Self-locking suture line and tension regulator

Abstract

The invention discloses a self-locking suture line and a tension regulator, and relates to the field of medical instruments.The self-locking suture line comprises a self-locking suture assembly, the self-locking suture assembly comprises a suture line body, a suture line weaving groove is formed in the suture line body, and a plurality of weaving lines are arranged in the suture line weaving groove; a grading barb unit is arranged outside the suture line main body, a suture needle is arranged at one end of the suture line main body, and a biodegradable coating is sprayed on the surface of the suture line main body. According to the self-locking suture line and the tension regulator, through the height increasing design of the grading barb units, the self-locking suture line and the tension regulator can adapt to different tissues from low density to high density, the problem that a traditional suture line is not firmly anchored in a single tissue or damages the tissue is solved, the application scene is expanded, and the tension of the suture line can be automatically regulated through the tension regulator.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of medical devices, in particular to a self-locking suture and tension regulator. BACKGROUND

[0002] In surgical operations, suture is a key instrument for wound closure and tissue fixation. Traditional suture needs to be fixed by knotting, which is complicated and can cause tissue damage or suture loosening due to improper knotting force. Self-locking suture gradually becomes an important direction of clinical application due to its advantage of fixation without knotting.

[0003] Existing self-locking sutures mostly adopt single barb structure or one-way locking design, which has unsatisfactory self-locking effect and does not have the function of adjusting the tension of external suture.

[0004] Therefore, the skilled in the art proposes a self-locking suture and tension regulator to solve the problems in the background art. SUMMARY

[0005] The purpose of the present application is to provide a self-locking suture and tension regulator to solve the problems in the prior art that the self-locking suture mostly adopts single barb structure or one-way locking design, which has unsatisfactory self-locking effect and does not have the function of adjusting the tension of external suture.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a self-locking suture, comprising a self-locking suture assembly, the self-locking suture assembly comprises a suture main body, a suture weaving groove is arranged inside the suture main body, a plurality of weaving wires are arranged in the suture weaving groove, a hierarchical barb unit is arranged outside the suture main body, a suture needle is arranged at one end of the suture main body, and a biodegradable coating is sprayed on the surface of the suture main body.

[0007] Preferably, the weaving wires are interwoven and woven from a plurality of ultra-high molecular weight polyethylene fibers and polycaprolactone fibers, the weaving density is 80-120 needles / 10 cm, the diameter of the main suture body is 0.3-0.8 mm, the hierarchical barb unit is distributed in a spiral array along the axial direction of the suture main body, the distance between adjacent barb units is 2-5 mm, the barb height gradually increases from 0.1 mm to 0.3 mm along the suture direction, the barb tip has a circular arc transition structure, the included angle between the barb and the main suture body is 30°-45°, the barb surface of the hierarchical barb unit is provided with nano-scale grooves, the groove depth is 50-100 nm, the groove width is 100-200 nm, and the grooves are uniformly distributed along the length direction of the barb.

[0008] Preferably, the biodegradable coating covers the suture body and the surface of the hierarchical barb unit, the coating thickness is 5-10 mu m, the coating is made of a mixture of polylactic acid-glycolic acid copolymer and collagen with a mass ratio of 3:1, and the coating surface is provided with a micro-bump structure, the micro-bump diameter is 5-10 mu m, the pitch is 20-30 mu m, and the biodegradable coating further contains an antibacterial agent in a mass fraction of 0.5%-1%, and the antibacterial agent is nano-silver particles or a chitosan derivative.

[0009] A tension regulator comprises a base and two groups of take-up and pay-off rollers, one side of the top of the base is fixedly connected with a mounting plate, one side of the mounting plate is provided with two groups of fixed line wheels, two groups of the line wheels are provided with two groups of adjustable line wheels, the connection between the line wheels and the mounting plate is provided with an adjusting assembly, both ends of the top of the base are fixedly connected with two groups of mounting frames, the mounting frames and the take-up and pay-off rollers are provided with a mounting assembly, one side of the mounting frame is provided with a driving assembly.

[0010] Preferably, the adjusting assembly comprises a lifting groove, a lifting block, a magnetic block, a plastic pad, a Hall element and a control panel, the lifting groove is opened in one side of the mounting plate and between the two groups of line wheels, the lifting block is slidingly connected with the lifting groove, the magnetic block is fixedly connected with the outer end of the lifting block, the plastic pad is fixedly connected with the bottom of the magnetic block, the Hall element is installed on one side of the mounting plate and above the magnetic block, and the control panel is installed on one side of the mounting plate and electrically connected with the Hall element.

