A medicine injection positioning and puncture device for thyroid surgery

Abstract

The application relates to the technical field of puncture equipment, and discloses a medicine injection positioning puncture device for thyroid surgery, which comprises an injection cylinder, the inside of the injection cylinder is filled with liquid medicine required for thyroid surgery; a puncture needle rod, the puncture needle rod is sequentially composed of a head part, an adjustable flexible part and a transparent needle head part from top to bottom, the inside of the puncture needle rod is provided with a medicine injection flow channel for liquid medicine flow during medicine injection, and the top of the puncture needle rod is provided with a connecting end seat. By increasing and arranging the precise medicine injection mechanism, when the puncture medicine injection is performed on the thyroid surgery patient, the mechanism can realize the precise control of the medicine injection pressure on the one hand by means of the real-time monitoring of the liquid medicine pressure in the medicine injection channel through the micro pressure sensor, the linkage control of the data analysis of the display analyzer and the electronic regulating valve, effectively avoids the high-pressure medicine injection problem easily caused by manual injection, and reduces the chemical injury caused by the medicine leakage to the surrounding important tissues.

Description

Technical Field

[0001] This invention relates to the field of puncture equipment technology, specifically to a drug injection positioning puncture device for thyroid surgery. Background Technology

[0002] In the clinical treatment of thyroid surgery, puncture-injection therapy is widely used, mainly covering three core scenarios: preoperative adjuvant therapy, intraoperative operative needs, and postoperative complication management. Preoperative adjuvant therapy is an important minimally invasive intervention for benign cystic thyroid nodules. When such nodules are large and cause compressive symptoms, or when patients refuse open surgery, puncture-injection sclerotherapy becomes one of the preferred options. This treatment involves aspirating the fluid from the cyst cavity with a puncture needle and then injecting a sclerosing agent into the cavity. The sclerosing agent destroys the activity of the cyst wall epithelial cells, preventing the regeneration of cyst fluid from the root cause, ultimately achieving the therapeutic goal of nodule shrinkage and effectively relieving the patient's pressure and discomfort.

[0003] In current clinical practice, thyroid biopsy and drug administration mostly employs manual injection. This method has several inherent drawbacks, limiting treatment efficacy and safety. Firstly, manual injection makes it difficult to precisely control the injection pressure, easily leading to high-pressure injection and causing drug leakage into surrounding vital tissues such as the recurrent laryngeal nerve and parathyroid glands, resulting in chemical damage and additional harm to the patient. Secondly, manual operation cannot provide real-time monitoring of tissue tension at the puncture site, increasing the risk of over-injection and complications such as local tissue edema and bleeding, further complicating postoperative recovery.

[0004] In addition, even during drug injection with artificially controlled, constant pressure, flow rate fluctuations still occur due to the dynamic changes in resistance of the injection channel as the procedure progresses. For example, initially, when the channel is unobstructed, the drug flow rate is relatively high. However, as the injection progresses, local tissue swelling increases channel resistance, causing the flow rate to decrease abruptly. This unstable flow rate can lead to localized accumulation or uneven distribution of the drug within the target tissue, failing to ensure uniform drug delivery to the treatment area and directly impacting the therapeutic effect, making it difficult to achieve the desired clinical intervention. Therefore, those skilled in the art have proposed an injection positioning puncture device for thyroid surgery to address the aforementioned technical problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a drug injection positioning puncture device for thyroid surgery, which solves the problem of fluctuating flow rate during puncture and drug injection in thyroid patients.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a drug injection and positioning puncture device for thyroid surgery, comprising, A syringe filled with the medication required for thyroid surgery. The puncture needle rod consists of a head, an adjustable flexible part, and a transparent needle head, from top to bottom. The inside of the puncture needle rod is provided with an injection channel for the flow of drug solution during the injection process, and a connecting end seat is provided at the top of the puncture needle rod. The connecting end cap is connected to the bottom of the syringe via a drug delivery tube; The precision injection mechanism, which is installed on the syringe, is used to precisely control and adjust the hydraulic pressure of the injection fluid during thyroid surgery. A uniform speed propulsion mechanism, which is installed on the syringe, is used to propel the liquid at a uniform speed under different pressure conditions during the injection of medication into the patient by the precision drug injection mechanism. A dual-mode guiding mechanism, which is mounted on the puncture needle shaft, is used to provide dual-mode guidance during the puncture of the patient's affected area using the puncture needle shaft; The puncture adjustment mechanism, which is located on the puncture needle shaft, is used to adjust the puncture site during the puncture process at the patient's affected area.

