Artificial chordae tendineae implanting instrument

Abstract

The invention provides an artificial chordae tendineae implanting instrument which comprises a valve leaflet capturing assembly and an artificial chordae tendineae implanting assembly. The valve leaflet capturing assembly comprises a first clamping piece, a second clamping piece and a transmission assembly, and through transmission of the transmission assembly, the second clamping piece can be opened relative to the first clamping piece to form an included angle or closed to capture and clamp a valve leaflet of a valve between the first clamping piece and the second clamping piece. One of the first clamping piece and the second clamping piece is provided with a convex part in a protruding mode, the other one of the first clamping piece and the second clamping piece is provided with a groove, and when the first clamping piece and the second clamping piece are relatively closed and the valve leaflet does not fall between the convex part and the groove, the convex part is contained in the groove. The artificial chordae tendineae implanting assembly comprises a puncture needle and an artificial chordae tendineae which is contained in the puncture needle and can be pushed, after the valve leaflet capturing assembly captures and clamps the valve leaflet, the puncture needle punctures the valve leaflet, and the artificial chordae tendineae is pushed to the other side of the valve leaflet; the valve leaflet capturing assembly is separated from the valve leaflet and withdrawn after the artificial chordae tendineae is pushed to the other side of the valve leaflet.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an artificial tendon chord implantation device. Background Art

[0002] The atrioventricular valves such as the mitral valve and tricuspid valve are one-way valves in the heart. Normal and healthy atrioventricular valves can control the flow of blood from the atria to the ventricles, while preventing blood from flowing from the ventricles to the atria. Figure 1 As shown, the mitral valve MV is a one-way valve located between the left atrium LA and the left ventricle LV of the heart, which can control the blood flow from the left atrium LA to the left ventricle LV, and prevent the blood from flowing from the left ventricle LV to the left atrium LA; the tricuspid valve TV is a one-way valve located between the right atrium RA and the right ventricle RV of the heart, which can control the blood flow from the right atrium RA to the right ventricle RV, and prevent the blood from flowing from the right ventricle RV to the right atrium RA.

[0003] See also Figure 2 , a normal healthy mitral valve or tricuspid valve has multiple tendon chordae L. Taking the mitral valve as an example, the mitral valve leaflets are divided into anterior leaflet and posterior leaflet. When the left ventricle is in diastole, both are in open state, and blood flows from the left atrium to the left ventricle; when the left ventricle is in contraction, the tendons are stretched to ensure that the leaflets will not be washed to the atrial side by the blood flow, and the anterior and posterior leaflets are well closed, thereby ensuring that blood flows from the left ventricle through the aortic valve to the aorta. If there is a lesion in the chordae tendineae or papillary muscles, such as Figure 3 The chordae tendineae of the posterior leaflet shown in the figure are ruptured. When the left ventricle is in a contracted state, the mitral valve cannot return to a closed state as in a normal state. The force of blood flow will further cause the valve leaflet to dislocate into the left atrium, causing blood reflux.

[0004] After the chordae tendineae are diseased or ruptured, they cannot repair themselves. Even if a few chordae tendineae are ruptured, the tension of other chordae tendineae may increase and cause new ruptures. Currently, surgical procedures are usually used to implant artificial chordae tendineae to replace native chordae tendineae. Invasive thoracotomy techniques are required, and general anesthesia and moderate hypothermia extracorporeal circulation are used as auxiliary support. This type of surgical procedure has the disadvantages of complex surgical procedures, high surgical costs, high degree of patient trauma, high risk of complications, long hospital stays, and painful recovery processes for patients.

[0005] There is currently an instrument for implanting artificial chordae in a minimally invasive manner. The instrument clamps the leaflets with a distal clamp and a proximal clamp. During the process of capturing the leaflets, the clamping surface of the capturing clamp is at a specific design angle and cannot be adjusted, which makes capturing the leaflets difficult, the surgical operation is cumbersome, and the risk of surgical failure is high. Moreover, after the capturing clamp holds the leaflets, the clamp needs to be axially withdrawn to clamp the leaflets. At this time, as the leaflets beat, the capturing clamp is easily separated from the leaflets, making capturing difficult. Furthermore, when the capturing clamp is withdrawn, it is in a "hook shape", which leads to the risk of hooking the chordae and the leaflets during the withdrawal process, affecting the surgical operation of implanting artificial chordae. Summary of the invention

[0006] The technical problem to be solved by the present application is to provide an artificial chord implantation device to change the existing capture method and puncture method of the valve leaflets during artificial chord implantation.

[0007] In order to achieve the above purpose, the implementation method of this application adopts the following technical solutions:

[0008] An artificial tendon chord implantation device, comprising:

[0009] A leaflet capturing assembly, the leaflet capturing assembly comprising a first clamping member, a second clamping member and a transmission assembly, through the transmission of the transmission assembly, the second clamping member can be opened relative to the first clamping member to form an angle, or closed to capture and clamp the leaflets of the valve between the first clamping member and the second clamping member, one of the first clamping member and the second clamping member is protrudingly provided with a convex part, and the other of the first clamping member and the second clamping member is provided with a groove, when the first clamping member and the second clamping member are relatively closed and the leaflet does not fall between the convex part and the groove, the convex part is received in the groove; and

[0010] An artificial chord implantation assembly comprises a puncture needle and an artificial chord housed in the puncture needle and capable of being pushed; after the leaflet capture assembly captures and clamps the leaflet, the puncture needle punctures the leaflet, and the artificial chord is pushed to the other side of the leaflet; and the leaflet capture assembly is separated from and withdrawn from the leaflet after the artificial chord is pushed to the other side of the leaflet.

[0011] In a preferred embodiment, the surfaces facing each other of the first clamping member and the second clamping member are provided with clamping areas and non-clamping areas, at least one of the clamping areas is provided with clamping teeth to clamp the leaflet between the two clamping areas, and when the first clamping member and the second clamping member are relatively closed, there is a gap between the non-clamping areas of the first clamping member and the second clamping member to accommodate a portion of the leaflet that is not clamped, and the gap is between 0.5-2 mm.

[0012] In a preferred embodiment, the first clamping member and the second clamping member are respectively provided with connecting parts, the connecting parts are located on the side of the clamping area away from the non-clamping area, the connecting part of the second clamping member is hinged on the connecting part of the first clamping member, and one end of the transmission assembly is connected to the connecting part of the second clamping member to drive the second clamping member to open and close relative to the first clamping member.

