Venipuncture auxiliary device based on visualization technology

Abstract

The invention relates to the technical field of medical assistance, in particular to a venipuncture assisting device based on a visualization technology, which comprises a base, fixing pieces are arranged on both sides of the base, adjusting assemblies are arranged at the joints of the two fixing pieces and the base, a binding assembly is arranged in the middle between the two fixing pieces, and an air bag assembly is arranged on the binding assembly. The fixing piece on one side is fixedly connected with an infrared blood vessel imager, the infrared blood vessel imager is in signal connection with a control system, the fixing piece on the other side is provided with a projector, the air bag assembly comprises symmetrical first air bags, the inner sides of the two fixing pieces are fixedly connected with a plurality of second air bags, and the second air bags on the same side are located at the two ends respectively. By means of the design of the air bag system and the utilization of the characteristic of air flow, the dynamic constraint adjustment in the puncture process is achieved while the puncture constraint comfort of a patient is improved, and the puncture accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the field of medical auxiliary technology, and in particular to a venipuncture auxiliary device based on visualization technology. Background Art

[0002] In medical practice, venipuncture, a fundamental nursing skill, faces numerous challenges. These challenges include the patient's small veins, fat coverage, and dehydrated skin, making them difficult to discern with the naked eye and increasing the difficulty and risk of puncture. Consequently, advancements in medical technology have led to the emergence of visualization technologies that leverage the human body's ability to penetrate and absorb specific wavelengths of light. These technologies, through projection technology, intuitively display blood vessel images on the skin's surface. This allows operators to bypass traditional tactile and limited visual reliance in favor of more precise visual positioning, improving the success rate of venipuncture.

[0003] In existing practical applications, projection-type infrared vascular imaging technology is often used to assist medical staff in directly observing the patient's vascular image during venipuncture. However, due to the different skin conditions of different patients, the use of projection-type imaging technology alone for puncture assistance can easily lead to unclear or inaccurate display of blood vessels, thereby reducing the accuracy of the puncture. Especially when facing small or inconspicuous blood vessels, the puncture success rate may be affected. In addition, the degree of patient cooperation is also a key factor affecting the puncture effect. Tension, anxiety, or body movement may interfere with the imaging quality and puncture operation, reducing the success rate. Especially for patients such as children or the elderly, their own factors make it difficult to maintain a stable blood vessel position relative to the visualization device, further limiting the convenient application of visualization technology in venipuncture.

[0004] Therefore, it is necessary to design a venipuncture assist device based on visualization technology to reduce the limitations of assisted imaging and the interference of patient body movement on imaging and puncture, improve imaging quality and puncture success rate, increase patient comfort during puncture, and improve puncture accuracy. Summary of the Invention

[0005] To solve the above problems, the present invention provides a venous puncture assist device based on visualization technology. Through the design of the airbag system and the characteristics of gas flow, it improves the patient's puncture restraint comfort while realizing dynamic restraint adjustment during the puncture process, thereby improving the accuracy of puncture.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a visualization-based venipuncture assist device comprising a base, arc-shaped fixing plates provided on both sides of the base, an adjustment assembly for elastically adjusting the distance between the fixing plates provided at the connection between the two fixing plates and the base, a restraining assembly for restraining the patient's puncture site provided in the middle between the two fixing plates, and an airbag assembly provided on the restraining assembly; A first arm is fixedly connected to one side of the fixing plate, and a ring-shaped infrared vascular imager is fixedly connected to the top of the first arm. The infrared vascular imager is signal-connected to a control system that combines data on vascular light absorption characteristics and skin surface deformation to form a three-dimensional vascular image using planar vascular images at different depths. A second arm is provided on the other side of the fixing plate, and a projector is detachably connected to the top of the second arm. The airbag assembly includes a symmetrical first airbag and a pump air assembly. The pump air assembly is connected to the first airbag. Several second airbags are fixedly connected to the inner sides of the two fixing plates. The several second airbags on the same side are respectively located at the two ends of the corresponding first airbags, and the several second airbags on the same side are all connected to the first airbags on the same side.

[0007] The technical principles of this solution are as follows: the patient places the area to be punctured on the base. The adjustment assembly adjusts the spacing between the fixed plates to suit the patient's body shape. The restraint assembly is activated, and the inflation level of the airbag assembly is adjusted as needed. The infrared vascular imager is activated, and the control system enhances image clarity to locate the optimal puncture point. A projector further confirms the location and structure of the blood vessel, providing more detailed information about the vessel and surrounding tissue. Guided by visualization technology, medical staff perform venipuncture.