[0007] Preferably, the precision injection mechanism includes a push rod, the syringe is provided with a push rod to push out the liquid medicine, and the delivery tube is provided with an electronic regulating valve near the syringe to control the flow rate of the liquid medicine discharged from the delivery tube.

[0008] Preferably, the precision injection mechanism further includes a miniature pressure sensor. A miniature pressure sensor is installed near the needle tip in the injection channel to monitor the internal pressure of the drug. The miniature pressure sensor is connected to an external display analyzer via a communication connection. The display analyzer receives and analyzes the pressure data transmitted by the miniature pressure sensor in real time. The analysis results are converted into control signals to control and adjust the electronic regulating valve. An audible and visual alarm is installed at the top center of the display analyzer.

[0009] Preferably, the uniform speed propulsion mechanism includes an outer plate, which is fixedly connected to the top of the outer wall of the syringe. A mounting frame is fixedly connected to the middle of the top of the outer plate. A movable seat is slidably connected to the middle of the inner side of the mounting frame, and the middle of the bottom end of the movable seat engages with the top of the push rod. T-shaped grooves are provided on the middle of both sides of the inner wall of the mounting frame, and the two ends of the movable seat extend to the positions corresponding to the T-shaped grooves.

[0010] Preferably, the uniform speed propulsion mechanism further includes lead screws. Lead screws are rotatably connected to both sides of the inner side of the mounting frame. The bottom ends of the lead screws pass through the corresponding positions of the movable seat and are connected to the corresponding positions of the top of the outer plate. Micro servo motors are provided on both sides of the bottom of the outer plate, and the output ends of the micro servo motors are connected to the bottom of the corresponding side lead screws. The two micro servo motors are controlled by a servo controller to ensure the synchronization of the drive.

[0011] Preferably, the uniform speed propulsion mechanism further includes a base, the bottom of the push rod is fixedly connected to the base, the lower part of the base is provided with a piston seat for squeezing out the liquid medicine inside the injection cylinder, the top center of the piston seat is rotatably connected to a Y-shaped frame, the two ends of the top of the Y-shaped frame are rotatably connected to elastic plates, the elastic plates are provided with offset parts, and pressure rollers are provided on one side of the inner wall of the elastic plates. The bottom two sides of the base are connected to the corresponding positions of the ends of the elastic plates through connecting rods.

[0012] Preferably, the dual-mode guiding mechanism includes an arc-shaped slot seat. An arc-shaped slot seat that is fixedly connected to the middle of the rear side of the outer plate and snaps onto the side frame of the operating table is provided. A display is provided on the rear side of the arc-shaped slot seat. A signal receiver is provided on one side of the bottom of the display. A miniature ultrasonic probe and an endoscope probe are sequentially provided on the inner wall of the drug injection channel near the needle tip. The endoscope probe is connected to one end of a transmission optical fiber. The other end of the transmission optical fiber passes through the flexible part and the end head in sequence and is connected to the signal receiver.

[0013] Preferably, the puncture adjustment mechanism includes an outer ring seat, which is provided on the outer wall of the end head. The outer ring seat has a plurality of actuating wheels arranged in a circular array, and rubber damping pads are provided on both sides of the actuating wheels.

[0014] Preferably, the puncture adjustment mechanism further includes traction wires, and multiple traction wires are arranged in a circumferential array near the edge of the top of the needle head. The top of the traction wires passes through the flexible part and the end head in sequence and is connected to the corresponding actuating wheel.

