049] like Figure 2 As shown, the sheath tube 12 or the inner core tube 16 of the present invention forms a circumferential positioning fit with the fixed head 14. When the inner core tube 16 moves axially, it drives the guide head 11 and the sheath tube 12 to move axially to achieve the loading and release of the artificial valve. When the inner core tube 16 moves circumferentially, it can drive the guide head 11, the sheath tube 12 and the fixed head 14 to rotate in coordination as a whole, thereby achieving the purpose of adjusting the circumferential release angle of the artificial valve 3. At this time, the inner tube 15 and the outer tube 13 remain stationary to maintain the three-dimensional configuration required for the positioning of the delivery device, thereby improving the accuracy of the release positioning of the artificial valve 3.

[0050] like Figure 3 As shown, an embodiment of the present invention provides an artificial valve delivery device comprising a handle 2 and a delivery catheter 1 connected to the handle 2. In practice, the present invention refers to the direction toward the delivery catheter 1 as the distal end, and the direction toward the handle 2 as the proximal end.

[0051] like Figure 4As shown, the handle 2 of the present invention includes an inner core tube movable part 21 and a fixed connecting part 22. The inner core tube movable part 21 is connected to the inner core tube 16 to control the axial or circumferential movement of the inner core tube 16. The fixed connecting part 23 is fixedly connected to the inner tube 15.

[0052] In practice, the present invention adjusts the alignment of the prosthetic valve 3 with the native annulus by driving the bearings of the inner core tube 21 to rotate circumferentially, thereby causing the inner core tube 16 to drive the guide head 11, sheath tube 12, and fixed head 14 to rotate in unison. Once the alignment is in place, the handle 2 drives the bearings to move the fixed connector 22 axially, causing the inner core tube 16 to drive the guide head 11 and sheath tube 12 to move axially relative to the inner tube 15, thereby enabling the loading and release of the valve prosthesis 3.

[0053] Optionally, the handle in the embodiment of the present invention may be driven by electric drive or manual drive.

[0054] In the embodiment of the present invention, the circumferential positioning cooperation between the sheath tube 12 or the inner core tube 16 and the fixing head 14 is achieved in the following four ways:

[0055] Example 1: Figure 5-6 As shown, the inner wall of the fixing head 14 and the outer wall of the inner core tube 16 form a nested structure, which can achieve circumferential fixation of the fixing head 14 and the inner core tube 16. Specifically, the inner wall of the fixing head 14 is provided with a protrusion or groove (C), and the outer wall of the inner core tube 16 is provided with a groove or protrusion that matches the protrusion or groove on the inner wall of the fixing head 14.

[0056] Optionally, the shape of the projections or grooves on the inner wall of the fixed head 14 and the outer wall of the inner core tube 16 can be square, triangle, circle or other irregular figures etc. Moreover, the number of projections or grooves can be 1 or more.

[0057] Optionally, the plurality of protrusions or grooves may be of the same shape or of different shapes, and may be evenly distributed on the circumference of the inner wall of the fixing head 14 and the outer wall of the inner core tube 16, or unevenly distributed on the circumference of the inner wall of the fixing head 14 and the outer wall of the inner core tube 16. Preferably, the plurality of protrusions or grooves are symmetrically distributed on the circumference of the inner wall of the fixing head 14 and the outer wall of the inner core tube 16.

[0058] Although the concave and convex shapes of the fixing head 14 and the inner core tube 16 can be switched, since the wall thickness of the tube is relatively small, it is a better choice to make the outer wall of the inner core tube 16 into a convex structure.

[0059] Example 2: Figure 7-8As shown, the inner wall of the sheath tube 12 and the outer wall of the fixing head 14 form a nested structure, which can achieve circumferential fixation of the sheath tube 12 and the fixing head 14. Specifically, the inner wall of the sheath tube 12 is provided with a protrusion or groove (C'), and the outer wall of the fixing head 14 is provided with a groove or protrusion that matches the protrusion or groove on the inner wall of the sheath tube 12.

[0060] Optionally, the shape of the protrusions or grooves on the inner wall of the sheath tube 12 and the outer wall of the fixing head 14 can be square, triangular, circular or other irregular shapes, etc. Moreover, the number of the protrusions or grooves can be one or more.

[0061] Optionally, the plurality of protrusions or grooves may be of the same shape or of different shapes, and may be evenly distributed or unevenly distributed on the circumference of the outer wall of the fixing head 14 and the inner wall of the sheath tube 12. Preferably, the plurality of protrusions or grooves are symmetrically distributed on the circumference of the outer wall of the fixing head 14 and the inner wall of the sheath tube 12.

[0062] Although the concave and convex shapes of the sheath tube 12 and the fixing head 14 in the embodiment of the present invention can be switched, since the wall thickness of the tube is relatively small, it is a better choice to make the inner wall of the sheath tube 12 into a convex structure.

