A skin pulling device for emergency surgery

Abstract

The present invention relates to the technical field of skin traction devices, and discloses a skin traction device for emergency surgical operations, comprising a free arm, a visual acquisition probe mounted on the free arm, two traction mechanisms mounted on the free arm, the traction mechanism comprising a rotatable swing frame, a movable mobile arm mounted on the swing frame, a plurality of functional surfaces distributed in a circular array on the mobile arm, a group of regularly distributed positioning tubes mounted on each functional surface, a locking knob threadedly mounted on each positioning tube, a plurality of traction frames and a plurality of negative pressure tubes, each traction frame and each negative pressure tube being connected to the positioning tube via a quick connection mechanism, a winding roller driven by a first motor being rotatably mounted on the traction frame, a traction line being wound on the winding roller. The present invention innovatively constructs a dynamic protection system by integrating a high-precision tension sensor with a buffer capsule conductive fluid monitoring system, and the tension sensor collects traction force data in real time.

Description

Technical Field

[0001] The present invention relates to the technical field of skin pulling devices, and more particularly to a skin pulling device for emergency surgery. Background Art

[0002] In emergency surgery, skin retraction devices are key instruments for exposing surgical wounds and assisting in surgical field operations. However, existing technologies have the following significant drawbacks:

[0003] 1. Manual adjustment is inefficient and the pulling force is uneven. Traditional devices rely on manual positioning and pulling angle adjustment, lacking a real-time wound status feedback mechanism. This results in lengthy preoperative preparations. Manual pulling can easily cause secondary damage to local tissues due to uneven force, especially in complex wounds, where the pulling direction is difficult to accurately adapt.

[0004] 2. Limited spatial freedom. Existing equipment mostly uses a rigid fixed structure, which cannot achieve three-dimensional multi-degree-of-freedom adjustment. For example, when treating combined thoracic and abdominal trauma, the traction device has difficulty in synchronously adjusting the pitch angle and horizontal displacement, resulting in insufficient exposure of the surgical field and increasing the difficulty of surgical operation.

[0005] 3. The connection components are cumbersome to disassemble and assemble. The traditional traction frame and the negative pressure adsorption component are connected by threads or buckles. Disassembly and assembly take more than 30 seconds, and repeated operations can easily lead to component contamination. In contaminated trauma such as open fractures, this design significantly increases the risk of cross infection.

[0006] 4. Insufficient traction accuracy and response speed. Conventional traction wire retraction and extension mechanisms are controlled by rack and pinion gears or manual knobs, with adjustment accuracy only at the millimeter level. These mechanisms are unable to dynamically adapt to changes in the patient's position during surgery. For example, in facial reconstructive surgery, manual fine-tuning errors can easily lead to uneven skin tension distribution, affecting postoperative healing.

[0007] 5. Adhesive tape is difficult to remove and poses a high risk of injury. Traditional adhesive tape relies on mechanical peeling, which results in slow peel strength decay and can easily cause epidermal tears or colloid residue. Statistics show that approximately 25% of postoperative patients experience skin damage due to improper tape removal.

[0008] 6. Lack of dynamic traction force monitoring mechanism. Existing technologies do not integrate a real-time force feedback system, making it impossible to warn of traction overload. When the patient suddenly moves during surgery, the device may cause skin tears due to the instantaneous surge in tension, resulting in iatrogenic injury.

[0009] 7. Sensors have a high false alarm rate. Some devices using strain gauges or pressure sensors are susceptible to interference from ambient temperature and humidity, with a false alarm rate as high as 15%. For example, in a high-humidity surgical environment, signal drift may cause the protection mechanism to be falsely triggered, disrupting the surgical process.

[0010] Based on this, the present invention provides a skin pulling device for emergency surgery to solve the technical problems raised in the above background technology. Summary of the Invention

[0011] In order to overcome the shortcomings of the existing technology, the present invention provides a skin traction device for emergency surgery. The present invention innovatively constructs a dynamic protection system by integrating a high-precision tension sensor and a buffer bag conductive fluid monitoring system. The tension sensor collects tension force data in real time.

[0012] To achieve the above-mentioned object, the present invention provides the following technical solution: a skin pulling device for emergency surgery, comprising a free arm, a visual acquisition probe mounted on the free arm, and two pulling mechanisms mounted on the free arm;

[0013] The pulling mechanism includes a rotatable swing frame, on which a movable moving arm is mounted, and the moving arm is provided with a plurality of functional surfaces distributed in a circumferential array, each of which is mounted with a group of regularly distributed positioning tubes, and each of which is threaded with a locking knob;

[0014] The lifting mechanism comprises a lifting mechanism, a lifting mechanism comprises a lifting mechanism, and a lifting mechanism comprises a lifting mechanism comprising a first lifting mechanism, a second lifting mechanism comprising a lifting mechanism for lifting a lifting device, and a lifting mechanism for lifting a lifting device. The lifting mechanism comprises a lifting mechanism for lifting a lifting device, a lifting mechanism for lifting a lifting device, and a lifting mechanism for lifting a lifting device. The lifting mechanism comprises a lifting mechanism, a lifting mechanism for lifting a lifting device, and a lifting mechanism for lifting a lifting device. The lifting mechanism comprises a lifting mechanism, a lifting mechanism for lifting a lifting device, and a lifting mechanism for lifting a lifting device. The lifting mechanism comprises a lifting mechanism, a lifting mechanism for lifting a lifting device, and a lifting mechanism for lifting a lifting device.

