Puncture device and tissue suturing system

Abstract

The invention provides a puncture device and a tissue suture system.The puncture device comprises a connecting catheter located at the near end, a control part arranged in the connecting catheter in a penetrating mode and a puncture suture system, and the puncture suture system comprises a puncture needle, a hollow pipe detachably connected with the puncture needle and a suture line located in the hollow pipe; the suture line is fixedly connected with the puncture needle, the control part comprises a capturing device, and after the puncture needle punctures a biological tissue, the capturing device is connected with the puncture needle in a buckled mode so as to complete suture of the biological tissue. The puncture and suture system is arranged in the catheter, the overall structure of the device is simplified, the puncture needle is fixedly connected with the suture line and connected with the capturing device in a buckled mode, the whole device is stable and reliable, and the operation success rate is increased.

Description

Technical Field

[0002] This invention relates to the field of medical device technology, and to a device for repairing heart valve defects, specifically to a puncture device and a tissue suturing system. Background Technology

[0004] Mitral regurgitation is one of the most common valvular heart diseases today. The main causes include rheumatic heart disease, mitral valve myxoid degeneration, ischemic heart disease, and cardiomyopathy, leading to lesions in the mitral valve structure, including the annulus, leaflets, chordae tendineae, and papillary muscles, resulting in the inability of the mitral valve leaflets to close completely. Surgical treatment is an effective method for mitral regurgitation; however, due to the significant trauma, complications and mortality rates are higher in elderly patients and those with multiple comorbidities. Therefore, minimally invasive interventional surgery is now a better choice for most heart diseases. The main interventional treatments include artificial chordae tendineae implantation, mitral valve annulus repair, and mitral valve edge-to-edge repair. Among these, implanting artificial chordae tendineae on the leaflets can effectively treat mitral regurgitation caused by chordae tendineae rupture or leaflet prolapse while maintaining the physiological integrity of the mitral valve structure.

[0005] Existing puncture devices have some problems in the process of puncturing human tissue and suturing tissue: For example, in the prior art, publication number CN103889345A discloses a suturing device and method for suturing anatomical flaps. Specifically, it discloses a suturing device for suturing anatomical flaps without requiring cardiac arrest. This suturing device uses a set of barbed puncture needles extending from a sheath. After the puncture needles pass through the anatomical flap, the barbs on the puncture needles engage with sutures pre-set on the buckle arm. Retracting the puncture needles pulls the sutures pre-set on the buckle arm back, completing the suturing of the anatomical flap. However, the sutures of this suturing device are exposed outside the instrument, making the peripheral shape of the suturing device irregular. Axial pushing and circumferential rotation of the instrument increase the risk of damaging biological tissue. Furthermore, the sutures exposed outside the instrument may become entangled and knotted during axial pushing and circumferential rotation, damaging the sutures and thus reducing the success rate of the surgery and increasing the risks during the operation. Summary of the Invention

[0007] This invention primarily provides a puncture device and tissue suturing system. The technical problem it aims to solve is that, addressing the shortcomings of existing technologies, the puncture sutures are exposed outside the instrument, resulting in an irregular outer shape of the device. This increases the risk of tissue damage during axial pushing and circumferential rotation of the instrument. Furthermore, the exposed sutures are prone to tangling and knotting during these movements, leading to suture damage. Additionally, the delivery catheter requires a separate channel to accommodate the sutures, complicating its structure and increasing production and surgical costs. In existing technologies, the connection between the puncture needle barb and the suture is a movable connection; during needle retraction, the sutures are easily dislodged by blood flow, increasing surgical time, surgical risks, and reducing the success rate.

[0008] To solve the above-mentioned technical problems, the present invention provides a puncture device and a tissue suturing system, including a connecting catheter located at the proximal end, a control part and a puncture suturing system disposed within the connecting catheter, characterized in that: the puncture suturing system includes a puncture needle, a hollow tube detachably connected to the puncture needle, and a suture located within the hollow tube, the suture being fixedly connected to the puncture needle; the control part includes a trapping device, which engages with the puncture needle after the puncture needle punctures biological tissue to complete the suturing of the biological tissue.

[0009] In one specific embodiment, the proximal end of the puncture needle has an external thread structure, and the distal end of the hollow tube has an internal thread structure. The hollow tube is threadedly connected to the puncture needle through the thread structure.