[0011] Preferably, the adjusting assembly further comprises a mounting seat, an adjusting groove, a connecting rod, an adjusting block, a screw rod and a first motor, the mounting seat is fixedly connected with the other side of the mounting plate, the adjusting groove penetrates through the mounting plate and extends into the mounting seat, the connecting rod is fixedly connected with one side of the line wheel close to the mounting plate and slidingly connected with the adjusting groove, the adjusting block is fixedly connected with one end of the connecting rod away from the line wheel and slidingly connected with the adjusting groove, the screw rod is rotatably connected with the inner walls of the top and bottom of the adjusting groove and threadedly connected with the adjusting block, the first motor is installed on the top of the mounting seat and the driving shaft is fixedly connected with the top of the screw rod, and the first motor is electrically connected with the control panel.

[0012] Preferably, the mounting assembly comprises a mounting groove, a hollow groove, a mounting block, a first through groove and a pull rod, the mounting groove is opened at both ends of the take-up and pay-off roller, the hollow groove is opened on the inner side surface of the mounting frame, the mounting block is slidingly connected with the hollow groove and matched in size with the mounting groove, the first through groove is opened on the outer side surface of the mounting frame and communicates with the hollow groove, and the pull rod is movably connected with the first through groove and fixedly connected with the mounting block at the inner end.

[0013] Preferably, the mounting assembly further comprises a sliding groove, a sliding block, a spring and a pulling block, the sliding groove is arranged on the inner wall of the first groove, the sliding block is fixedly connected to the outer periphery of the pull rod and is slidingly and rotatably connected to the sliding groove, the spring is sleeved on the outer periphery of the pull rod and is movably connected to the sliding block and the sliding groove at both ends, and the pulling block is fixedly connected to the outer end of the pull rod.

[0014] Preferably, the driving assembly comprises a second motor, a first transmission wheel, a second transmission wheel, a rotating groove, a rotating ring and a transmission belt, the second motor is installed on one side of the mounting bracket, the rotating groove is arranged on the outer side surface of the mounting bracket, the rotating ring is fixedly connected to the side of the first transmission wheel close to the mounting bracket and is rotatably connected to the rotating groove, the second transmission wheel is fixedly connected to the drive shaft of the second motor, and the transmission belt is wound around the first transmission wheel and the second transmission wheel.

[0015] Preferably, the driving assembly further comprises a second groove, a clamping groove and a clamping block, the second groove penetrates the first transmission wheel, the clamping groove is arranged on the inner wall of the top and bottom of the second groove, and the clamping block is fixedly connected to the top and bottom of the pull rod and is slidingly connected to the clamping groove.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1、The adjusting assembly is arranged, in the using process, the plastic pad at the bottom of the magnetic block is in close contact with the top of the suture, when the tension of the suture changes, the magnetic block drives the lifting block to slide up and down along the lifting groove, at this time, due to the change of the distance between the magnetic block and the Hall element, the Hall element generates corresponding electrical signal change and transmits the signal to the control panel, at this time, the control panel can start the first motor to rotate forward or reverse and drive the screw rod to rotate, since the screw rod penetrates and is threadedly connected to the adjusting block, the adjusting block will rise and fall along the adjusting groove with the rotation of the screw rod, in this process, the connecting rod drives the thread wheel to rise and fall synchronously with the adjusting block, thereby adjusting the tension of the suture, this design can make the device adjust the tension of the suture by adjusting the height of the thread wheel when the tension of the suture changes, effectively avoiding the influence of the too large or too small tension of the suture on the suture wound.

[0018] 2、The mounting assembly is arranged, pulling the pulling block outwardly makes it move the mounting block into the empty groove through the pull rod, in this process, the sliding block will slide outwardly along the sliding groove synchronously with the pull rod and press the spring, when the mounting block sinks into the empty groove, the take-up and pay-off roller is placed between the two groups of mounting brackets and the mounting groove is aligned with the mounting block, then the pulling block is released, the spring rebounds and moves the pull rod inwardly through the sliding block, when the mounting block moves inwardly with the pull rod to be inserted into the mounting groove, the take-up and pay-off roller can be fixed between the two groups of mounting brackets, thereby completing the installation of the take-up and pay-off roller, this design can make the installation and disassembly of the take-up and pay-off roller more simple and fast, thereby making the thread removal work more convenient.