[0013] In a preferred embodiment, a transmission channel is provided in the first clamping member, the transmission channel is communicated with the clamping area of ​​the first clamping member and extends to the connecting portion, the transmission assembly includes a transmission shaft and a transmission connecting member, the transmission shaft is movably accommodated in the transmission channel, one end of the transmission connecting member is pivotally connected to the second clamping member through a first pivot shaft, and the other end of the transmission connecting member is movably accommodated in the transmission channel and is pivotally connected to one end of the transmission shaft through a second pivot shaft.

[0014] In a preferred embodiment, the first clamping member is a block-shaped base, the second clamping member is a sheet-shaped cover, the connecting portion of the second clamping member has two ribs that are relatively spaced apart, one end of the two ribs away from the clamping area is hinged to the two sides of the connecting portion of the first clamping member through a rotating shaft, and one end of the two ribs close to the clamping area is pivotally connected to the transmission connecting member through the first pivot shaft.

[0015] In a preferred embodiment, the clamping areas of the first clamping member and the second clamping member are both provided with a plurality of clamping teeth, with a tooth groove between two adjacent clamping teeth, and when the first clamping member and the second clamping member do not clamp the leaflets and are relatively closed, the clamping teeth of the first clamping member engage with the tooth grooves of the second clamping member, and the plurality of clamping teeth extend laterally from one side of the clamping area to the other side of the clamping area, respectively, and the transmission channel has an opening in the clamping area of ​​the first clamping member, and the opening interrupts part of the clamping teeth of the first clamping member.

[0016] In a preferred embodiment, the convex part is arranged between the clamping area and the connecting part of one of the first clamping part and the second clamping part, and the groove is arranged between the clamping area and the connecting part of the other of the first clamping part and the second clamping part, and the height of the convex part is higher than the height of the clamping teeth. When the first clamping part and the second clamping part are relatively closed and the leaflet falls between the convex part and the groove, the convex part cannot be accommodated in the groove, so that the first clamping part and the second clamping part cannot be completely closed.

[0017] In a preferred embodiment, the convex component is provided on the second clamping member, the groove is provided on the first clamping member, and the transmission channel interrupts the groove.

[0018] In a preferred embodiment, the convex component is arranged on the first clamping member, and the convex component includes two, and the two convex components are respectively located on both sides of the transmission channel, and the groove is arranged on the second clamping member, and the groove includes two, and the two grooves are arranged corresponding to the two convex components.

[0019] In a preferred embodiment, a limit boss is provided at the connection between the transmission channel and the connecting portion, and the limit boss is used to limit the transmission connecting member to limit the maximum angle of the second clamping piece relative to the first clamping piece. The transmission channel includes a curved section, and the limit boss is located at the end position of the curved section at the connecting portion. The transmission connecting member includes a curved section and a straight section connected to the curved section. The bottom surface of the curved section close to the curved section has a rounded corner, and the surface of the curved section facing away from the curved section has an arc surface. The surface of the straight section connected to the arc surface is a straight surface, and at least a portion of the arc surface is located at the second clamping member, and at least a portion of the straight portion is located at the first clamping member.

[0020] In a preferred embodiment, the non-clamping areas of the first clamping member and the second clamping member are respectively inclined relative to the clamping area, and the non-clamping areas of the first clamping member and the second clamping member are parallel to each other, the first clamping member is provided with a guide groove, the guide groove is connected with the non-clamping area of ​​the first clamping member, the non-clamping area of ​​the second clamping member is provided with a limiting groove penetrating the second clamping member and open at one end toward the end direction, the limiting groove is aligned with and lower than the guide groove, and the puncture needle passes through the guide groove and punctures the leaflet in the limiting groove.

[0021] In a preferred embodiment, the non-clamping areas of the first clamping member and the second clamping member have an inclination angle A relative to the corresponding clamping areas, the guide groove includes an inclination section adjacent to the non-clamping area of ​​the first clamping member, the inclination section has an inclination angle B relative to the inclination starting point of the guide groove in the first clamping member, the angle C of the puncture needle puncturing the leaflet satisfies C=A+B, and the angle C of the puncture needle puncturing the leaflet is between 45-90 degrees.

[0022] In a preferred embodiment, an open groove is formed on a surface of the first clamping member facing away from the second clamping member, and the open groove is used to observe the connection state between the transmission shaft and the transmission connecting member.

[0023] In a preferred embodiment, the first clamping member is further provided with a contrast channel, which is communicated with the non-clamping area and is used for introducing contrast agent, and the contrast channel is located below the guide groove.

[0024] In a preferred embodiment, when the valve leaflet is not clamped between the first clamping member and the second clamping member and the contrast agent flowing out of the contrast channel is observed under medical imaging, the contrast channel is further used as a blood withdrawal channel.

[0025] In a preferred embodiment, the artificial chordae are sutures, which include two suture segments, which are knotted and passed through a gasket, and the suture segments together with the gasket are pushed to the other side of the leaflet through the puncture needle.

[0026] In a preferred embodiment, the end of the first clamping member away from the second clamping member has a cylindrical end and a connector, the non-clamping area of ​​the first clamping member is formed on the side of the cylindrical end facing the second clamping member, the connector is formed on the other side of the cylindrical end, the guide groove, the transmission channel and the imaging channel extend from the connector through the cylindrical end to the non-clamping area, the guide groove is in an open state at the connector, and the connector is used to connect a delivery catheter.

[0027] The artificial tendon chord implantation device provided by the present invention has the following beneficial effects:

[0028] One of the clamping members of the leaflet capture assembly of the artificial chord implant device can be opened relative to the other to form an angle or closed to clamp the leaflet between the two. The relative opening angle of the two clamping members can be controlled and adjusted, and when the clamping position is not appropriate, the two can be reopened and closed relative to each other; the cooperation between the convex part and the groove can be used to detect whether the leaflet is clamped in the appropriate position. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the mitral valve and tricuspid valve in normal state;

[0030] Figure 2 is a schematic diagram of normal chordae tendineae in the heart;

[0031] Figure 3 is a schematic diagram of a ruptured chordae tendineae in the heart;

[0032] Figure 4 is a partial schematic diagram of an artificial chord implantation device provided by the first embodiment of the present invention;

[0033] Figure 5 yes Figure 4 A schematic diagram of the second clamping member of the leaflet capture assembly of the artificial chord implantation device being opened relative to the first clamping member;

[0034] Figure 6 yes Figure 5 Explosion diagram of

[0035] Figure 7 yes Figure 6 An enlarged schematic diagram of the first clamping member in FIG.

[0036] Figure 8 yes Figure 6 An enlarged schematic diagram of the second clamping member in FIG.