[0010] In one specific embodiment, the proximal end of the puncture needle further includes an inner hole for housing a suture and being fixedly connected to the suture.

[0011] In one specific embodiment, the hollow tube includes a hollow tube channel for housing a suture and for gap-fitting the suture.

[0012] In one specific embodiment, the puncture needle further includes a retaining groove. After the puncture needle punctures the biological tissue, the capture device is connected to the puncture needle via the retaining groove to complete the suturing of the biological tissue.

[0013] In one specific embodiment, the trapping device is made of shape memory metal.

[0014] In one embodiment, the capture device includes a central hole, the diameter of which is adapted to the outer diameter of the puncture needle so that the puncture needle can pass through the central hole.

[0015] In one specific embodiment, the central hole has a boss structure that is interference-fitted with the outer diameter of the puncture needle and adapted to the groove of the puncture needle. When the puncture needle punctures biological tissue, the groove of the puncture needle is snapped into place with the boss structure of the capture device.

[0016] In one specific embodiment, the outer diameter of the hollow tube is the same as the outer diameter of the puncture needle, so that the circumferential surface of the hollow tube and the puncture needle are smoothly connected.

[0017] In one specific embodiment, the puncture needle includes a puncture needle tip, which is a conical structure with a cone angle of 20° to 70°.

[0018] The beneficial effects of the present invention are as follows: Unlike existing technologies, the embodiments of the present invention provide a puncture device and tissue suturing system, including a connecting catheter located at the proximal end, a control unit and a puncture suturing system disposed within the connecting catheter, characterized in that: the puncture suturing system includes a puncture needle, a hollow tube detachably connected to the puncture needle, and a suture thread located within the hollow tube, the suture thread being fixedly connected to the puncture needle; the control unit includes a trapping device, which engages with the puncture needle after the puncture needle punctures biological tissue to complete the suturing of the biological tissue.

[0019] By incorporating the aforementioned puncture device and tissue suturing system, the sutures are placed inside the catheter, preventing them from being exposed outside the instrument and thus maintaining its overall size. This reduces the number of wounds during surgery, minimizing patient discomfort and promoting faster recovery. The sutures are housed within a hollow tube, which supports and protects them, preventing tangling and knotting during axial movement and circumferential rotation of the instrument. The shared channel between the sutures and the puncture suturing system reduces the number of catheter channels, decreasing manufacturing complexity and production costs, and resulting in a more compact catheter structure, facilitating minimally invasive procedures. Connection methods such as fixed connections between the sutures and the puncture needle, interference fits between the sutures and the hollow tube, threaded connections between the hollow tube and the puncture needle, and snap-fit ​​connections between the puncture needle and the capture device provide greater stability and reliability, preventing the risk of sutures and capture devices detaching during surgery, reducing the success rate, and shortening surgical time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is an overall schematic diagram of a puncture device and tissue suturing system according to the present invention; Figure 2 This is an exploded schematic diagram of the components of a puncture device and tissue suturing system according to the present invention; Figure 3 This is a schematic diagram of the closed state of the control unit of a puncture device and tissue suturing system according to the present invention; Figure 4 This is a schematic diagram of the control unit of the puncture device and tissue suturing system of the present invention in the open state; Figure 5 This is a schematic diagram of the drive catheter structure of a puncture device and tissue suturing system according to the present invention; Figure 6 This is a schematic diagram of the assembly of the various components of the telescopic arm of the puncture device and tissue suturing system of the present invention. Figure 7 This is an exploded view of the components of the telescopic arm of the puncture device and tissue suturing system of the present invention. Figure 8 This is a schematic diagram of the second hinge structure of a puncture device and tissue suturing system according to the present invention; Figure 9 This is a schematic diagram of the capture device structure of a puncture device and tissue suturing system according to the present invention; Figure 10 This is a schematic diagram of the limiting component structure of a puncture device and tissue suturing system according to the present invention; Figure 11 This is a schematic diagram of the connecting catheter structure of a puncture device and tissue suturing system according to the present invention; Figure 12 This is a schematic diagram of the internal assembly structure of the connecting catheter of a puncture device and tissue suturing system according to the present invention. Figure 13 This is a schematic diagram of the assembly structure of the connecting catheter and control part of a puncture device and tissue suturing system according to the present invention; Figure 14 This is a schematic diagram of the puncture and suturing system structure of a puncture device and tissue suturing system according to the present invention; Figure 15 This is a schematic diagram of the puncture needle structure of a puncture device and tissue suturing system according to the present invention; Figure 16This is a schematic diagram of the internal assembly structure of the puncture and suturing system of the puncture device and tissue suturing system of the present invention; Figure 17 This is a schematic diagram of the hollow tube structure of a puncture device and tissue suturing system according to the present invention. Figure 18 This is a schematic diagram of the capture device structure of a puncture device and tissue suturing system according to the present invention; Figure 19 This is a schematic diagram of the connection between the puncture needle and the capture device in a puncture device and tissue suturing system according to the present invention. Figure 20 This is a schematic diagram of the suturing state of a puncture device and tissue suturing system according to the present invention; Reference numerals: 100, Control unit; 110, Telescopic arm body; 111, Movable connector; 112, First hinge; 113, Second hinge; 1131, First positioning pin; 114, Capture device; 1141, First positioning hole; 1142, Center hole; 1143, Boss structure; 115, Limiting member; 1151, Second positioning hole; 116, Fixed connector; 117A, First hinge pin; 117B, Second hinge pin; 117C... Third hinge pin; 120, drive conduit; 121, drive conduit channel; 200, connecting conduit; 210, first connecting conduit channel; 211, corner; 220, second connecting conduit channel; 300, puncture suturing system; 320, suture; 342, hollow tube; 343, internal thread; 344, hollow tube channel; 360, puncture needle; 361, puncture needle tip; 362, slot; 363, external thread; 364, inner hole; 400, housing assembly. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0024] A component is referred to as being "fixed to" or "set on" another component, and it may be located directly or indirectly on that other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to that other component.