[0015] As a preferred technical solution of the present invention, it also includes a support frame, a movable arm is hinged on the support frame, the front end of the movable arm is hinged to the free arm, a group of arm adjustment push rods are hinged between the movable arm and the support frame and between the free arm and the movable arm, a display screen is rotatably installed on the top of the support frame, an electric control box electrically connected to the display screen is installed on the side of the support frame, a single-chip microcomputer and a battery are integrated in the electric control box, the single-chip microcomputer is powered by the battery, and the data ends of the visual acquisition probe and the display screen are both connected to the single-chip microcomputer data.

[0016] As a preferred technical solution of the present invention, the swing frame is hinged on the free arm, an electric push rod is hinged between the free arm and the swing frame, a second linear transmission module is installed on the swing frame, the second linear transmission module is connected to the movable arm, and the movable arm is slidably installed on the swing frame.

[0017] As a preferred technical solution of the present invention, the quick connection mechanism includes a quick connection rod slidably connected to the positioning tube, the cross-section of the quick connection rod is an inverted T-shape, a magnetic plate is installed on the top of the quick connection rod, and the magnetic plate is square. The pulling frame and the negative pressure tube are both provided with a slot for connecting with the magnetic plate.

[0018] As a preferred technical solution of the present invention, a first worm is fixedly installed on the output shaft end of the first motor, a first gear is installed on the top of the winding roller, the first worm is connected to the first gear, a second gear is installed on the corner block, a second motor is installed on the adjusting arm, and a second worm is fixedly installed on the output shaft end of the second motor and is connected to the second gear.

[0019] As a preferred technical solution of the present invention, the bottom surface of the Velcro is fixedly provided with a Velcro hook surface, the top surface of the buffer capsule is fixedly provided with a Velcro fur surface bonded to the Velcro hook surface, the buffer capsule is made of a flexible conductive elastic material, and the interior of the buffer capsule is filled with a conductive fluid, which is a mixed suspension of liquid metal, ionic liquid and nano-silicon dioxide. The two ends of the conductive fluid are electrically connected to the single-chip computer through embedded electrodes.

[0020] As a preferred technical solution of the present invention, the resistance change signal of the conductive fluid is nonlinearly related to the deformation of the buffer capsule, and the single-chip microcomputer has a built-in adaptive filtering algorithm. The single-chip microcomputer collects the resistance change signal of the conductive fluid in real time, and calculates the real-time deformation of the buffer capsule according to a preset deformation-resistance relationship model. When the real-time deformation exceeds a first threshold, a first control instruction is generated to adjust the heating power of the electric heating block. When the real-time deformation exceeds a second threshold, a second control instruction is generated to trigger an overload alarm signal of the tension sensor. The single-chip microcomputer has a built-in temperature compensation algorithm to suppress the interference of ambient temperature and humidity on the resistance signal of the conductive fluid.

[0021] As a preferred technical solution of the present invention, the adhesive tape includes a flexible base layer and an adhesive layer connected in sequence from the outside to the inside, the flexible base layer is connected to the buffer bag through a hot pressing process, the flexible base layer is made of silicone rubber, the thickness of the flexible base layer is 0.2mm to 0.5mm, the adhesive layer is a heat-activated pressure-sensitive adhesive, the thickness of the adhesive layer is 0.05mm to 0.15mm, and the peel strength attenuation rate of the adhesive layer within 40°C to 60°C is ≥50%.

[0022] As a preferred technical solution of the present invention, the traction wire is composed of ultra-high molecular weight polyethylene fiber and nickel-titanium alloy wire spirally wound, the single wire diameter is 0.3mm to 0.8mm, and the outer diameter of the traction wire is 1.2±0.1mm.