[0015] Working Principle: During a thyroid biopsy, the dual-mode guidance mechanism is activated first. Before the procedure, medical staff use CT and ultrasound images to accurately locate the target tissue at the affected area and plan the puncture path. Then, the syringe and monitor are securely fixed to the side frame of the operating table using an arc-shaped mounting bracket, ensuring stable equipment position during the procedure. Once the procedure begins, with real-time assistance from the monitor, the medical staff smoothly and accurately inserts the puncture needle into the patient's neck tissue. During this process, the miniature ultrasound probe integrated into the injection channel continuously collects the ultrasound echo signals of the tissue surrounding the needle tip and displays them on the monitor. A clear two-dimensional structural image is generated to accurately identify the location of key tissues such as the recurrent laryngeal nerve, parathyroid glands, and major blood vessels in the neck, avoiding puncture risks. Simultaneously, the endoscopic probe in the injection channel, through the synergy of the transmission fiber and the needle tip, acquires real-time optical images of the transparent area at the tip of the needle shaft, clearly showing the contact state between the needle tip and the target tissue. This image is also displayed simultaneously on the monitor. Subsequently, the two modalities of images are superimposed and fused on the monitor, forming a dual guidance system of structural localization and intuitive vision. Medical personnel adjust the needle insertion angle and depth in real time based on the fused image displayed on the monitor until the needle tip precisely reaches the preset target position. The injection procedure is then initiated to guide and locate the puncture site during the patient's surgery. Simultaneously, the puncture adjustment mechanism is activated. Pre-operatively, medical staff have predicted the required puncture angle based on the surgical approach and the specific location of the target tissue. During the procedure, after inserting the puncture needle into the operating channel, if fine adjustments to the puncture position are needed, medical staff can adjust it by rotating the corresponding angle-shifting wheel on the outer ring seat. As the wheel rotates, it precisely pulls the corresponding traction wire to retract, while other wheel positions simultaneously relax with the assistance of the traction wire, thus precisely controlling the puncture needle. During the bending angle of the needle tip, the rubber damping pad plays a damping and buffering role, which not only ensures the fine adjustment accuracy when the dial wheel rotates, but also ensures the positional stability of the needle tip after the angle is adjusted. When the dial wheel is rotated clockwise to the corresponding angle, the traction wire on one side tightens and the needle tip bends in the corresponding direction. When rotated counterclockwise, the traction wire loosens and the needle tip automatically resets due to the properties of its own memory alloy. Medical staff, in conjunction with ultrasound or endoscopic guidance, adjust the angle of the needle tip to the puncture direction that matches the target tissue. After positioning, the drug injection operation is performed through the injection channel, thereby achieving precise angle adjustment during the patient's puncture process.After puncture positioning and angle adjustment, the precision drug injection mechanism is activated. Before the procedure, medical staff set the appropriate injection pressure range for the patient's target tissue using a display analyzer. After puncture, the pusher on the syringe begins to descend at a constant speed, squeezing the drug solution inside. The drug solution is then precisely delivered to the patient's affected area via the infusion tubing and the injection channel within the puncture needle. During injection, an electronic regulating valve monitors the pressure of the drug solution flowing from the syringe into the infusion tubing in real time. Simultaneously, a miniature pressure sensor in the injection channel transmits real-time pressure data to the display analyzer for synchronous display. If the local tissue tension at the patient's affected area is too high, causing the drug solution pressure to exceed the preset safe range, the electronic regulating valve on the infusion tubing automatically closes the injection channel. At the same time, an audible and visual alarm on the display analyzer is triggered, promptly alerting medical staff to pause the drug injection. Once the pressure displayed on the analyzer returns to the safe range, medical staff manually restart the injection process. This ensures precise pressure control during injection, preventing tissue damage caused by high-pressure drugs. During the entire injection process, the uniform-speed propulsion mechanism operates continuously to ensure uniform drug delivery. First, the micro servo motor on the external plate starts, and its rotating shaft synchronously drives the lead screw in the mounting frame to rotate. During the rotation of the lead screw, the movable seat adapted to the T-shaped slide groove in the mounting frame moves down synchronously. When the movable seat moves down smoothly along the T-shaped slide groove, it drives the push rod connected to its bottom to move down synchronously and uniformly. During the downward movement of the push rod, it synchronously drives the base at its bottom to move down smoothly in the syringe. When the base moves down, it further drives the connecting rod at its bottom to move down synchronously. During the downward movement of the connecting rod, the offset portion on the elastic plate is compressed, causing it to bend and shift in an arc. As the offset portion bends, the pressure roller slides relative to the surface of the elastic plate, compensating for the elastic force fluctuations caused by changes in the degree of bending. This ensures that the thrust applied by the elastic plate to its bottom Y-shaped frame and piston seat remains stable. Under this stable thrust, the medication in the syringe is smoothly and uniformly propelled out by the piston seat, ultimately achieving continuous and uniform medication delivery during the patient's surgery.