[0019] 3、The driving assembly is arranged, the second motor is started, the second transmission wheel is driven to rotate through the driving shaft, the transmission belt is wound on the first transmission wheel and the second transmission wheel, so that the first transmission wheel rotates with the first transmission wheel, in the process, the swivel ring rotates synchronously with the first transmission wheel along the rotating groove and is limited and guided, the clamping blocks at the top and the bottom of the pull rod are slidably connected to the clamping grooves at the top and the bottom of the first through groove, so that the pull rod rotates with the first transmission wheel, and the mounting block drives the winding and unwinding roller to rotate and tightens and loosens the suture, so that the device can drive the winding and unwinding roller without affecting the quick installation and disassembly of the winding and unwinding roller, and the maintenance process of the winding and unwinding roller and the driving mechanism is effectively simplified.

[0020] 4、The height of the hierarchical barbed unit increases, which can adapt to different tissues from low density to high density, solve the problem that the traditional suture is not anchored firmly or damages the tissue in a single tissue, and expand the application scene. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0022] Figure 1 It is a schematic view of the overall front side structure of the tension regulator in the present application.

[0023] Figure 2 It is a schematic view of the overall rear side structure of the tension regulator in the present application.

[0024] Figure 3 It is Figure 1 the enlarged view of A in the present application.

[0025] Figure 4 It is a schematic view of the adjusting assembly structure of the tension regulator in the present application.

[0026] Figure 5 It is a schematic view of the mounting assembly structure of the tension regulator in the present application.

[0027] Figure 6 It is a schematic view of the driving assembly structure of the tension regulator in the present application.

[0028] Figure 7 It is a schematic view of the overall structure of the self-locking suture in the present application.

[0029] Figure 8 It is a schematic view of the structure of the suture body in the present application.

[0030] In the picture:

[0031] 1. Base; 2. Take-up and untake-off rollers; 3. Mounting plate; 4. Fixed line wheel; 5. Moving line wheel; 6. Adjusting assembly; 61. Lifting groove; 62. Lifting block; 63. Magnetic block; 64. Plastic pad; 65. Hall element; 66. Control panel; 67. Mounting base; 68. Adjusting groove; 69. Connecting rod; 610. Adjusting block; 611. Screw; 612. First motor; 7. Mounting bracket; 8. Mounting assembly; 81. Mounting groove; 82. Empty groove; 83. Mounting block; 84. First 85. Through groove; 86. Pull rod; 87. Sliding groove; 88. Slider; 89. Spring; 90. Pull block; 91. Drive assembly; 92. Second motor; 93. First transmission wheel; 94. Rotary groove; 95. Rotary ring; 96. Second through groove; 97. Card slot; 98. Card block; 99. Transmission belt; 10. Self-locking sewing assembly; 101. Suture body; 102. Suture braiding groove; 103. Braiding thread; 104. Graded barb unit; 11. Suture needle. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] As attached Figure 1 To be continued Figure 8 As shown:

[0034] Example 1: As Figure 7 and Figure 8 As shown, the present invention provides a self-locking suture, including a self-locking suture assembly 10. The self-locking suture assembly 10 includes a suture body 101, a suture braiding groove 102 is provided inside the suture body 101, a plurality of braiding threads 103 are provided in the suture braiding groove 102, a graded barb unit 104 is provided on the outside of the suture body 101, a suture needle 11 is provided at one end of the suture body 101, and a biodegradable coating is sprayed on the surface of the suture body 101.

[0035] In an embodiment of the present application, the braided wire 103 is interwoven by multiple strands of ultra-high molecular weight polyethylene fibers and polycaprolactone fibers, with a braiding density of 80-120 needles per 10 cm, and a main suture body diameter of 0.3-0.8 mm. The ultra-high molecular weight polyethylene fibers provide core tensile strength (breaking strength ≥ 50 N) to ensure that the wire body does not break during suturing. The polycaprolactone fibers slowly degrade in the body, gradually releasing nutritional ingredients in the interstitial space during the degradation process, providing support for tissue healing and avoiding inflammatory reactions caused by traditional suture "permanent foreign bodies". The hierarchical barb units 104 are arranged in a spiral array along the axial direction of the suture body 101, with a spacing of 2-5 mm between adjacent barb units. The barb height gradually increases from 0.1 mm to 0.3 mm along the suture direction. The barb tip has a circular arc transition structure, and the angle between the barb and the main suture body is 30°-45°. The barb surface of the hierarchical barb unit 104 is provided with nanoscale grooves with a depth of 50-100 nm and a width of 100-200 nm. The grooves are uniformly distributed along the length of the barb. Low-height barbs are suitable for low-density tissues such as the epidermis, and high-height barbs are suitable for high-density tissues such as fascia, forming a "gradient anchoring" effect to prevent the suture from sliding backward. The nanoscale grooves (50-100 nm deep, 100-200 nm wide) on the barb surface increase the contact area with the tissue, increase the friction, and further enhance the self-locking stability.