[0008] The above scheme has the following beneficial effects: This approach can capture the three-dimensional structural information of blood vessels. By combining infrared imaging technology with the light absorption characteristics of blood vessels, it can clearly capture the morphology of blood vessels at different depths. Furthermore, data on skin surface deformation can be used to further refine and improve the three-dimensional vascular model, resulting in more accurate and realistic vascular structural information. This method for generating three-dimensional vascular images provides strong support for medical research and clinical diagnosis, helping doctors better understand a patient's vascular condition and providing an important basis for developing treatment plans.

[0009] 2. In this solution, the design of the first and second airbags allows the inflated airbags to fit tightly against the patient's skin, providing a restraining force and preventing displacement of the puncture site during the puncture process. Furthermore, while the airbags provide a restraining force, their soft, compressible nature also provides the patient with a certain amount of room for movement, ensuring both puncture accuracy and increased patient comfort during the restraint process. Furthermore, the degree of inflation of the airbags can be flexibly adjusted based on the patient's specific condition. For patients of different body shapes and age groups, medical staff can adjust the airbag inflation volume to ensure optimal restraint and comfort.

[0010] 3. When the patient inevitably struggles, if the puncture site moves significantly, both the puncture process and the visual detection of the blood vessels will be affected. The first airbag and the second airbag are connected. When the surface of the second airbag is pressurized, that is, when the patient struggles, the gas in the second airbag will be filled into the first airbag on that side, increasing the expansion degree of the first airbag and increasing the restraint force on the patient's part to be tested, thereby achieving the effect of dynamically adjusting the restraint force on the part to be tested according to the patient's limb movement.

[0011] 4. In this solution, the adjustable assembly allows medical staff to easily adjust the distance between the two fixed plates to accommodate patients of varying body shapes. Furthermore, the projector at the top of the second arm features a detachable connection, making it easy for medical staff to replace or upgrade it when needed. Furthermore, the integrated design of the infrared vascular imager and projector reduces the number of steps and time required for medical staff during operation, improving work efficiency.

[0012] Furthermore, the adjustment assembly includes several adjustment cavities symmetrically opened on both sides of the base, and a connecting rod is provided in each adjustment cavity. One end of the connecting rod is fixedly connected to the inner wall of the adjustment cavity, and the other end of the connecting rod extends outside the adjustment cavity and is fixedly connected to the bottom end of the fixed plate. A spring in a stretched state is provided in the adjustment cavity, and the two ends of the spring are respectively fixedly connected to the connecting rod and the inner wall of the adjustment cavity.

[0013] Beneficial effects: By adjusting the components, medical staff can flexibly adjust the distance between the two fixing plates according to the patient's specific body shape and comfort requirements, ensuring that the device can fit the patient's body tightly, improving the accuracy of puncture and the patient's comfort, and making the device suitable for patients of different body shapes and ages, from children to adults, who can find a suitable fixed position.

[0014] Furthermore, the restraint assembly includes symmetrical reinforcement blocks, which are fixedly connected to the side walls of the two reinforcement plates on both sides close to each other, and reinforcement grooves are provided on the sides of the two reinforcement blocks close to each other. The first airbags are fixedly connected to the corresponding reinforcement grooves, and the reinforcement blocks are respectively provided with upper and lower connecting belts at the top and bottom ends, and the upper and lower connecting belts are respectively fixedly connected to the reinforcement blocks and the fixing plates at both ends, and the upper and lower connecting belts connect each reinforcement block to the reinforcement block on the opposite side.

[0015] Beneficial Effects: The design of the reinforcement blocks and grooves provides more stable support for the first airbag. The first airbag is securely attached to the grooves, effectively preventing displacement or deformation during inflation or deflation, thereby ensuring the stability and security of the restraint. Upper and lower connecting straps connect each reinforcement block to the opposite reinforcement block, forming a single, integrated restraint structure. This further enhances the overall stability and security of the restraint assembly, ensuring a secure restraint even if the patient moves or struggles.

[0016] Furthermore, a plurality of connecting grooves are provided in the base, and the connecting grooves are all connected to symmetrical connecting ports, and the connecting ports are all provided on the top surface of the base. The lower connecting belts are all located in the connecting grooves and are fixedly connected to the reinforcement block through the connecting ports.

[0017] Beneficial Effects: The design of the connecting slot and port allows the lower connecting strap to be securely connected to the reinforcement block and base. This structural connection not only enhances the stability of the restraint assembly but also ensures the integrity and stability of the entire device even when the patient moves or struggles. By concealing the lower connecting strap within the connecting slot, external interference with the strap is reduced, further improving the stability and reliability of the structure.

[0018] Furthermore, a displacement groove is provided at the connection between the second arm and the corresponding fixed plate. The displacement groove is provided on the outer wall of the fixed plate. A displacement block is slidably connected in the displacement groove. The displacement block is fixedly connected to the bottom end of the second arm. A driving component is provided in the displacement groove for driving and adjusting the movement of the synchronized puncture needle.