[0063] Example 3: Figure 9 As shown, the outer wall of the fixing head 14 is provided with at least one embedded section 141. The friction generated between the embedded section 141 and the sheath 12 is greater than the friction generated between the valve and the sheath 12, so that the friction generated between the fixing head 14 and the sheath 12 is greater than the valve release and retraction forces. In this embodiment, the sheath 12 and the fixing head 14 are locked by friction to achieve coordinated rotation.

[0064] Specifically, one or more sections of material with a high friction coefficient are embedded in the outer wall of the fixing head 14 . The outer diameter of the embedded section 141 can be varied to achieve friction locking and unlocking with the sheath tube 12 .

[0065] Preferably, in the above-mentioned artificial valve delivery device, the static friction coefficient between the embedding section 141 and the sheath tube 12 is in the range of 0.1-1.5.

[0066] Furthermore, if Figure 10-11 As shown, the embedding section 141 of the present invention includes two parts: a first strip unit 1411 and a second strip unit 1412 . A first spring 1421 and a second spring 1422 are connected between the first strip unit 1411 and the second strip unit 1412 .

[0067] Furthermore, the embodiment of the present invention further includes a pull wire 142 , which is provided at the connection between the first strip unit 1411 and the second strip unit 1412 and the first spring 1421 or the second spring 1422 .

[0068] In implementation, such as Figure 10 、 12 As shown, when the pull line 142 is tightened, the first spring 1421 (or the second spring 1422) is compressed, and the first strip unit 1411 and the second strip unit 1412 of the embedded section 141 are forced to move closer, and the fixed head 14 is separated from the sheath tube 12, and the movement of the two is not affected by each other. Figure 11 、 13 As shown, when the pull wire 142 is loosened, the first strip unit 1411 and the second strip unit 1412 of the embedded section 141 press outward against the sheath tube 12 , and the fixing head 14 and the sheath tube 12 are locked by the friction force of the embedded section 141 to achieve coordinated rotation.

[0069] Preferably, in the delivery device for the artificial valve of the present invention, the first strip unit 1411 and the second strip unit 1412 are axially symmetrically distributed on the outer wall of the fixing head 14, so that the pull wire 142 can be easily connected to all the embedded segments on one side.

[0070] Example 4: Figure 14-19 As shown, the inner wall of the fixed head 14 is provided with at least one embedded section 141. The friction generated between the embedded section 141 and the inner core tube 16 is greater than the friction generated between the valve and the inner core tube 16. This ensures that the friction generated between the fixed head 14 and the inner core tube 16 is greater than the valve release and retraction forces. In this embodiment, the fixed head 14 and the inner core tube 16 are locked by friction to achieve coordinated rotation.

[0071] Specifically, one or more sections of material with a high friction coefficient are embedded in the inner wall of the fixed head 14 . The outer diameter of the embedded section 141 can be varied to achieve friction locking and unlocking with the outer wall of the inner core tube 16 .

[0072] Preferably, in the above-mentioned artificial valve delivery device, the static friction coefficient between the embedded section 141 and the inner core tube 16 is in the range of 0.1-1.5.

[0073] Furthermore, if Figure 15 、 18 As shown, the embedding section 141 of the present invention includes two parts: a first strip unit 1411 and a second strip unit 1412 . A first spring 1421 and a second spring 1422 are connected between the first strip unit 1411 and the second strip unit 1412 .

[0074] Furthermore, the embodiment of the present invention further includes a pull wire 142 , which is provided at the connection between the first strip unit 1411 and the second strip unit 1412 and the first spring 1421 or the second spring 1422 .

[0075] In implementation, such as Figure 14-16 As shown, when the pull wire 142 is tightened, the first spring 1421 (or the second spring 1422) is compressed, and the first strip unit 1411 and the second strip unit 1412 of the embedded section 141 are forced to move closer. The embedded section 141 on the fixed head 14 is in close contact with the outer wall of the inner core tube 16. The fixed head 14 and the inner core tube 16 are locked by the friction force of the embedded section 141 and can move in coordination. Figure 17-19 As shown, when the pull wire 142 is relaxed, the two ends of the embedded section 141 are separated by the force of the spring, and the first strip unit 1411 and the second strip unit 1412 are away from the outer wall of the inner core tube 16. At this time, the movement of the two is not affected.

[0076] Preferably, in the delivery device for the artificial valve of the present invention, the first strip unit 1411 and the second strip unit 1412 are axially symmetrically distributed on the inner wall of the fixing head 14, so that the pull wire 142 can be easily connected to all the embedded segments on one side.