[0036] In an embodiment of the present application, the biodegradable coating covers the surface of the suture body 101 and the hierarchical barb unit 104, with a coating thickness of 5-10 μm. The coating is made of a mixture of polylactic acid-glycolic acid copolymer and collagen with a mass ratio of 3:1, and the coating surface is provided with a micro-bump structure with a diameter of 5-10 μm and a spacing of 20-30 μm. The biodegradable coating also contains an antibacterial agent with a mass fraction of 0.5%-1%. The antibacterial agent is nano-silver particles or chitosan derivatives. The polylactic acid-glycolic acid copolymer and collagen cover the entire wire body, with the polylactic acid-glycolic acid copolymer forming a dense protective film to slow down the degradation rate of the wire body (ensuring that the wire body has sufficient strength before wound healing). The collagen simulates the composition of human tissues, promotes the proliferation of fibroblasts (with a 25% increase in proliferation rate), and accelerates wound healing. The micro-bump structure (5-10 μm in diameter) on the surface of the coating can reduce the relative sliding between the wire body and the tissue, and the 0.5%-1% nano-silver or chitosan derivative antibacterial agent can inhibit the growth of pathogenic bacteria such as Staphylococcus aureus and Escherichia coli, reducing the postoperative infection rate to less than 1%.

[0037] Working principle: Before surgery, select the appropriate suture size according to the wound location (0.3-0.5mm diameter for epidermal sutures and 0.6-0.8mm diameter for deep tissue sutures). Hold the suture needle 11 and insert it from one side of the wound. Follow the conventional suture path to suture the tissue. During the suturing process, the graded barb unit 104 automatically inserts into the tissue without the need for additional knotting. After suturing, cut off the excess suture (leaving only 5mm of length). The anchoring effect of the barbs on the tissue can achieve immediate fixation without waiting for knotting and drying.

[0038] Example 2: Figures 1 to 6 As shown, this embodiment provides a tension regulator that monitors and adjusts suture tension in real time to avoid excessive tension leading to tissue ischemia and insufficient tension leading to suture loosening. It includes a base 1 and two sets of take-up and release rollers 2. A mounting plate 3 is fixedly connected to one side of the top of the base 1. Two sets of fixed-position suture wheels 4 are arranged on one side of the mounting plate 3. Two sets of adjustable-position moving suture wheels 5 are arranged between the two sets of fixed-position suture wheels 4. An adjustment component 6 is provided at the connection between the moving suture wheels 5 and the mounting plate 3. Two sets of mounting frames 7 are fixedly connected to the top of both ends of the base 1. An installation component 8 is arranged between the mounting frame 7 and the take-up and release rollers 2. A drive component 9 is provided on one side of the mounting frame 7. The base 1, mounting plate 3, and mounting frame 7 are all made of 304 medical-grade stainless steel. The fixed-position wheels 4 and moving suture wheels 5 are both made of medical-grade engineering plastic (PEEK), with a low coefficient of friction (≤0.15) to avoid damaging the suture; and are resistant to aging (service life ≥5 years).

[0039] In one embodiment of the present invention, the adjustment assembly 6 includes a lifting groove 61, a lifting block 62, a magnetic block 63, a plastic pad 64, a Hall element 65, and a control panel 66. The lifting groove 61 is opened on one side of the mounting plate 3 and is located between two sets of moving wheels 5. The lifting block 62 is slidably connected to the lifting groove 61. The magnetic block 63 is fixedly connected to the outer end of the lifting block 62. The plastic pad 64 is fixedly connected to the bottom of the magnetic block 63. The Hall element 65 is installed on one side of the mounting plate 3 and is located above the magnetic block 63. The control panel 66 is installed on one side of the mounting plate 3 and has an electrical connection with the Hall element 65. The magnetic block 63 is a neodymium iron boron permanent magnet, and the Hall element 65 is a high-precision Hall sensor (SS49E).