[0016] This invention provides a drug injection and localization puncture device for thyroid surgery. It has the following beneficial effects: 1. This invention, by adding and setting a precise drug injection mechanism, enables precise control of the injection pressure during puncture drug injection for thyroid surgery patients. Firstly, a miniature pressure sensor monitors the drug pressure within the injection channel in real time. Combined with data analysis from a display analyzer and the linkage control of an electronic regulating valve, this effectively avoids the high-pressure injection problems that can occur with manual injection, reducing chemical damage caused by drug leakage to surrounding vital tissues. Secondly, when the drug pressure exceeds the safe range, an audible and visual alarm can promptly trigger a warning and shut down the injection channel, providing timely safety alerts to medical personnel and reducing the risk of complications such as local tissue edema and bleeding caused by over-injection, further ensuring the safety and reliability of the injection process.

[0017] 2. By adding and setting a uniform speed propulsion mechanism, this invention enables the smooth and uniform downward movement of the push rod during puncture and drug injection for thyroid surgery patients. This ensures a stable push of the drug solution throughout the injection process, solving the problem of flow fluctuation caused by changes in channel resistance in traditional manual injection. Furthermore, the cooperative structure of the elastic plate, pressure roller, and connecting rod effectively compensates for the elastic force fluctuations generated during the bending of the elastic plate, ensuring that the piston seat's thrust on the drug solution remains stable. This allows the drug to be evenly distributed in the target tissue area, avoiding local accumulation or uneven distribution that could affect the treatment effect. At the same time, it reduces the operational burden on medical staff and improves the convenience of the injection operation.

[0018] 3. By adding and setting a dual-mode guidance mechanism, this invention, when performing puncture and injection on patients undergoing thyroid surgery, firstly uses a miniature ultrasound probe to acquire two-dimensional structural images of the tissue surrounding the needle tip, accurately identifying the locations of key tissues such as the recurrent laryngeal nerve, parathyroid glands, and major blood vessels in the neck, providing clear structural positioning information for puncture. Secondly, the endoscopic probe can acquire real-time optical images of the needle shaft tip, intuitively presenting the contact state between the needle tip and the target tissue. The superposition and fusion of the two modal images form a dual guidance system, allowing medical personnel to adjust the needle insertion angle and depth in real time, significantly improving the accuracy of puncture positioning, avoiding the risk of tissue damage during puncture, and adapting to complex puncture scenarios, thus improving the applicability of the surgery.

[0019] 4. By adding and setting a puncture adjustment mechanism, this invention can not only precisely adjust the bending angle of the needle tip by rotating the actuating wheel on the outer ring seat to pull the traction wire during puncture and drug injection in patients undergoing thyroid surgery, thus meeting the puncture angle requirements of different surgical approaches and target tissue locations, and solving the problem of fixed angle and inconvenient adjustment of traditional straight rod puncture needles, but also ensure the fine-tuning accuracy when the actuating wheel rotates, and ensure the positional stability of the needle tip after angle adjustment by using the damping effect of the rubber damping pad. This avoids angle deviation during puncture affecting the positioning effect, improves the flexibility and controllability of puncture operation, and helps medical staff to complete puncture positioning efficiently. Attached Figure Description

[0020] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a schematic diagram of the rear structure of the present invention; Figure 3 This is a partial structural diagram of the injection cartridge of the present invention; Figure 4 This is a partial structural diagram of the puncture needle shaft of the present invention; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A; Figure 6 This is a partial structural diagram of the actuating wheel of the present invention; Figure 7 This is a partial structural diagram of the flexible part of the present invention; Figure 8 This is a schematic diagram of the bottom structure of the push rod of the present invention.

