Nerve block anesthesia injection pressure testing device under ultrasound

Abstract

The invention discloses an ultrasonic nerve block anesthesia injection pressure testing device, which comprises a testing assembly, and the testing assembly comprises an injection tube, a connector, an injection needle, a piston head, a push rod, a testing chamber, a pressure sensor, a mounting plate, a controller, a display, a warning lamp, a sliding rail, a sliding block, a clamping block, a support frame, an electric cylinder, a lifting plate and a connecting rod. A connector is fixedly arranged on the right side wall of the injection cylinder, an injection needle is inserted into the right end of the connector, a piston head is slidably connected to the inner side wall of the injection cylinder, and a push rod is slidably connected to the left side wall of the injection cylinder. The push rod is pushed inwards to drive the piston head to move, medicine in the syringe is injected to the periphery of a nerve along the injection needle, medicine injection pressure can be detected through the pressure sensor, data are displayed through the displayer so that a doctor can observe the medicine injection pressure conveniently, and if the medicine injection pressure is too large, the warning lamp is controlled to flicker to send out a lamplight early warning signal; a doctor is reminded to slow down the medicine injection speed.

Description

Technical Field

[0001] This invention relates to a drug injection pressure testing device, specifically a drug injection pressure testing device for ultrasound-guided nerve block anesthesia, belonging to the field of medical device technology. Background Technology

[0002] Nerve block is a method of pain management, commonly used in surgical anesthesia. Anesthetic drugs are injected around the nerve to block the conduction of some sensory nerves, preventing the patient from feeling pain during surgery. Traditional nerve block techniques lack guidance, easily leading to repeated needle pricks and prolonged operation time, causing unnecessary pain for the patient. If the doctor's operation is not precise, it can also damage the patient's blood vessels, resulting in local hematoma. Ultrasound-guided nerve block anesthesia, however, is a novel method. It utilizes ultrasound imaging technology to locate and block nerves. Ultrasound guidance allows for image processing of human body information, enabling real-time detection of human tissues. It can clearly distinguish nerves, muscles, tendons, etc., and accurately apply drugs to the nerves causing pain according to the nerve pathway. This improves the accuracy of drug injection, avoids repeated needle pricks, reduces patient pain, enhances the effectiveness of the drug, and reduces complications of nerve block.

[0003] During ultrasound-guided nerve block anesthesia, medication is injected around the nerve using a needle. Clinical studies have shown that excessive injection pressure exceeding a certain preset value may damage the nerve and affect the patient's health. Injection pressure is affected by various factors such as needle size, needle type, and injection speed. Specifically, the faster the doctor advances the medication, the greater the injection pressure. To ensure the safety of the injection procedure, controlling the injection pressure and preventing excessive pressure from damaging the nerve has become one of the urgent problems to be solved in ultrasound-guided nerve block anesthesia. To address this, an ultrasound-guided nerve block anesthesia injection pressure testing device is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide an ultrasound-guided nerve block anesthesia injection pressure testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an ultrasound-guided nerve block anesthesia injection pressure testing device, comprising a testing component, wherein the testing component includes an injection cylinder, a connector, an injection needle, a piston head, a push rod, a testing chamber, a pressure sensor, a mounting plate, a controller, a display, a warning light, a slide rail, a slider, a clamping block, a support frame, an electric cylinder, a lifting plate, and a connecting rod;

[0006] A connector is fixedly provided on the right side wall of the syringe, and an injection needle is inserted into the right end of the connector. A piston head is slidably connected to the inner side wall of the syringe, and a push rod is slidably connected to the left side wall of the syringe. The right end of the push rod is fixedly connected to the left side wall of the piston head. A test chamber is connected to the upper part of the right side wall of the syringe, and a pressure sensor is installed at the right end of the test chamber. The probe end of the pressure sensor extends into the test chamber. A mounting plate is fixedly connected to the right side of the upper surface of the syringe. A controller, a display, and a warning light are respectively installed on the upper surface of the mounting plate. Two slide rails are symmetrically fixedly connected to the left side wall of the syringe. A slider is slidably connected to the inner side wall of the slide rail, and a clamping block is welded to the left side wall of the slider. A support frame is fixedly provided on the left side of the upper surface of the syringe. An electric cylinder is installed at the top of the inner side wall of the support frame. A lifting plate is fixedly connected to one end of the piston rod of the electric cylinder. Two connecting rods are symmetrically hinged to the lower surface of the lifting plate, and the bottom ends of the connecting rods are hinged to the outer side wall of the clamping block.