[0019] Beneficial Effects: The design of the displacement slot and displacement block enables flexible displacement adjustment of the second arm within a certain range. This adjustment can be customized based on the patient's body shape, vascular location, and the medical staff's operating habits, thereby improving puncture accuracy and flexibility and facilitating subsequent projector tracking of the puncture. The introduction of a drive assembly further enhances the synchronization and accuracy of this adjustment. Driven by the drive assembly, the puncture needle maintains synchronization with the projector image during movement, thereby improving the success rate of puncture.

[0020] Furthermore, the drive assembly includes a servo motor fixedly connected to the inner wall of one side of the displacement slot, the servo motor is connected to the control system signal, the servo motor output shaft is fixedly connected to a threaded rod, the threaded rod is rotated away from one end of the servo motor and connected to the inner wall of the other side of the displacement slot, and the displacement block is threadedly connected to the threaded rod.

[0021] Beneficial Effects: The servo motor has high-precision and high-reliability control characteristics. Through signal connection with the control system, it can achieve precise control of the displacement block within the displacement slot. This precise control ensures the stability and accuracy of the puncture needle during movement, thereby improving the success rate of puncture.

[0022] Furthermore, a pressurized chamber is provided in the reinforcement block near the side of the second arm. The pressurized chamber is located on the side of the displacement groove away from the servo motor. A push rod is fixedly connected to the side of the displacement block away from the servo motor. The end of the push rod away from the displacement block passes through the side wall of the displacement groove and extends to the pressurized chamber where a piston is fixedly connected. A sealing ring is provided on the inner wall of the pressurized chamber at the point where the push rod passes through. The pressurized chamber on the side of the piston away from the push rod is connected to the first airbag on the corresponding side.

[0023] Beneficial effects: The threaded rod is driven to rotate by a servo motor, and the displacement block moves in the displacement groove accordingly, and the push rod and the piston move in the pressurized chamber accordingly, so that the inflation pressure of the first airbag can be precisely adjusted by controlling the rotation of the servo motor. To this end, medical staff can input corresponding instructions through the control system according to the patient's body shape, blood vessel depth and puncture requirements, and the servo motor can automatically adjust the position of the displacement block, thereby changing the inflation pressure of the first airbag.

[0024] Furthermore, the second arm is provided with a CMOS sensor for real-time acquisition of blood vessel light absorption characteristics and skin surface deformation, and the CMOS sensor is connected to the control system signal.

[0025] Beneficial effects: The CMOS sensor can capture subtle changes in the patient's skin surface and the blood vessels' absorption characteristics of light of different wavelengths in real time, providing accurate data support for the control system. The control system uses this data, combined with advanced image processing algorithms, to quickly generate clear and accurate three-dimensional blood vessel images, providing medical staff with intuitive visual guidance. During the puncture process, medical staff can fine-tune the puncture position and angle based on the real-time feedback from the CMOS sensor to ensure that the puncture needle can accurately enter the blood vessel, further improving the success rate and safety of the puncture.

[0026] Furthermore, a third arm is fixedly connected to a side wall of one side of the fixing plate, and a display component for displaying blood vessel imaging is hinged on the top end of the third arm, and the display component is connected to the control system signal.

[0027] Beneficial effects: The display component can display vascular imaging in real time, providing medical staff with intuitive visual guidance, helping them to locate blood vessels more accurately, reducing the possibility of mispuncture and repeated puncture, and thus improving the accuracy and success rate of puncture.

[0028] Furthermore, the control system includes an infrared-structured light fusion imaging module, a positioning drive module and an image display module; The infrared-structured light fusion imaging module includes a fringe projection unit, a dual-band image acquisition unit, a blood vessel depth inversion unit, and a three-dimensional reconstruction unit; An encrypted fringe projection unit is used to emit an infrared light field through an infrared vascular imager, combine the curvature feedback of the target puncture area to generate a dynamic fringe signal for displaying the morphology and position of the patient's blood vessels, and transmit the fringe signal to the projector for display; A dual-band image acquisition unit is used to acquire absorption images and distorted fringe images using a CMOS sensor. This acquisition process is synchronized with the vascular morphology projection and calculates a dual-band RAW data stream. The blood vessel depth inversion unit is used to calculate the light intensity attenuation ratio of the received detection infrared light, calculate the absorbance based on the data, and calculate the distribution map of the blood vessel depth in combination with the epidermal thickness of the patient's area to be punctured; A three-dimensional reconstruction unit is used to analyze the phase data of the distorted fringe in combination with the distorted fringe image, and calculate the three-dimensional point cloud of the skin surface in combination with the curvature radius formula; The positioning drive module includes a needle tip acquisition unit and a drive unit; A needle tip acquisition unit is used to acquire needle tip coordinate data, which is presented as three-dimensional coordinate data; a drive unit, configured to extract coordinate changes along the stator from the needle tip position data, generate a drive signal for the servo motor according to the coordinate changes, and transmit the drive signal to the servo motor; The image display module includes an image display unit; The image display unit is used to receive the three-dimensional point cloud of the skin surface generated by the three-dimensional reconstruction unit, collect the blood vessel diameter, combine the blood vessel diameter, the three-dimensional point cloud of the skin surface and the blood vessel depth distribution map to generate a three-dimensional image of the blood vessels, and transmit the three-dimensional image of the blood vessels to the display component for display.

