A visual evoked potential display device and stimulation system

Abstract

The utility model relates to the field of medical devices, and specifically to a visual evoked potential display device and a stimulation system. The visual evoked potential display device of the utility model includes a chassis and a display, a bracket is provided on the top of the chassis, the display is installed on the chassis through the bracket, the bracket includes a first connecting rod and a second connecting rod, the first connecting rod is fixedly connected to the chassis, one end of the second connecting rod is connected to the first connecting rod, and the other end of the second connecting rod is connected to the display, and a pulley is provided at the bottom of the chassis. By setting the pulley on the chassis, the movement of the device is achieved to achieve the purpose of preliminarily adjusting the horizontal distance between the subject's eyeball and the screen; the visual evoked potential stimulation system of the utility model includes a pattern stimulation device for generating a black and white checkerboard flip pattern; a visual evoked potential display device for displaying the black and white checkerboard flip pattern generated by the pattern stimulation device; glasses are used to cover non-tested eyes, thereby improving the convenience of visual evoked potential detection.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a visual evoked potential display device and a stimulation system. Background Art

[0002] Visual evoked cortical potentials (VEP) are the potentials generated in the occipital visual cortex after the retina is stimulated by flashes or patterns. The visual potentials induced by flash stimulation vary greatly, while the visual potentials induced by switching between black and white checkered patterns and white and black checkered patterns of the same shape (checkerboard pattern flip stimulation) are stable and have small individual differences. Therefore, checkerboard pattern flip stimulation has gradually become a commonly used clinical method for detecting visual evoked potentials.

[0003] The traditional visual evoked potential detection equipment is to place a liquid crystal display on a desktop or a trolley, and then connect the liquid crystal display to the pattern stimulation device with a wire. During the test, the subject looks at a fixed position of the display (usually the central red dot of the screen), and the pattern stimulation device flips the black and white checkerboard of the display through a specific program, thereby stimulating the retinal visual neuron cells of the subject, and recording the potential changes of the subject's visual cortex at the projection position of the brain surface of the visual cortex. This detection method is usually carried out in a fixed detection environment. During the examination, the subject's eyes need to be at the same height as the center of the stimulation screen, keep level, and the line of sight is perpendicular to the screen. The distance between the eyes and the center of the screen is 70-100 cm. However, many hospitalized subjects are seriously ill and have limb weakness. They need to be sent to the examination room by lathe. They cannot sit independently on a chair during the examination, resulting in the inability to complete the examination. Limited by the fixed position and angle of the equipment, traditional visual evoked potential detection equipment is difficult to flexibly adapt to the detection needs of different subjects, especially bedridden or immobile subjects, which may cause the test results to be greatly affected.

[0004] At present, some visual evoked potential detection devices on the market are equipped with adjustable brackets, but most of them are limited to simple adjustment of the height and tilt angle of the display, and cannot fully meet the requirements of accurate matching of the distance and angle between the eyeballs and the screen of different body positions, different heights, and special cases such as bedridden subjects. CN 214907094U discloses a portable display device for visual evoked potential inspection, including a bracket and a display; the bracket includes a display fixing frame and four supporting feet, two supporting feet are respectively fixed on both sides of the display fixing frame, and the two supporting feet on each side are at a certain angle. This portable display device for visual evoked potential inspection adjusts the height of the display through two supporting feet, and has the following disadvantages when used: when used for bedridden subjects, it needs to be supported on the bed, and generally there are quilts and monitoring instruments (such as electrocardiogram monitors, infusion pumps, etc.) on the bed of seriously ill subjects, so the placement position is limited, and the bed surface is generally soft, so it is difficult to keep it stable after placement. Utility Model Content

[0005] In response to the technical problems existing in the prior art, the first purpose of the utility model is to provide a visual evoked potential display device, which can freely adjust the height and angle of the display so that the display is convenient enough for the subject to undergo visual evoked potential detection in a standing, sitting or bed-ridden state, thereby meeting the usage needs of various subjects.

[0006] The second purpose of the utility model is to provide a visual evoked potential stimulation system, which improves the convenience and accuracy of visual evoked potential detection and adapts to diversified clinical application scenarios. In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A visual evoked potential display device comprises a chassis and a display. A bracket is provided on the top of the chassis, and the display is mounted on the chassis through the bracket. The bracket comprises a first connecting rod and a second connecting rod. The first connecting rod is fixedly connected to the chassis, one end of the second connecting rod is connected to the first connecting rod, and the other end of the second connecting rod is connected to the display. A pulley is provided at the bottom of the chassis.

[0008] As a preferred embodiment, a brake assembly is also provided on the pulley.

[0009] As a preference, both the first connecting rod and the second connecting rod are retractable structures.

[0010] As a preference, the second connecting rod is movably connected to the display.

[0011] As a preference, it also includes an angle adjustment device, which includes a first connecting member and a second connecting member, the first connecting member is arranged at the end of the second connecting rod or the back of the display, and the second connecting member is correspondingly arranged on the back of the display or the end of the second connecting rod, and the first connecting member is rotatably connected to the second connecting member.