[0007] As a further preferred embodiment of this technical solution: the test assembly further includes a movable plate, a rubber pad, a guide rod, and a guide cylinder; the electrical output terminal of the pressure sensor is electrically connected to the electrical input terminal of the controller; and the electrical output terminal of the controller is electrically connected to the electrical input terminals of the display, the warning light, and the electric cylinder respectively via wires.

[0008] As a further preferred embodiment of this technical solution, the inner wall of the clamping block is bonded with a rubber pad.

[0009] As a further preferred embodiment of this technical solution: a movable plate is fixedly connected to the left end of the push rod.

[0010] As a further preferred embodiment of this technical solution, two guide rods are symmetrically welded to the upper surface of the lifting plate.

[0011] As a further preferred embodiment of this technical solution: two guide cylinders are symmetrically welded to the top of the inner sidewall of the support frame, and the outer sidewall of the guide rod is slidably connected to the inner sidewall of the guide cylinder.

[0012] As a further preferred embodiment of this technical solution: a connecting assembly is installed on the outer side wall of the pressure sensor, the connecting assembly including a connecting pipe, an external thread, an internal thread, a conical rubber ring and a sealing ring, and a connecting pipe is fixedly connected to the left side wall of the pressure sensor.

[0013] As a further preferred embodiment of this technical solution: the outer side wall of the connecting pipe is provided with an external thread, and the right side of the inner side wall of the test chamber is provided with an internal thread, and the connecting pipe and the test chamber are connected by the external thread and the internal thread.

[0014] As a further preferred embodiment of this technical solution: a conical rubber ring is adhered to the left side wall of the pressure sensor, and the conical rubber ring is located on the outside of the connecting pipe.

[0015] As a further preferred embodiment of this technical solution, a sealing ring is adhered to the right side wall of the test chamber.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This invention uses an inward-pushing push rod to move the piston head, injecting medication from the syringe along the injection needle into the area around the nerve. A pressure sensor detects the injection pressure and displays the data on a monitor for easy observation by the doctor. If the injection pressure is too high, a warning light flashes to alert the doctor to slow the injection rate. Simultaneously, an electric cylinder drives a lifting plate downwards, pressing down on a connecting rod. This pushes two clamping blocks closer together, clamping the push rod and increasing its resistance to further slow the injection rate. This allows for testing and displaying the injection pressure, and the automatic increase in injection resistance by the clamping blocks effectively controls the pressure, preventing nerve damage and ensuring the safety of ultrasound-guided nerve block anesthesia. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0019] Figure 2 This is a bottom-view structural diagram of the present invention;

[0020] Figure 3 This is a partial cross-sectional structural schematic diagram of the present invention;

[0021] Figure 4 In this invention Figure 2 Enlarged view of the structure of area A;

[0022] Figure 5 In this invention Figure 3 Enlarged view of the structure of area B;

[0023] Figure 6 This is a schematic diagram of the test chamber and internal thread in this invention;

[0024] Figure 7 This is a schematic diagram of the structure of some of the connecting components in this invention;

[0025] Figure 8 This is a schematic diagram of the pressure sensor and the conical rubber ring in this invention.

[0026] In the diagram: 10. Test component; 11. Injector; 12. Connector; 13. Injection needle; 14. Piston head; 15. Push rod; 16. Movable plate; 17. Test chamber; 18. Pressure sensor; 19. Mounting plate; 110. Controller; 111. Display; 112. Warning light; 113. Slide rail; 114. Slider; 115. Clamping block; 116. Support frame; 117. Electric cylinder; 118. Lifting plate; 119. Connecting rod; 120. Rubber pad; 121. Guide rod; 122. Guide cylinder; 20. Connecting component; 21. Connecting pipe; 22. External thread; 23. Internal thread; 24. Conical rubber ring; 25. Sealing ring. Detailed Implementation

[0027] The technical solutions of 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.