[0077] Furthermore, in the above-described artificial valve delivery device, the pull wire 142 is located between the inner tube 15 and the inner core tube 16 and is connected to the handle 2. In this case, the inner tube 15 is preferably a multi-lumen tube. Optionally, the pull wire 142 can also pass through the inner core tube 16 and be connected to the handle 2. In this case, the inner core tube 16 is preferably a multi-lumen tube.

[0078] Preferably, the pull wire 142 can be a single-strand wire or a multi-strand wire, including but not limited to a single solid metal wire, a multi-strand winding metal rope, etc. In practice, the present invention can adjust the outer diameter of the embedded section 141 by axially pulling the pull wire 142 .

[0079] Optionally, the fixed head 14 and inner tube 15 of the present invention are connected via a bearing or elastic material. Elastic materials include, but are not limited to, silicone, polyurethane, Pebax nylon elastomer, and other engineering polymers. Preferably, the bearing connection between the fixed head 14 and inner tube 15 allows for unrestricted circumferential rotation. The fixed head 14 and inner tube 15 are connected via a spring or elastic material, providing a rotational limit angle determined by the properties of the spring or elastic material.

[0080] In the embodiment of the present invention, the handle 2 drives the bearing to drive the axial movement of the inner core tube movable part 21, thereby causing the inner core tube 16 to drive the guide head 11 and the sheath tube 12 to move axially relative to the inner tube 15, thereby achieving the loading and release of the artificial valve 3. In addition, the handle 2 drives the bearing to drive the circumferential rotation of the inner core tube movable part 21, so that the inner core tube 16 drives the guide head 11, the sheath tube 12 and the fixed head 14 to rotate in coordination, thereby adjusting the release angle of the artificial valve 3 to achieve the purpose of precise release.

[0081] Optionally, the outer tube 13 of the present invention can be a controllable bend tubing material, such as a polymer tube or a metal-polymer composite tube. In practice, the outer tube 13 is a polymer composite tube with a metal structure on its inner surface. At least one metal wire is embedded within the outer tube 13. The bending angle, position, and direction of the outer tube 13 are controlled by pulling different metal wires. Preferably, multiple metal wires are embedded within the controllable bend tubing to enhance bending accuracy.

[0082] The artificial valve loading process of the embodiment of the present invention is as follows: Figure 20 As shown, the driving handle 2 causes the inner core tube 16 to drive the guide head 11 and the sheath tube 12 to move as a whole toward the distal end until the fixed head 14 is exposed, and then the self-expanding artificial valve 3 is clamped in the fixed head 14. The artificial valve 3 can be stabilized with the help of an auxiliary loading tool. After the artificial valve 3 is stabilized, the inner core tube 16 is driven to move toward the proximal end until the sheath tube 12 completely wraps the artificial valve 3, and the distal end face of the artificial valve 3 is against the end face of the guide head 11, and the loading of the artificial valve 3 is completed.

[0083] The artificial valve delivery process of the embodiment of the present invention is as follows: the entire artificial valve delivery device is inserted into the puncture port along the guide wire and then enters the human body. Then, the catheter assembly 1 is passed through the atrial septum along the femoral vein vascular pathway, and the sheath 12 is delivered to the diseased valve annulus.

[0084] The release process of the artificial valve according to the embodiment of the present invention is as follows: Figure 21 As shown, first, the outer tube 13 is used to control the bend, and after it is adjusted into place, the outer tube 13 is fixed. At this time, the inner core tube 16 is driven by the handle 2 to rotate circumferentially. The circumferential rotation of the inner core tube 16 can simultaneously drive the guide head 11, the sheath tube 12 and the fixed head 14 to rotate in coordination, thereby adjusting the relative position of the artificial valve 3 and the native valve ring to ensure that the artificial valve fits the native valve ring better. After the artificial valve 3 is adjusted into place circumferentially, the handle 2 drives the inner core tube 16 to drive the guide head 11 and the sheath tube 12 to move distally, and begins to release the artificial valve 3 until the artificial valve 3 is completely released to the designated position and is separated from the delivery system.

[0085] Specifically, if Figure 22As shown, when the sheath 12 moves toward the distal end, the inflow duct 32 of the artificial valve 3 is released first. As the sheath 12 continues to move, the outflow duct 33 of the artificial valve 3 is slowly released until the proximal end of the sheath 12 moves to the fixing head 14 and the fixing head 14 is exposed, and the artificial valve 3 is completely released.

[0086] Preferably, in the embodiment of the present invention, the release of the artificial valve 3 can be paused at any time during the release process of the artificial valve, and the rotation action of the inner core tube 16 can be switched to circumferential alignment, so as to better achieve real-time alignment and precise release of the artificial valve 3.