[0021] The components include: 1. Injector; 2. Electronic regulating valve; 3. Infusion tube; 4. Puncture needle rod; 5. Flexible part; 6. Outer ring seat; 7. End head; 8. Display analyzer; 9. Audible and visual alarm; 10. Connecting end seat; 11. Lead screw; 12. Mounting bracket; 13. Moving seat; 14. Push rod; 15. External plate; 16. Miniature servo motor; 17. Arc-shaped slot seat; 18. T-shaped slide; 19. Actuating wheel; 20. Display; 21. Needle head; 22. Infusion channel; 23. Miniature pressure sensor; 24. Endoscope probe; 25. Miniature ultrasonic probe; 26. Rubber damping pad; 27. Traction wire; 28. Transmission fiber; 29. ​​Base; 30. Connecting rod; 31. Elastic plate; 32. Pressure roller; 33. Offset part; 34. Y-shaped frame; 35. Piston seat; 36. Signal receiver. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see the appendix Figure 1 -Appendix Figure 2 This invention provides a thyroid surgery drug injection positioning puncture device, including an injection cylinder 1 filled with a drug solution required for thyroid surgery; a puncture needle rod 4, which is composed of a head 7, an adjustable flexible part 5 and a transparent needle head 21 from top to bottom. The puncture needle rod 4 has an injection channel 22 for the flow of drug solution during injection. A connecting end seat 10 is provided at the top of the puncture needle rod 4. The connecting end seat 10 is connected to the bottom of the injection cylinder 1 through a drug delivery tube 3. Please see the appendix Figure 4 -Appendix Figure 5 The dual-mode guiding mechanism is set on the puncture needle rod 4 and is used to perform dual-mode guiding treatment during the puncture of the patient's affected area using the puncture needle rod 4. The dual-mode guiding mechanism includes an arc-shaped slot seat 17. The arc-shaped slot seat 17, which is fixedly connected to the middle of the rear side of the outer plate 15, is snapped onto the side frame of the operating table. A display 20 is provided on the rear side of the arc-shaped slot seat 17. A signal receiver 36 is provided on one side of the bottom of the display 20. A miniature ultrasonic probe 25 and an endoscope probe 24 are sequentially arranged on the inner wall of the drug injection channel 22 near the needle head 21. The endoscope probe 24 is connected to one end of the transmission optical fiber 28. The other end of the transmission optical fiber 28 passes through the flexible part 5 and the end head 7 in sequence and is connected to the signal receiver 36.

[0024] When the dual-mode guidance mechanism is activated, before the operation, medical staff use CT and ultrasound images to accurately locate the target tissue of the patient's affected area and plan the puncture path. Then, the syringe 1 and the monitor 20 are fixedly fixed to the side frame of the patient's operating table through the arc-shaped slot seat 17 to ensure the stability of the equipment position during the operation. After the operation begins, with the real-time assistance of the monitor 20, the medical staff smoothly and accurately insert the puncture needle 4 into the patient's neck tissue.

[0025] During this process, the miniature ultrasound probe 25 integrated on the injection channel 22 continuously collects ultrasound echo signals from the tissue surrounding the needle tip and generates a clear two-dimensional structural image on the display 20. This allows for precise identification of the location of key tissues such as the recurrent laryngeal nerve, parathyroid gland, and major blood vessels in the neck, avoiding puncture risks. Simultaneously, the endoscope probe 24 on the injection channel 22, with the help of the transmission fiber 28 and the needle head 21, collects real-time optical images of the transparent area at the front end of the needle shaft, clearly showing the contact state between the needle tip and the target tissue. This image is also displayed simultaneously on the display 20. Subsequently, the two modal images are superimposed and fused on the display 20, forming a dual guidance system of structural positioning and intuitive vision. Based on the fused image displayed on the display 20, medical staff adjust the needle insertion angle and depth in real time until the needle tip accurately reaches the preset target position, and then initiate the injection operation, thereby completing the puncture guidance and positioning process during the patient's surgery.

[0026] Please see the appendix Figure 4 and attached Figure 6 -Appendix Figure 7 The puncture adjustment mechanism, which is located on the puncture needle shaft 4, is used to adjust the puncture site during the puncture of the patient's affected area.

[0027] The puncture adjustment mechanism includes an outer ring seat 6. The outer ring seat 6 is provided on the outer wall of the end head 7. Multiple actuating wheels 19 are arranged in a circular array on the outer ring seat 6. Rubber damping pads 26 are provided on both sides of the actuating wheels 19.

[0028] When the puncture adjustment mechanism is activated, before the operation, the medical staff have predicted the required puncture angle based on the surgical approach and the specific location of the target tissue. During the operation, after the puncture needle rod 4 is inserted into the operating channel, if it is necessary to make a fine adjustment to the puncture position, the medical staff can adjust it by rotating the corresponding angle of the actuating wheel 19 on the outer ring seat 6. During the rotation of the actuating wheel 19, it will precisely pull the corresponding traction wire 27 to achieve contraction, while the actuating wheels 19 in other positions will simultaneously complete the relaxation action with the cooperation of the traction wire 27, thereby precisely controlling the bending angle of the needle head 21 on the puncture needle rod 4.