[0028] Please see Figure 1-8 The present invention provides a technical solution: an ultrasound-guided nerve block anesthesia injection pressure testing device, comprising a testing component 10, which includes an injection cylinder 11, a connector 12, an injection needle 13, a piston head 14, a push rod 15, a testing chamber 17, a pressure sensor 18, a mounting plate 19, a controller 110, a display 111, a warning light 112, a slide rail 113, a slider 114, a clamping block 115, a support frame 116, an electric cylinder 117, a lifting plate 118, and a connecting rod 119;

[0029] A connector 12 is fixedly installed on the right side wall of the syringe 11, and an injection needle 13 is inserted into the right end of the connector 12. A piston head 14 is slidably connected to the inner side wall of the syringe 11, and a push rod 15 is slidably connected to the left side wall of the syringe 11. The right end of the push rod 15 is fixedly connected to the left side wall of the piston head 14. A test chamber 17 is connected to the upper part of the right side wall of the syringe 11. A pressure sensor 18 is installed at the right end of the test chamber 17, and the probe end of the pressure sensor 18 extends into the test chamber 17. A mounting plate 19 is fixedly connected to the right side of the upper surface of the syringe 11. A controller 110, a display 111, and a warning light 112 are respectively installed on the upper surface of the mounting plate 19. Two slide rails 113 are symmetrically fixedly connected to the left side wall of the syringe 11. A slider 114 is slidably connected to the inner side wall of the slide rail 113. A clamping block 115 is welded to the left side wall of the slider 114. A support frame 116 is fixedly provided on the left side of the upper surface of the syringe 11. An electric cylinder 117 is installed on the top of the inner side wall of the support frame 116. A lifting plate 118 is fixedly connected to one end of the piston rod of the electric cylinder 117. Two connecting rods 119 are symmetrically hinged to the lower surface of the lifting plate 118. The bottom end of the connecting rod 119 is hinged to the outer side wall of the clamping block 115. The sliding of the slider 114 on the inner side wall of the slide rail 113 can drive the clamping block 115 to slide, so that the clamping block 115... The syringe 15 has a sliding function; by pushing the push rod 15 inward, the piston head 14 moves, injecting the drug in the syringe 11 along the injection needle 13 into the area around the nerve. The injection pressure can be detected by the pressure sensor 18. The controller 110 receives the injection pressure detection data and displays the data on the display 111 for the doctor to observe. If the injection pressure is too high and close to the preset value, it means that the doctor is pushing the push rod 15 too fast. The warning light 112 flashes to issue a light warning signal, reminding the doctor to slow down the injection speed. At the same time, one end of the piston rod of the electric cylinder 117 extends, driving the lifting plate 118 downward. The lifting plate 118 presses down the connecting rod 119. The connecting rod 119 pushes the two clamping blocks 115 closer together to clamp the push rod 15. The friction between the clamping blocks 115 and the push rod 15 increases the resistance to the movement of the push rod 15, which helps to slow down the injection speed and reduce the injection pressure. This prevents the doctor from ignoring the warning light, thus forming an ultrasound-guided nerve block anesthesia injection pressure testing device. It can test the injection pressure and display the pressure value at the same time. When the injection pressure is too high, it can emit a light warning signal to remind the doctor to slow down the injection speed. The clamping blocks 115 automatically increase the injection resistance, effectively controlling the injection pressure and avoiding nerve damage due to excessive injection pressure, thus ensuring the safety of ultrasound-guided nerve block anesthesia injection operation.

[0030] In this embodiment, specifically: the test assembly 10 also includes a movable plate 16, a rubber pad 120, a guide rod 121 and a guide cylinder 122. The electrical output terminal of the pressure sensor 18 is electrically connected to the electrical input terminal of the controller 110. The electrical output terminal of the controller 110 is electrically connected to the electrical input terminals of the display 111, the warning light 112 and the electric cylinder 117 respectively through wires; this facilitates signal transmission and control of each electrical device.

[0031] In this embodiment, specifically: a rubber pad 120 is adhered to the inner wall of the clamping block 115; the rubber pad 120 can increase the friction between the clamping block 115 and the push rod 15, thereby increasing the moving resistance of the push rod 15 and achieving the effect of slowing down the injection speed.

[0032] In this embodiment, specifically: a movable plate 16 is fixedly connected to the left end of the push rod 15; this facilitates the movement of the push rod 15 by moving the movable plate 16.

