Loopable medical devices and medical systems

Abstract

The present invention relates to a medical device that can be looped and a medical system including the medical device that can be looped. The medical device that can be looped includes a main body, a first connecting part, and a second connecting part. The main body is configured to be able to transform from a straight structure to a curved structure and includes a first end and a second end arranged opposite to each other along the axial direction. The first connecting part is connected to the first end of the main body. The second connecting part is connected to the second end of the main body. The first connecting part has a first structure that protrudes laterally from the first end of the main body and faces the second connecting part, and when the main body transforms from a straight structure to a curved structure, the second connecting part can be connected to the first connecting part facing the second connecting part and locked with each other, so that the first connecting part, the second connecting part and the main body in the curved structure form a loop together. The looping operation of the medical device that can be looped is relatively simple.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a ring-forming medical device and a medical system. Background Art

[0002] In order to improve the anchoring stability of artificial heart valves, valve-in-ring surgery has emerged: first, a ring-forming device is implanted, and then the artificial heart valve is released into the ring-forming device, and the artificial heart valve is anchored by the ring-forming device.

[0003] An existing ring-in-valve technology requires first delivering an extended guide wire into the body, allowing the extended guide wire to wrap around the heart tissue, and then leading both ends of the guide wire out of the body. Then, the ring-forming device to be implanted is folded in half, and the two ends of the guide wire are respectively introduced from the two ends of the ring-forming device and then passed out from the proximal opening set in the middle between the two ends of the ring-forming device. Then, the ring-forming device is pushed and locked along the guide wire. This process is relatively complicated. Summary of the Invention

[0004] In view of this, the present invention aims to provide a loopable medical device and a medical system that can solve the above problems or at least alleviate the above problems to a certain extent.

[0005] To this end, on the one hand, the present invention provides a ring-forming medical device, comprising a main body, a first connecting part, and a second connecting part, wherein the main body is configured to be able to transform from a straight structure to a curved structure and comprises a first end and a second end arranged opposite to each other in the axial direction, the first connecting part is connected to the first end of the main body, and the second connecting part is connected to the second end of the main body, wherein the first connecting part has a first structure that protrudes laterally from the first end of the main body and faces the second connecting part, and when the main body transforms from the straight structure to the curved structure, the second connecting part can be connected to the first connecting part facing the second connecting part and locked with each other, so that the first connecting part, the second connecting part and the main body in the curved structure form a ring together.

[0006] On the other hand, the present invention also provides a medical system, including the aforementioned loopable medical device and a conveying device, wherein the conveying device includes an outer tube, and a capturing component for capturing a guide wire that is movably arranged in the inner cavity of the outer tube, and the distal end of the outer tube is provided with a second connecting portion for detachably connecting to the first connecting portion of the loopable medical device.

[0007] The loopable medical device of an embodiment of the present invention effectively simplifies the looping operation process of the loopable medical device based on its specially arranged first connecting part. For example, in actual surgery, it is only necessary to deliver the distal end of the guide wire into the body and bend it into a roughly ring shape, and the proximal end of the guide wire remains outside the body. Then, the loopable medical device of an embodiment of the present invention is pushed along the guide wire to connect the second connecting part and the first connecting part to form a ring, without the need to guide both ends of the guide wire out of the body. The looping operation is relatively simple and there is no need to use unconventional extended guide wires. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1A is a schematic diagram of a loopable medical device according to a first embodiment of the present invention, wherein the main body is in a straight configuration and the first connecting portion is in a first configuration;

[0009] Figure 1B yes Figure 1A Another schematic diagram of the ring-forming medical device shown, wherein the first connecting portion is flipped or swung relative to the main portion to an end axially protruding from the main portion;

[0010] Figure 1C yes Figure 1A Another schematic diagram of a loopable medical device is shown, wherein the main body is in a curved configuration, and the first connecting portion is connected to the second connecting portion, and the main body, the first connecting portion, and the second connecting portion together form a closed loop;

[0011] Figure 2A yes Figure 1A A perspective schematic diagram of the main body of the ring-forming medical device shown;

[0012] Figure 2B yes Figure 2A a side view of the main body portion shown;

[0013] Figure 2C yes Figure 2A a top view of the main body portion shown;

[0014] Figure 2D yes Figure 2A A variation of the main body portion shown;

[0015] Figure 3A yes Figure 1A A perspective schematic diagram of a first connecting portion of the loopable medical device shown;

[0016] Figure 3B yes Figure 3A a side view of the first connecting portion;

[0017] Figure 3C yes Figure 3AA partial schematic diagram of the connection between the first connecting portion and the main body, wherein the first connecting portion is abutted against one side of the main body;

[0018] Figure 3D yes Figure 3A A partial schematic diagram of the connection between the first connecting portion and the main body is shown, wherein the first connecting portion is flipped or swung at an acute angle relative to the main body;

[0019] Figure 3E yes Figure 3A A partial schematic diagram of the connection between the first connecting portion and the main body is shown, wherein the first connecting portion is flipped or swung relative to the main body to be substantially on the same arc surface as the main body;

[0020] Figure 3F This is a partial schematic diagram of the first connecting portion and the main body being connected by suture binding;

[0021] Figure 3G yes Figure 3F A schematic diagram showing that the first connecting portion is flipped or swung at an angle relative to the main body;

[0022] Figure 3H It is a partial schematic diagram of another way of connecting the first connecting portion and the main body;

[0023] Figure 3I yes Figure 3H A schematic diagram showing that the first connecting portion is flipped or swung at an angle relative to the main body;

[0024] Figure 3J This is a partial schematic diagram of another way of connecting the first connecting portion and the main body;

[0025] Figure 3K yes Figure 3J A schematic diagram showing that the first connecting portion is flipped or swung at an angle relative to the main body;

[0026] Figure 4A yes Figure 1A A perspective schematic diagram of the second connecting portion of the loopable medical device shown;

[0027] Figure 4B yes Figure 4A A partial schematic diagram showing the connection between the second connecting portion and the main body;

[0028] Figure 4C yes Figure 4A A three-dimensional schematic diagram showing a locked connection between the second connecting portion and the first connecting portion;

[0029] Figure 4D yes Figure 4C A cross-sectional view showing the second connecting portion locked with the first connecting portion;

[0030] Figure 4E yes Figure 4A A variation of the second connecting portion shown;

[0031] Figure 4F yes Figure 4E A cross-sectional view showing the second connecting portion locked with the first connecting portion;

