A laryngeal mask anti-bending performance testing device

Abstract

The utility model relates to laryngeal mask testing technical field, and disclose a laryngeal mask bending resistance testing device, including tester, the top of tester is provided with a plurality of fixed mechanism, the fixed mechanism includes two groups of slide rails, and each group slide rail is two and presents before and after symmetry and sets up, the inside sliding connection of slide rail has the sliding block, the top outer surface of sliding block is fixedly connected with telescopic link, and the outer surface of two telescopic link movable ends is all fixedly connected with arc clamping plate, and the rotating penetration of two fixed blocks between has the pivot, and the outer surface screw thread of screw tooth is equipped with butterfly nut. Through two groups of arc clamping plate respectively clamping the both ends of laryngeal mask, and by unscrewing butterfly nut, make a group of slide rails drive pivot rotation, adjust the bending position of one group arc clamping plate, to make laryngeal mask bend, carry out bending test, adjust the rotation angle of slide rail, adjust laryngeal mask bending degree.

Description

Technical Field

[0001] This utility model relates to the field of laryngeal mask testing technology, specifically a laryngeal mask bending resistance testing device. Background Technology

[0002] In modern medicine, the laryngeal mask airway (LMA) is a crucial device for establishing an artificial airway and is widely used in general anesthesia, emergency resuscitation, and other scenarios. Compared to traditional endotracheal intubation, the LMA offers advantages such as ease of operation and less patient stimulation. However, due to the physiological curves from the mouth to the pharynx, the LMA's main tube is highly susceptible to bending or flattening under external forces during insertion. For example, changes in patient position or the surgeon's manipulation during surgery can cause the LMA to bend. If the LMA's resistance to bending is poor, the lumen may deform, affecting ventilation and, in severe cases, even obstructing the airway, posing a significant risk of suffocation and endangering the patient's life. Therefore, the LMA must undergo bending resistance testing to ensure functional stability in complex clinical settings.

[0003] Existing laryngeal mask airway (LMA) bending resistance testing instruments are equipped with multiple bending clamping stations, allowing simultaneous testing of the bending resistance of LMAs of different specifications. However, the degree of bending is mostly designed with fixed parameters. The bending angle and radius of curvature are fixed and cannot be continuously or steppedly adjusted according to testing requirements. This design means that the equipment can only evaluate the performance of the LMA under specific bending conditions, making it difficult to simulate the full range of stress scenarios in clinical settings, from slight bending to extreme bending. Therefore, a new LMA bending resistance testing device is proposed. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a laryngeal mask bending resistance testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a laryngeal mask bending resistance testing device, comprising a testing instrument, the top of which is provided with multiple fixing mechanisms, each fixing mechanism comprising two sets of slide rails, each set consisting of two slide rails arranged symmetrically front and back, a slider being slidably connected inside the slide rail, a telescopic rod being fixedly connected to the top outer surface of the slider, and arc-shaped clamps being fixedly connected to the outer surfaces of the opposing movable ends of the two telescopic rods, two fixing blocks being fixedly connected to the top outer surface of the testing instrument, and a rotating shaft passing through the two fixing blocks, one set of slide rails being fixedly sleeved on the outer surface of the rotating shaft, the outer surface of the rotating shaft having threaded teeth, and a wing nut being threaded onto the outer surface of the threaded teeth, the wing nut abutting against the surface of the fixing block.

[0006] Furthermore, the telescopic rod includes a fixed rod and a movable rod. The movable rod is movably inserted inside the fixed rod. The outer surface of the movable rod has multiple positioning holes arranged in a linear array. A positioning rod is movably inserted into the outer surface of the fixed rod. A pull plate is fixedly connected to the outer surface of the positioning rod. A spring is fixedly connected between the pull plate and the fixed rod. The spring is sleeved on the outside of the positioning rod. The other end of the positioning rod is movably inserted into one of the positioning holes.

[0007] Furthermore, the outer surfaces of both the slider and the slide rail are provided with limiting holes. The limiting holes on the surface of the slide rail are a plurality of holes arranged in a linear array. The slider and the slide rail are internally threaded with bolts in the corresponding limiting holes, and the outer surface of the bolts is fixedly connected with knobs.

[0008] Furthermore, a support block is fixedly connected to the top outer surface of the tester at the center of the two sets of slide rails, and a tray is fixedly connected to the top outer surface of the support block.