[0029] The puncture adjustment mechanism also includes a traction wire 27. Multiple traction wires 27 are arranged in a circular array near the edge of the top of the needle head 21. The top of the traction wire 27 passes through the flexible part 5 and the end head 7 in sequence and is connected to the corresponding actuating wheel 19.

[0030] During this process, the rubber damping pad 26 plays a damping and buffering role, which not only ensures the fine adjustment accuracy when the dial wheel 19 rotates, but also ensures the positional stability of the needle head 21 after angle adjustment. When the dial wheel 19 is rotated clockwise to the corresponding angle, the traction wire 27 on one side tightens and the needle head 21 bends in the corresponding direction. When rotated counterclockwise, the traction wire 27 loosens and the needle head 21 automatically resets due to the characteristics of its own memory alloy. With the guidance of ultrasound or endoscopy, medical staff adjust the angle of the needle head 21 to the puncture direction that matches the target tissue. After positioning, the drug injection operation is performed through the drug injection channel, thereby achieving precise angle adjustment during the patient's puncture process.

[0031] Please see the appendix Figure 3 The precision injection mechanism, which is set on the syringe 1, is used to precisely control and adjust the hydraulic pressure of the injection during thyroid surgery. The precision injection mechanism includes a push rod 14. The syringe 1 is equipped with a push rod 14 to push out the liquid medicine. The infusion tube 3 is equipped with an electronic regulating valve 2 near the syringe 1 to control the flow rate of the liquid medicine discharged from the infusion tube 3.

[0032] When the precision drug injection device is activated, before the procedure, medical staff set the appropriate drug injection pressure range for the patient based on the type of the patient's target tissue using the display analyzer 8. After the puncture is completed, the push rod 14 on the syringe 1 begins to move downward at a constant speed, squeezing the drug in the syringe 1. The drug is then precisely delivered to the patient's affected area through the infusion tube 3 and the injection channel 22 in the puncture needle rod 4. During the injection process, the electronic regulating valve 2 monitors the pressure of the drug flowing from the syringe 1 into the infusion tube 3 in real time.

[0033] The precision injection mechanism also includes a miniature pressure sensor 23. A miniature pressure sensor 23 is installed in the injection channel 22 near the needle tip 21 to monitor the internal pressure of the drug. The miniature pressure sensor 23 is connected to the external display analyzer 8 via a communication connection. The display analyzer 8 receives the pressure data information transmitted by the miniature pressure sensor 23 in real time and analyzes it. The analysis results are converted into control signals to control and adjust the electronic regulating valve 2. An audible and visual alarm 9 is installed at the top center of the display analyzer 8.

[0034] Simultaneously, the miniature pressure sensor 23 of the drug infusion channel 22 transmits real-time pressure data to the display analyzer 8 for synchronous display. If the local tissue tension at the patient's affected area is too high, causing the drug pressure to exceed the preset safe range, the electronic regulating valve 2 on the infusion tube 3 will automatically close the drug injection channel. At the same time, the audible and visual alarm 9 on the display analyzer 8 will trigger an audible and visual alarm, promptly reminding medical staff to stop the drug injection.

[0035] Once the pressure value displayed on the analyzer 8 returns to a safe range, medical staff can manually restart the injection process to achieve precise pressure control during the injection process and avoid tissue damage caused by high-pressure medication.

[0036] Please see the appendix Figure 3 and attached Figure 8 The uniform speed propulsion mechanism is set on the syringe 1 and is used to propel the drug solution at a uniform speed under different pressure conditions during the drug injection process of the precision drug injection mechanism to the patient. The uniform speed propulsion mechanism includes an outer plate 15. The outer plate 15 is fixedly connected to the top of the outer wall of the syringe 1. The mounting bracket 12 is fixedly connected to the middle of the top of the outer plate 15. The movable seat 13 is slidably connected to the middle of the inner side of the mounting bracket 12. The middle of the bottom end of the movable seat 13 is engaged with the top of the push rod 14. T-shaped grooves 18 are opened on both sides of the middle of the inner wall of the mounting bracket 12. The two ends of the movable seat 13 extend to the corresponding positions of the T-shaped grooves 18.