[0037] Fig. 9 yes Figure 6 An enlarged schematic diagram of the transmission assembly in FIG.

[0038] Fig.10 yes Figure 7 A schematic back plane diagram of the first clamping member;

[0039] Fig.11 yes Figure 4 A schematic diagram of the length and gap marking of the non-clamping area of ​​the leaflet capture component of the artificial chord implant device;

[0040] Fig.12 yes Figure 4 A schematic diagram of the length marking of the clamping area of ​​the leaflet capture component of the artificial chord implant device;

[0041] Fig.13 yes Figure 4 A partial top view schematic diagram of an artificial chord implantation device;

[0042] Fig.14 yes Figure 4 A schematic diagram showing the puncture angle of the puncture needle of the artificial chord implantation device and the inclination angle of the non-clamping area of ​​the first clamping member;

[0043] Fig.15 yes Fig.14 A cross-sectional view of the first clamping member along the central axis of the guide groove;

[0044] Fig.16 yes Figure 7 A schematic diagram of the first clamping member from another angle;

[0045] Fig.17 yes Figure 4 Schematic diagram of a delivery catheter of an artificial chord implant device;

[0046] Fig.18 yes Figure 4 A schematic diagram of an artificial chord implantation device including an operating handle;

[0047] Fig.19 yes Fig.18 A partial cross-sectional view of the artificial chord implantation instrument at the operating handle;

[0048] Fig. 20 yes Fig.18A schematic diagram of the artificial chord implantation device after removing the housing, operation button and artificial chord implantation component from the operation handle;

[0049] Fig.21 yes Fig. 20 A partial cross-sectional view showing that the puncture needle of the artificial chord implantation device is further extended to the valve leaflet capture component;

[0050] Fig. 22 is a partial stereoscopic schematic diagram of an artificial chord implantation device provided in a second embodiment of the present invention;

[0051] Fig.23 yes Fig. 22 A three-dimensional enlarged schematic diagram of a first clamping member;

[0052] Fig.24 yes Fig. 22 A three-dimensional enlarged schematic diagram of a second clamping member;

[0053] Fig.25 yes Fig. 22 A schematic diagram of a state in which the second clamping member of the artificial chord implantation device is closed relative to the first clamping member when the valve leaflet is not clamped;

[0054] Fig.26 It is a schematic diagram of a state in which the artificial chord implantation device provided by an embodiment of the present invention is loaded with a first bending adjustment sheath and a second bending adjustment sheath to deliver a leaflet capture component to the heart tissue;

[0055] Fig. 27 yes Fig.26 A schematic diagram of a state in which the second clamping member of the leaflet capture assembly of the artificial chord implantation device is opened relative to the first clamping member to form a clamping angle;

[0056] Fig.28 yes Fig. 27 A schematic diagram of a state in which a leaflet capture component of an artificial chord implant device is aligned with the leaflet;

[0057] Fig.29 yes Fig.28 A schematic diagram of a state in which a leaflet capturing component of an artificial chord implantation device clamps a leaflet;

[0058] Fig.30 yes Fig.28 An enlarged schematic diagram of the artificial chord implantation device when the leaflets initially fall between the leaflet capture components;

[0059] Fig.31 yes Fig.29 An enlarged schematic diagram of the artificial chord implant device puncturing the valve leaflet after the valve leaflet capture component is closed. DETAILED DESCRIPTION

[0060] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0061] It should be understood that expressions such as "including" and "may include" that may be used in the present application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In the present disclosure, terms such as "including" and / or "having" may be interpreted as indicating specific characteristics, numbers, operations, constituent elements, components, or combinations thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0062] In addition, in the present application, the expression "and / or" includes any and all combinations of the associated listed words. For example, the expression "A and / or B" may include A, may include B, or may include both A and B.

[0063] In the present application, expressions including ordinal numbers such as "first" and "second" can modify various elements. However, such elements are not limited by the above expressions. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used to distinguish one element from other elements. Similarly, without departing from the scope of the present disclosure, the first element can be referred to as the second element, and similarly, the second element can also be referred to as the first element.

[0064] When a component is referred to as being "connected" or "accessed" to another component, it should be understood that the component is not only directly connected to or accessed to the other component, but also another component may exist between the component and the other component. On the other hand, when a component is referred to as being "directly connected" or "directly accessed" to another component, it should be understood that there is no component between them.

[0065] In the field of interventional medical device technology, the direction close to the operator is generally defined as the proximal end, and the direction away from the operator is defined as the distal end. The direction of the rotation center axis of an object such as a cylinder or a tube is defined as the axial direction. The circumferential direction is the direction around the axis of an object such as a cylinder or a tube (perpendicular to the axis and also perpendicular to the cross-sectional radius).

[0066] See also Figure 4 and Figure 5The artificial chord implantation device 100 provided in the first embodiment of the present application includes a leaflet capture component 10 and an artificial chord implantation component 20. The leaflet capture component 10 includes a first clamp 11, a second clamp 12 and a transmission component 13. Through the transmission of the transmission component 13, the second clamp 12 can be opened to a certain angle relative to the first clamp 11, or closed to capture and clamp the leaflet between the first clamp 11 and the second clamp 12.

[0067] In this embodiment, the first clamping member 11 is a block-shaped base, the second clamping member 12 is a sheet-shaped cover on the first clamping member 11, and one end of the first clamping member 11 is connected to the delivery conduit 16. The second clamping member 12 is hinged on the first clamping member 11, and the transmission assembly 13 is located between the first clamping member 11 and the second clamping member 12, and one end of the transmission assembly 13 is connected to the second clamping member 11, and the other end is movably transmitted in the first clamping member 11.

[0068] For details, please refer to Figures 6 to 9 The first clamping member 11 is provided with a connection portion 112, a clamping area 114 and a non-clamping area 116 from the far end away from the operator to the proximal end close to the operator; the second clamping member 12 is provided with a connection portion 122, a clamping area 124 and a non-clamping area 126 from the far end away from the operator to the proximal end close to the operator. The clamping area 114 of the first clamping member 11 faces the clamping area 124 of the second clamping member 12, and the non-clamping area 116 of the first clamping member 11 faces the non-clamping area 126 of the second clamping member 12, and when the first clamping member 11 and the second clamping member 12 are relatively closed, there is a gap between the non-clamping areas 126 of the first clamping member 11 and the second clamping member 12 (see Fig.11 ).