[0032] Figure 4G yes Figure 4A Another variation of the second connecting portion shown;

[0033] Figure 4H yes Figure 4G A cross-sectional view showing the second connecting portion locked with the first connecting portion;

[0034] Figure 4I yes Figure 4A Yet another variation of the second connecting portion shown;

[0035] Figure 4J yes Figure 4I A cross-sectional view showing the second connecting portion locked with the first connecting portion;

[0036] Figure 5A yes Figure 1A A schematic diagram of a cover film of a loopable medical device is shown, wherein the cover film is in the form of a split piece;

[0037] Figure 5B yes Figure 1C Another variation of the loopable medical device is shown, wherein the cover is in the form of a single piece;

[0038] Figure 6A is a schematic diagram of a ring-forming medical device according to a second embodiment of the present invention, wherein the main body is in a straight configuration and the first connecting portion protrudes axially from one end of the main body;

[0039] Figure 6B yes Figure 6A A top view of the loopable medical device shown;

[0040] Figure 6C yes Figure 6A Another schematic diagram of the loopable medical device is shown, wherein the main body portion is in a straight configuration and the first connecting portion is in a first configuration;

[0041] Figure 6D yes Figure 6C A partial enlarged view of the ring-forming medical device is shown, showing a through-channel formed between two connecting strips;

[0042] Figure 6E yes Figure 6CAnother schematic diagram of the loopable medical device, wherein the main body is in a curved configuration, and the first connecting portion is connected to the second connecting portion, the main body, the first connecting portion, and the second connecting portion together forming a closed loop;

[0043] Figure 7A is a schematic diagram of a loopable medical device according to a third embodiment of the present invention, wherein the main body is in a straight configuration and the first connecting portion is in a first configuration;

[0044] Figure 7B yes Figure 7A a partial enlarged view of the loopable medical device, showing a second connecting portion of the loopable medical device including a plurality of locking portions;

[0045] Figure 7C Figure 7A Another schematic diagram of a loopable medical device is shown, wherein the main body is in a curved configuration, and the first connecting portion is connected to the second connecting portion, and the main body, the first connecting portion, and the second connecting portion together form a closed loop;

[0046] Figure 8A is a schematic diagram of a conveying device according to an embodiment of the present invention;

[0047] Figure 8B yes Figure 8A A schematic diagram of the outer tube assembly of the delivery device shown;

[0048] Figure 8C yes Figure 8B A partial enlarged view of the outer tube assembly shown;

[0049] Figure 8D yes Figure 8A A schematic diagram of a locking tube assembly of the delivery device shown;

[0050] Figure 8E yes Figure 8A A schematic diagram of the capture assembly of the delivery device shown, wherein the capture is in an expanded state;

[0051] Figure 8F yes Figure 8E Another schematic diagram of the capture assembly shown, wherein the capture device is in a retracted state;

[0052] Figure 8G is a schematic diagram of a medical system according to an embodiment of the present invention, wherein the loopable medical device and the delivery device are not yet connected;

[0053] Figure 8H yes Figure 8G Another schematic diagram of the medical system is shown, wherein the loopable medical device and the delivery device are connected to each other;

[0054] Figures 9A-9Dis a schematic diagram of an implantation process of a loopable medical device according to an embodiment of the present invention or an operation process of a medical system according to an embodiment of the present invention;

[0055] Figure 10A is a schematic diagram of a ring-forming medical device according to an embodiment of the present invention being applied to valve replacement surgery;

[0056] Figure 10B is a schematic diagram of a loopable medical device according to an embodiment of the present invention applied to chordae tendineae manipulation surgery; and

[0057] Figure 10C Schematic diagram of a loopable medical device according to an embodiment of the present invention applied to papillary muscle tightening and regulation surgery. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In addition, the embodiments described below can be combined with each other as long as there is no contradiction or conflict, and the same or similar concepts or processes may not be repeated in some embodiments.

[0059] First of all, it should be noted that, in this article, "proximal end" refers to the end of the device or element close to the operator. "Distal end" refers to the end of the device or element away from the operator. "Axial" refers to the direction that coincides with or is parallel to the central axis of the device or element. When the device or element is in a straight configuration, "axial" coincides with or is parallel to the line connecting the proximal center and the distal center. "Radial" refers to the direction that is perpendicular or approximately perpendicular to the axial direction and along the radius or diameter of the device or element. "Circumferential" refers to the direction surrounding the axial direction. "Lateral" refers to the direction that is perpendicular or approximately perpendicular to the axial direction. For axisymmetric devices or elements, such as cylindrical devices or elements, "lateral" and "radial" may coincide.

[0060] It is worth noting that the above-mentioned terms indicating orientation or positional relationship are only for the purpose of facilitating the description of the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0061] refer to Figures 1A to 1C The loopable medical device 1000 of the first embodiment of the present invention comprises a main body 1100, a first connecting portion 1200 and a second connecting portion 1300. The main body 1100 can be connected as follows: Figure 1A or Figure 1B The straight configuration shown is transformed into the Figure 1C The first connecting portion 1200 is provided at the first end 1101 of the main body 1100, and the second connecting portion 1300 is provided at the second end 1102 of the main body 1100. When the main body 1100 is in a straight configuration, the first connecting portion 1200 has the following features: Figure 1A The first configuration shown is a configuration that laterally protrudes from the first end 1101 of the main body 1100 and faces the second connection portion 1300. Here, the definition of "laterally" is as described above, and "facing" means that when the main body 1100 is in the straight configuration, the free end of the first connection portion 1200 is closer to the second connection portion 1300 relative to the first end 1101 of the main body 1100. Therefore, when the main body 1100 changes from the straight configuration to the curved configuration, the second connection portion 1300 can gradually approach the free end of the first connection portion 1200 until it is connected to the first connection portion 1200 and locked with each other, thereby forming a Figure 1C The closed loop is shown.

[0062] The loopable medical device 1000 of this embodiment is based on its specially arranged first connecting portion 1200, that is, the first connecting portion 1200 has a first end 1101 that protrudes laterally from the main body 1100 and faces the first structure of the second connecting portion 1300, which effectively simplifies the looping operation. For example, in actual surgery, it is only necessary to implant the distal end of the guide wire into the body and bend it into a roughly ring shape, and leave the proximal end of the guide wire outside the body. Then, the loopable medical device 1000 of this embodiment is pushed along the guide wire to connect the second connecting portion 1300 and the first connecting portion 1200 to form a ring (the specific operation method will be described in detail below), without the need to guide both ends of the guide wire out of the body, so that the looping operation is relatively simple, and a conventional guide wire can meet the use requirements without the need for a special unconventional extended guide wire.