[0029] Beneficial Effects: This design makes the entire puncture process more intelligent and automated. With simple operations, medical staff can obtain clear and accurate 3D images of blood vessels and make fine adjustments based on real-time feedback, significantly improving puncture efficiency and safety. Furthermore, the system is highly flexible and adaptable, allowing for personalized adjustments based on individual patient conditions to ensure puncture accuracy and patient comfort. This provides medical staff with an efficient, accurate, and safe puncture solution with significant clinical value.

[0030] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a venipuncture assisting device based on visualization technology of the present invention; Figure 2 An axonometric cross-sectional view of the arrangement of the displacement slots in an embodiment of the venipuncture assisting device based on visualization technology of the present invention; Figure 3 A front cross-sectional view of the regulating cavity in an embodiment of the venipuncture assisting device based on visualization technology of the present invention; Figure 4 A front cross-sectional view of a connecting groove in an embodiment of the venipuncture assisting device based on visualization technology of the present invention; Figure 5This is a schematic diagram of the operation of a control system of an embodiment of a venipuncture assisting device based on visualization technology of the present invention.

[0032] The figure marks in the drawings of the specification include: 1. base; 2. fixing plate; 3. first arm; 4. infrared vascular imager; 5. second arm; 6. projector; 7. first airbag; 8. second airbag; 9. adjustment chamber; 10. connecting rod; 11. spring; 12. reinforcement block; 13. reinforcement groove; 14. upper connecting belt; 15. lower connecting belt; 16. connecting through groove; 17. connecting port; 18. displacement groove; 19. displacement block; 20. servo motor; 21. threaded rod; 22. pressurization chamber; 23. push rod; 24. third arm; 25. display assembly. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0036] The following is further described in detail through specific implementation methods: Example 1

[0037] As attached Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown: A venipuncture assisting device based on visualization technology includes a base 1, both sides of the base 1 are provided with an arc-shaped fixing plate 2, both side walls of the base 1 are provided with an adjustment cavity 9, and the adjustment cavity 9 is provided with a connecting rod 10, one end of the connecting rod 10 is welded to the inner wall of the adjustment cavity 9, and the other end of the connecting rod 10 extends to the outside of the adjustment cavity 9 and is welded to the bottom end of the fixing plate 2, and the adjustment cavity 9 is provided with a spring 11 in a stretched state, and both ends of the spring 11 are welded to the connecting rod 10 and the inner wall of the adjustment cavity 9 respectively. When using the venipuncture assisting device, the doctor The nurse first adjusts the position of the fixing plate 2 according to the patient's body shape and needs. Since the spring 11 is in a stretched state, the fixing plate 2 will be automatically pulled toward the base 1 through the connecting rod 10 under the tensile traction of the spring 11, thereby fitting and fixing the patient's puncture site, simplifying the operation process of adjusting the restraint width for different patients before puncture. The medical staff only needs to put the patient's puncture site between the two fixing plates 2, and then the elastic displacement of the fixing plate 2 automatically adapts to the width of the patient's puncture site, thereby improving the efficiency and accuracy of fixation.

[0038] Specific as Figure 4 As shown, a number of connecting slots 16 are provided in the base 1, and the connecting slots 16 are all connected to symmetrical connecting ports 17. The connecting ports 17 are all provided on the top surface of the base 1, and the two fixing plates 2 are close to each other and are provided with symmetrical reinforcement blocks 12 in the middle of one side. The top of the reinforcement block 12 is fixedly connected to the upper connecting belt 14 by screws, and the upper connecting belt 14 is fixedly connected to the fixing plate 2 by screws at one end away from the reinforcement block 12. The bottom end of the reinforcement block 12 is fixedly connected to the lower connecting belt 15 by screws, and the lower connecting belt 15 extends through the corresponding connecting slots 16 and is fixed to the fixing plate 2 by screws. Through the design of the connecting slots 16, the position of the lower connecting belt 15 is limited to be located in the connecting slots 16, which helps to accurately limit the patient's puncture site to be accurately limited to the surface of the base 1, and can also improve the accuracy of visual detection and the efficiency of subsequent imaging, and can also ensure good contact between the patient's skin and the base 1, thereby reducing errors and interference. In addition, the design of the upper connecting strap 14, the lower connecting strap 15 and the reinforcement block 12 can restrain the patient's puncture site, and by adjusting the length of the upper connecting strap 14 and the lower connecting strap 15, it can adapt to the width of different puncture sites of different patients, thereby improving the universality of the device.