[0069] At least one of the clamping area 114 of the first clamping member 11 and the clamping area 116 of the second clamping member 12 is provided with clamping teeth to provide clamping force to the leaflets. In this embodiment, the clamping area 114 of the first clamping member 11 and the clamping area 124 of the second clamping member 12 are respectively provided with clamping teeth, and there is a tooth groove between two adjacent clamping teeth. When the first clamping member 11 and the second clamping member 12 are relatively closed, the clamping teeth 110 of the first clamping member 11 are meshed with the tooth groove 121 of the second clamping member 12, and the tooth groove 111 of the first clamping member 11 is meshed with the clamping teeth 120 of the second clamping member 12.

[0070] The clamping teeth 110 of the first clamping member 11 and the clamping teeth 120 of the second clamping member 12 are both arranged side by side transversely along the surface of the clamping area, and both extend from one side to the other side of the clamping area.

[0071] The connecting portion 122 of the second clamping member 12 has two ribs 122a that are spaced apart from each other. The connecting portion 112 of the first clamping member 11 is block-shaped. The two ribs 122a have an end away from the clamping area 124 and are provided with an axis hole 122d. Then, the two ribs 122a are hinged to the axis holes 112a on both sides of the connecting portion 112 of the first clamping member 11 through a rotating shaft 122b, so that the second clamping member 12 can be rotated relative to the first clamping member 11 to be relatively opened or closed. The two ribs 122a have a certain inclination toward the first clamping member 11 relative to the clamping area 124. The two side edges of the connecting portion 112 of the first clamping member 11 have inclined support portions 112b respectively. When the first clamping member 11 and the second clamping member 12 do not clamp the leaflets and are relatively closed, the two ribs 122a are just received on the support portions 112b, so that the entire leaflet capturing assembly 10 has a smaller size.

[0072] The first clamping member 11 is provided with a transmission channel 115 from the proximal end to the distal end, the transmission channel 115 is connected to the clamping area 114, and has an opening in the clamping area 114, the opening extends to the connecting portion 112, and the opening interrupts a portion of the clamping teeth 110. The transmission channel 115 includes a curved section 115b near the distal end, and a straight section 115a connecting the curved section 115b and near the proximal end. The curved section 115b is composed of an arc segment, or an oblique segment, or a combination of an arc segment and an oblique segment, and the curved section 115b is inclined upward toward the second clamping member 12 relative to the straight section 115a.

[0073] The transmission assembly 13 includes a transmission shaft 132 and a transmission connector 134. The transmission shaft 132 is movably received in the transmission channel 115, specifically, a first end thereof is located in the transmission channel 115 of the first clamping member 11, and an opposite second end thereof extends out of the proximal end of the first clamping member 11, and a spring tube 132b is sleeved on the portion of the transmission shaft 132 extending out of the proximal end of the first clamping member 11, so that the transmission shaft 132 can move in the spring tube 132b without interference.

[0074] The first end of the transmission connecting member 134 is pivotally connected to the second clamping member 12 on the first pivot axis 134a, and the second end opposite thereto is movably accommodated in the transmission channel 115 and pivotally connected to the first end of the transmission shaft 132 on the second pivot axis 134b through the shaft hole 132a. Fig.10 An open groove 130 is provided on the surface of the first clamping member 11 facing away from the second clamping member 12, and the open groove 130 is used to observe the connection status between the transmission shaft 132 and the transmission connecting member 134, including whether the connection is in place and whether there are some abnormal conditions.

[0075] Since the connecting portion 122 of the second clamping member 12 is two ribs 122a arranged relatively spaced apart, the first end of the transmission connecting member 134 is provided with a connecting column 134c, and the connecting column 134c has an axial hole 134d formed inside, and then is pivoted to the axial holes 122c at the ends of the two ribs 122a near the clamping area 124 through the first pivot axis 134a. The second end of the transmission connecting member 134 is pivoted to the first end of the transmission shaft 132 through the second pivot axis 134b. The "pivot" here means that at least one of the two pivoted objects has a degree of freedom of rotation relative to the pivot axis. In this embodiment, the transmission connecting member 134 can rotate around the first pivot axis 134a, and the transmission connecting member 134 can rotate around the second pivot axis 134b. The first pivot axis 134a and the second pivot axis 134b can both be pins, and the second clamping member 12, the transmission connecting member 134 and the transmission shaft 132 are wound around the pins with the axial holes. The transmission of the transmission shaft 132 drives the transmission connector 134 to move, and the movement of the transmission connector 134 causes the second clamping member 12 to rotate around the hinged first clamping member 11, thereby opening and closing relative to the first clamping member 11. In this way, the transmission component 13 also becomes an opening and closing control element of the leaflet capture component 10.

[0076] The transmission connecting member 134 includes a curved portion 134a and a straight portion 134e connected to the curved portion 134a. The bottom surface of the curved portion 134a close to the curved section 115b of the transmission channel 115 has a rounded corner 134c. The surface of the curved portion 134a away from the curved section 115b has an arc surface 134d. The arc surface 134d starts to bend from the connecting column 134c. Since the connecting column 134c is connected to the second clamping member 12, at least a part of the arc surface 134d is located at the second clamping member 12. The upper surface 134f of the straight portion 134e connected to the arc surface 134d is a straight surface, and the lower surface connected to the rounded corner 134c is also a straight surface. At least a portion of the straight portion 134e is located on the first clamping member 11, and as the transmission assembly 13 moves, at least a portion of the straight portion 134e moves on the straight section 115a of the transmission channel 115. Since the curved section 115b of the transmission channel 115 is inclined upward relative to the straight section 115a toward the second clamping member 12, at least a portion of the curved portion 134a is located between the first clamping member 11 and the second clamping member 12.

[0077] In this embodiment, a limiting boss 115d is formed at the position where the curved section 115b of the transmission channel 115 is connected to the connecting portion 112, that is, at the end position of the curved section 115b. The limiting boss 115d is designed so that when the second clamping piece 12 is opened to the maximum angle relative to the first clamping piece 11, the limiting boss 115d just limits the transmission connection member 134, that is, at this time, the driving device of the transmission shaft 132 can no longer drive the transmission shaft 132 and its connected transmission connection member 134 to cross the limiting boss 115d, and at this time, the fillet 134c of the bottom surface of the curved portion 134a can just be tangent to the edge line of the limiting boss 115d. The maximum angle that the second clamping piece 12 can open relative to the first clamping piece 11 can be 60 degrees, and it can also be designed to be opened 90 degrees. Usually, for clamping a single leaflet, the second clamping piece 12 can be opened 60 degrees relative to the first clamping piece 11.