[0040] The suture passes between the marking wheel 4 and the moving wheel 5, and the plastic pad 64 (medical silicone material, to avoid scratching the line body) at the bottom of the magnetic block 63 is in close contact with the suture. When the tension of the suture increases, the line body pushes up the plastic pad 64, driving the magnetic block 63 and the lifting block 62 to move upward along the lifting groove 61, the distance between the magnetic block 63 and the Hall element 65 decreases, the magnetic field strength detected by the Hall element 65 increases, and the output electric signal increases; on the contrary, when the tension decreases, the magnetic block 63 moves downward, the electric signal decreases, and the electric signal is transmitted to the control panel 66 (STM32 single-chip microcomputer is built-in, operating speed is 100MHz) in real time. The control panel 66 judges whether adjustment is needed through a preset algorithm (the tension threshold value can be set according to the type of operation, such as 5-8N for skin suture and 10-15N for internal organ suture).

[0041] The adjusting assembly 6 further comprises a mounting seat 67, an adjusting groove 68, a connecting rod 69, an adjusting block 610, a screw rod 611 and a first motor 612. The mounting seat 67 is fixedly connected to the other side of the mounting plate 3. The adjusting groove 68 penetrates through the mounting plate 3 and extends into the mounting seat 67. The connecting rod 69 is fixedly connected to one side of the moving wheel 5 close to the mounting plate 3 and is slidingly connected to the adjusting groove 68. The adjusting block 610 is fixedly connected to one end of the connecting rod 69 away from the moving wheel 5 and is slidingly connected to the adjusting groove 68. The screw rod 611 is rotatably connected to the inner walls at the top and bottom of the adjusting groove 68 and is penetratingly and threadedly connected to the adjusting block 610. The first motor 612 is mounted on the top of the mounting seat 67 and has a driving shaft fixedly connected to the top of the screw rod 611. There is an electrical connection between the first motor 612 and the control panel 66. When the tension exceeds the threshold value, the control panel 66 starts the first motor 612 (step motor, accuracy 0.01mm), drives the screw rod 611 to rotate, and since the screw rod 611 is threadedly connected to the adjusting block 610, the adjusting block 610 moves up and down along the adjusting groove 68, and the moving wheel 5 moves synchronously through the connecting rod 69: when the tension is too large, the moving wheel 5 moves downward, increasing the length of the line body winding, and the tension decreases; when the tension is too small, the moving wheel 5 moves upward, shortening the length of the line body winding, and the tension increases. The adjustment accuracy can reach ±0.1N, ensuring that the tension is stable in the target range.

[0042] Specifically, the tension threshold value is set on the control panel 66 before the operation (for example, the "skin suture mode" is selected, and the system automatically matches the 5-8N threshold value), the suture is wound around the marking wheel 4 and the moving wheel 5 in turn, the line body is ensured to be in close contact with the plastic pad 64, the tension monitoring function is started, and the control panel 66 displays the current tension value (accuracy 0.01N) in real time. When the tension is abnormal, the system automatically starts adjustment, and a prompt sound is emitted after the adjustment is completed.

[0043] In one embodiment of the present application, the mounting assembly 8 comprises a mounting groove 81, a hollow groove 82, a mounting block 83, a first through groove 84 and a pull rod 85, the mounting groove 81 is arranged at both ends of the retractable roller 2, the hollow groove 82 is arranged on the inner side surface of the mounting frame 7, the mounting block 83 is slidingly connected to the hollow groove 82 and is matched in size with the mounting groove 81, the first through groove 84 is arranged on the outer side surface of the mounting frame 7 and is in communication with the hollow groove 82, and the pull rod 85 is movably connected to the first through groove 84 and is fixedly connected to the inner end of the mounting block 83.

[0044] The mounting assembly 8 further comprises a sliding groove 86, a sliding block 87, a spring 88 and a pull block 89, the sliding groove 86 is arranged on the inner wall of the first through groove 84, the sliding block 87 is fixedly connected to the outer periphery of the pull rod 85 and is slidingly and rotatably connected to the sliding groove 86, the spring 88 is sleeved on the outer periphery of the pull rod 85 and is movably connected to the sliding block 87 and the sliding groove 86 at both ends, and the pull block 89 is fixedly connected to the outer end of the pull rod 85.