[0009] Furthermore, two elastic bands are fixedly connected to the outer surfaces of both the front and rear sides of the tray, and the surfaces of the two elastic bands are respectively provided with a hook and loop surface and a hook and loop barbed surface.

[0010] Furthermore, a medical silicone pad is provided on the outer surface of the arc-shaped clamp, and the surface of the medical silicone pad is frosted.

[0011] Furthermore, the inner curvature of the arc-shaped clamps within the multiple fixing mechanisms is inconsistent.

[0012] Furthermore, a washer is provided between the wing nut and the fixing block.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The laryngeal mask bending performance testing device uses two sets of arc-shaped clamps to hold both ends of the laryngeal mask. By unscrewing the wing nuts, a set of slide rails drives the rotating shaft to rotate. Adjusting the bending position of one set of arc-shaped clamps causes the laryngeal mask to bend, thus conducting a bending test. The degree of bending of the laryngeal mask is adjusted by adjusting the rotation angle of the slide rails.

[0015] 2. The laryngeal mask bending resistance testing device, by pulling the pull plate, causes the positioning rod to disengage from the inside of the positioning hole, releases the limit between the fixed rod and the movable rod, adjusts the position of the movable rod inside the fixed rod, adjusts the height of the arc-shaped clamp, thereby adjusting the axis of the arc-shaped clamp, so that the axis of the arc-shaped clamp and the axis of the laryngeal mask are located on the same axis. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model from below;

[0018] Figure 3 This is a schematic diagram of the two sets of slide rails and their related structures of this utility model;

[0019] Figure 4 This is a schematic diagram of one set of slide rail structures of this utility model;

[0020] Figure 5 This is a schematic diagram of another set of slide rail structures of this utility model;

[0021] Figure 6 for Figure 4 Enlarged structural diagram at point A in the middle;

[0022] Figure 7 for Figure 5 Enlarged structural diagram at point B.

[0023] In the diagram: 1. Tester; 2. Slide rail; 3. Slider; 4. Fixed rod; 5. Movable rod; 6. Arc-shaped clamp; 7. Fixed block; 8. Rotating shaft; 9. Thread; 10. Wing nut; 11. Limiting hole; 12. Knob; 13. Positioning hole; 14. Positioning rod; 15. Spring; 16. Support block; 17. Support plate; 18. Elastic band. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please refer to the following: Figures 1-7This utility model provides a technical solution: a laryngeal mask bending resistance testing device, including a testing instrument 1. The top of the testing instrument 1 is equipped with multiple fixing mechanisms, each including two sets of slide rails 2, each set consisting of two slide rails arranged symmetrically front and back. A slider 3 is slidably connected inside each slide rail 2. A telescopic rod is fixedly connected to the top outer surface of each slider 3. Arc-shaped clamps 6 are fixedly connected to the opposite outer surfaces of the movable ends of the two telescopic rods. Two fixing blocks 7 are fixedly connected to the top outer surface of the testing instrument 1, and a rotating shaft 8 passes through the two fixing blocks 7. One set of slide rails 2 is fixed... A wing nut 10 is fitted onto the outer surface of the rotating shaft 8, and the outer surface of the rotating shaft 8 has a threaded tooth 9. The wing nut 10 is threaded onto the outer surface of the threaded tooth 9. The wing nut 10 abuts against the surface of the fixing block 7. Specifically, by loosening the wing nut 10 through the arc-shaped clamp 6, the wing nut 10 is loosened from the fixing block 7, reducing the friction between the wing nut 10 and the fixing block 7, so that the rotating shaft 8 can rotate. This adjusts the angle of another set of sliders 3, causing one end of the laryngeal mask to rotate, thereby bending the laryngeal mask for a bending test.

[0026] The measuring instrument is equipped with a high-precision electronic flow meter to measure gas flow in real time, a built-in high-precision differential pressure sensor to measure the pressure difference before and after bending the laryngeal mask sample in real time, thereby calculating the pressure drop, a gas pressure regulating valve to adjust and maintain the stable inlet pressure, a gas temperature flow regulating valve to adjust and maintain the stable inlet flow, PLC control, a 7-inch industrial-grade touch screen operation, and a micro printer to directly print test reports.