[0033] In this embodiment, specifically: two guide rods 121 are symmetrically welded to the upper surface of the lifting plate 118; this facilitates the synchronous movement of the guide rods 121 and the lifting plate 118.

[0034] In this embodiment, specifically: two guide cylinders 122 are symmetrically welded to the top of the inner sidewall of the support frame 116, and the outer sidewall of the guide rod 121 is slidably connected to the inner sidewall of the guide cylinder 122; when the guide rod 121 slides up and down on the inner sidewall of the guide cylinder 122, it can provide guidance for the lifting plate 118, thereby improving the stability of the movement of the lifting plate 118.

[0035] In this embodiment, specifically: a connecting component 20 is installed on the outer side wall of the pressure sensor 18. The connecting component 20 includes a connecting pipe 21, an external thread 22, an internal thread 23, a conical rubber ring 24, and a sealing ring 25. The connecting pipe 21 is fixedly connected to the left side wall of the pressure sensor 18. When the pressure sensor 18 moves, it will drive the connecting pipe 21 to move.

[0036] In this embodiment, specifically: the outer side wall of the connecting pipe 21 is provided with an external thread 22, and the right side of the inner side wall of the test chamber 17 is provided with an internal thread 23. The connecting pipe 21 and the test chamber 17 are connected by the external thread 22 and the internal thread 23. By connecting the connecting pipe 21 and the test chamber 17 by thread, the installation and disassembly of the pressure sensor 18 are facilitated, and the pressure sensor 18 is convenient to be inspected.

[0037] In this embodiment, specifically: a conical rubber ring 24 is adhered to the left side wall of the pressure sensor 18, and the conical rubber ring 24 is located outside the connecting pipe 21; this facilitates the synchronous movement of the conical rubber ring 24 and the pressure sensor 18.

[0038] In this embodiment, specifically: a sealing ring 25 is bonded to the right side wall of the test chamber 17; when the connecting pipe 21 is tightened, the sealing ring 25 compresses the conical curved surface of the conical rubber ring 24, causing the conical rubber ring 24 to deform, thus preventing gaps from appearing between the sealing ring 25 and the conical rubber ring 24, ensuring the sealing of the pressure sensor 18 installation, and facilitating the guarantee of its performance.

[0039] The working principle of this invention is as follows: When the connecting pipe 21 is threadedly connected to the test chamber 17 and the connecting pipe 21 is tightened, the sealing ring 25 compresses the conical curved surface of the conical rubber ring 24, causing the conical rubber ring 24 to deform. This prevents gaps between the sealing ring 25 and the conical rubber ring 24, ensuring the sealing of the pressure sensor 18 and facilitating its effectiveness. By pushing the push rod 15 inward, the piston head 14 moves, injecting the drug in the syringe 11 along the injection needle 13 into the area around the nerve. The injection pressure can be detected by the pressure sensor 18. The controller 110 receives the injection pressure detection data and displays it on the display 111 for the doctor's observation. If the injection pressure is too high and close to the preset value, it means that the doctor is pushing the push rod 15 too fast. The warning light 112 is then controlled to flash to issue a light warning signal, reminding the doctor. The doctor slows down the injection rate, and simultaneously, the piston rod of the electric cylinder 117 extends, causing the lifting plate 118 to move downwards. The lifting plate 118 presses down on the connecting rod 119, which in turn pushes two clamping blocks 115 closer together to clamp the push rod 15. The friction between the clamping blocks 115 and the push rod 15 increases the resistance to the push rod 15, thus helping to slow down the injection rate and reduce the injection pressure. This prevents the doctor from ignoring the warning light, thus forming an ultrasound-guided nerve block anesthesia injection pressure testing device. It can test the injection pressure and display the pressure value. When the injection pressure is too high, it can emit a light warning signal to remind the doctor to slow down the injection rate. The clamping blocks 115 automatically increase the injection resistance, effectively controlling the injection pressure and preventing nerve damage due to excessive injection pressure, thus ensuring the safety of ultrasound-guided nerve block anesthesia injection.