[0023] As a preferred technical solution of the present invention, the negative pressure locking mechanism includes a negative pressure suction cup that is slidably connected to the negative pressure tube, a negative pressure pump is installed on the negative pressure tube, the negative pressure port of the negative pressure pump is connected to the negative pressure tube, and a limit spring is installed between the negative pressure tube and the negative pressure suction cup.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. Traditional skin traction devices lack a real-time force feedback mechanism, making them prone to iatrogenic injuries such as skin tears when the patient moves suddenly or when the traction is overloaded. This invention innovatively constructs a dynamic protection system by integrating a high-precision force sensor with a buffer capsule conductive fluid monitoring system. The force sensor collects traction force data in real time. The buffer capsule is filled with a mixed conductive fluid of liquid metal and ionic liquid, and its resistance changes in a nonlinear relationship with deformation. Combined with the microcontroller's built-in adaptive filtering algorithm and temperature compensation technology, the false alarm rate caused by environmental interference is reduced from 15% to below 1%. The system adopts a dual-threshold control strategy. When the deformation exceeds the first threshold, the electric heating block heats up to 50°C within 0.5 seconds, softening the heat-activated pressure-sensitive adhesive layer to reduce the bond strength. When the second threshold is exceeded, an overload alarm is immediately triggered and traction is stopped. This solution implements a three-level linkage of "monitoring-buffering-protection" and has a faster response than traditional mechanical buffer structures. It is particularly suitable for emergency surgery environments with high humidity and high vibration, significantly reducing the risk of traction overload.

[0026] 2. In response to the problem that the rigid structure of traditional traction devices cannot adapt to complex wounds, the present invention achieves three-dimensional spatial control with millimeter-level precision through a multi-axis linkage mechanical structure. The free arm and the swing frame are hinged by an electric push rod, and the second linear transmission module drives the movable arm to slide along the swing frame, which can quickly adapt to curved or asymmetric wounds. The support frame and the movable arm can achieve multi-degree-of-freedom adjustment of pitch and rotation through the arm adjustment push rod. Combined with the real-time surgical field image navigation of the visual acquisition probe and the display screen, the traction direction is perpendicular to the wound surface, and the surgical field exposure efficiency is improved. The adjustment accuracy of this system is improved by an order of magnitude compared with traditional manual operation, which is particularly suitable for scenarios such as facial repair that have extremely high requirements for traction uniformity.

[0027] 3. Traditional traction devices are complicated to disassemble and assemble due to the connection parts and are easy to be contaminated. The risk of cross infection is prominent in open fracture and other contaminated trauma surgeries. The present invention adopts a modular design of inverted T-shaped quick-connect rods and magnetic plate slots to achieve "one-touch-and-lock" disassembly and assembly in seconds. The circumferential array layout of the positioning tube supports multi-angle functional surface switching. The traction frame and negative pressure tube can be quickly replaced, and the traction strategy can be adjusted immediately during the operation. The magnetic connection method avoids mechanical wear of threads or buckles, reduces the risk of contamination, and improves operating efficiency, fully meeting the stringent timeliness requirements of the "golden treatment period" of emergency surgery.

[0028] 4. Traditional adhesive tapes rely on mechanical peeling, which can easily cause epidermal damage. The present invention completely solves this pain point through material innovation and intelligent heating technology. The adhesive tape adopts a composite structure of a 0.2mm silicone rubber flexible base layer and a heat-activated pressure-sensitive adhesive. The peeling strength of the adhesive layer decays by ≥50% at 40℃-60℃. During the operation, the electric heating block triggers heating, and the adhesive layer softens within 3 seconds to achieve painless disassembly, reducing the peeling damage rate. The buffer capsule further disperses the tensile stress to avoid edge debonding caused by local pressure concentration. This design not only eliminates colloid residue, but also significantly shortens postoperative processing time, which is in line with the concept of minimally invasive surgery.

[0029] 5. In order to solve the problem of traditional metal traction wires being prone to fatigue fracture and nylon wires being too ductile, the present invention proposes a composite traction wire made of ultra-high molecular weight polyethylene fiber and nickel-titanium alloy wire spirally wound. The traction wire has a tensile strength of more than 200N and a service life of 10 5 After one cycle, the wire is 60% lighter than pure metal wire. The nickel-titanium alloy gives it shape memory properties and automatically returns to a straight state after bending. The worm gear transmission system achieves millimeter-level retraction and extension accuracy. The multi-angle adjustment of the wire roller ensures that the traction direction is accurately adapted to the wound morphology. The system has improved anti-bending performance in dynamic traction scenarios such as limb joints, solving the reliability bottleneck of traditional traction lines.

[0030] 6. Traditional devices cause unstable surgical field exposure due to displacement during traction. The present invention achieves full-area stable control through negative pressure adsorption and elastic limit design. The negative pressure suction cup elastically adsorbs the skin in the non-traction area through the limit spring, and the negative pressure pump provides a constant negative pressure of -80kPa, with strong anti-interference ability. The system and the traction mechanism work together to form an "active traction-passive fixation" dual mode, which improves the stability of the device and is especially suitable for surgery on obese patients or loose skin areas. Experiments show that when the patient's position changes, the negative pressure adsorption force can offset more than 80% of the displacement interference, ensuring that the surgical field remains clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of a skin pulling device for emergency surgery according to the present invention;

[0032] Figure 2 For the present invention Figure 1Structural diagram from another perspective;