[0078] The non-clamping area 116 of the first clamping member 11 is an inclined surface as a whole, which is inclined from the clamping area 114 to the proximal direction; the non-clamping area 126 of the second clamping member 12 is also an inclined surface as a whole, which is inclined from the clamping area 124 to the proximal direction, and the non-clamping area 116 of the first clamping member 11 is oriented toward and parallel to the non-clamping area 126 of the second clamping member 12. In other embodiments, the non-clamping area 116 and the non-clamping area 126 may also be partially inclined and parallel.

[0079] See also Fig.11 and Fig.12 , the length L31 of the clamping area 114 of the first clamping member 11 from the distal end to the proximal end and the length L32 of the clamping area 124 of the second clamping member 12 from the distal end to the proximal end are respectively between 3-5 mm, and the length L31 of the clamping area 114 and the length L32 of the clamping area 124 can be equal or unequal. The length L11 of the non-clamping area 116 of the first clamping member 11 from the distal end to the proximal end and the length L12 of the non-clamping area 126 of the second clamping member 12 from the distal end to the proximal end are respectively between 2-5 mm. The length L12 of the non-clamping area 126 can be slightly larger than the length L11 of the non-clamping area 116, so that when the second clamping member 12 is closed on the surface of the first clamping member 11, the top of the non-clamping area 126 is higher than the top of the non-clamping area 116, which is conducive to the movable second clamping member 12 not being collided by the delivery sheath and moving open during the delivery process. The gap L2 between the non-clamping area 116 of the first clamping member 11 and the non-clamping area 126 of the second clamping member 12, that is, the gap L2 between the inclined surfaces is between 0.5-2 mm to accommodate the thickness of the heart valve leaflet.

[0080] The first clamping member 11 and the second clamping member 12 have a clamping force on the leaflets when closed. The clamping teeth 110 of the first clamping member 11 and the clamping teeth 120 of the second clamping member 12 make the clamping more stable. The non-clamping area 116 of the first clamping member 11 and the non-clamping area 126 of the second clamping member 12 have no clamping force on the leaflets, but have a certain supporting effect.

[0081] In this embodiment, please refer to Figure 8 A convex part 125 is protruded between the clamping area 124 and the connecting part 122 of the second clamping member 12, and the height of the convex part 125 is higher than the height of the clamping tooth 120. A groove 119 is provided between the clamping area 114 and the connecting part 112 of the first clamping member 11, and the transmission channel 115 is an opening interruption part of the groove 119 in the clamping area 114. When the first clamping member 11 and the second clamping member 12 do not clamp the leaflets and are relatively closed, the convex part 125 is accommodated in the groove 119. When there are leaflets between the convex part 125 and the groove 119, the first clamping member 11 and the second clamping member 12 cannot be completely closed. In this way, the convex part 125 can be used as a detection mark to detect whether the leaflets are clamped in a suitable position. For example, when it is found that the first clamping member 11 and the second clamping member 12 cannot be closed, it may be because too many leaflets are accumulated between the convex part 125 and the groove 119. At this time, the first clamping member 11 and the second clamping member 12 of the leaflet capture assembly 10 can be reopened so that the leaflets fall mainly between the clamping area 114 of the first clamping member 11 and the clamping area 124 of the second clamping member 12. The situation that too many leaflets are accumulated between the convex part 125 and the groove 119 can also be observed through medical images of the surgical process. The height of the convex part 125 is higher than the height of the clamping teeth 120, so it is recognizable under medical images. The depth of the groove 119 can be smaller than the sum of the thickness of the convex part 125 and the leaflets. Therefore, when leaflets are accumulated between the convex part 125 and the groove 119, the convex part 125 cannot be completely accommodated in the groove 119, that is, the first clamping member 11 and the second clamping member 12 cannot be completely closed when closed.

[0082] The convex part 125 is preferably a trihedron or a tetrahedron for better recognition under medical images. Of course, it can also be a cylindrical shape, etc. The positions of the convex part 125 and the groove 119 can also be interchanged, that is, the convex part 125 is set on the first clamping part 11, and the groove 119 is set on the second clamping part 12.

[0083] Please refer again Figure 7The first clamping member 11 is also provided with a contrast channel 140, which is connected to the non-clamping area 116 and is used to introduce contrast agent. When the valve leaflets are not clamped between the first clamping member 11 and the second clamping member 12, the contrast agent flowing out of the contrast channel 140 can be observed under medical images, such as digital subtraction angiography (DSA) rays. When the valve leaflets are clamped between the first clamping member 11 and the second clamping member 12, the contrast channel 140 will be covered or blocked by the valve leaflets, so it can be seen that a valve leaflet falls between the first clamping member 11 and the second clamping member 12. In addition, when contrast medium is observed to flow out of the contrast channel 140, the leaflets are not clamped at this time, and the contrast channel 140 can be used to withdraw blood from the operation, that is, it is used as a blood withdrawal channel at this time; when the contrast channel 140 is covered or blocked so that the contrast medium cannot be injected, it means that the leaflets are clamped, and it is recommended not to withdraw blood from the operation at this time. In this embodiment, the contrast channel 140 includes two contrast channels 140, and the two contrast channels 140 are located below the non-clamping area 116.

[0084] After the capture component 10 of the artificial chord implantation device 100 of the embodiment of the present invention captures the valve leaflet, the artificial chord implantation component 20 implants the artificial chord into the captured valve leaflet. The artificial chord implantation component 20 punctures the valve leaflet with a puncture needle, and then pushes the artificial chord out of the puncture needle to reach the other side of the valve leaflet.

[0085] Please also read Figure 8 and Fig.13 , the first clamping member 11 is provided with a guide groove 117, the guide groove 117 is connected to the non-clamping area 116 of the first clamping member 11, and has an opening in the non-clamping area 116. In this embodiment, the guide groove 117 is located above the non-clamping area 116, and the non-clamping area 126 of the second clamping member 12 is provided with a limiting groove 127 that penetrates the second clamping member 12 and is open at one end in the proximal direction, that is, the end direction of the second clamping member 12. When the second clamping member 12 and the first clamping member 11 are closed, the limiting groove 127 is lower than the guide groove 117 and is aligned with the guide groove 117 (see Fig.13 ), and the width or diameter D2 of the limiting groove 127 is greater than the diameter D1 of the puncture needle, so that the puncture needle can pass through the limiting groove 127, and the limiting groove 127 has a certain accommodation for the valve leaflets, so that the puncture needle is not easy to slip off when puncturing the valve leaflets. The puncture needle has a certain needle tip, and the needle tip is optimally located at the middle point of the limiting groove 127 at the puncture point of the valve leaflets, or two-thirds of the area of ​​the puncture needle is accommodated by the limiting groove 127 to enable the needle tip to puncture the valve leaflets, so that the puncture of the puncture needle will not slip off, and the puncture is stable.