[0040] 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 device for testing injection pressure in ultrasound-guided nerve block anesthesia, comprising a testing component (10), characterized in that: The test assembly (10) includes an injection cylinder (11), a connector (12), an injection needle (13), a piston head (14), a push rod (15), a test chamber (17), a pressure sensor (18), a mounting plate (19), a controller (110), a display (111), a warning light (112), a slide rail (113), a slider (114), a clamping block (115), a support frame (116), an electric cylinder (117), a lifting plate (118), and a connecting rod (119). A connector (12) is fixedly provided on the right side wall of the syringe (11), and an injection needle (13) is inserted into the right end of the connector (12). A piston head (14) is slidably connected to the inner side wall of the syringe (11), and a push rod (15) is slidably connected to the left side wall of the syringe (11). The right end of the push rod (15) is fixedly connected to the left side wall of the piston head (14). A test chamber (17) is connected to the upper part of the right side wall of the syringe (11). A pressure sensor (18) is installed at the right end of the test chamber (17), and the probe end of the pressure sensor (18) extends into the test chamber (17). A mounting plate (19) is fixedly connected to the right side of the upper surface of the syringe (11), and the upper surface of the mounting plate (19) is respectively equipped with... The syringe (11) includes a controller (110), a display (111), and a warning light (112). Two slide rails (113) are symmetrically fixedly connected to the left side wall of the syringe (11). A slider (114) is slidably connected to the inner side wall of the slide rails (113). A clamping block (115) is welded to the left side wall of the slider (114). A support frame (116) is fixedly provided on the left side of the upper surface of the syringe (11). An electric cylinder (117) is installed on the top of the inner side wall of the support frame (116). A lifting plate (118) is fixedly connected to one end of the piston rod of the electric cylinder (117). Two connecting rods (119) are symmetrically hinged to the lower surface of the lifting plate (118). The bottom end of the connecting rod (119) is hinged to the outer side wall of the clamping block (115).

2. The ultrasound-guided nerve block anesthesia injection pressure testing device according to claim 1, characterized in that: The test assembly (10) also includes a movable plate (16), a rubber pad (120), a guide rod (121), and a guide cylinder (122). The electrical output terminal of the pressure sensor (18) is electrically connected to the electrical input terminal of the controller (110). The electrical output terminal of the controller (110) is electrically connected to the electrical input terminals of the display (111), the warning light (112), and the electric cylinder (117) via wires.

3. The ultrasound-guided nerve block anesthesia injection pressure testing device according to claim 2, characterized in that: A rubber pad (120) is bonded to the inner wall of the clamping block (115).

4. The ultrasound-guided nerve block anesthesia injection pressure testing device according to claim 2, characterized in that: A movable plate (16) is fixedly connected to the left end of the push rod (15).

5. The ultrasound-guided nerve block anesthesia injection pressure testing device according to claim 2, characterized in that: Two guide rods (121) are symmetrically welded to the upper surface of the lifting plate (118).

6. The ultrasound-guided nerve block anesthesia injection pressure testing device according to claim 5, characterized in that: The support frame (116) has two guide cylinders (122) symmetrically welded to the top of its inner wall, and the outer wall of the guide rod (121) is slidably connected to the inner wall of the guide cylinder (122).

7. The ultrasound-guided nerve block anesthesia injection pressure testing device according to claim 1, characterized in that: The pressure sensor (18) has a connecting assembly (20) installed on its outer side wall. The connecting assembly (20) includes a connecting pipe (21), an external thread (22), an internal thread (23), a conical rubber ring (24), and a sealing ring (25). The connecting pipe (21) is fixedly connected to the left side wall of the pressure sensor (18).

8. The ultrasound-guided nerve block anesthesia injection pressure testing device according to claim 7, characterized in that: The outer side wall of the connecting pipe (21) is provided with an external thread (22), and the right side of the inner side wall of the test chamber (17) is provided with an internal thread (23). The connecting pipe (21) and the test chamber (17) are connected by the external thread (22) and the internal thread (23).

9. The ultrasound-guided nerve block anesthesia injection pressure testing device according to claim 7, characterized in that: A conical rubber ring (24) is bonded to the left side wall of the pressure sensor (18), and the conical rubber ring (24) is located outside the connecting pipe (21).

10. The ultrasound-guided nerve block anesthesia injection pressure testing device according to claim 7, characterized in that: A sealing ring (25) is bonded to the right side wall of the test chamber (17).

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