[0025] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement between components in a specific orientation. If the specific orientation changes, the directional indication will change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. A process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0026] The terms "axial" and "radial" refer to the length of the entire device or component as "axial" and the direction perpendicular to the axial direction as "radial".

[0027] The term "circumferential" refers to the direction along the circumference of a circle.

[0028] "Far end" and "near end" are based on the operator; the position relatively closer to the operator is considered near, and the position farther away from the operator is considered far.

[0029] The terms used above are for ease of description only and should not be construed as limitations on this technical solution.

[0030] In this document, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation may be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a separate or alternative implementation mutually exclusive with other implementations. It will be explicitly and implicitly understood by those skilled in the art that the implementations described herein can be combined with other implementations.

[0031] Please see Figure 1-2 , Figure 1 This is a schematic diagram of the overall structure of the puncture device and tissue suturing system of the present invention. Figure 2 The diagram shows the exploded view of the components of the puncture device and tissue suturing system, including a connecting conduit 200 located at the proximal end of the puncture device and tissue suturing system, a control unit 100 and a puncture suturing system 300 inserted within the connecting conduit 200, and a housing assembly 400 located at the proximal end.

[0032] Furthermore, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the overall structure of the control unit 100. The control unit 100 is a retractable structure with open and closed states, as shown below. Figure 3 This is a schematic diagram of the control unit 100 in the closed state. Figure 4 A schematic diagram of the control unit 100 in its open state. The control unit 100 includes a telescopic arm body 110 located at its distal end, and a drive conduit 120 connected to the telescopic arm body 110, the drive conduit 120 being internally disposed within the telescopic arm body 110. The distal end of the drive conduit 120 is fixedly connected to the telescopic arm body 110, and the fixed connection method is not limited to welding, crimping, or bonding. The proximal end of the drive conduit 120 is clearance-fitted with the telescopic arm body 110. By axially pushing the drive conduit 120, the telescopic arm body 110 can be opened and closed. Pushing the drive conduit 120 along the distal direction opens the telescopic arm body 110 to both sides, putting the control unit 100 in the open state. Retracting the drive conduit 120 along the proximal direction closes the telescopic arm body 110 towards the center, putting the control unit 100 in the closed state.