[0037] The uniform speed propulsion mechanism also includes lead screws 11. Lead screws 11 are rotatably connected to both sides of the mounting bracket 12. The bottom ends of the lead screws 11 pass through the corresponding positions of the moving base 13 and are connected to the corresponding positions of the top of the external plate 15. Miniature servo motors 16 are provided on both sides of the bottom of the external plate 15, and the output ends of the miniature servo motors 16 are connected to the bottom of the corresponding lead screws 11. The two miniature servo motors 16 are controlled by a servo controller to ensure the synchronization of the drive.

[0038] When the uniform speed propulsion mechanism is started, to ensure the uniform speed delivery of the medicine, the micro servo motor 16 on the external plate 15 is started first. When its shaft rotates, it synchronously drives the lead screw 11 in the mounting frame 12 to rotate. During the rotation of the lead screw 11, it drives the movable seat 13 in the mounting frame 12 that is adapted to the T-shaped slide 18 to move down synchronously. When the movable seat 13 moves down smoothly along the T-shaped slide 18, it drives the push rod 14 connected to its bottom to move down synchronously and uniformly.

[0039] The uniform speed propulsion mechanism also includes a base 29. The bottom of the push rod 14 is fixedly connected to the base 29. The lower part of the base 29 is provided with a piston seat 35 for squeezing out the liquid medicine inside the injection cylinder 1. The top center of the piston seat 35 is rotatably connected to a Y-shaped frame 34. Both ends of the top of the Y-shaped frame 34 are rotatably connected to elastic plates 31. The elastic plates 31 are provided with offset parts 33. Each side of the inner wall of the elastic plates 31 is provided with a pressure roller 32. The bottom sides of the base 29 are connected to the corresponding positions at the ends of the elastic plates 31 through connecting rods 30.

[0040] As the push rod 14 moves downward, it simultaneously drives the base 29 at its bottom to move smoothly downward inside the syringe 1. When the base 29 moves downward, it further drives the connecting rod 30 at its bottom to move downward simultaneously. During the downward movement of the connecting rod 30, it squeezes the offset part 33 on the elastic plate 31, causing the offset part 33 to bend and shift in an arc shape.

[0041] When the offset part 33 undergoes arc-shaped bending offset, the pressure roller 32 will slide relative to the surface of the elastic plate 31 as the bending changes occur, thereby compensating for the elastic force fluctuation caused by the change in the degree of bending of the elastic plate 31. This ensures that the thrust applied by the elastic plate 31 to its bottom Y-shaped frame 34 and piston seat 35 remains stable. Under this stable thrust, the liquid medicine in the syringe 1 is pushed out at a uniform speed by the piston seat 35, ultimately achieving continuous and uniform speed propulsion of the liquid medicine during the patient's surgery.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drug injection and positioning puncture device for thyroid surgery, characterized in that, include, Injector (1), the inside of which is filled with the medication required for thyroid surgery; The puncture needle rod (4) is composed of an end head (7), an adjustable flexible part (5) and a transparent needle head (21) from top to bottom. The puncture needle rod (4) has an injection channel (22) for the flow of drug liquid during the injection process. The top of the puncture needle rod (4) is provided with a connecting end seat (10). The connecting end (10) is connected to the bottom of the syringe (1) through the drug delivery tube (3); The precision injection mechanism is set on the syringe (1) and is used to precisely control and adjust the hydraulic pressure of the injection during thyroid surgery. The uniform speed propulsion mechanism is set on the syringe (1) and is used to propel the drug liquid at a uniform speed under different pressure conditions during the drug injection process of the precision drug injection mechanism to the patient. A dual-mode guiding mechanism is provided on the puncture needle rod (4) and is used for dual-mode guiding during the puncture of the patient's affected area using the puncture needle rod (4); The puncture adjustment mechanism is set on the puncture needle rod (4) and is used to adjust the puncture site during the puncture process of the patient's affected area.

2. The thyroid surgery drug injection and positioning puncture device according to claim 1, characterized in that, The precision injection mechanism includes a push rod (14), and the inside of the injection cylinder (1) is provided with a push rod (14) to push out the liquid medicine. The delivery tube (3) is provided with an electronic regulating valve (2) for controlling the flow rate of the liquid medicine discharged from the delivery tube (3) near the injection cylinder (1).