[0063] Preferably, the first connecting portion 1200 is operably / movably connected to the first end 1101 of the main body 1100, so that the first connecting portion 1200 can be flipped or swung relative to the first end 1101 of the main body 1100 to a certain position. Figure 1B As shown, the first connecting portion 1200 protrudes axially from the first end 1101 of the main body 1100 (or in other words, when the main body 1100 is in the curved configuration, the first connecting portion 1200 gradually moves away from the first end 1101 of the main body 1100 along or substantially along the axial direction of the main body 1100). Thus, when the main body 1100 is transformed from the straight configuration to the curved configuration, the first connecting portion 1200 can be moved from the straight configuration to the curved configuration. Figure 1A The first configuration shown is transformed into the Figure 1CIn the second configuration shown, in the first configuration, the axis of the first connecting portion 1200 is parallel or substantially parallel to the axis of the main body 1100 in the straight configuration (substantially parallel can be interpreted as the acute angle between the two axes being no greater than 30°), and is laterally spaced. The first connecting portion 1200 is tilted or swung 180° or nearly 180° relative to the main body 1100. In the second configuration, the axis of the first connecting portion 1200 is coincident or substantially coincident (i.e., nearly coincident) with the axis of the main body 1100 in the curved configuration (since the main body 1100 is curved, the axis of the main body 1100 is also curved, not straight), and the angle between the first connecting portion 1200 and the main body 1100 is 0° or nearly 0°. This helps the ring-forming medical device 1000 form a smoother ring to meet different surgical requirements, for example, better adapting to the periphery of a prosthetic heart valve and providing a more stable anchoring effect.

[0064] As previously described, during surgery, the loopable medical device 1000 of this embodiment can be advanced along a guidewire (whose distal end is curved into a generally circular shape) to form a loop. In other words, the main body 1100, first connecting portion 1200, and second connecting portion 1300 of the loopable medical device 1000 are all provided with a channel for the guidewire to pass through (described in detail below). Preferably, during advancement, when the main body 1100 transitions from a straight configuration to a curved configuration, the physical length between the first end 1101 and the second end 1102 of the main body 1100 remains unchanged. In the straight configuration, "physical length" refers to the straight-line distance between the first end 1101 and the second end 1102 of the main body 1100; in the curved configuration, "physical length" refers to the arc length between the first end 1101 and the second end 1102 of the main body 1100. This prevents the main body 1100 from stacking during advancement, effectively reducing the difficulty of pushing the main body 1100. This can be achieved by the structure and / or material of the main body 1100.

[0065] For example, Figures 2A to 2CAs shown, the main body 1100 of this embodiment includes a tubular structure 1110, and the tubular structure 1110 includes a first longitudinal ridge 1111 and a plurality of annular segments 1112 connected to the first ridge 1111. The first ridge 1111 extends continuously in the axial direction and is connected to the plurality of annular segments 1112. It can transmit force and movement in the axial direction to provide sufficient support so that the physical length between the first end 1101 and the second end 1102 of the main body 1100 remains unchanged to prevent stacking. The plurality of annular segments 1112 are arranged at intervals along the length direction of the first ridge 1111, preferably at even intervals, and a cutting groove 1113 is formed between adjacent annular segments 1112, which helps to improve the bendability of the main body 1100. The inner cavities of the plurality of annular segments 1112 are connected to form a first channel 1114 for the guide wire to pass through. In other words, the tubular structure 1110 can be made using a cutting process. Preferably, the tubular structure 1110 is made of a hard metal or polymer material with certain supporting properties, such as one or more of nickel-titanium alloy, stainless steel, cobalt-chromium alloy, polytetrafluoroethylene, polyetheretherketone, polyethylene and nylon.

[0066] Preferably, the main body 1100 further includes a strip structure 1120, which is formed by further axially extending one end of the first ridge 1111 in a direction away from the plurality of annular segments 1112. In particular, the strip structure 1120 is connected to the first connecting portion 1200. That is, the first end 1101 of the main body 1100 is provided by the strip structure 1120, which helps the main body 1100 bend to form a smooth transition with the first connecting portion 1200.

[0067] It is understandable that the length ratio of the tubular structure 1110 and the strip structure 1120 in the main body 1100 can be varied according to the surgical requirements, and is not limited to Figures 2A-2C The tubular structure 1110 shown occupies a larger proportion and the strip structure 1120 occupies a smaller proportion. For example, in other embodiments, the strip structure 1120 may occupy most of the length of the main body 1100, while the tubular structure 1110 occupies a small part of the length of the main body 1100. Alternatively, the main body 1100 may only include the tubular structure 1110 or only include the strip structure 1120 (in the case of only including the strip structure 1120, the coating structure covering the outside of the strip structure 1120 forms a channel for the guide wire to pass through). The tubular structure 1110 is not limited to the structure shown in the figure, as long as it can be bent and has a certain degree of support. For example, Figure 2DA modified main body 1100a is shown. As can be seen from the figure, the tubular structure 1110a of the main body 1100a includes a first ridge 1111a and a second ridge 1115 extending axially and arranged opposite each other, and a plurality of spaced annular segments 1112a connecting the first ridge 1111a and the second ridge 1115. This main body 1100a provides stronger support and is easier to push.

[0068] In this embodiment, the main body 1100 and the first connecting portion 1200 are designed separately. The first end 1101 of the main body 1100 (specifically the strip structure 1120) is provided with a first connecting hole 1121 ( Figure 2C It is visible), and is used to be movably connected to the first connecting portion 1200. It can be understood that in other embodiments, the main body and the first connecting portion can also be designed as one piece.