[0027] Furthermore, the telescopic rod includes a fixed rod 4 and a movable rod 5. The movable rod 5 is movably inserted inside the fixed rod 4. The outer surface of the movable rod 5 has multiple positioning holes 13 arranged in a linear array. The outer surface of the fixed rod 4 is movably inserted with a positioning rod 14. A pull plate is fixedly connected to the outer surface of the positioning rod 14. A spring 15 is fixedly connected between the pull plate and the fixed rod 4. The spring 15 is sleeved on the outside of the positioning rod 14. The other end of the positioning rod 14 is movably inserted inside one of the positioning holes 13. Specifically, by pulling the pull plate, the pull plate drives the positioning rod 14 to move, causing the positioning rod 14 to disengage from the inside of the positioning hole 13, adjusting the position of the movable rod 5 inside the fixed rod 4, thereby adjusting the height of the arc-shaped clamp 6, so that the arc-shaped clamp 6 and the laryngeal mask tube maintain the same axis.

[0028] Furthermore, limit holes 11 are provided on the outer surfaces of both the slider 3 and the slide rail 2. There are several limit holes 11 on the surface of the slide rail 2 arranged in a linear array. The slider 3 and the slide rail 2 are connected to the limit holes 11 with internal threads. A knob 12 is fixedly connected to the outer surface of the bolt. Specifically, by rotating the knob 12, the bolt is rotated, causing the bolt to disengage from the inside of the limit hole 11, thereby releasing the limit on the slider 3 and the slide rail 2. Then, the position of the slider 3 in the slide rail 2 is adjusted so that the position between the two arc-shaped clamps 6 meets the requirements of throat masks of different diameters.

[0029] Furthermore, a support block 16 is fixedly connected to the top outer surface of the tester 1 at the center of the two sets of slide rails 2, and a tray 17 is fixedly connected to the top outer surface of the support block 16. Specifically, the laryngeal mask is placed on the tray 17, and the tray 17 supports the laryngeal mask.

[0030] Furthermore, two elastic bands 18 are fixedly connected to the outer surfaces of both the front and rear sides of the tray 17. The surfaces of the two elastic bands 18 are respectively provided with a hook and loop fastener and a hook and loop serrated fastener. Specifically, the laryngeal mask airway is placed on the tray 17, and the two elastic bands 18 are fixed by the hook and loop fastener and the hook and loop serrated fastener. Thus, the laryngeal mask airway is fixed on the tray 17 by the two elastic bands 18. When the laryngeal tube bends, the laryngeal tube itself bends around the fixed point of the edge of the tray 17.

[0031] Furthermore, a medical silicone pad is provided on the outer surface of the arc-shaped clamp 6. The surface of the medical silicone pad is frosted. Specifically, by providing a medical silicone pad and frosting its surface, both the deformation of the catheter caused by rigid clamping is avoided, and the clamping stability is enhanced by friction.

[0032] Furthermore, the inner curvature of the arc-shaped clamps 6 in the multiple fixing mechanisms is not consistent, specifically, so that the inner curvature of the arc-shaped clamps 6 matches the diameter and radius of curvature of common laryngeal mask tubes.

[0033] Furthermore, a washer is provided between the wing nut 10 and the fixing block 7. Specifically, by providing a washer between the wing nut 10 and the fixing block 7, the friction between the wing nut 10 and the fixing block 7 is increased.

[0034] Working principle: In use, the laryngeal mask to be tested is fixed. During fixing, the corresponding arc-shaped clamp 6 is selected according to the outer contour of the laryngeal mask. The two arc-shaped clamps 6 clamp the laryngeal mask tube. By loosening the knob 12, the bolt is released from the inside of the slider 3, and the limit between the slider 3 and the slide rail 2 is released, allowing the slider 3 to slide inside the slide rail 2. This adjusts the distance between the two arc-shaped clamps 6 to accommodate laryngeal masks of different diameters. Then, by screwing the bolt into the corresponding limiting hole 11, the slider 3 and the slide rail 2 are limited. During measurement, by loosening the wing nut 10, the wing nut 10 is released from the fixing block 7, reducing the friction between the wing nut 10 and the fixing block 7, allowing the rotating shaft 8 to rotate. This adjusts the angle of the other set of sliders 3, causing one end of the laryngeal mask to rotate, thus bending the laryngeal mask for bending test.

[0035] The following are the operating steps of the testing instrument:

[0036] Connect the device's power cord to the power outlet to turn on the power. Connect the gas supply, press the green power switch, the power indicator light will illuminate (press the green power switch again to turn off the device), the device will power on, the display screen will start up, and you will enter the startup interface;

[0037] Click the screen to enter the main page: the "Settings" button allows you to configure operating parameters;

[0038] The "Run" button can be used to start the experiment;

[0039] The "Stop" button can be used to stop the test;

[0040] The "Save" button can be used to initialize the air pressure difference value;

[0041] The "Timer" button can be used to time the throat pressure differential test;

[0042] The "Search" button allows you to enter data and print it.