[0033] Figure 3 This is a schematic structural diagram of the movable arm and positioning tube of the present invention;

[0034] Figure 4 This is a structural diagram of the second motor and the pulling frame of the present invention;

[0035] Figure 5 Schematic diagram of the structure of the quick-connect rod and the first worm gear of the present invention;

[0036] Figure 6 It is a structural schematic diagram of the tension sensor and the electric heating block of the present invention;

[0037] Figure 7 It is a structural schematic diagram of the hook surface and adhesive tape of the Velcro of the present invention;

[0038] Figure 8 This is a schematic structural diagram of the Velcro surface and the electric heating block of the present invention;

[0039] Figure 9 This is a schematic structural diagram of the positioning tube and magnetic plate of the present invention;

[0040] Figure 10 It is a structural schematic diagram of the negative pressure tube and negative pressure pump of the present invention.

[0041] In the figure: 1. Free arm; 2. Visual acquisition probe; 3. Swing frame; 4. Moving arm; 5. Positioning tube; 6. Locking knob; 7. Pulling frame; 8. Negative pressure tube; 9. First motor; 10. Winding roller; 11. Pulling line; 12. Adjusting arm; 13. First linear transmission module; 14. Corner block; 15. Wire roller; 16. Velcro; 17. Tension sensor; 18. Electric heating block; 19. Buffer capsule; 20. Adhesive tape; 21 , support frame; 22. movable arm; 23. arm-adjusting push rod; 24. display screen; 25. electric control box; 26. second linear transmission module; 27. electric push rod; 28. quick-connect rod; 29. magnetic plate; 30. first worm; 31. first gear; 32. second gear; 33. second motor; 34. second worm; 35. Velcro hook surface; 36. Velcro fleece surface; 37. negative pressure suction cup; 38. negative pressure pump; 39. limit spring. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 efforts are within the scope of protection of the present invention.

[0043] like Figures 1 to 10 As shown, the present invention provides a skin pulling device for emergency surgery, comprising a free arm 1, a visual acquisition probe 2 is mounted on the free arm 1, and two pulling mechanisms are mounted on the free arm 1;

[0044] The pulling mechanism includes a rotatable swing frame 3, on which a movable moving arm 4 is mounted;

[0045] The swing frame 3 is hinged on the free arm 1, and an electric push rod 27 is hinged between the free arm 1 and the swing frame 3. A second linear transmission module 26 is installed on the swing frame 3, and the second linear transmission module 26 is connected to the movable arm 4 for transmission. The movable arm 4 is slidably installed on the swing frame 3.

[0046] This solution solves the pain points of traditional surgical traction devices, which rely on manual adjustment and cannot monitor the wound status in real time, through the collaborative design of the visual acquisition probe 2 on the free arm 1 and the two traction mechanisms.

[0047] During emergency surgery, the visual acquisition probe 2 captures the wound image in real time and transmits it to the display screen 24. Combined with the circumferential array distribution of the swing frame 3, movable arm 4, and positioning tube 5 of the traction mechanism, it can quickly adapt to different wound shapes and traction angles. For example, in an open abdominal wound, the movable arm 4 slides along the swing frame 3 via the second linear transmission module 26 to accurately position the traction frame 7 to the edge of the wound. The locking knob 6 is threadedly locked to form a stable support point. The traction wire 11 is retracted and released by the winding roller 10 to achieve dynamic adjustment of skin tension, significantly shortening preoperative preparation time while reducing the risk of secondary injury caused by uneven traction force.

[0048] The movable arm 4 is provided with a plurality of functional surfaces distributed in a circumferential array, each functional surface is provided with a group of regularly distributed positioning tubes 5, and each positioning tube 5 is threadedly provided with a locking knob 6;

[0049] It also includes a plurality of stretching frames 7 and a plurality of negative pressure tubes 8, each stretching frame 7 and each negative pressure tube 8 is connected to the positioning tube 5 through a quick connection mechanism;

[0050] The quick connection mechanism includes a quick connection rod 28 that is slidably connected to the positioning tube 5. The cross-section of the quick connection rod 28 is an inverted T-shape. A magnetic plate 29 is installed on the top of the quick connection rod 28. The magnetic plate 29 is square. Both the pulling frame 7 and the negative pressure tube 8 are provided with a slot for connecting with the magnetic plate 29.

[0051] The hinged structure of the support frame 21 and the movable arm 22, combined with the arm adjustment push rod 23, solves the problem that traditional traction equipment cannot be adjusted with multiple degrees of freedom. In emergency scenarios, medical staff control the extension and retraction of the arm adjustment push rod 23 through the electric control box 25, driving the movable arm 22 to rotate around the hinge point of the support frame 21. At the same time, the free arm 1 pitches synchronously with the movable arm 22 to achieve three-dimensional spatial positioning of the traction mechanism. For example, in chest penetrating injury surgery, the display screen 24 displays the traction status in real time. Medical staff adjust the angle of the free arm 1 through touch operation to make the traction line 11 perpendicular to the wound surface to ensure uniform traction. In addition, the integrated electric control box 25 and battery design get rid of the limitations of wired power supply, which is particularly suitable for field emergency or mobile surgery scenarios.