[0086] like Fig.14 and Fig.15 As shown, the non-clamping area 126 of the second clamping member 12 has an inclination angle A relative to the clamping area 124, and the non-clamping area 116 of the first clamping member 11 is parallel to the non-clamping area 126 of the second clamping member 12, so the non-clamping area 116 of the first clamping member 11 also has an inclination angle A relative to the clamping area 114. The guide groove 117 includes an inclination section 117a adjacent to the non-clamping area 116 of the first clamping member 11, and the inclination section 117a is inclined upward relative to the inclination starting point of the guide groove 117 in the first clamping member 11 to form an inclination angle B relative to the inclination starting point, and the inclination angle B makes the needle exit angle of the puncture needle appropriately raised. The angle C between the needle tip and the leaflet when the puncture needle punctures the leaflet satisfies C=A+B. Preferably, the inclination angle A of the non-clamping area 116 is between 45 and 70 degrees, the inclination angle B of the guide groove 117 is between 0 and 20 degrees, and the angle C of the puncture needle puncturing the leaflet is between 45 and 90 degrees. In this embodiment, the inclination angle A of the non-clamping area 116 is 70 degrees or close to 70 degrees, the inclination angle B of the guide groove 117 is 20 degrees or close to 20 degrees, and the angle C of the puncture needle puncturing the leaflet is 90 degrees or close to 90 degrees, that is, the puncture needle is in a state of puncturing the leaflet basically vertically, which helps to prevent the needle from slipping during puncture, and the needle will not slip and injure the leaflet, causing secondary damage to the leaflet.

[0087] See also Fig.16 The end of the first clamping member 11 away from the second clamping member 12, that is, the proximal end of the first clamping member 11 has a connector 150, and the guide groove 117, the transmission channel 115 and the imaging channel 140 extend from the connector 150 to one side of the non-clamping area 116. The connector 150 is used to connect the delivery catheter 16 (see Fig.13 ).

[0088] Specifically, the proximal portion of the first clamping member 11 has a cylindrical end 150a, the non-clamping area 116 of the first clamping member 11 is formed on one side of the cylindrical end 150a facing the second clamping member 12, and the connector 150 is formed on the other side of the cylindrical end 150a. The top of the cylindrical end 150a is the highest point of the first clamping member 11. When the second clamping member 12 and the first clamping member 11 are closed, the top of the cylindrical end 150a is higher than the top of the second clamping member 12, which is beneficial during transportation, and the movable second clamping member 12 will not be collided by the transportation sheath. The connector 150 is recessed downward relative to the cylindrical end 150a to be used for sleeve-mounting the transportation catheter 16. After the transportation catheter 16 is sleeved with the connector 150, the transportation catheter 16 is substantially flush with the surface of the cylindrical end 150a. The guide groove 117, the transmission channel 115 and the radiographic channel 140 extend from the connector 150 through the cylindrical end 150a to one side of the non-clamping area 116. The transmission channel 115 and the two radiographic channels 140 are in the form of through holes in the connector 150, and the guide groove 117 is in the form of an incomplete arc opening at the connector 150. Since the guide groove 117 is bent upward at the inclined section 117a of the first clamping member 11, there may be more resistance when the puncture needle moves. Therefore, the open form of the connector 150 helps to reduce the resistance when the puncture needle moves.

[0089] See also Fig.17 The delivery catheter 16 is made of polymer material and is slender and flexible. One end 165 of the delivery catheter 16 can cover the inwardly recessed portion of the connector 150 by hot melting. The delivery catheter 16 has a plurality of mutually spaced cavities, which correspond to the guide groove 117, the transmission channel 115 and the two imaging channels 140 connected to the first clamp 11. The transmission cavity 161 of the delivery catheter 16 corresponding to the transmission channel 115 is used to accommodate the transmission shaft 132 extending from the first clamp 11. The transmission shaft 132 can be a metal rod, which passes through the delivery catheter 16 and is connected to the operating handle 18 (see Fig.18 ). The needle insertion cavity 162 of the delivery catheter 16 corresponding to the guide groove 117 is used to accommodate the puncture needle, and the puncture needle is also connected to the operating handle. The imaging cavity 163 of the delivery catheter 16 corresponding to the imaging channel 140 is used to introduce contrast agent, or to withdraw blood during surgery.

[0090] See also Fig.18The proximal end of the delivery catheter 16 away from the leaflet capture component 10 is connected to the operating handle 18. The operating handle 18 has a button 181 connected to the transmission shaft 132. The housing 180 of the operating handle 18 can be provided with a slide groove for the button 181 to slide. By pressing and pushing the button 181, the transmission shaft 132 can be driven to move axially, thereby pushing the transmission connector 134 to move, so that the second clamping member 12 of the leaflet capture component 10 can be opened or closed relative to the first clamping member 11. The operating handle 18 also has a gas-liquid valve 182, which can be used as a contrast agent inlet, and can also be used as a blood withdrawal channel and an exhaust channel during surgery. The operating end of the artificial chord implant component 20 can be movably mounted at the end of the housing 180 of the operating handle 18.

[0091] Please also read Figures 19 to 21 The artificial chord implant assembly 20 includes a puncture needle assembly 21 and an artificial chord pushing assembly 22. The puncture needle assembly 21 includes a puncture needle pushing handle 211, a guide assembly 212 and a puncture needle 213. The puncture needle pushing handle 211 is movably accommodated in the housing 180 of the operating handle 18. The puncture needle 213 is fixedly connected to the puncture needle pushing handle 211. The guide assembly 212 includes a guide sleeve 212a and a guide shaft 212b. The guide sleeve 212a is fixedly connected to the puncture needle pushing handle 211. The guide shaft 212b is fixed in the housing 180 of the operating handle 18, and one end of the guide sleeve 212a is accommodated in the guide sleeve 212a. The inner diameter of the guide sleeve 212a is slightly larger than the outer diameter of the puncture needle 213, but it can support the puncture needle 213, so as to guide the puncture needle 213. When the puncture needle pushing handle 211 is pushed, the guide sleeve 212a moves axially along the outer diameter of the guide shaft 212b, and the puncture needle 213 is pushed along the inner diameter of the guide shaft 212b through the delivery catheter 16 to reach the guide groove 117 of the leaflet capture assembly 10.