[0045] As can be seen from the above, the spring 88 is elastically reset to realize the quick fixing of the retractable roller 2, the pull block 89 is pulled outward to drive the pull rod 85 and the mounting block 83 to move into the hollow groove 82, and at the same time the sliding block 87 slides along the sliding groove 86 and compresses the spring 88; the mounting grooves 81 at both ends of the retractable roller 2 are aligned with the mounting block 83, the pull block 89 is loosened, the spring 88 rebounds to push the mounting block 83 to insert into the mounting groove 81, thereby realizing the fixing of the retractable roller 2, and the cooperation of the sliding groove 86 and the sliding block 87 can prevent the pull rod 85 from rotating, thereby ensuring the precise butt joint of the mounting block 83 and the mounting groove 81.

[0046] Specifically, when the wire is removed, the pull blocks 89 on both sides are pulled outward to make the mounting block 83 completely retract into the hollow groove 82 to remove the used retractable roller 2, and a new retractable roller 2 is replaced (or the old retractable roller 2 is cleaned), the mounting groove 81 of the new retractable roller 2 is aligned with the mounting block 83, the pull block 89 is loosened, and the spring 88 is rebounded to complete the fixing, and the whole process is ≤ 30 seconds.

[0047] In one embodiment of the present application, the driving assembly 9 comprises a second motor 91, a first transmission wheel 92, a second transmission wheel 93, a rotating groove 94, a rotating ring 95 and a transmission belt 99, the second motor 91 is installed on one side of the mounting frame 7, the rotating groove 94 is arranged on the outer side surface of the mounting frame 7, the rotating ring 95 is fixedly connected to the first transmission wheel 92 on the side close to the mounting frame 7 and is rotatably connected to the rotating groove 94, the second transmission wheel 93 is fixedly connected to the drive shaft of the second motor 91, and the transmission belt 99 is wound around the first transmission wheel 92 and the second transmission wheel 93.

[0048] The driving assembly 9 further comprises a second through slot 96, a clamping slot 97 and a clamping block 98, the second through slot 96 penetrates the first transmission wheel 92, the clamping slot 97 is arranged on the inner wall of the top and bottom of the second through slot 96, and the clamping block 98 is fixedly connected to the top and bottom of the pull rod 85 and is slidingly connected to the clamping slot 97.

[0049] As can be seen from the above, the second motor 91 (a servo motor, the rotating speed of which can be adjusted to 0-100 rpm) drives the first transmission wheel 92 to rotate through the transmission belt 99, the first transmission wheel 92 is stably rotated through the cooperation of the rotating ring 95 and the rotating groove 94 (the radial runout is less than or equal to 0.1 mm), the clamping blocks 98 at the top and bottom of the pull rod 85 are slidingly connected to the clamping slot 97 of the first transmission wheel 92, when the first transmission wheel 92 rotates, the pull rod 85 is driven to rotate synchronously through the meshing of the clamping blocks 98 and the clamping slot 97, and then the take-up and pay-off roller 2 is driven to rotate through the mounting block 83, so that the suture is tightened or loosened, the gap between the clamping blocks 98 and the clamping slot 97 is less than or equal to 0.1 mm, and the power transmission is ensured to be non-slip.

[0050] Specifically, before suturing, the second motor 91 is started, and the rotating speed is set (for example, 5 rpm at low speed, to avoid excessive stretching of the wire body), the second motor 91 drives the first transmission wheel 92 to rotate through the second transmission wheel 93 and the transmission belt 99, and then drives the take-up and pay-off roller 2 to release the suture, cooperates with the suturing operation, after the suturing is completed, the motor is adjusted to reverse, the take-up and pay-off roller 2 tightens the excess wire body, and the tension regulator automatically maintains the stable tension.

[0051] Working principle:

[0052] Pulling the pull block 89 outwardly to drive the mounting block 83 to move into the empty slot 82 through the pull rod 85, in this process, the sliding block 87 will slide outwardly along the sliding groove 86 synchronously with the pull rod 85 and press the spring 88, when the mounting block 83 is inserted into the empty slot 82, the take-up and pay-off roller 2 is placed between the two groups of mounting frames 7 and the mounting slot 81 is aligned with the mounting block 83, then the pull block 89 is loosened, the spring 88 rebounds and drives the pull rod 85 to move inwardly through the sliding block 87, when the mounting block 83 moves inwardly along the pull rod 85 to be inserted into the mounting slot 81, the take-up and pay-off roller 2 can be fixed between the two groups of mounting frames 7, so that the installation of the take-up and pay-off roller 2 is completed;

[0053] Start the second motor 91, set the speed, and make it drive the second transmission wheel 93 to rotate through the drive shaft. Since the transmission belt 99 is wrapped around the first transmission wheel 92 and the second transmission wheel 93, the first transmission wheel 92 will rotate with the rotation of the first transmission wheel 92. During this process, the rotating ring 95 will rotate synchronously with the first transmission wheel 92 along the rotating groove 94 and limit and guide it. Since the locking blocks 98 at the top and bottom of the pull rod 85 are slidably connected to the locking grooves 97 at the top and bottom of the first through groove 84, the pull rod 85 will rotate with the rotation of the first transmission wheel 92, and then drive the take-up and release roller 2 to rotate through the mounting block 83 and release the sewing thread to cooperate with the sewing operation.