[0052] The hinged design of the swing frame 3 and the free arm 1, combined with the second linear transmission module 26, solves the problem of poor wound adaptability caused by the rigid fixation of the pulling mechanism. The swing frame 3 adjusts the angle with the free arm 1 through the arm adjustment push rod 23. When the movable arm 4 slides along the guide rail of the swing frame 3, the second linear transmission module 26 provides high-precision displacement control. In complex limb injuries, the movable arm 4 can quickly switch to different functional surfaces to adapt to curved or asymmetric wounds.

[0053] The inverted T-shaped quick-connect rod 28 and the magnetic plate 29 slot design of the connecting assembly solve the problems of cumbersome disassembly and easy contamination of traditional connection methods. During emergency surgery, the stretcher 7 and the negative pressure tube 8 are quickly snapped into the slot of the positioning tube 5 via the magnetic plate 29. The inverted T-shaped cross-section prevents lateral slippage. For example, when treating contaminated wounds, the negative pressure tube 8 can be replaced immediately through the quick connection mechanism to avoid cross infection. Compared with threaded or snap-on methods, the magnetic connection reduces operation time by 80%, which is particularly suitable for emergency situations such as heavy bleeding.

[0054] A winding roller 10 driven by a first motor 9 is rotatably mounted on the pulling frame 7. A first worm 30 is fixedly mounted on the output shaft end of the first motor 9. A first gear 31 is mounted on the top of the winding roller 10. The first worm 30 is in transmission connection with the first gear 31.

[0055] The worm gear transmission system and dual-motor drive design solve the problem of balancing the speed and precision of the traction line 11. The first motor 9 drives the worm to drive the gear of the winding roller 10, achieving millimeter-level precision in the traction line 11. The second motor 33 adjusts the second gear 32 of the corner block 14 through the worm to control the rotation angle of the wire roller 15. When fine-tuning skin tension, such as in facial reconstructive surgery, the system can synchronously adjust the length and pulling direction of the traction line 11 to ensure even tension distribution and avoid local overload caused by traditional manual adjustment.

[0056] A traction line 11 is wound on the winding roller 10, an adjusting arm 12 is slidably installed on the pulling frame 7, a first linear transmission module 13 is installed on the pulling frame 7, the first linear transmission module 13 is transmission-connected to the adjusting arm 12, a rotatable corner block 14 is installed on the adjusting arm 12, a second gear 32 is installed on the corner block 14, a second motor 33 is installed on the adjusting arm 12, and a second worm 34 transmission-connected to the second gear 32 is fixedly installed on the output shaft end of the second motor 33.

[0057] Two guide rollers 15 are rotatably mounted on the corner block 14;

[0058] A Velcro 16 is installed at the end of the traction line 11, and a tension sensor 17 is provided at the connection between the traction line 11 and the Velcro 16. An electric heating block 18 is built into the Velcro 16. A buffer bag 19 is bonded to the bottom end of the Velcro 16, and an adhesive tape 20 is fixed to the bottom surface of the buffer bag 19.

[0059] It also includes a support frame 21, on which a movable arm 22 is hinged, the front end of the movable arm 22 is hinged to the free arm 1, and a group of arm adjustment push rods 23 are hinged between the movable arm 22 and the support frame 21 and between the free arm 1 and the movable arm 22. A display screen 24 is rotatably installed on the top of the support frame 21, and an electric control box 25 electrically connected to the display screen 24 is installed on the side of the support frame 21. A single-chip microcomputer and a battery are integrated in the electric control box 25. The single-chip microcomputer is powered by the battery, and the data ends of the visual acquisition probe 2 and the display screen 24 are both connected to the single-chip microcomputer data.

[0060] The bottom surface of the Velcro 16 is fixedly provided with a Velcro hook surface 35, and the top surface of the buffer capsule 19 is fixedly provided with a Velcro fur surface 36 that is bonded to the Velcro hook surface 35. The buffer capsule 19 is made of a flexible conductive elastic material, and the interior of the buffer capsule 19 is filled with a conductive fluid, which is a mixed suspension of liquid metal, ionic liquid and nano-silicon dioxide. The two ends of the conductive fluid are electrically connected to the single-chip computer through embedded electrodes.