[0069] Specifically, please refer to Figures 3A to 3E In this embodiment, the first connecting part 1200 includes a cylinder 1210 and a connecting rod 1220 connected to the cylinder 1210. The cylinder 1210 has a cavity 1211 that runs through it in the axial direction to form a second channel 1211 for the guide wire to pass through and for the second connecting part 1300 to enter and / or pass through. The connecting rod 1220 is used to plug and cooperate with the first connecting hole 1121 of the main body 1100 to connect the first connecting part 1200 and the main body 1100. In this embodiment, the connecting rod 1220 is roughly T-shaped, including a sliding section 1221 protruding and extending from the cylinder 1210 and a limiting section 1222 laterally connected to the sliding section 1221. The length of the limiting section 1222 is greater than the maximum width of the first connecting hole 1121. During assembly, the limiting section 1222 is passed vertically (i.e., the length direction of the limiting section 1222 is parallel or approximately parallel to the length direction of the first connecting hole 1121) through the first connecting hole 1121, and the sliding section 1221 is inserted into the first connecting hole 1121. Then, the connecting rod 1220 is rotated approximately 90 degrees so that the limiting section 1222 lies across the outside of the first connecting hole 1121, thereby preventing the connecting rod 1220 from slipping out of the first connecting hole 1121. At this time, the sliding section 1221 can be slidably received in the first connecting hole 1121, so that the first connecting portion 1200 can be flipped or swung relative to the main body 1100, for example, from Figure 3C The side of the main body 1100 is turned or swung to Figure 3D The main body 1100 is shown at an acute angle, or further flipped or swung to Figure 3EThe first connecting hole 1121 is shown to be substantially on the same arc surface as the main body 1100 to accommodate the bending process of the main body 1100. Preferably, the first connecting hole 1121 includes a large hole 1122 with a larger width and a small hole 1123 with a smaller width. The sliding section 1221 is slidably received in the large hole 1122, and the width of the sliding section 1221 is greater than the width of the small hole 1123. This effectively prevents the connecting rod 1220 from twisting in the first connecting hole 1121 so that the second connecting part 1300 can be aligned with the first connecting part 1200 for connection.

[0070] It is understandable that in other embodiments, the main body 1100 and the first connecting portion 1200 may also be directly and movably connected in other ways, or may also be movably connected through one or more intermediate connecting elements.

[0071] For example, Figure 3F and Figure 3G As shown, the main body 1100b and the first connecting part 1200b are tied and connected via a suture 1400b. Specifically, a second connecting hole 1223 is formed on the connecting rod 1220b of the first connecting part 1200b. The suture 1400b passes through the first connecting hole 1121b of the main body 1100b and the second connecting hole 1223 of the first connecting part 1200b, is wrapped around the hole walls multiple times, and then tied into a knot, thereby movably connecting the main body 1100b and the first connecting part 1200b (the specific threading path and winding method of the suture 1400b are not limited).

[0072] Or, as Figure 3H and Figure 3I As shown, the main body 1100b and the first connecting portion 1200b are connected via a frame-type connecting member 1400c. For example, a metal sheet can be bent and passed through the first connecting hole 1121b of the main body 1100b and the second connecting hole 1223 of the first connecting portion 1200b. The two ends of the metal sheet are then welded together to form the frame-type connecting member 1400c, thereby movably connecting the main body 1100b and the first connecting portion 1200b. The shape of the frame-type connecting member 1400c can be, but is not limited to, rectangular, circular, etc.

[0073] Or, as Figure 3J and Figure 3K As shown, the main body 1100b and the first connecting portion 1200b are connected via a connecting piece 1400d similar to an "8" shape. For example, the two ends of a metal sheet can be bent and inserted through the first connecting hole 1121b of the main body 1100b and the second connecting hole 1223 of the first connecting portion 1200b. Then, pressure is applied to the two ends of the metal sheet to form the connecting piece 1400d, thereby movably connecting the main body 1100b and the first connecting portion 1200b.

[0074] It is understandable that in other embodiments, the main body 1100b and the first connecting portion 1200b may also be connected via an intermediate connecting element by other means such as hinges, rivets, etc., which will not be described in detail here. Figures 3F to 3K In the embodiment, the second connection hole 1223 of the first connection part 1200b is provided on the connecting rod 1220b, but in other embodiments, the second connection hole 1223 may also be provided on other parts of the first connection part 1200b, such as the cylinder 1210, and the connecting rod 1220b is omitted.

[0075] Reference again Figure 3A and Figure 3B In this embodiment, a first coupling portion 1212 is formed at one end of the barrel 1210 near the connecting rod 1220, for detachably connecting to a delivery device (described in detail below) for delivering the loopable medical device 1000. Here, the first coupling portion 1212 includes two diametrically opposed recessed portions 1213 to form a hook-shaped structure. The recessed portions 1213 are, for example, C-shaped, which can be formed, for example, by cutting. The overall shape of the first coupling portion 1212 is "S" or "Z"-shaped. In conjunction with the above paragraph, it can be seen that in other embodiments, the connecting rod 1220b can be omitted, and the second connection hole 1223 of the first connection portion can be provided on the first coupling portion 1212 of the barrel 1210, for example, located on the barrel wall between the two recessed portions 1213. The main body and the first connection portion are then connected via an intermediate connecting element by bundling, crimping, hinged connection, or riveting. This will not be described in detail here.

[0076] In this embodiment, the first connecting portion 1200 further includes at least one spring clip 1230 connected to the cylindrical body 1210. For example, in this embodiment, the first connecting portion 1200 includes three spring clips 1230, which are evenly spaced circumferentially around the central axis of the cylindrical body 1210. Each spring clip 1230 can automatically spring into the cavity 1211 of the cylindrical body 1210 using its own elasticity to cooperate with the second connecting portion 1300 (described in detail below). To ensure that the first connecting portion 1200 has a certain degree of elasticity and strength, the first connecting portion 1200 is preferably made of a metal material, such as stainless steel, nickel-titanium alloy, or cobalt-chromium alloy.

[0077] refer to Figure 4A and Figure 4BIn this embodiment, the second connecting portion 1300 is designed separately from the main body 1100. It can be understood that in other embodiments, the second connecting portion and the main body can also be designed as one piece. In this embodiment, the second connecting portion 1300 includes a locking portion 1310. The locking portion 1310 has an inner cavity that runs through itself in the axial direction to form a third channel 1311 for the guide wire to pass through. The third channel 1311 is connected to the first channel 1114 on the aforementioned main body 1100. Specifically, the locking portion 1310 includes a hollow cylindrical section 1312 and a connecting section 1313 and a guide section 1314 respectively connected to the two ends of the hollow cylindrical section 1312. The connecting section 1313 is used to be fixedly connected to the second end 1102 of the main body 1100, for example, it is connected to an annular section 1112 of the main body 1100 located at the second end 1102 by bonding, crimping or welding. The guide section 1314 is tapered to facilitate the second connecting part 1300 to enter the cavity 1211 of the first connecting part 1200, and the diameter of the end face of the guide section 1314 adjacent to the hollow cylindrical section 1312 is larger than the diameter of the cylindrical section 1312, thereby forming a locking step 1315, wherein the maximum diameter of the locking step 1315 (i.e., the maximum diameter of the cone) is smaller than the diameter of the cavity 1211 of the first connecting part 1200 to allow the locking part 131 to enter the cavity 1211 of the first connecting part 1200.