[0033] Furthermore, such as Figure 5 As shown, the driving catheter 120 is made of a hollow metal material, such as stainless steel or aluminum alloy. The driving catheter 120 has a hollow driving catheter channel 121 with a diameter of 0.6mm to 1.1mm, used for the passage of a guidewire during surgery. The proximal end of the driving catheter 120 is located within the lumen of the connecting catheter 200, and the two are in a clearance fit.

[0034] Furthermore, such as Figure 6-7 As shown, Figure 6 A schematic diagram of the assembly of each component of the telescopic arm body 110. Figure 7This is an exploded view of the components of the telescopic arm body 110. The telescopic arm body 110 includes a movable connector 111 located at the distal end, a first hinge 112 hinged to the movable connector 111, a second hinge 113 hinged to the first hinge 112, a capture device 114 and a limiting member 115 connected to the second hinge 113, and a proximal fixed connector 116 located below the second hinge 113. The movable connector 111 is hinged to the second hinge 112 via a first hinge pin 117A, the first hinge 112 is hinged to the second hinge 113 via a second hinge pin 117B, and the second hinge 113 is connected to the proximal fixed connector 116 via a third hinge pin 117C. The distal end of the drive conduit 120 is fixedly connected to the movable connector 111 at the distal end of the telescopic arm body 110, and the proximal end of the drive conduit 120 is clearance-fitted to the fixed connector 116 at the proximal end of the telescopic arm body 110. When the telescopic arm body 110 is fully closed, the angle between the second hinge 113 and the central axis of the telescopic arm body 110 is 0°~5°; when the telescopic arm body 110 is fully open, the angle between the second hinge 113 and the central axis of the telescopic arm body 110 is 70°~90°.

[0035] Furthermore, such as Figure 6-10 As shown, the capturing device 114 is disposed between the second hinge 113 and the limiting member 115. The second hinge 113 is provided with two first positioning posts 1131, and the capturing device 114 is provided with two first positioning holes 1141 that are coaxially engaged with the first positioning posts 1131. The capturing device 114 is embedded in the slot of the second hinge 113 and, through the first positioning holes 1141 and the first positioning posts 1131, coaxially engages with them, restricting the movement of the capturing device in the forward, backward, left, and right directions. The limiting member 115 is provided with two second positioning holes 1151, which are coaxially connected to two first positioning posts 1131. The limiting member 115 is embedded in the slot of the second hinge 113. The capturing device 114 is clamped between the second hinge 113 and the limiting member 115, and the surfaces are in contact. By welding and physically stamping the two first positioning posts 1131, the connection between the second hinge 113, the capturing device 114, and the limiting member 115 is a fixed connection.

[0036] Furthermore, such as Figure 11-12As shown, the connecting catheter 200 has a first connecting catheter channel 210 through which at least one puncture suturing system 300 passes, and a second connecting catheter channel 220 through which one drive catheter 120 of the control unit 100 passes. The main body of the puncture suturing system 300 and the suture are both inserted into the first connecting catheter channel 210. The connecting catheter 200 does not need to have a separate channel for accommodating the suture, making the structure of the connecting catheter 200 simpler, reducing the number of delivery catheter channels, reducing production costs, reducing the processing difficulty and production cost of the delivery catheter, and making the delivery catheter structure more compact, which is conducive to minimally invasive surgery; and the suture is not exposed outside the instrument, so it does not affect the external size of the instrument, making the overall size of the instrument smaller, which can reduce the wound of the patient during the operation, which is conducive to reducing patient pain and postoperative recovery; the suture is disposed inside the connecting catheter 200, which can support and protect the suture, preventing the suture from getting tangled or knotted during the axial push and circumferential rotation of the instrument.

[0037] Furthermore, the suture is located inside the connecting catheter 200, and the distal end of the first connecting catheter channel 210 is provided with a corner 211 to ensure that the puncture suturing system 300 obtains a sufficient puncture point distance on the biological tissue flap. The angle between the corner 211 and the central axis of the connecting catheter 200 is 10°~20°.

[0038] Furthermore, such as Figure 13 As shown, the distal end of the connecting conduit 200 is fixedly connected to the distal end of the fixed connector 116. The connection method includes, but is not limited to, welding, bonding, or integral processing. The driving conduit 120 is disposed inside the connecting conduit 200 and is clearance-fitted with the connecting conduit 200.