[0061] The flexible conductive material and conductive fluid filling design of the buffer capsule 19 resolves the safety hazard of the traditional adhesive tape 20's inability to dynamically sense pulling force. The resistance change of the conductive fluid is fed back to the microcontroller in real time. When the deformation of the buffer capsule 19 exceeds the threshold, the electric heating block 18 quickly heats up to 50°C to soften the adhesive layer and trigger an overload alarm. If the patient's sudden movement causes a surge in pulling force, the system activates the protection mechanism within 0.5 seconds to prevent skin tears. Compared with a purely mechanical buffer structure, the response speed is three times faster.

[0062] When the traction line 11 is subjected to sudden tension, such as a sudden stop during movement or external pulling, the buffer capsule 19 absorbs the impact energy through elastic deformation, preventing the stress from being directly transferred to the junction of the adhesive tape 20 and the skin contact surface, thereby reducing the risk of instantaneous peeling of the adhesive tape 20, improving the fixing stability, and protecting the bonded surface, such as the skin, from damage caused by excessive local pressure;

[0063] The flexibility of the cushioning bag 19 can disperse the concentrated force transmitted by the traction line 11 into uniform pressure, thus avoiding edge warping or local debonding caused by the rigid connection of the Velcro.

[0064] In scenarios where frequent movement is required, the cushioning bladder 19 allows for slight displacement between the Velcro and the adhesive tape 20, thus preventing adhesive failure due to repeated bending or friction;

[0065] The resistance change signal of the conductive fluid is nonlinearly related to the deformation of the buffer capsule 19, and the single-chip microcomputer has a built-in adaptive filtering algorithm. The single-chip microcomputer collects the resistance change signal of the conductive fluid in real time, and calculates the real-time deformation of the buffer capsule 19 according to the preset deformation-resistance relationship model. When the real-time deformation exceeds the first threshold, a first control instruction is generated to adjust the heating power of the electric heating block 18. The electric heating block 18 quickly heats up to 50°C to soften the adhesive layer. When the real-time deformation exceeds the second threshold, a second control instruction is generated to trigger the overload alarm signal of the tension sensor 17. The single-chip microcomputer has a built-in temperature compensation algorithm to suppress the interference of ambient temperature and humidity on the resistance signal of the conductive fluid.

[0066] A nonlinear resistance model and adaptive filtering algorithm solve the problem of false alarms caused by environmental interference. The microcontroller uses a preset deformation-resistance relationship model and a temperature compensation algorithm to convert the conductive fluid resistance signal into a precise deformation variable. In high-temperature and high-humidity surgical environments, adaptive filtering suppresses 50Hz power frequency interference, ensuring a detection error of ≤5%. Experimental data shows that this solution reduces the false alarm rate from the traditional 15% to below 1%.

[0067] The adhesive tape 20 includes a flexible base layer and an adhesive layer connected in sequence from the outside to the inside. The flexible base layer is connected to the buffer bag 19 through a hot pressing process. The flexible base layer is made of silicone rubber. The thickness of the flexible base layer is 0.2 mm. The adhesive layer is a heat-activated pressure-sensitive adhesive. The thickness of the adhesive layer is 0.05 mm. The peel strength attenuation rate of the adhesive layer within 40°C to 60°C is ≥50%.

[0068] The composite structure of a heat-activated pressure-sensitive adhesive layer and a flexible base layer eliminates the problem of adhesive tape 20 leaving residual colloid or causing skin damage. The flexible base layer is bonded to the cushioning bladder 19 through heat compression, providing soft support. When the electric heating block 18 is heated to 50°C, the peel strength of the heat-sensitive adhesive layer drops from 1.5N / cm to 0.5N / cm, enabling "one-click removal." After emergency surgery, medical staff trigger the heating command, and the adhesive tape 20 can be painlessly peeled off in 3 seconds, avoiding the epidermal damage caused by traditional tearing methods.

[0069] The traction wire 11 is formed by spirally winding ultra-high molecular weight polyethylene fiber and nickel-titanium alloy wire. The diameter of the single wire is 0.5 mm, and the outer diameter of the traction wire 11 is 1.2 mm.

[0070] The composite traction line 11 of ultra-high molecular weight polyethylene and nickel-titanium alloy wire solves the problem of easy fatigue fracture of traditional metal traction line 11 or excessive ductility of nylon line. Polyethylene fiber provides ultra-high tensile strength, and nickel-titanium alloy wire gives shape memory properties, which automatically restores to a straight state after multiple bends. In the traction of complex wounds, the traction line 11 can withstand a continuous tensile force of 200N and has a service life of 10 5 per cycle, the weight is reduced by 60% compared with pure metal wire, significantly reducing operating fatigue;

[0071] The negative pressure locking mechanism includes a negative pressure suction cup 37 that is slidably connected to the negative pressure tube 8. A negative pressure pump 38 is installed on the negative pressure tube 8. The negative pressure port of the negative pressure pump 38 is connected to the negative pressure tube 8. A limit spring 39 is installed between the negative pressure tube 8 and the negative pressure suction cup 37.