[0078] refer to Figures 4C to 4D When the locking portion 1310 moves along the arrow direction (from left to right) into the cavity 1211 of the first connecting portion 1200 until the locking step 1315 passes over the three spring pieces 1230 in the axial direction, the three spring pieces 1230, which are not subjected to external forces, automatically spring into the cavity 1211 of the first connecting portion 1200 by their own elasticity and engage with the locking step 1315 (in other words, the circle formed by the free ends of the three spring pieces 1230 ( Figure 3BThe diameter of the locking step 1315 (shown in dashed lines) is smaller than the maximum diameter of the locking step 1315, thereby stably locking the first connecting portion 1200 and the second connecting portion 1300 and preventing the first connecting portion 1200 and the second connecting portion 1300 from being separated from each other. Preferably, to improve the smoothness of the locking portion 1310 entering the cavity 1211 of the first connecting portion 1200, the cylindrical body 1210 is provided with a plurality of receiving grooves 1214 that communicate with the cavity 1211. The receiving grooves 1214 may penetrate the cylindrical wall of the cylindrical body 1210 as shown in the figure, or they may not penetrate through the cylindrical wall. Each spring piece 1230 can be received in a corresponding receiving groove 1214 under the action of external force (which will be described in detail below with reference to the conveying device). Therefore, when the locking portion 1310 enters the cavity 1211 of the first connecting portion 1200 and moves, the locking portion 1310 is free from the obstruction of the spring piece 1230 until the locking step 1315 passes over the spring piece 1230 in the axial direction. Then, the external force applied to the spring piece 1230 is removed, and the spring piece 1230 automatically bounces into the cavity 1211 by its own elasticity and engages with the locking step 1315.

[0079] It is understandable that in other embodiments, the locking portion 1310 is not limited to a locking position in the form of a locking step 1315, but may adopt other forms of locking positions, and the number of locking positions is not limited to one, and even the number of locking portions 1310 is not limited to one.

[0080] For example, reference Figure 4E and Figure 4F As shown, the locking portion 1310a can be a locking position in the form of a locking recess 1315a. Specifically, three locking recesses 1315a are evenly distributed along the circumference of the outer circumferential wall of the hollow cylindrical section 1312 of the locking portion 1310a. Each locking recess 1315a is recessed inward from the outer circumferential wall of the cylindrical section 1312 (but does not penetrate the wall of the cylindrical section 1312). When the locking portion 1310a enters the cavity 1211 of the first connecting portion 1200 until the locking recess 1315a corresponds to the spring clip 1230, the external force applied to the spring clip 1230 is removed, and the spring clip 1230 automatically retracts into the locking recess 1315a due to its own elasticity, thus achieving locking.

[0081] Or, as Figure 4G and Figure 4H As shown, the locking portion 1310b also adopts a locking position in the form of a locking recess 1315b. Figure 4E and Figure 4FUnlike the illustrated example, the locking recess 1315b of this example penetrates the wall of the cylindrical section 1312 and communicates with the third channel 1311 of the locking portion 1310b. When the locking portion 1310b enters the cavity 1211 of the first connecting portion 1200 until the locking recess 1315b corresponds to the spring tab 1230, the external force applied to the spring tab 1230 is removed, and the spring tab 1230 automatically springs back into the locking recess 1315b due to its own elasticity, thus achieving locking.

[0082] Or, as Figure 4I and Figure 4J As shown, the locking portion 1310c can also adopt a locking position in the form of a locking tab 1315c. Figure 4G and Figure 4H The locking portion 1310b shown in the figure, the locking portion 1310c of this example also includes three locking protrusions 1315c. When the locking portion 1310c enters the cavity 1211 of the first connecting portion 1200 until the locking protrusion 1315c passes over the spring piece 1230 in the axial direction, the external force applied to the spring piece 1230 is removed, and the spring piece 1230 automatically bounces into the cavity 1211 by its own elasticity and abuts against the corresponding locking protrusion 1315c, thereby achieving locking.

[0083] Combined with Figure 5A and the aforementioned Figure 1A Preferably, the loopable medical device 1000 of this embodiment further includes a covering film 1500, which covers at least a portion of the main body 1100, the first connecting portion 1200, and the second connecting portion 1300. The covering film 1500 can reduce surface friction of the loopable medical device 1000, reduce damage to cardiac tissue, and improve biocompatibility and promote tissue endothelialization. Preferably, the material of the covering film 1500 is selected from ePTFE, PET, PU, ​​etc. In this embodiment, the covering film 1500 includes a first covering film 1510, which covers the outer surface of the main body 1100, and a second covering film 1520, which covers the outer surface of the first connecting portion 1200. Each of the first covering film 1510 and the second covering film 1520 is in the shape of a tube with two open ends to allow a guidewire to enter the first channel 1114 of the main body 1100 and the second channel 1211 of the first connecting portion 1200. It is understandable that in other embodiments, the covering film 1500 may also cover the outer surfaces of the main body 1100, the first connecting portion 1200 and the second connecting portion 1300. Alternatively, Figure 5BAs shown, in other embodiments, the covering film 1500a may also be an integral piece with openings at both ends, and a lateral opening 1501 is further provided at the connection between the main body 1100 and the first connecting part 1200, so that when the main body 1100 is in a straight structure and the first connecting part 1200 is in a first structure protruding laterally from the main body 1100, the guide wire can enter the first channel 1114 of the main body 1100 and the delivery device can be connected to the first connecting part 1200 via the lateral opening 1501.

[0084] refer to Figures 6A to 6E The ring-forming medical device 2000 of the second embodiment of the present invention is substantially similar to the ring-forming medical device 1000 of the first embodiment, and the similarities are not repeated here. The difference between the two is that the main body 1100, the first connecting part 2200 and the second connecting part 1300 of this embodiment are designed as an integral whole. For example, the main body 1100, the first connecting part 2200 and the second connecting part 1300 can be cut and formed from a circular tube.