3. The thyroid surgery drug injection and positioning puncture device according to claim 1, characterized in that, The precision injection mechanism also includes a miniature pressure sensor (23). A miniature pressure sensor (23) is installed in the injection channel (22) near the needle head (21) to monitor the internal pressure of the drug. The miniature pressure sensor (23) is connected to the external display analyzer (8) via a communication connection. The display analyzer (8) receives the pressure data information transmitted by the miniature pressure sensor (23) in real time and analyzes it. The analysis results are converted into control signals to control and adjust the electronic regulating valve (2). An audible and visual alarm (9) is installed at the top center of the display analyzer (8).

4. The thyroid surgery drug injection and positioning puncture device according to claim 1, characterized in that, The uniform speed propulsion mechanism includes an outer plate (15). The top of the outer wall of the syringe (1) is fixedly connected to the outer plate (15). The top center of the outer plate (15) is fixedly connected to the mounting bracket (12). The inner center of the mounting bracket (12) is slidably connected to the movable seat (13). The bottom center of the movable seat (13) is engaged with the top of the push rod (14). T-shaped grooves (18) are opened on both sides of the inner wall of the mounting bracket (12). The two ends of the movable seat (13) extend to the corresponding positions of the T-shaped grooves (18).

5. The thyroid surgery drug injection and positioning puncture device according to claim 4, characterized in that, The uniform speed propulsion mechanism also includes a lead screw (11). The lead screw (11) is rotatably connected to both sides of the mounting frame (12). The bottom end of the lead screw (11) passes through the corresponding position of the moving seat (13) and is connected to the corresponding position of the top of the external plate (15). The bottom sides of the external plate (15) are provided with micro servo motors (16), and the output end of the micro servo motor (16) is connected to the bottom of the corresponding side lead screw (11). The two micro servo motors (16) are controlled by a servo controller to ensure the synchronization of the drive.

6. The thyroid surgery drug injection and positioning puncture device according to claim 5, characterized in that, The uniform speed propulsion mechanism also includes a base (29). The bottom of the push rod (14) is fixedly connected to the base (29). The lower part of the base (29) is provided with a piston seat (35) for squeezing out the liquid medicine inside the injection cylinder (1). The top center of the piston seat (35) is rotatably connected to a Y-shaped frame (34). Both ends of the top of the Y-shaped frame (34) are rotatably connected to elastic plates (31). The elastic plates (31) are provided with offset parts (33). The inner wall of the elastic plates (31) is provided with pressure rollers (32). The bottom sides of the base (29) are connected to the corresponding positions at the ends of the elastic plates (31) through connecting rods (30).

7. The thyroid surgery drug injection and positioning puncture device according to claim 5, characterized in that, The dual-mode guiding mechanism includes an arc-shaped slot seat (17). The arc-shaped slot seat (17) is fixedly connected to the middle of the rear side of the outer plate (15) and is snapped onto the side frame of the operating table. A display (20) is provided on the rear side of the arc-shaped slot seat (17). A signal receiver (36) is provided on one side of the bottom of the display (20). A miniature ultrasonic probe (25) and an endoscope probe (24) are sequentially arranged on the inner wall of the injection channel (22) near the needle head (21). The endoscope probe (24) is connected to one end of a transmission optical fiber (28). The other end of the transmission optical fiber (28) passes through the flexible part (5) and the end head (7) in sequence and is connected to the signal receiver (36).

8. The thyroid surgery drug injection and positioning puncture device according to claim 1, characterized in that, The puncture adjustment mechanism includes an outer ring seat (6), and the outer ring seat (6) is provided on the outer wall of the end head (7). Multiple actuating wheels (19) are arranged in a circular array on the outer ring seat (6), and rubber damping pads (26) are provided on both sides of the actuating wheels (19).

9. The thyroid surgery drug injection and positioning puncture device according to claim 8, characterized in that, The puncture adjustment mechanism also includes a traction wire (27). Multiple traction wires (27) are arranged in a circular array near the edge of the top of the needle head (21). The top of the traction wire (27) passes through the flexible part (5) and the end head (7) in sequence and is connected to the corresponding actuating wheel (19).

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