[0072] When the skin is pulled, the negative pressure suction cup 37 applies negative pressure to the non-pulled part of the skin, thereby accurately defining the position of the movable arm 4 and ensuring the stability of the device during the operation.

[0073] The working principle and use process of the present invention:

[0074] First, the device is fixed near the operating area through the support frame 21. The movable arm 22 and the free arm 1 on the support frame 21 are adjusted in multiple degrees of freedom through the arm adjustment push rod 23. The medical staff controls the extension and contraction of the arm adjustment push rod 23 through the electric control box 25, driving the movable arm 22 to rotate around the hinge point of the support frame 21. At the same time, the free arm 1 pitches synchronously with the movable arm 22. The position of the movable arm 4 is adjusted in combination with the second linear transmission module 26 on the swing frame 3 to accurately position the traction mechanism to the edge of the wound. The visual acquisition probe 2 at the front end of the free arm 1 captures the wound image in real time and transmits it to the display screen 24 to provide a visual reference for the medical staff. The traction mechanism enables multiple traction frames 7 to adapt to wounds of different shapes through the rotation of the swing frame 3 and the sliding of the movable arm 4.

[0075] The stretching frame 7 and the negative pressure tube 8 are quickly connected to the positioning tube 5 through a quick connection mechanism. The inverted T-shaped cross-section of the quick-connect rod 28 is inserted into the positioning tube 5. The magnetic plate 29 is attracted and locked with the slot on the stretching frame 7 or the negative pressure tube 8, achieving assembly and disassembly in seconds. The negative pressure tube 8 generates negative pressure through the negative pressure pump 38. The negative pressure suction cup 37 is adsorbed on the skin in the non-traction area, and cooperates with the limit spring 39 to stabilize the overall position of the device.

[0076] The traction line 11 is retracted and released by the winding roller 10 driven by the first motor 9. The worm and gear transmission system ensures that the traction line 11 can be adjusted with millimeter-level precision. The adjustment arm 12 slides through the first linear transmission module 13, driving the corner block 14 to rotate. The second motor 33 drives the worm to adjust the angle of the wire roller 15, thereby dynamically adjusting the pulling direction of the traction line 11. The Velcro 16 at the end of the traction line 11 is fixed to the skin surface by the adhesive tape 20. Its built-in tension sensor 17 monitors the pulling force in real time.

[0077] The cushioning bag 19 at the bottom of the Velcro 16 is filled with a conductive fluid. When deformed, the resistance change signal is transmitted to the single-chip microcomputer, which calculates the real-time deformation variable using a preset deformation resistance model. If the deformation variable exceeds a first threshold, the electric heating block 18 heats to 50°C to soften the heat-activated pressure-sensitive adhesive layer and reduce the bonding strength. If it exceeds a second threshold, an overload alarm is triggered to prevent skin tearing.

[0078] During the operation, the negative pressure suction cup 37 continuously absorbs the stabilizing device, and the display screen 24 simultaneously displays the traction status and wound image. After the operation, the medical staff activates the electric heating block 18 through the electric control box 25 to heat the wound, and the adhesive tape 20 is painlessly peeled off within 3 seconds. The entire process is powered by the integrated electric control box 25 and the battery, which is suitable for emergency and mobile surgery scenarios, and realizes high-precision, adaptive, and low-risk skin traction operations.

[0079] The negative pressure suction cup 37 is made of medical silicone.

[0080] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0081] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A skin pulling device for emergency surgery, comprising a free arm (1) and a single chip microcomputer, characterized in that: A visual acquisition probe (2) is installed on the free arm (1), and two pulling mechanisms are installed on the free arm (1); The pulling mechanism comprises a rotatable swing frame (3), a movable moving arm (4) is mounted on the swing frame (3), a plurality of functional surfaces distributed in a circumferential array are provided on the moving arm (4), a group of regularly distributed positioning tubes (5) are mounted on each functional surface, and a locking knob (6) is threadedly mounted on each positioning tube (5); The invention also includes a plurality of pulling frames (7) and a plurality of negative pressure tubes (8), each of the pulling frames (7) and each of the negative pressure tubes (8) is connected to the positioning tube (5) through a quick connection mechanism, a winding roller (10) driven by a first motor (9) is rotatably mounted on the pulling frame (7), a traction line (11) is wound on the winding roller (10), an adjusting arm (12) is slidably mounted on the pulling frame (7), a first linear transmission module (13) is mounted on the pulling frame (7), the first linear transmission module (13) is in transmission connection with the adjusting arm (12), and the adjusting A rotatable corner block (14) is installed on the arm (12), two wire rollers (15) are rotatably installed on the corner block (14), a magic tape (16) is installed at the end of the traction line (11), a tension sensor (17) is provided at the connection between the traction line (11) and the magic tape (16), an electric heating block (18) is built into the magic tape (16), a buffer capsule (19) is bonded to the bottom end of the magic tape (16), an adhesive tape (20) is fixedly installed on the bottom surface of the buffer capsule (19), and a negative pressure locking mechanism is provided on the negative pressure tube (8); The bottom surface of the Velcro (16) is fixedly provided with a Velcro hook surface (35), and the top surface of the buffer capsule (19) is fixedly provided with a Velcro fur surface (36) that is bonded to the Velcro hook surface (35). The buffer capsule (19) is made of a flexible conductive elastic material. The interior of the buffer capsule (19) is filled with a conductive fluid, which is a mixed suspension of liquid metal, ionic liquid and nano-silicon dioxide. Both ends of the conductive fluid are electrically connected to the single-chip computer through embedded electrodes. The resistance change signal of the conductive fluid is nonlinearly related to the deformation of the buffer capsule (19), and the single-chip microcomputer has a built-in adaptive filtering algorithm. The single-chip microcomputer collects the resistance change signal of the conductive fluid in real time and calculates the real-time deformation of the buffer capsule (19) according to a preset deformation-resistance relationship model. When the real-time deformation exceeds a first threshold, a first control instruction is generated to adjust the heating power of the electric heating block (18). When the real-time deformation exceeds a second threshold, a second control instruction is generated to trigger an overload alarm signal of the tension sensor (17). The single-chip microcomputer has a built-in temperature compensation algorithm to suppress the interference of ambient temperature and humidity on the resistance signal of the conductive fluid.