[0085] In order to improve the flipping or swinging performance between the main body 1100 and the first connecting part 2200, and at the same time ensure the accessibility of the second channel 2211 of the first connecting part 2200 (the components of the conveying device will enter the second channel 2211 of the first connecting part 2200, which will be described in detail below), preferably, two connecting bars 2400 are connected between the main body 1100 and the first connecting part 2200. One end of the two connecting bars 2400 is connected to the first coupling portion 1212 of the first connecting part 2200 (that is, the first connecting part 2200 omits the connecting rod 1220), and the other end is connected to the first end 1101 of the main body 1100. Figure 6A As shown, when the first connecting portion 2200 is coaxial with the main body 1100 in the straight configuration, each connecting strip 2400 extends in an arc shape, and the bending direction is from the first ridge 1111 of the main body 1100 toward the side of the annular section 1112 away from the first ridge 1111. This can effectively improve the flipping or swinging performance between the main body 1100 and the first connecting portion 2200, ensuring that the first connecting portion 2200 can smoothly switch between the first configuration and the second configuration. Figure 6B As shown, the two connecting strips 2400 are spaced apart from each other to form an elliptical structure. When the first connecting portion 2200 is flipped or swung in the opposite direction of the bending direction of the connecting strip 2400 to the first structure (such as Figure 6C and Figure 6DAs shown), this type of elliptical structure, that is, a through channel 2401 is formed between the two connecting strips 2400 and communicates with the second channel 2211 of the first connecting part 2200, thereby ensuring the accessibility of the second channel 2211 of the first connecting part 2200. Figure 6E When the loopable medical device 2000 of this embodiment is delivered and advanced along the guide wire (whose distal end is bent into a generally circular shape), the main body 1100 is transformed from a straight configuration to a curved configuration, the second connecting portion 1300 is connected to the first connecting portion 2200 facing the second connecting portion 1300 and locked to each other, and the first connecting portion 2200 is also transformed from a straight configuration to a curved configuration. Figure 6C The first structure shown in / 6D (i.e., the first connecting portion 2200 is located on one side of the main body 1100) is transformed into Figure 6E The second configuration shown (ie, the first connecting portion 2200 protrudes axially from the main body 1100 ) forms a closed loop, wherein two connecting strips 2400 extend between the first connecting portion 2200 and the main body 1100 .

[0086] refer to 7A to 7C The ring-forming medical device 3000 of the second embodiment of the present invention is substantially similar to the ring-forming medical device 2000 of the second embodiment, and the similarities are not repeated here. The difference between the two is that the second connecting portion 3300 of this embodiment includes a plurality of locking portions 3310, so that the size of the ring finally formed by the ring-forming medical device 3000 is adjustable.

[0087] Specifically, the first ridge 1111 of the main body 1100 of this embodiment further extends from the second end 1102 in a direction away from the annular section 1112 to form a connecting ridge 3500 for connecting the plurality of locking portions 3310. In this embodiment, the main body 1100, the two connecting strips 2400, the first connecting portion 2200 and the connecting ridge 3500 are integrally formed, for example, by cutting a pipe. Figure 7B As shown, each locking portion 3310 has an inner lumen extending axially through it to form a third channel 3311 for the guidewire to pass through. The third channel 3311 is connected to the first channel 1114 of the main body 1100. Each locking portion 3310 includes a hollow cylindrical section 3312 and a guide section 3314 connected to one end of the hollow cylindrical section 3312. Through holes 3316 are defined in the sidewalls of the hollow cylindrical section 3312 and the guide section 3314 for the connecting ridge 3500 to pass through. The connecting ridge 3500 can be fixedly connected to the wall of the through hole 3316 by bonding, welding, or crimping. It is understood that in other embodiments, the main body 1100, the two connecting strips 2400, the first connecting portion 2200, the connecting ridge 3500, and each locking portion 3310 can also be integrally formed.

[0088] Combined with 7A and Figure 7C When the loopable medical device 3000 of this embodiment is delivered and advanced along the guide wire (whose distal end is bent into a roughly ring-shaped shape), the main body 1100 changes from a straight structure to a curved structure. According to different requirements for the size of the loop, one of the locking parts 3310 of the second connecting part 3300 is selected to connect with the first connecting part 2200 and lock with each other. At the same time, the first connecting part 2200 is also Figure 7A The first configuration shown (ie, the first connection portion 2200 is located on one side of the main body portion 1100) is transformed into Figure 7C The second configuration shown (ie, the first connecting portion 2200 protrudes axially from the main body 1100 ) forms a closed loop. Optionally, the number of the locking portions 3310 of the second connecting portion 3300 may be in the range of 1-50.

[0089] refer to Figure 8A One embodiment of the present invention provides a delivery device 5000 for delivering the loopable medical device 1000 / 2000 / 3000 of any of the aforementioned embodiments. The delivery device 5000 includes an outer tube assembly 5100, a locking tube assembly 5200 that is movably disposed within the outer tube assembly 5100, and a capture assembly 5300 that is movably disposed within the locking tube assembly 5200. The outer tube assembly 5100, the locking tube assembly 5200, and the capture assembly 5300 operate independently of one another.

[0090] Combine Figure 8A 、 Figure 8B and 8C As shown, the outer tube assembly 5100 includes an outer tube 5110 and a first operating handle 5120 connected to the proximal end of the outer tube 5110. The distal end of the outer tube 5110 is provided with a second coupling portion 5111 for detachably coupling with the first coupling portion 1212 of the first connecting portion 1200 / 2200. In correspondence with the hook-shaped structure of the first coupling portion 1212, the second coupling portion 5111 utilizes a hook-shaped structure that complements the shape of the first coupling portion 1212, thereby mating with the first coupling portion 1212. Preferably, a bulge 5112 is provided on the outer side of the tube wall of the outer tube 5110 near its distal end, and a guide hole 5113 is provided in the bulge 5112 which penetrates the bulge 5112 axially. The guide hole 5113 is offset outward relative to the inner cavity of the outer tube 5110. The guide hole 5113 is used for passing a guide wire and being guided by the guide wire, and the guide hole 5113 and the first channel 1114 of the main body 1100 and the third channel 1311 / 3311 of the second connecting part 1300 / 3300 can all be passed through by a guide wire.