[0039] A first arm 3 is welded to the top of one side of the fixing plate 2, near the reinforcement block 12. The end of the first arm 3, away from the reinforcement block 12, is bolted to an infrared vascular imager 4. This infrared vascular imager 4 is signal-connected to a control system that combines data from vascular light absorption characteristics and skin surface deformation to create a three-dimensional vascular image using planar vascular images at different depths. A second arm 5 is mounted on the outside of the other side of the fixing plate 2. The end of the second arm 5, away from the fixing plate 2, is removably connected to a projector 6 via a snap-fit mechanism. Projector 6 is signal-connected to the control system. The combined design of the infrared vascular imager 4 and projector 6 enables a comprehensive, three-dimensional display of the patient's blood vessels, improving vascular visibility and helping medical staff more accurately determine the depth and angle of puncture, thereby significantly improving puncture accuracy. During the puncture process, medical staff use infrared imaging to observe and select the desired vascular location, i.e., the transverse position of the vascular insertion point. After puncturing the skin, they observe the needle's penetration using the cross-sectional image of the blood vessel captured by the projector 6 to control the puncture depth and angle.

[0040] However, since the conventional projection-type infrared vascular imaging technology only displays a single-depth vascular plane for medical staff to judge the location of the vascular, it is difficult to accurately display the depth of the patient's blood vessels, making it difficult for medical staff to complete accurate puncture. Therefore, the second arm (5) is also designed to be equipped with a CMOS sensor for real-time acquisition of vascular absorption characteristics and skin surface deformation. The CMOS sensor is connected to the control system signal. This design can obtain richer vascular information; specifically, the CMOS sensor can capture the absorption of different wavelengths of light by the blood vessels. This absorption characteristic is closely related to factors such as the depth, diameter and blood flow rate of the blood vessels. Through comprehensive analysis of this information, the control system processes and generates a three-dimensional vascular image, thereby further improving the accuracy and safety of puncture, reducing the probability of repeated punctures for patients, and bringing great convenience to medical work.

[0041] To increase the detection range of the infrared vascular imager 4, a displacement slot 18 is designed on the outer side of the fixing plate 2 near the second arm 5. A servo motor 20 is fixedly connected to the inner side wall of the displacement slot 18 via screws. The servo motor 20 is connected to the control system signal. The servo motor 20 has the characteristics of high precision and high response speed. By driving the infrared vascular imager 4 to follow the movement of the puncture needle, the infrared vascular imager 4 can be ensured to always be in the optimal detection position, thereby greatly improving the accuracy of detection. The output shaft of the servo motor 20 is fixedly connected to a threaded rod 21 through a coupling. The end of the threaded rod 21 away from the servo motor 20 is rotatably connected to the inner wall of the other side of the displacement groove 18 through a bearing. A displacement block 19 with a corresponding displacement shape is sleeved on the surface of the threaded rod 21. The displacement block 19 is threadedly matched with the threaded rod 21. The displacement block 19 is fixedly connected to the bottom end of the second arm 5 by a bolt. The image detected by the infrared vascular imager 4 is combined with the analysis and judgment of the puncture needle position by the control system to control the servo motor 20 according to the movement of the puncture needle. The infrared vascular imager 4 can move along with the puncture needle to improve the accuracy of the detection.

[0042] During puncture, patients may experience uncontrolled movements or emotions, which may cause the puncture site to shift. To address this issue, the present invention features two reinforcement blocks 12 with reinforcement grooves 13 on each side, each of which is adhered and fixed with a first airbag 7. An air pump assembly is provided on one side of the base 1 and placed on the ground. The air pump assembly is preferably a signal air pump connected to a control system signal, enabling the inflation process of the first airbags 7 to be initiated with one click, simplifying the preparatory work before puncture and improving the efficiency of venipuncture. The inflated first airbags 7 can fit tightly against the patient's skin, providing sufficient restraint to prevent the puncture site from shifting during the puncture process. Although the primary function of the first airbags 7 is to provide restraint, their soft and compressible properties also provide the patient with a certain amount of room for movement. This design ensures the accuracy of the puncture and improves the patient's comfort during the restraint process. Moreover, the inflation degree of the first airbag 7 can be flexibly adjusted according to the specific condition of the patient. For patients of different body shapes and age groups, medical staff can ensure the best restraint effect and comfort by adjusting the inflation volume of the first airbag 7.