[0012] Preferably, the angle adjustment device further comprises a locking member for limiting relative rotation between the first connecting member and the second connecting member.

[0013] A visual evoked potential stimulation system,

[0014] A pattern stimulation device is included for generating a black and white checkerboard flipping pattern;

[0015] A visual evoked potential display device, used to display the black and white checkerboard flipping pattern generated by the pattern stimulation device;

[0016] Glasses to cover the eye not being examined.

[0017] As a preferred embodiment, the visual evoked potential display device further comprises a storage rack, which is placed on the top of the chassis.

[0018] As a preference, the first connecting rod and the second connecting rod are both hollow rods.

[0019] As a preferred embodiment, the glasses include two frames connected by a nose bridge, slots are provided on the frames, and temples are provided on the sides of the frames.

[0020] In general, the utility model has the following advantages:

[0021] 1. The utility model realizes the movement of the device by arranging a pulley on the chassis, so as to achieve the purpose of preliminarily adjusting the horizontal distance between the subject's eyeball and the screen.

[0022] 2. The utility model effectively prevents the chassis from moving the display due to a slope, uneven ground or other emergency situations by arranging a brake assembly on the pulley, thereby ensuring that the display remains stable when the subject is performing visual evoked potential testing, effectively avoiding affecting the test results.

[0023] 3. The first connecting rod and the second connecting rod of the utility model adopt a retractable structure. The height of the first connecting rod can be adjusted and the length of the second connecting rod can be adjusted according to the height or sitting posture of different subjects, so as to further adjust the horizontal distance between the subject's eyeball and the screen, and ensure that the distance between the subject's eyes and the display can reach the most suitable detection state when the subject is standing or sitting; and whether it is a child, an adult or a subject of a special body shape, they can find the most suitable detection position for them by adjusting the first connecting rod and the second connecting rod, thereby improving the versatility and adaptability of the device in clinical practice; when not in use, the first connecting rod and the second connecting rod can be retracted to the minimum size, occupying less space and facilitating the storage of the equipment.

[0024] 4. The second connecting rod of the utility model is hinged with the display, and the display can rotate around the connection end between the second connecting rod and the display, so as to adjust the tilt angle between the subject's eyeball and the screen and realize the angle adjustment of the display.

[0025] 5. The utility model adopts a ball hinge as an angle adjustment device to realize the hinge connection between the display and the second connecting rod, so that the display can be flipped 360 degrees around the second connecting rod, so that the device can be accurately adjusted according to the height or sitting and lying posture of different subjects, ensuring that the angle between the eyes and the display can reach the most suitable detection state when the subject is standing, sitting, lying or semi-lying.

[0026] 6. The angle adjustment device of the utility model adopts a bolt as a locking member to limit the relative rotation between the display and the second connecting rod, and can fix the display at a desired angle to ensure the stability of the display during the detection process.

[0027] 7. The visual evoked potential display device of the utility model is additionally provided with a storage rack for storing the mode stimulation device, integrating the components of the visual evoked potential stimulation system into one, freeing up desktop space and improving the efficiency of space utilization. It can also be separated from different types of medical equipment for easy taking and use, while reducing dust accumulation and facilitating daily cleaning.

[0028] 8. The first connecting rod and the second connecting rod of the utility model adopt a hollow structure, which can hide and store the display power line, signal line and the cable connected to the pattern stimulation device, making the appearance of the visual evoked potential display device neater and avoiding safety hazards caused by messy cables. It also helps to protect the wires from wear or physical damage.

[0029] 9. The glasses configured in the visual evoked potential stimulation system of the present invention can prevent the non-examined eye from being affected by the examination result due to the subject's upper limb weakness or other subjective and objective factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a visual evoked potential stimulation system in an embodiment of the utility model;

[0031] Figure 2 It is a structural schematic diagram of a visual evoked potential display device in an embodiment of the utility model;

[0032] Figure 3 yes Figure 2 An enlarged schematic diagram of point A;

[0033] Figure 4 It is a structural schematic diagram of the angle adjustment device in the embodiment of the utility model;

[0034] Figure 5 yes Figure 2 An enlarged schematic diagram of point B;

[0035] Figure 6 It is a structural schematic diagram of glasses in an embodiment of the utility model;

[0036] Among them: 1: chassis, 2: display, 3: pulley, 4: bracket, 41: first connecting rod, 42: second connecting rod, 5: angle adjustment device, 51: first connecting piece, 52: second connecting piece, 53: locking piece, 6: mode stimulation device, 7: glasses, 71: nose bridge, 72: frame, 73: slot, 74: temple, 8: storage rack, 9: wires, 10, wiring port. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] like Figure 1 and Figure 2 As shown, a visual evoked potential display device includes a chassis and a display. A bracket is provided on the top of the chassis, and the display is installed on the chassis through the bracket. The bracket includes a first connecting rod and a second connecting rod. The first connecting rod is fixedly connected to the chassis, one end of the second connecting rod is connected to the first connecting rod, and the other end of the second connecting rod is connected to the display. A pulley is provided at the bottom of the chassis.