[0039] Furthermore, such as Figures 14-16 As shown, the puncture and suturing system 300 comprises at least one set of puncture needles 360, a hollow tube 342, and sutures 320, as... Figure 14 As shown.

[0040] Furthermore, such as Figure 15As shown, the puncture needle 360 ​​includes a puncture needle tip 361, a groove 362, an external thread 363, and an inner hole 364. The puncture needle 360 ​​is made of stainless steel, such as SUS316 or SUS304. The puncture needle tip 361 has a tapered structure with a certain taper. Utilizing the tapered end face of the tapered structure, it can easily puncture biological tissue and the capture device 114, thereby cooperating with the capture device 114. The cone angle of the conical structure is 20°~70°. The groove 362 is located near the proximal end of the puncture needle tip 361, and the external thread 363 is located near the proximal end of the puncture needle 360 ​​for threaded connection with the hollow tube 342. The puncture needle 360 ​​has an inner hole 364 for pre-setting the suture 320. The suture 320 is preferably a biocompatible polymer material, such as PP, PA, PET, etc., or it can be an absorbable or biodegradable polymer material. The outer diameter of the suture 320 is preferably 0.2mm~0.5mm. The distal end of the suture 320 is disposed in the inner hole 364 and is fixedly connected to the puncture needle 360 ​​by means of crimping, bonding, etc.

[0041] Furthermore, such as Figure 17 As shown, the hollow tube 342 is a hollow tubular structure. The inner diameter of the hollow tube 342 is larger than the outer diameter of the suture 320. The hollow tube 342 is preferably made of stainless steel, including SUS304 and SUS316. The hollow tube 342 includes a hollow tube channel 344 and an internal thread 343. The hollow tube channel 344 is used to house the suture 320 and is clearance-fitted with the suture 320. The internal thread 343 is located on the distal end face of the hollow tube 342 and mates with the external thread 363 of the puncture needle 360, so that the puncture needle 360 ​​is threadedly connected to the hollow tube 342. The outer diameter of the hollow tube 342 is adapted to the outer diameter of the puncture needle 360 ​​to ensure a smooth transition in the shape of the puncture and suturing system.

[0042] Furthermore, such as Figure 18 As shown, the capture device 114 is made of a shape-memory metal alloy, such as stainless steel or nickel-titanium alloy. The capture device 114 also includes a central hole 1142, within which a boss structure 1143 is formed. The boss structure 1143 is a protrusion of the capture device 114 protruding inward along the central hole 1142. The central hole 1142 is adapted to the outer diameter of the puncture needle 360, and the boss 1143 is interference-fitted to the outer diameter of the puncture needle 360 ​​and adapted to the slot 362. The number of bosses 1143 is the same as the number of slots 362.

[0043] Furthermore, such as Figures 19-20As shown, when biological tissue needs to be sutured, the puncture suture system 300 is pushed axially. After the puncture needle 360 ​​passes through the biological tissue, it contacts the capture device 114. The puncture needle 360 ​​deforms the boss 1143 by squeezing it, and then returns to its original shape at the puncture needle 360 ​​slot 362, engaging with the slot 362 to restrict the axial movement and rotation of the boss 1143 relative to the slot 362. By circumferentially rotating the hollow tube 342, the external thread 363 disengages from the internal thread 343, allowing the hollow tube 342 to be withdrawn. The puncture needle 360 ​​and the suture 320 remain on the capture device 114, completing the biological tissue suture. The capture device 114 for the puncture needle 360 ​​is connected to the puncture needle 360 ​​via a snap-fit ​​connection between the protrusion 1143 of the capture device 114 and the slot 362 of the puncture needle 360. This connection method is more stable and reliable, preventing the risk of sutures falling off the capture device due to blood flow during surgery, thus improving the success rate and operation time. The puncture needle 360 ​​and the hollow tube 342 are connected by threads, eliminating the need to apply circumferential traction force to the suture 320 through the hollow tube 342. This also reduces the step of releasing suture traction force during surgery, reducing the risk of suture damage due to axial pulling, simplifying the overall structure of the instrument, making the mechanism easier to operate, and reducing production and surgical costs.