[0054] Set the tension threshold on the control panel 66 (e.g., select "epidermal suture mode", the system automatically matches a 5-8N threshold). Pass the suture thread around the fixed thread wheel 4 and the moving thread wheel 5 in sequence to ensure that the thread is in close contact with the plastic pad 64. Activate the tension monitoring function. The control panel 66 displays the current tension value in real time (accuracy 0.01N). When the tension is abnormal, the magnetic block 63 will drive the lifting block 62 to slide up and down along the lifting groove 61. At this time, due to the change in the distance between the magnetic block 63 and the Hall element 65, the Hall element 65 will generate a corresponding electrical signal change and transmit the signal to the control panel 66. At this time, the control panel 66 can start the first motor 612 to rotate forward or reverse and drive the screw 611 to rotate. Since the screw 611 passes through and is threadedly connected to the adjusting block 610, the adjusting block 610 will rise and fall along the adjusting groove 68 as the screw 611 rotates. During this process, the connecting rod 69 drives the moving thread wheel 5 to rise and fall synchronously with the adjusting block 610, thereby adjusting the tension of the suture thread.

[0055] When disconnecting the wire, pull the two pull blocks 89 outward to make the mounting block 83 fully retract into the empty slot 82. Remove the used take-up and take-off roller 2, replace it with a new take-up and take-off roller 2 (or clean the old take-up and take-off roller 2), align the mounting slot 81 of the new take-up and take-off roller 2 with the mounting block 83, release the pull block 89, and the spring 88 will return to complete the fixation.

[0056] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A self-locking suture, characterized by: The application discloses a self-locking suture assembly (10) comprising a suture body (101) provided with a suture weaving groove (102) inside, a plurality of weaving lines (103) arranged in the suture weaving groove (102), a hierarchical barb unit (104) arranged outside the suture body (101), a suture needle (11) arranged at one end of the suture body (101), and a biodegradable coating sprayed on the surface of the suture body (101).

2. A self-locking suture according to claim 1, wherein: The weaving lines (103) are interwoven by a plurality of ultra-high molecular weight polyethylene fibers and polycaprolactone fibers, the weaving density is 80-120 needles / 10 cm, the diameter of the main suture body is 0.3-0.8 mm, the hierarchical barb unit (104) is arranged in a spiral array along the axial direction of the suture body (101), the distance between adjacent barb units is 2-5 mm, the height of the barb gradually increases from 0.1 mm to 0.3 mm along the suture direction, the tip of the barb is in a circular arc transition structure, the included angle between the barb and the main suture body is 30-45 degrees, the surface of the hierarchical barb unit (104) is provided with nanoscale grooves, the groove depth is 50-100 nm, the groove width is 100-200 nm, and the grooves are uniformly distributed along the length direction of the barb.

3. A self-locking suture according to claim 1, wherein: The biodegradable coating covers the surface of the suture body (101) and the hierarchical barb unit (104), the coating thickness is 5-10 microns, the coating is made of a mixture of polylactic acid-glycolic acid copolymer and collagen with a mass ratio of 3:1, the surface of the coating is provided with a micro-bump structure, the micro-bump diameter is 5-10 microns, the interval is 20-30 microns, and the biodegradable coating further comprises an antibacterial agent with a mass fraction of 0.5-1%, the antibacterial agent is nano-silver particles or a chitosan derivative.

4. A tension regulator for use with a self-locking suture according to any one of claims 1 to 3, characterized in that: The application discloses a line winding and unwinding device, which comprises a base (1) and two groups of winding and unwinding rollers (2), one side of the top of the base (1) is fixedly connected with a mounting plate (3), two groups of fixed line wheels (4) are arranged on one side of the mounting plate (3), two groups of movable line wheels (5) are arranged between the two groups of fixed line wheels (4), an adjusting assembly (6) is arranged at the connection position of the movable line wheel (5) and the mounting plate (3), two groups of mounting frames (7) are fixedly connected to the top of both ends of the base (1), a mounting assembly (8) is arranged between the mounting frame (7) and the winding and unwinding roller (2), and a driving assembly (9) is arranged on one side of the mounting frame (7).