[0092] The artificial tendon chord pushing assembly 22 includes a pushing handle 221, a pushing shaft 222 and a pushing catheter 223. The pushing handle 221 may be a ring. One end of the pushing shaft 222 is fixedly connected to the pushing handle 221, and the other end extends into the puncture needle pushing handle 211 and is fixedly connected to the pushing catheter 223. The pushing catheter 223 is movably accommodated in the puncture needle 213. The artificial tendon chord 225 may be loaded in the pushing catheter 223, and the artificial tendon chord 225 does not need to be fixed in the pushing catheter 223. The end of the artificial tendon chord 225 extends out of the pushing catheter 223 and is accommodated in the puncture needle 213. The artificial tendon chord 225 may be inserted on the gasket 225a, and the gasket 225a is placed at the end of the pushing catheter 223. The end of the artificial tendon chord 225 may be knotted. The gasket 225a may be a metal pipe. The artificial tendon chord 225 and the gasket 225a are pushed out of the puncture needle 213 by the pushing catheter 223.

[0093] See also Figure 22 to Figure 25 The artificial chord implantation device 500 provided in the second embodiment of the present invention is different from the artificial chord implantation device 100 in the first embodiment in that the convex part 125a is arranged on the first clamping member 11a, and the convex part 125a includes two, and the two convex parts 125a are respectively located on both sides of the transmission channel 115, and the groove 119a is arranged on the second clamping member 12a, and the groove 119a includes two, and the two grooves 119a are arranged corresponding to the two convex parts 125a. The two convex parts 125a are cylindrical, and the two grooves 119a are circular hole-type, and are through holes. The size of each groove 119a of the two grooves 119a of the second embodiment is smaller than the size of the groove 119 of the first embodiment, so that the leaflets are less likely to accumulate and fall into the groove 119a. If the leaflets cover the groove 119a, the convex part 125a cannot cooperate with the groove 119a and can be observed by medical imaging. At this time, the position of the leaflets falling into the leaflet capture component can be adjusted by the transmission component 13.

[0094] Please also read Figure 26 to Figure 29 The delivery catheter 16 of the artificial chord implantation device 100 can be loaded in a bending adjustment sheath, and the bending adjustment sheath can include a first bending adjustment sheath 200 and a second bending adjustment sheath 200. The first bending adjustment sheath 200 and the second bending adjustment sheath 200 play a role in guiding and bending in the heart tissue during the delivery process of the artificial chord implantation device. The first bending adjustment sheath 200, the second bending adjustment sheath 200 and the artificial chord implantation device 100 can be operated independently in vitro, and the leaflet capture assembly 10 is delivered to the top of the heart leaflet 400 to be repaired under the observation of medical imaging. Then, the second clamping member of the leaflet capture assembly 10 is opened relative to the first clamping member. At this time, the operating handle of the artificial chord implantation device 100 can be fine-tuned so that the second clamping member is at an angle basically perpendicular to the leaflet to align with the leaflet and retract the leaflet. At this time, the leaflet capture assembly 10 is closed to clamp the leaflet, and then the artificial chord implantation assembly 20 can be operated to puncture the leaflet with the puncture needle 213 (see Fig.31 ), and push the artificial chordae to the other side of the valve leaflet.

[0095] Please also read Figure 6 , Fig. 9 , Fig.30 and Fig.31When the leaflet capture assembly 10 of the artificial chord implantation device 100 of the embodiment of the present invention enters the heart valve to be repaired, such as the mitral valve, the second clamping member 12 opens relative to the first clamping member 11 to align with the leaflets of the mitral valve. At this time, the leaflets to be repaired, such as the anterior leaflet or the posterior leaflet, can fall between the first clamping member 11 and the second clamping member 12. Due to the curved design of the transmission connecting member 134 of the transmission assembly 13, during the closing process of the second clamping member 12 relative to the first clamping member 11, the curved portion 134a will push the leaflets from the arc surface 134d to the first straight surface 134e, so that the leaflets are basically clamped between the clamping area 114 of the first clamping member 11 and the clamping area 124 of the second clamping member 12, preventing too many leaflets from accumulating between the connecting portion 112 of the first clamping member 11 and the connecting portion 122 of the second clamping member 12. When the convex part 125 on the second clamping member 12 cannot close with the groove 119 on the first clamping member 11, it also serves as a prompt, prompting the leaflet capture assembly 10 to fine-tune the angle, and the second clamping member 12 can reopen the accommodating leaflet and close it again relative to the first clamping member 11.

[0096] As mentioned above, the first clamping member 11 and the non-clamping area 116, 126 of the leaflet capture assembly 10 of the artificial chord implantation device 100 of the embodiment of the present invention just form a puncture area, and the inclined design of the non-clamping area 116, 126, the angle design of the guide groove 117 and the design of the limit groove 127 (see Figure 6-8 ) The puncture needle is basically perpendicular to the valve leaflet during puncture, making the puncture easier and more accurate.

[0097] After the artificial chord implantation assembly 20 of the artificial chord implantation device 100 of the embodiment of the present invention pushes the artificial chord 225 to the other side of the valve leaflet, the artificial chord 225 can be fixed to the heart tissue by another device, directly replacing the work of the native chord of the heart, and the gasket 225a of the artificial chord 225 can help fix the artificial chord 225 to the papillary muscle. The artificial chord 225 can be one or two sutures, and its material can be PTFE, e-PTFE, PET, UHMWPE, etc.

[0098] After the artificial chord implantation is completed in the artificial chord implantation device 100 of the embodiment of the present invention, the artificial chord 225 remains in the heart tissue. At this time, the puncture needle is withdrawn, and then the leaflet capture component 10 is withdrawn, so that the artificial chord implantation device 100 is separated from the heart tissue as a whole and withdrawn.

[0099] It is understandable that the above diagram only uses the puncture direction of the valve leaflet from the atrial side to the ventricular side when the artificial chord is implanted as an example. The artificial chord implantation device of the present application can also be used to puncture the valve leaflet from the ventricular side to the atrial side, for example, using a delivery path through the right ventricle-ventricular septum-left ventricle-mitral valve, or using a delivery path through the apex-left ventricle-mitral valve. Of course, the artificial chord implantation device of the present application can also be used for the implantation of artificial chords of the tricuspid valve. Except for the difference in the path of the interventional surgery, the structure of the artificial chord implantation device for the tricuspid valve is the same as that of the artificial chord implantation device for the mitral valve, which will not be repeated here.