[0043] The "Help" button provides process prompts;

[0044] The logo in the upper right corner of each sub-interface is used to return to the previous interface;

[0045] Before testing, the sample is subjected to temperature treatment according to standard requirements. Then, the sample is connected to the mold, but the sample is not connected to the air tube.

[0046] During the test, click the "Settings" button to enter the parameter settings screen and set the various parameters (test time and flow rate threshold):

[0047] The "Manual Valve" button allows for manual adjustment of the gas valve.

[0048] The "Communication Reset" button can reset communication data;

[0049] Click the "Run" button to perform the test. Once the flow rate reaches the set value and stabilizes, the green light will illuminate. Then, click the "Save" button.

[0050] Connect the air tube to the test sample, adjust the airflow rate to a stable value, and the green light will illuminate. Click the "Timer" button, and the test will end after the countdown ends.

[0051] If there is an auxiliary ventilation opening, perform a test on the auxiliary ventilation opening following the steps above.

[0052] Verify that this pressure difference does not exceed the pressure drop specified in the manufacturer's accompanying documentation, click the query button to fill in the test data and results, and print the test information.

[0053] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laryngeal mask bending resistance testing device, comprising a testing instrument (1), characterized in that: The top of the tester (1) is provided with multiple fixing mechanisms, including two sets of slide rails (2). Each set of slide rails (2) consists of two slide rails arranged symmetrically front and back. A slider (3) is slidably connected inside the slide rail (2). A telescopic rod is fixedly connected to the top outer surface of the slider (3). An arc-shaped clamp (6) is fixedly connected to the outer surface of the two telescopic rods with opposite movable ends. Two fixing blocks (7) are fixedly connected to the top outer surface of the tester (1). A rotating shaft (8) passes through the two fixing blocks (7). One set of slide rails (2) is fixedly sleeved on the outer surface of the rotating shaft (8). The outer surface of the rotating shaft (8) is provided with threaded teeth (9). A wing nut (10) is threaded on the outer surface of the threaded teeth (9). The wing nut (10) abuts against the surface of the fixing block (7).

2. The laryngeal mask bending resistance testing device according to claim 1, characterized in that: The telescopic rod includes a fixed rod (4) and a movable rod (5). The movable rod (5) is movably inserted inside the fixed rod (4). The outer surface of the movable rod (5) has a plurality of positioning holes (13) arranged in a linear array. The outer surface of the fixed rod (4) is movably inserted with a positioning rod (14). A pull plate is fixedly connected to the outer surface of the positioning rod (14). A spring (15) is fixedly connected between the pull plate and the fixed rod (4). The spring (15) is sleeved on the outside of the positioning rod (14). The other end of the positioning rod (14) is movably inserted inside one of the positioning holes (13).

3. The laryngeal mask bending resistance testing device according to claim 1, characterized in that: Limiting holes (11) are provided on the outer surfaces of both the slider (3) and the slide rail (2). There are several limiting holes (11) on the surface of the slide rail (2) arranged in a linear array. Bolts are threaded into the limiting holes (11) corresponding to the slider (3) and the slide rail (2). A knob (12) is fixedly connected to the outer surface of the bolt.

4. The laryngeal mask bending resistance testing device according to claim 1, characterized in that: The top outer surface of the tester (1) is fixedly connected to a support block (16) at the center of the two sets of slide rails (2), and the top outer surface of the support block (16) is fixedly connected to a tray (17).

5. The laryngeal mask bending resistance testing device according to claim 4, characterized in that: Two elastic bands (18) are fixedly connected to the outer surfaces of the front and rear sides of the tray (17), and the surfaces of the two elastic bands (18) are respectively provided with hook and loop fasteners and hook and loop fasteners.

6. The laryngeal mask bending resistance testing device according to claim 1, characterized in that: The outer surface of the arc-shaped clamp (6) is provided with a medical silicone pad, and the surface of the medical silicone pad is frosted.

7. The laryngeal mask bending resistance testing device according to claim 1, characterized in that: The inner curvature of the arc-shaped clamps (6) in the multiple fixing mechanisms is not consistent.

8. The laryngeal mask bending resistance testing device according to claim 1, characterized in that: A washer is provided between the wing nut (10) and the fixing block (7).

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