[0044] Unlike existing technologies, the present invention provides a puncture device and tissue suturing system comprising: a connecting catheter located at the proximal end, a control unit and a puncture suturing system disposed within the connecting catheter, characterized in that: the puncture suturing system includes a puncture needle, a hollow tube detachably connected to the puncture needle, and a suture located within the hollow tube, the suture being fixedly connected to the puncture needle; the control unit includes a trapping device, which engages with the puncture needle after the puncture needle punctures biological tissue to complete the suturing of the biological tissue.

[0045] With the aforementioned puncture device and tissue suturing system, by placing the puncture suturing system inside the catheter and ensuring the sutures are not exposed outside the instrument, the overall size of the instrument is reduced without affecting its external dimensions. This reduces the number of wounds for the patient during surgery, thus minimizing patient pain and promoting postoperative recovery. The sutures are housed within a hollow tube, which supports and protects them, preventing tangling and knotting during axial pushing and circumferential rotation of the instrument. The sutures and the puncture suturing system share a single channel, reducing the number of delivery catheter channels, simplifying manufacturing and reducing production costs. This also results in a more compact delivery catheter structure, facilitating minimally invasive surgery. Various connection methods, such as fixed connections between the sutures and the puncture needle, interference fits between the sutures and the hollow tube, threaded connections between the hollow tube and the puncture needle, and snap-fit ​​connections between the puncture needle and the capture device, provide greater stability and reliability. These methods prevent the risk of sutures and capture devices detaching during surgery, reducing the success rate and shortening the operation time.

[0046] The above description is only a partial embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent device or equivalent process transformation made based on the content of the present invention specification and drawings, or direct or indirect application in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A puncture device and tissue suturing system, comprising a connecting catheter (200) located at the proximal end, a control unit (100) and a puncture suturing system (300) disposed within the connecting catheter (200), characterized in that: The puncture and suturing system (300) includes a puncture needle (360), a hollow tube (342) detachably connected to the puncture needle (360), and a suture (320) located inside the hollow tube (342). The suture (320) is fixedly connected to the puncture needle (360). The control unit (100) includes a capture device (114). When the puncture needle (360) punctures biological tissue, the capture device (114) is snapped into contact with the puncture needle (360) to complete the suturing of the biological tissue.

2. The puncture device and tissue suturing system according to claim 1, characterized in that, The puncture needle (360) has an external thread (363) structure at its proximal end, and the hollow tube (342) has an internal thread (343) structure at its distal end. The hollow tube (342) is threadedly connected to the puncture needle (360) through the thread structure.

3. The puncture device and tissue suturing system according to claim 2, characterized in that, The proximal end of the puncture needle (360) also includes an inner hole (364), which is used to house a suture (320) and is fixedly connected to the suture (320).

4. The puncture device and tissue suturing system according to claim 3, characterized in that, The hollow tube (342) includes a hollow tube channel (344), which is used to house a suture (320) and is in clearance fit with the suture (320).

5. The puncture device and tissue suturing system according to claim 4, characterized in that, The puncture needle (360) also includes a slot (362). When the puncture needle (360) punctures biological tissue, the capture device (114) is connected to the puncture needle (360) through the slot (362) to complete the suturing of biological tissue.

6. A puncture device and tissue suturing system according to any one of claims 1 to 5, characterized in that, The capture device (114) is made of shape memory metal.

7. The puncture device and tissue suturing system according to claim 6, characterized in that, The capture device (114) includes a central hole (1142) whose diameter is adapted to the outer diameter of the puncture needle (360) so that the puncture needle (360) can pass through the central hole (1142).

8. The puncture device and tissue suturing system according to claim 7, characterized in that, The central hole (1142) has a boss structure (1143), which is interference-fitted with the outer diameter of the puncture needle (360) and adapted to the groove (362) of the puncture needle (360). When the puncture needle (360) punctures biological tissue, the groove of the puncture needle (360) is snapped into the boss structure (1143) of the capture device (114).

9. A puncture device and tissue suturing system according to any one of claims 1 to 8, characterized in that, The outer diameter of the hollow tube (342) is the same as that of the puncture needle (360), so that the circumferential surface of the hollow tube (342) and the puncture needle (360) are smoothly connected.

10. The puncture device and tissue suturing system according to claim 9, characterized in that, The puncture needle (360) includes a puncture needle tip (361), which is a conical structure with a cone angle of 20° to 70°.

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