[0091] Combine Figure 8A and 8DAs shown, the locking tube assembly 5200 includes a locking tube 5210 and a second operating handle 5220 connected to the proximal end of the locking tube 5210. The locking tube 5210 passes through the outer tube 5110 and the first operating handle 5120 of the outer tube assembly 5100 and is movably received within the outer tube 5110 and the first operating handle 5120. The locking tube 5210 has a locking section 5211 at its distal end, which is used to enter the cavity 1211 of the first connecting portion 1200 and push the spring 1230 outward into the receiving groove 1214 (details will be described below).

[0092] Combine Figure 8A 、 8E As shown in Figures 8F and 8F , the capture assembly 5300 includes a capture catheter 5310, a third operating handle 5320 connected to the proximal end of the capture catheter 5310, a capture rod 5330 movably disposed within the capture catheter 5310 and the third catheter operating handle 5320, and a capture device 5340 and a fourth operating handle 5350 respectively connected to the distal and proximal ends of the capture rod 5330. The capture catheter 5310 movably passes through the locking tube 5210 and the second operating handle 5220 of the locking tube assembly 5200. In this embodiment, the capture device 5340 includes a plurality of capture rings 5341, each of which has a converging proximal end and is connected to the distal end of the capture rod 5330 via a connector 5342. In practice, the operator can hold the third operating handle 5320 with one hand and push the fourth operating handle 5350 with the other hand to expose the catcher 5340 to the distal end of the catch catheter 5310, and each catch ring 5341 will self-expand (e.g., Figure 8E Alternatively, the operator can hold the third operating handle 5320 with one hand and pull the fourth operating handle 5350 with the other hand to retract the capture device 5340 into the capture catheter 5310 (as shown); Figure 8F shown).

[0093] refer to Figure 8G and Figure 8HA medical system 6000 according to an embodiment of the present invention includes a loopable medical device 1000 and a delivery device 5000 . During assembly, the second coupling portion 5111 of the outer tube 5110 and the first coupling portion 1212 of the first connecting portion 1200 can be hooked together, and then the second operating handle 5220 is operated to move the locking section 5211 at the distal end of the locking tube 5210 distally into the cavity 1211 of the first connecting portion 1200, and push the spring piece 1230 outward into the receiving groove 1214, so as to ensure that the capture catheter 5310 can move freely in the cavity 1211 of the first connecting portion 1200, and also facilitate the subsequent locking portion 1310 to enter the cavity 1211 of the first connecting portion 1200; at the same time, the portion of the locking tube 5210 located on the proximal side of the locking section 5211 contacts the inner walls of the second coupling portion 5111 and the first coupling portion 1212 that are hooked together, so that the second coupling portion 5111 and the first coupling portion 1212 cannot be separated from each other, thereby locking and connecting the loopable medical device 1000 and the delivery device 5000. It is understandable that in other embodiments, the medical system 6000 may also include other embodiments of loopable medical devices, such as the loopable medical device 2000 / 3000 and the delivery device 5000, which will not be described in detail here.

[0094] refer to 9A to 9D When the loopable medical device 1000 is implanted, a conventional guidewire insertion operation is first performed, the distal end of the guidewire 1 is wrapped around the heart tissue 2, and the proximal end of the guidewire 1 remains outside the body (e.g., Figure 9A 1300 ); and then assemble the delivery device 5000 and the loopable medical device 1000 together by the method described above (at this time, the main body 1100 of the loopable medical device 1000 is in a straight structure, and the first connecting portion 1200 is in the first structure), and the proximal end of the guide wire 1 left outside the body is sequentially inserted into the third channel 1311 of the second connecting portion 1300 of the loopable medical device 1000, the first channel 1114 of the main body 1100, and the guide hole 5113 of the outer tube 5110; next, the loopable medical device 1000 and the delivery device 5000 are pushed into the body as a whole along the guide wire 1; when the distal end of the delivery device 5000 is close to the distal end of the guide wire 1, the distal end of the capture assembly 5300 is operated to pass through the first connecting portion 1200, and the capture device 5340 captures the distal end of the guide wire 1 (as shown in FIG. Figure 9BAs shown), the catcher 5340 is then withdrawn to drive the distal end of the guide wire 1 into the cavity of the first connecting part 1200. At the same time or later, the outer tube assembly 5100 and the locking tube assembly 5200 of the delivery device 5000 are continued to be pushed along the guide wire 1 to push the ring-forming medical device 1000, so that the ring-forming medical device 1000 surrounds the entire heart tissue 2 along the guide wire 1, and under the guidance of the guide wire 1, the second connecting part 1300 enters the first connecting part 1200 and the locking step 1315 axially passes over the spring piece 1230; then the locking tube assembly 5200 is operated to withdraw the locking section 5211, and the spring piece 1230 is no longer resisted by the locking section 5211 and automatically bounces inward into the cavity 1211 of the first connecting part 1200 and abuts against the locking step 1315, thereby achieving the locking of the first connecting part 1200 and the second connecting part 1300 (as shown). Figure 9C Next, the outer tube assembly 5100 is operated to withdraw the outer tube 5110 to disengage the second coupling portion 5111 from the first coupling portion 1212, thereby unlocking and separating the looped medical device 1000 from the delivery device 5000; and then the capture assembly 5300 is operated to cause the capturer 5340 to release the distal end of the guide wire 1 (as shown). Figure 9D Finally, the guidewire 1 and delivery device 5000 are withdrawn from the body, leaving the looped medical device 1000 inside the body. It is understood that in other embodiments, the same surgical method can also be used to implant other loopable medical devices, such as the loopable medical devices 2000 / 3000, into the body, and no further details will be given here.

[0095] refer to Figures 10A to 10C As shown, the ring-forming medical device 1000 / 2000 / 3000 of the embodiment of the present invention can be applied to three different cardiac surgeries. Figure 10A As shown, the ringable medical device 1000 / 2000 / 3000 is used for valve replacement. Specifically, the medical device 1000 / 2000 / 3000 can be implanted via the femoral artery-aortic arch-aortic valve orifice-left ventricle route, forming a ring around the leaflets of the mitral valve and / or the adjacent leaflets of the chordae tendineae. The artificial heart valve 3 is then released into the ringed medical device 1000 / 2000 / 3000, thereby anchoring and limiting the artificial heart valve 3 with the ringed medical device 1000 / 2000 / 3000.