[0043] When the patient inevitably struggles or engages in other activities, if the puncture site moves significantly, both the advancement of the puncture needle and the visualization of the blood vessels will be affected. Figure 1 and Figure 3 As shown, the inner side of the reinforcing plate 2 is designed to be provided with several symmetrical second airbags 8, and the second airbags 8 on both sides are respectively located at the two ends of the first airbag 7, and the second airbags 8 are connected to the first airbag 7 through the trachea. That is, when the patient breaks free, since the restraint force of the part to be punctured is greater than the restraint force of other parts, other parts, that is, the limbs on both sides of the part to be punctured will move first, thereby exerting force on the surface of a second airbag 8, so that the gas in the second airbag 8 is filled into the first airbag 7 on this side, increasing the expansion degree of the first airbag 7, and improving the restraint force on the part to be measured of the patient, thereby achieving the effect of dynamically adjusting the restraint force on the part to be measured according to the patient's breaking free movement. Example 2

[0044] As attached Figure 2 As shown, the difference from Example 1 is that, due to the patient's fear of pain, the patient's resistance will increase as the puncture needle goes deeper, and the intention to break free will increase. For this reason, a pressure chamber 22 is also provided in the reinforcement block 12 near the side of the second arm 5. The pressure chamber 22 is located on the side of the displacement groove 18 away from the servo motor 20. A push rod 23 is welded on the side of the displacement block 19 away from the servo motor 20. The end of the push rod 23 away from the displacement block 19 passes through the side wall of the displacement groove 18 and extends to the pressure chamber 22 where a piston is welded. The inner wall of the pressure chamber 22 A sealing ring is provided at the point where the push rod 23 passes through. The pressurized chamber 22 on the side of the piston away from the push rod 23 is connected to the first airbag 7 on the corresponding side through the trachea. That is, as the puncture needle goes deeper, the displacement block 19 moves along the threaded rod 21 following the penetration of the puncture needle. At this time, the push rod 23 pushes the piston forward, so that the positive pressure generated in the pressurized chamber 22 due to the movement of the piston rushes the gas into the first airbag 7 on this side, thereby enhancing the overall restraint force of the first airbag 7 on the patient, showing an effect of enhanced restraint on the patient's puncture site as the puncture needle goes deeper. Example 3

[0045] As attached Figure 1 As shown, the difference from Example 2 is that the second arm 5 is provided with an electric angle adjustment component for adjusting the angle and position of the projector 6, and the electric angle adjustment component includes a plurality of electric telescopic rods, which are hinged at a plurality of hinge points of the second arm 5. The electric telescopic rods are all connected to the control system signal. Through the coordinated work of multiple electric telescopic rods, fine adjustment of the angle and position of the projector 6 can be achieved. The electric telescopic rod of each hinge point can be independently extended and retracted under the command of the control system, thereby adjusting the specific position and tilt angle of the probe, so that the probe can flexibly adapt to the body shape and blood vessel position of different patients, ensuring the best imaging effect. Example 4

[0046] As attached Figure 1 As shown, the difference from Example 3 is that a third arm 24 is fixedly connected to the side wall of one side of the fixing plate 2. The top of the third arm 24 is hingedly connected to a display assembly 25 for displaying vascular imaging. Display assembly 25 includes a touch screen, which is hinged to the top of the third arm 24 and connected to the control system signal. The touch screen can display vascular imaging in real time, providing intuitive visual feedback to medical staff. Through the touch function, medical staff can directly operate on the screen, such as selecting puncture points and adjusting image parameters, enhancing the interactivity and intuitiveness of the operation. Example 5

[0047] As attached Figure 5As shown, the difference from Example 4 is that the control system includes an infrared-structured light fusion imaging module, a positioning drive module and an image display module.

[0048] The infrared-structured light fusion imaging module consists of a fringe projection unit, a dual-band image acquisition unit, a blood vessel depth inversion unit, and a three-dimensional reconstruction unit; The fringe projection unit has an encryption function. It emits an infrared light field through the infrared vascular imager 4, combines the curvature feedback of the target puncture area, and generates dynamic fringe signals for displaying the morphology and position of the patient's blood vessels. These fringe signals are then transmitted to the projector 6 for display. The dual-band image acquisition unit uses a CMOS sensor to collect absorption images and distorted fringe images. This acquisition process is synchronized with the vascular morphology projection to calculate a dual-band RAW data stream. The vascular depth inversion unit is responsible for calculating the intensity attenuation ratio of the received infrared light. Based on the data and the real-time dual-band RAW data stream, it calculates the vascular absorbance and, combined with the epidermal thickness of the patient's puncture area, calculates the distribution map of the vascular depth. The function of the three-dimensional reconstruction unit is to analyze the phase data of the distorted fringe in combination with the distorted fringe image and calculate the three-dimensional point cloud of the skin surface using the curvature radius formula.