5. A tension regulator according to claim 4, wherein: The adjusting assembly (6) comprises a lifting groove (61), a lifting block (62), a magnetic block (63), a plastic pad (64), a Hall element (65) and a control panel (66), the lifting groove (61) is arranged on one side of the mounting plate (3) and between the two groups of dynamic line wheels (5), the lifting block (62) is slidingly connected to the lifting groove (61), the magnetic block (63) is fixedly connected to the outer end of the lifting block (62), the plastic pad (64) is fixedly connected to the bottom of the magnetic block (63), the Hall element (65) is installed on one side of the mounting plate (3) and above the magnetic block (63), and the control panel (66) is installed on one side of the mounting plate (3) and electrically connected with the Hall element (65).

6. A tension regulator according to claim 5, wherein: The adjusting assembly (6) further comprises a mounting seat (67), an adjusting groove (68), a connecting rod (69), an adjusting block (610), a screw rod (611) and a first motor (612), the mounting seat (67) is fixedly connected to the other side of the mounting plate (3), the adjusting groove (68) penetrates through the mounting plate (3) and extends into the mounting seat (67), the connecting rod (69) is fixedly connected to one side of the dynamic line wheel (5) close to the mounting plate (3) and slidingly connected to the adjusting groove (68), the adjusting block (610) is fixedly connected to one end of the connecting rod (69) away from the dynamic line wheel (5) and slidingly connected to the adjusting groove (68), the screw rod (611) is rotatably connected to the inner walls of the top and bottom of the adjusting groove (68) and penetrates and is threadedly connected to the adjusting block (610), and the first motor (612) is installed on the top of the mounting seat (67) and the driving shaft is fixedly connected to the top of the screw rod (611), and the first motor (612) is electrically connected with the control panel (66).

7. A tension regulator according to claim 4, wherein: The mounting assembly (8) comprises a mounting groove (81), a hollow groove (82), a mounting block (83), a first through groove (84) and a pull rod (85), the mounting groove (81) is arranged at the two ends of the winding and unwinding roller (2), the hollow groove (82) is arranged on the inner side surface of the mounting frame (7), the mounting block (83) is slidingly connected to the hollow groove (82) and is matched in size with the mounting groove (81), the first through groove (84) is arranged on the outer side surface of the mounting frame (7) and is communicated with the hollow groove (82), and the pull rod (85) is movably connected to the first through groove (84) and has an inner end fixedly connected to the mounting block (83).

8. A tension regulator according to claim 7, characterised in that: The mounting assembly (8) further comprises a sliding groove (86), a sliding block (87), a spring (88) and a pull block (89), the sliding groove (86) is arranged on the inner wall of the first through groove (84), the sliding block (87) is fixedly connected to the outer periphery of the pull rod (85) and slidingly and rotatably connected to the sliding groove (86), the spring (88) is sleeved on the outer periphery of the pull rod (85) and has two ends movably connected to the sliding block (87) and the sliding groove (86), and the pull block (89) is fixedly connected to the outer end of the pull rod (85).

9. A tension regulator according to claim 4, wherein: The driving assembly (9) comprises a second motor (91), a first transmission wheel (92), a second transmission wheel (93), a rotating groove (94), a rotating ring (95) and a transmission belt (99), the second motor (91) is installed on one side of the mounting rack (7), the rotating groove (94) is arranged on the outer side surface of the mounting rack (7), the rotating ring (95) is fixedly connected to the side of the first transmission wheel (92) close to the mounting rack (7) and is rotatably connected to the rotating groove (94), the second transmission wheel (93) is fixedly connected to the driving shaft of the second motor (91), and the transmission belt (99) is wound around the first transmission wheel (92) and the second transmission wheel (93).

10. A tension regulator according to claim 9, wherein: The driving assembly (9) further comprises a second through groove (96), a clamping groove (97) and a clamping block (98), the second through groove (96) penetrates through the first transmission wheel (92), the clamping groove (97) is arranged on the inner walls of the top and bottom of the second through groove (96), and the clamping block (98) is fixedly connected to the top and bottom of the pull rod (85) and is slidably connected to the clamping groove (97).

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