[0096] Or as Figure 10BAs shown, the loopable medical device 1000 / 2000 / 3000 is used for chordae tendineae manipulation. Specifically, the medical device 1000 / 2000 / 3000 can be implanted via the femoral artery-aortic arch-aortic valve orifice-left ventricle, forming a loop around the middle portion of the chordae tendineae of the mitral valve. By controlling the diameter of the looped medical device 1000 / 2000 / 3000, the tightness of the chordae tendineae can be regulated, thereby treating conditions such as mitral regurgitation caused by excessive chordae tendineae.

[0097] Or as Figure 10C As shown, the loopable medical device 1000 / 2000 / 3000 is used for papillary muscle tightening and modulation. Specifically, the medical device 1000 / 2000 / 3000 can be implanted via the femoral artery, aortic arch, aortic valve orifice, and left ventricle, forming a loop around the outer sides of multiple papillary muscles of the mitral valve. This tightens the muscles closer together, reduces the size of the left ventricle, and treats symptoms such as heart failure.

[0098] It can be understood that for mitral valve replacement or repair, the interventional pathway may also be, but is not limited to, via the femoral vein-inferior vena cava-right atrium-left atrium-left ventricle; and each embodiment may also perform tricuspid valve replacement or repair by selecting a suitable interventional pathway.

[0099] The above description is only a preferred specific embodiment of the present invention. The scope of protection of the present invention is not limited to the embodiments listed above. Any simple changes or equivalent replacements of the technical solutions that can be obviously obtained by any technician familiar with this technical field within the technical scope disclosed in the present invention fall within the scope of protection of the present invention.

Claims

1. A ring-forming medical device, characterized in that: The invention comprises a main body, a first connecting part and a second connecting part, wherein the main body is configured to be able to transform from a straight structure to a curved structure and comprises a first end and a second end arranged opposite to each other in the axial direction, the first connecting part is connected to the first end of the main body, and the second connecting part is connected to the second end of the main body, wherein the first connecting part has a first structure that protrudes laterally from the first end of the main body and faces the second connecting part, and when the main body transforms from the straight structure to the curved structure, the second connecting part can be connected to the first connecting part facing the second connecting part and locked to each other, so that the first connecting part, the second connecting part and the main body in the curved structure form a ring together; the first connecting part and the first end of the main body can move relative to each other, and the first connecting part also has a second structure that protrudes axially from the first end of the main body, wherein when the main body transforms from the straight structure to the curved structure, the first connecting part transforms from the first structure to the second structure; the main body, the first connecting part and the second connecting part are all configured to allow a guide wire to pass through.

2. The loopable medical device according to claim 1, wherein: The axis of the first connecting portion in the first structure is parallel to the axis of the main body in the straight structure, or the acute angle between the two axes is no more than 30° and there is a lateral interval between them. The axis of the first connecting portion in the second structure coincides with the axis of the main body in the curved structure.

3. The loopable medical device according to claim 1, wherein: The loopable medical device is configured to be advanced along the guidewire having a distal end curved into a loop, wherein during the advancement, the main body portion transitions from the straight configuration to the curved configuration and the physical length between the first end and the second end of the main body portion remains unchanged.

4. The loopable medical device according to claim 3, wherein: The main body portion includes a strip structure and / or a tubular structure, wherein the tubular structure includes a plurality of cutting grooves.

5. The loopable medical device according to claim 3, wherein: The material of the main body is selected from one or more of the following groups: nickel-titanium alloy, stainless steel, cobalt-chromium alloy, polytetrafluoroethylene, polyetheretherketone, polyethylene and nylon.

6. The loopable medical device according to claim 1, wherein: The first connecting part includes a cylinder and at least one elastic piece, the cylinder has a cavity running through it, the at least one elastic piece is connected to the cylinder and can be ejected into the cavity of the cylinder, the second connecting part includes at least one locking part, at least one of the locking parts can be received in the cavity of the cylinder and engage with the at least one elastic piece, thereby locking the first connecting part and the second connecting part.

7. The loopable medical device according to claim 6, wherein: The cylinder of the first connecting part is provided with a receiving groove connected to the cavity of the cylinder. The spring piece can be received in the receiving groove under the action of external force, and when the external force disappears, the spring piece can automatically rebound into the cavity to engage with the locking part.

8. The loopable medical device according to claim 6, wherein: The locking portion includes at least one locking location, and the at least one locking location is selected from one or more of the following groups: a locking step, a locking recess, and a locking tab.

9. The loopable medical device according to claim 6, wherein: The second connecting portion includes two or more locking portions so that the size of the loop formed by the loopable medical device is adjustable.

10. The loopable medical device according to claim 1, wherein: The first connecting portion is designed separately from the main body portion, and the first connecting portion is movably connected to the first end of the main body portion directly or via one or more intermediate connecting elements.

11. The loopable medical device according to claim 1, wherein: The first connecting portion is designed as an integral unit with the main body, and two connecting strips spaced apart from each other are connected between the first end of the main body and the first connecting portion. When the first connecting portion is in the first structure, a through channel connected to the first connecting portion is formed between the two connecting strips.

12. The loopable medical device according to claim 1, wherein: The first connecting portion is provided with a first coupling portion, and the first coupling portion is detachably connected to a conveying device for conveying the loopable medical device.

13. The loopable medical device according to claim 1, wherein: The second connecting portion and the main body are designed separately or integrally.

14. The loopable medical device according to claim 1, wherein: The loopable medical device further includes a covering film covering at least a portion of the main body, the first connecting portion, and the second connecting portion.

15. A medical system, characterized in that: It comprises a loopable medical device and a delivery device according to any one of claims 1 to 14, wherein the delivery device comprises an outer tube and a capture assembly movably arranged in the inner cavity of the outer tube for capturing a guide wire, and the distal end of the outer tube is provided with a second coupling portion for detachably connecting to the first connecting portion of the loopable medical device.

16. The medical system according to claim 15, characterized in that The second connecting portion adopts a hook-shaped structure, and the first connecting portion is provided with another hook-shaped structure that cooperates with the hook-shaped structure; the medical system also includes a locking tube that is movably inserted into the inner cavity of the outer tube and movably sleeved outside the capture component, and the locking tube is configured to press against the inner walls of the hook-shaped structure and the other hook-shaped structure that cooperate with each other to lock the loopable medical device and the conveying device.

17. The medical system according to claim 15, wherein: A guide hole is provided on the wall of the outer tube. The main body and the second connecting portion of the ring-forming medical device jointly form a guidewire channel. The guide hole and the guidewire channel are used for the guidewire to pass through.

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