[0049] Through the coordinated work of the fringe projection unit, dual-band image acquisition unit, vascular depth inversion unit and three-dimensional reconstruction unit, the three-dimensional morphology and position information of the patient's blood vessels can be acquired in real time and accurately, thereby improving the accuracy of puncture and significantly reducing the risk of complications caused by accidental puncture or damage to surrounding important tissues. In particular, the encryption function of the fringe projection unit ensures the privacy and security of patient information and enhances the safety of medical operations.

[0050] The positioning drive module consists of a needle tip acquisition unit and a drive unit; The function of the needle tip acquisition unit is to collect needle tip coordinate data, which are presented in the form of three-dimensional coordinate data; The driving unit is responsible for extracting the coordinate changes along the fixed plate from the needle tip position data, generating a driving signal for the servo motor 20 according to these coordinate changes, and transmitting the driving signal to the servo motor 20; The image display module includes an image display unit; The function of the image display unit is to receive the three-dimensional point cloud of the skin surface generated by the three-dimensional reconstruction unit, collect the blood vessel diameter, combine the blood vessel diameter, the three-dimensional point cloud of the skin surface and the blood vessel depth distribution map to generate a three-dimensional image of the blood vessel, and transmit the three-dimensional image of the blood vessel to the touch screen for display.

[0051] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A venipuncture assisting device based on visualization technology, comprising a base (1), wherein both sides of the base (1) are provided with arc-shaped fixing plates (2), characterized in that: An adjustment component for elastically adjusting the distance between the two fixing plates (2) is provided at the connection between the two fixing plates (2) and the base (1); a restraining component for restraining the patient's puncture site is provided in the middle between the two fixing plates (2); and an airbag component is provided on the restraining component; A first arm (3) is fixedly connected to the fixing plate (2) on one side, an infrared blood vessel imager (4) having a ring structure is fixedly connected to the top of the first arm (3), and the infrared blood vessel imager (4) is signal-connected to a control system for combining data on blood vessel absorption characteristics and skin surface deformation to form a three-dimensional blood vessel image by splicing planar blood vessel images at different depths. A second arm (5) is provided on the fixing plate (2) on the other side, and a projector (6) is detachably connected to the top of the second arm (5); The airbag assembly includes a symmetrical first airbag (7) and an air pump assembly, the air pump assembly is connected to the first airbag, and a plurality of second airbags (8) are fixedly connected to the inner sides of the two fixing plates (2). The plurality of second airbags (8) on the same side are respectively located at the two ends of the corresponding first airbag (7), and the plurality of second airbags (8) on the same side are all connected to the first airbag (7) on the same side.

2. The venipuncture assisting device based on visualization technology according to claim 1, characterized in that: The adjustment assembly includes a plurality of adjustment cavities (9) symmetrically opened on both sides of the base (1), each of the adjustment cavities (9) is provided with a connecting rod (10), one end of the connecting rod (10) is fixedly connected to the inner wall of the adjustment cavity (9), and the other end of the connecting rod (10) extends outside the adjustment cavity (9) and is fixedly connected to the bottom end of the fixing plate (2), and each of the adjustment cavities (9) is provided with a spring (11) in a tension state, and the two ends of the spring (11) are fixedly connected to the connecting rod (10) and the inner wall of the adjustment cavity (9), respectively.

3. The venipuncture assisting device based on visualization technology according to claim 2, characterized in that: The restraint assembly includes symmetrical reinforcement blocks (12), the reinforcement blocks (12) are respectively fixedly connected to the side walls of the two reinforcement plates (2) on the side close to each other, the two reinforcement blocks (12) are each provided with a reinforcement groove (13) on the side close to each other, the first airbag (7) is respectively fixedly connected in the corresponding reinforcement groove (13), the reinforcement blocks (12) are respectively provided with an upper connecting belt (14) and a lower connecting belt (15) at the top and bottom ends, the upper connecting belt (14) and the lower connecting belt (15) are respectively fixedly connected to the reinforcement block (12) and the fixing plate (2) at both ends, and the upper connecting belt (14) and the lower connecting belt (15) connect each reinforcement block (12) to the reinforcement block (12) on the opposite side.