[0100] The above are only the preferred implementation modes of the present application, and are not intended to limit the present application in any form. Although the present application has been disclosed as above in terms of the preferred implementation modes, it is not intended to limit the present application. Any technician familiar with the art can use the methods and technical contents disclosed above to make many possible changes and modifications to the technical solutions of the present application, or modify them into equivalent implementation modes with equivalent changes, without departing from the scope of the technical solutions of the present application. Therefore, any simple modifications, equivalent changes and modifications made to the above implementation modes based on the technical essence of the present application, which do not depart from the contents of the technical solutions of the present application, are still within the scope of protection of the technical solutions of the present application.

Claims

1. An artificial chord implantation device, characterized in that: It includes: A leaflet capturing component, the leaflet capturing component comprising a first clamping member, a second clamping member and a transmission component, through the transmission of the transmission component, the second clamping member can be opened relative to the first clamping member to form an angle, or closed to capture and clamp the leaflet of the valve between the first clamping member and the second clamping member, one of the first clamping member and the second clamping member is protrudingly provided with a convex part, and the other of the first clamping member and the second clamping member is provided with a groove, and when the first clamping member and the second clamping member are relatively closed and the leaflet does not fall between the convex part and the groove, the convex part is received in the groove; as well as An artificial chord implantation assembly comprises a puncture needle and an artificial chord housed in the puncture needle and capable of being pushed; after the leaflet capture assembly captures and clamps the leaflet, the puncture needle punctures the leaflet, and the artificial chord is pushed to the other side of the leaflet; and the leaflet capture assembly is separated from and withdrawn from the leaflet after the artificial chord is pushed to the other side of the leaflet.

2. The artificial chord implantation device according to claim 1, characterized in that: The surfaces facing each other of the first clamping member and the second clamping member are both provided with clamping areas and non-clamping areas, at least one of the clamping areas is provided with clamping teeth to clamp the leaflet between the two clamping areas, and when the first clamping member and the second clamping member are relatively closed, there is a gap between the non-clamping areas of the first clamping member and the second clamping member to accommodate a part of the leaflet that is not clamped, and the gap is between 0.5-2mm.

3. The artificial chord implantation device according to claim 2, characterized in that: The first clamping member and the second clamping member are respectively provided with connecting parts, and the connecting parts are located on the side of the clamping area away from the non-clamping area. The connecting part of the second clamping member is hinged on the connecting part of the first clamping member, and one end of the transmission assembly is connected to the connecting part of the second clamping member to drive the second clamping member to open and close relative to the first clamping member.

4. The artificial chord implantation device according to claim 3, characterized in that: A transmission channel is provided in the first clamping member, the transmission channel is communicated with the clamping area of ​​the first clamping member and extends to the connecting portion, the transmission assembly includes a transmission shaft and a transmission connecting member, the transmission shaft is movably accommodated in the transmission channel, one end of the transmission connecting member is pivotally connected to the second clamping member through a first pivot shaft, and the other end of the transmission connecting member is movably accommodated in the transmission channel and is pivotally connected to one end of the transmission shaft through a second pivot shaft.

5. The artificial chord implantation device according to claim 4, characterized in that: The connecting portion of the second clamping member has two ribs that are relatively spaced apart, one end of the two ribs away from the clamping area is hinged to the two sides of the connecting portion of the first clamping member through a rotating shaft, and one end of the two ribs close to the clamping area is pivotally connected to the transmission connecting member through the first pivot shaft.

6. The artificial chord implantation device according to claim 4, characterized in that: The clamping areas of the first clamping member and the second clamping member are provided with a plurality of clamping teeth adapted to each other to clamp the leaflets, and the transmission channel has an opening in the clamping area of ​​the first clamping member, and the opening interrupts part of the clamping teeth of the first clamping member.

7. The artificial chord implantation device according to claim 6, characterized in that: The convex part is arranged between the clamping area and the connecting part of one of the first clamping part and the second clamping part, and the groove is arranged between the clamping area and the connecting part of the other of the first clamping part and the second clamping part, and the height of the convex part is higher than the height of the clamping teeth. When the first clamping part and the second clamping part are relatively closed and the leaflet falls between the convex part and the groove, the convex part cannot be accommodated in the groove, so that the first clamping part and the second clamping part cannot be completely closed.

8. The artificial chord implantation device according to claim 7, characterized in that: The convex component is arranged on the second clamping member, the groove is arranged on the first clamping member, and the transmission channel interrupts the groove.

9. The artificial chord implantation device according to claim 7, characterized in that: The convex component is arranged on the first clamping member, and the convex component includes two, and the two convex components are respectively located on both sides of the transmission channel; the groove is arranged on the second clamping member, and the groove includes two, and the two grooves are arranged corresponding to the two convex components.

10. The artificial chord implantation device according to claim 4, characterized in that: A limiting boss is provided at the connection between the transmission channel and the connecting part, and the limiting boss is used to limit the transmission connecting member to limit the maximum angle of the second clamping piece relative to the first clamping piece. The transmission channel includes a curved section, and the limiting boss is located at the end position of the curved section at the connecting part. The transmission connecting member includes a curved section and a straight section connected to the curved section. The bottom surface of the curved section close to the curved section has a rounded corner, and the surface of the curved section facing away from the curved section has an arc surface. The surface of the straight section connected to the arc surface is a straight surface, and at least a portion of the arc surface is located at the second clamping member, and at least a portion of the straight portion is located at the first clamping member.

11. The artificial chord implantation device according to claim 2, characterized in that: The non-clamping areas of the first clamping member and the second clamping member are respectively inclined relative to the clamping area, and the non-clamping areas of the first clamping member and the second clamping member are parallel to each other. The first clamping member is provided with a guide groove, and the guide groove is connected with the non-clamping area of ​​the first clamping member. The non-clamping area of ​​the second clamping member is provided with a limiting groove penetrating the second clamping member and open at one end toward the end direction. The limiting groove is aligned with and lower than the guide groove. The puncture needle passes through the guide groove and punctures the leaflet in the limiting groove.

12. The artificial chord implantation device according to claim 11, characterized in that: The non-clamping areas of the first clamping member and the second clamping member have an inclination angle A relative to the corresponding clamping areas, the guide groove includes an inclination section adjacent to the non-clamping area of ​​the first clamping member, the inclination section has an inclination angle B relative to the inclination starting point of the guide groove in the first clamping member, the angle C of the puncture needle puncturing the valve leaflet satisfies C=A+B, and the angle C of the puncture needle puncturing the valve leaflet is between 45-90 degrees.

13. The artificial chord implantation device according to claim 1, characterized in that: The artificial chordae are sutures, which are knotted and passed through the gasket. The sutures together with the gasket are pushed to the other side of the leaflet through the puncture needle.

Images