[0087] In summary, the inner core tube 16 of the embodiment of the present invention can drive the sheath tube 12 and the fixing head 14 to move freely in the circumferential direction to adjust the position of the artificial valve 3 with an irregular cross-section. At the same time, the inner core tube 16 can drive the sheath tube 12 to move freely in the axial direction, while the fixing head 14 remains stationary in the axial direction to achieve the loading and release of the artificial valve 3. This achieves the beneficial effects of the inner core tube 16 and the fixing head 14 moving circumferentially in coordination without interfering with each other in the axial direction, and the fixing head 14 being axially fixed by the inner tube 15 without interfering with the circumferential direction.

[0088] In the embodiment of the present invention, the overall configuration of the delivery device remains unchanged, that is, the artificial valve can move circumferentially while being externally controlled and kept stationary, thereby solving the problem of accurate release of artificial valves with irregular cross-sections.

[0089] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A delivery catheter for an artificial valve, characterized in that: The invention comprises a first component and a second component, wherein the first component comprises a sheath tube (12) capable of accommodating an artificial valve (3), a guide head (11) fixedly connected to one end of the sheath tube (12), and an inner core tube (16) fixedly connected to the guide head (11) and located in the cavity of the sheath tube (12); the second component comprises an outer tube (13), an inner tube (15) located in the cavity of the outer tube (13), and a fixed head (14) fixedly connected to the inner tube (15), the inner core tube (16) being arranged in the cavity of the inner tube (15), and a circumferential positioning fit being formed between the sheath tube (12) or the inner core tube (16) and the fixed head (14); the outer wall or the inner wall of the fixed head (14) is provided with at least one section of embedded The embedded section (141) comprises a first strip-shaped unit (1411) and a second strip-shaped unit (1412), wherein a first spring (1421) and a second spring (1422) are connected between the first strip-shaped unit (1411) and the second strip-shaped unit (1412); the delivery catheter further comprises a pull wire (142), wherein the pull wire (142) is arranged at the connection between the first strip-shaped unit (1411) and the second strip-shaped unit (1412) and the first spring (1421) or the second spring (1422).

2. The artificial valve delivery catheter according to claim 1, characterized in that: The inner wall of the fixed head (14) and the outer wall of the inner core tube (16) form a nested structure.

3. The artificial valve delivery catheter according to claim 2, characterized in that: The inner wall of the fixing head (14) is provided with a protrusion or a groove, and the outer wall of the inner core tube (16) is provided with a groove or a protrusion that matches the protrusion or groove of the inner wall of the fixing head (14).

4. The artificial valve delivery catheter according to claim 1, characterized in that: The inner wall of the sheath tube (12) and the outer wall of the fixing head (14) form a nested structure.

5. The artificial valve delivery catheter according to claim 4, characterized in that: The inner wall of the sheath tube (12) is provided with a protrusion or a groove, and the outer wall of the fixing head (14) is provided with a groove or a protrusion that matches the protrusion or groove of the inner wall of the sheath tube (12).

6. The artificial valve delivery catheter according to claim 1, characterized in that: The static friction coefficient between the embedded section (141) and the sheath tube (12) or the inner core tube (16) is in the range of 0.1-1.

5.

7. The artificial valve delivery catheter according to claim 1, characterized in that: The pull wire (142) is located between the inner tube (15) and the inner core tube (16), and the inner tube (15) is a multi-lumen tube.

8. The artificial valve delivery catheter according to claim 1, characterized in that: The pull wire (142) is located in the inner core tube (16), and the inner core tube (16) is a multi-lumen tube.

9. The artificial valve delivery catheter according to claim 1, characterized in that: The first strip-shaped units (1411) and the second strip-shaped units (1412) are arranged on the outer wall or the inner wall of the fixing head (14) in an axisymmetric distribution.

10. The artificial valve delivery catheter according to claim 1, characterized in that: The fixed head (14) and the inner tube (15) are connected via a bearing or elastic material.

11. The artificial valve delivery catheter according to claim 1, characterized in that: The outer tube (13) is a polymer tube or a composite tube of metal and polymer.

12. The artificial valve delivery catheter according to claim 1, characterized in that: The guide head (11) has a streamlined shape structure.

13. A delivery device for an artificial valve, characterized in that: The invention comprises a handle (2) and a delivery catheter as claimed in any one of claims 1 to 12 connected to the handle (2), wherein the handle (2) comprises an inner core tube movable part (21) and a fixed connection part (22), the inner core tube movable part (21) is connected to the inner core tube (16) for controlling the axial or circumferential movement of the inner core tube (16), and the fixed connection part (22) is fixedly connected to the inner tube (15).

14. The artificial valve delivery device according to claim 13, characterized in that: The pull wire (142) is located between the inner tube (15) and the inner core tube (16) and is connected to the handle (2), or the pull wire (142) passes through the inner core tube (16) and is connected to the handle (2).

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