4. The venipuncture assisting device based on visualization technology according to claim 3, characterized in that: A plurality of connecting grooves (16) are provided in the base (1), and the connecting grooves (16) are all connected to symmetrical connecting ports (17). The connecting ports (17) are all provided on the top surface of the base (1), and the lower connecting belts (15) are all located in the connecting grooves (16) and are fixedly connected to the reinforcement block (12) through the connecting ports (17).

5. The venipuncture assisting device based on visualization technology according to claim 4, characterized in that: A displacement groove (18) is provided at the connection between the second arm (5) and the corresponding fixed plate (2). The displacement groove (18) is provided on the outer wall of the fixed plate (2). A displacement block (19) is slidably connected in the displacement groove (18). The displacement block (19) is fixedly connected to the bottom end of the second arm (5). A driving component for driving and adjusting the movement of the synchronous puncture needle is provided in the displacement groove (18).

6. The venipuncture assisting device based on visualization technology according to claim 5, characterized in that: The driving assembly includes a servo motor (20) fixedly connected to the inner wall of one side of the displacement slot (18), the servo motor (20) is connected to the control system signal, the output shaft of the servo motor (20) is fixedly connected to a threaded rod (21), one end of the threaded rod (21) away from the servo motor (20) is rotatably connected to the inner wall of the other side of the displacement slot (18), and the displacement block (19) is threadedly connected to the threaded rod (21).

7. The venipuncture assisting device based on visualization technology according to claim 6, characterized in that: A pressurizing chamber (22) is further provided in the reinforcing block (12) on the side close to the second arm (5). The pressurizing chamber (22) is located on the side of the displacement groove (18) away from the servo motor (20). A push rod (23) is fixedly connected to the side of the displacement block (19) away from the servo motor (20). One end of the push rod (23) away from the displacement block (19) penetrates the side wall of the displacement groove (18) and extends to the pressurizing chamber (22) where a piston is fixedly connected. A sealing ring is provided on the inner wall of the pressurizing chamber (22) at the position where the push rod (23) penetrates. The pressurizing chamber (22) on the side of the piston away from the push rod (23) is connected to the first airbag (7) on the corresponding side.

8. The venipuncture assisting device based on visualization technology according to claim 7, characterized in that: The second arm (5) is also provided with a CMOS sensor for real-time acquisition of blood vessel light absorption characteristics and skin surface deformation, and the CMOS sensor is connected to the control system signal.

9. The venipuncture assisting device based on visualization technology according to claim 8, characterized in that: A third arm (24) is fixedly connected to the side wall of the fixing plate (2) on either side. A display component (25) for displaying vascular imaging is hingedly connected to the top end of the third arm (24). The display component (25) is connected to a control system signal.

10. The venipuncture assisting device based on visualization technology according to claim 9, characterized in that: The control system includes an infrared-structured light fusion imaging module, a positioning drive module, and an image display module; The infrared-structured light fusion imaging module includes a fringe projection unit, a dual-band image acquisition unit, a blood vessel depth inversion unit, and a three-dimensional reconstruction unit; An encrypted fringe projection unit is used to emit an infrared light field through an infrared blood vessel imager (4), generate a dynamic fringe signal for displaying the morphology and position of the patient's blood vessels in combination with curvature feedback of the target puncture area, and transmit the fringe signal to a projector (6) for display; A dual-band image acquisition unit is used to acquire absorption images and distorted fringe images using a CMOS sensor. This acquisition process is synchronized with the vascular morphology projection and calculates a dual-band RAW data stream. The blood vessel depth inversion unit is used to calculate the light intensity attenuation ratio of the received detection infrared light, calculate the absorbance based on the data, and calculate the distribution map of the blood vessel depth in combination with the epidermal thickness of the patient's area to be punctured; A three-dimensional reconstruction unit is used to analyze the phase data of the distorted fringe in combination with the distorted fringe image, and calculate the three-dimensional point cloud of the skin surface in combination with the curvature radius formula; The positioning drive module includes a needle tip acquisition unit and a drive unit; A needle tip acquisition unit is used to acquire needle tip coordinate data, which is presented as three-dimensional coordinate data; A driving unit for extracting coordinate changes along the fixed plate from the needle tip position data, generating a driving signal for the servo motor (20) according to the coordinate changes, and transmitting the driving signal to the servo motor (20); The image display module includes an image display unit; The image display unit is used to receive the three-dimensional point cloud of the skin surface generated by the three-dimensional reconstruction unit, collect the blood vessel diameter, combine the blood vessel diameter, the three-dimensional point cloud of the skin surface and the blood vessel depth distribution map to generate a three-dimensional image of the blood vessel, and transmit the three-dimensional image of the blood vessel to the display component (25) for display.

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