2. The skin pulling device for emergency surgery according to claim 1, characterized in that: The invention also includes a support frame (21), wherein a movable arm (22) is hingedly connected to the support frame (21), the front end of the movable arm (22) is hingedly connected to the free arm (1), and a group of arm adjustment push rods (23) are hingedly connected between the movable arm (22) and the support frame (21) and between the free arm (1) and the movable arm (22). A display screen (24) is rotatably mounted on the top of the support frame (21), and an electric control box (25) electrically connected to the display screen (24) is mounted on the side of the support frame (21). The single chip microcomputer is integrated in the electric control box (25), and a battery is provided in the electric control box (25). The single chip microcomputer is powered by the battery. The data ends of the visual acquisition probe (2) and the display screen (24) are both connected to the single chip microcomputer data.

3. The skin pulling device for emergency surgery according to claim 1, characterized in that: The swing frame (3) is hinged on the free arm (1), an electric push rod (27) is hinged between the free arm (1) and the swing frame (3), a second linear transmission module (26) is installed on the swing frame (3), the second linear transmission module (26) is in transmission connection with the movable arm (4), and the movable arm (4) is slidably installed on the swing frame (3).

4. The skin pulling device for emergency surgery according to claim 1, characterized in that: The quick connection mechanism includes a quick connection rod (28) slidably connected to the positioning tube (5), the cross section of the quick connection rod (28) is an inverted T-shape, a magnetic plate (29) is installed on the top end of the quick connection rod (28), and the magnetic plate (29) is square. The pulling frame (7) and the negative pressure tube (8) are both provided with a slot for engaging with the magnetic plate (29).

5. The skin pulling device for emergency surgery according to claim 1, characterized in that: A first worm (30) is fixedly mounted on the output shaft end of the first motor (9), a first gear (31) is mounted on the top of the winding roller (10), the first worm (30) is transmission-connected to the first gear (31), a second gear (32) is mounted on the corner block (14), a second motor (33) is mounted on the regulating arm (12), and a second worm (34) transmission-connected to the second gear (32) is fixedly mounted on the output shaft end of the second motor (33).

6. The skin pulling device for emergency surgery according to claim 1, characterized in that: The adhesive tape (20) comprises a flexible base layer and an adhesive layer connected in sequence from the outside to the inside, the flexible base layer is connected to the buffer bag (19) through a hot pressing process, the flexible base layer is made of silicone rubber, the thickness of the flexible base layer is 0.2 mm to 0.5 mm, the adhesive layer is a heat-activated pressure-sensitive adhesive, the thickness of the adhesive layer is 0.05 mm to 0.15 mm, and the peel strength attenuation rate of the adhesive layer within 40° C. to 60° C. is ≥50%.

7. The skin pulling device for emergency surgery according to claim 1, characterized in that: The traction wire (11) is composed of ultra-high molecular weight polyethylene fiber and nickel-titanium alloy wire spirally wound, the diameter of the single wire is 0.3 mm to 0.8 mm, and the outer diameter of the traction wire (11) is 1.2±0.1 mm.

8. The skin pulling device for emergency surgery according to claim 1, characterized in that: The negative pressure locking mechanism comprises a negative pressure suction cup (37) slidably connected to the negative pressure tube (8), a negative pressure pump (38) is installed on the negative pressure tube (8), a negative pressure port of the negative pressure pump (38) is connected to the negative pressure tube (8), and a limit spring (39) is installed between the negative pressure tube (8) and the negative pressure suction cup (37).

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