[0039] The display is mounted on the top of the chassis through a bracket, and a pulley is installed at the bottom of the chassis, so that the device can be moved as a whole, and the distance between the display and the subject is conveniently adjusted, so as to achieve the purpose of adjusting the horizontal distance between the subject's eyeball and the screen, and realize the preliminary position adjustment of the display. The pulley of this embodiment adopts a universal wheel, and the visual evoked potential display device can change the direction of travel very easily when moving, and can show extremely high flexibility in narrow spaces or complex paths. In addition, when pushing and pulling the visual evoked potential display device, the user can save the effort of frequently adjusting the direction, reducing the labor intensity.

[0040] Preferably, the pulley is also provided with a brake assembly. The pulley can be locked by the brake assembly to stop the pulley from rolling and turning, thereby effectively preventing the chassis from driving the display to move.

[0041] As a preferred implementation manner, both the first connecting rod and the second connecting rod are retractable structures.

[0042] Among them, the retractable structure can be set in a variety of ways, as long as the first connecting rod can achieve height adjustment and the second connecting rod can achieve length adjustment. The retractable structure can adopt commonly used retractable structures such as multi-stage retractable rods. Technical personnel in this field can flexibly select them according to their needs. The structure is well known to technical personnel in this field and will not be described in detail here.

[0043] like Figure 3 and Figure 4 As shown, as a preferred embodiment, the second connecting rod is movably connected to the display. Specifically, the second connecting rod is hinged to the display.

[0044] Preferably, the visual evoked potential display device further comprises an angle adjustment device, the angle adjustment device comprises a first connecting member and a second connecting member, the first connecting member is arranged at the end of the second connecting rod or the back of the display, the second connecting member is correspondingly arranged at the back of the display or the end of the second connecting rod, the first connecting member is rotatably connected to the second connecting member. The angle adjustment device further comprises a locking member for limiting the relative rotation of the first connecting member and the second connecting member.

[0045] The first connecting member of this embodiment is a ball pin, and the second connecting member is a ball shell. The ball shell is sleeved on the outer wall of the ball pin, and the ball pin rotates relatively in the ball shell, thereby realizing the relative rotation between the display and the second connecting rod. The angle adjustment device can be set in a variety of ways, as long as it can enable the display to be flipped 360 degrees around the connecting end of the display. Those skilled in the art can flexibly select a common universal joint structure such as a ball hinge according to their needs. The structure is well known to those skilled in the art and will not be described in detail here.

[0046] The locking member is a bolt, and a threaded hole adapted to the bolt is provided on the ball shell. By threading the bolt to the threaded hole on the ball shell, when the bolt is tightened, the end of the bolt can press the ball pin against the ball shell, thereby limiting the relative rotation between the ball pin and the ball shell, thereby limiting the relative rotation between the display and the second connecting rod. The locking member can be set in a variety of ways, as long as it can limit the relative rotation between the display and the second connecting rod. Those skilled in the art can flexibly select common locking structures such as bolts according to their needs. The structure is well known to those skilled in the art and will not be described in detail here.

[0047] A visual evoked potential stimulation system comprises a pattern stimulation device for generating a black and white chessboard flip pattern; a visual evoked potential display device for displaying the black and white chessboard flip pattern generated by the pattern stimulation device; and glasses for shielding a non-tested eye.

[0048] The pattern stimulation device of this embodiment is electrically connected to the display screen through wires, and the black and white checkerboard flip pattern generated by the pattern stimulation device is displayed on the display screen.

[0049] As a preferred embodiment, the visual evoked potential display device further comprises a shelf, which is placed on the top of the chassis. The shape and size of the shelf in this embodiment are adapted to the pattern stimulation device, and the pattern stimulation device can be placed in the shelf.

[0050] like Figure 5 As shown, preferably, the first connecting rod and the second connecting rod are both hollow structures. The first connecting rod and the second connecting rod of this embodiment are both provided with wiring ports, and the corresponding first connecting rod and the second connecting rod are also provided with wiring ports on the storage rack. The cable connecting the display and the pattern stimulation device passes through the first connecting rod and the second connecting rod through the wiring port and is connected to the pattern stimulation device located in the storage rack, and the power cord and the signal cord of the display are hidden in the first connecting rod and the second connecting rod.

[0051] like Figure 6 As shown, as a preferred embodiment, the glasses include two frames connected by a nose bridge, slots are provided on the frames, and temples are provided on the sides of the frames.

[0052] Lenses of different degrees or baffles can be inserted in the middle of the frame through the slot. When the examinee is tested, he puts on the glasses, inserts a lens of appropriate degree on the side of the eye to be tested to correct vision, and inserts a baffle on the side of the non-eye to play a shielding role.

[0053] The use of the utility model:

[0054] Testing subjects who can move freely: have the subjects sit on a chair in front of the visual evoked potential display device, wear glasses, insert a lens of appropriate degree on the side of the eye to be tested, and insert a baffle on the side of the eye not to be tested. According to the height of the subject, adjust the height of the first connecting rod to the height at which the subject can look straight at the screen. Adjust the angle of the display so that the screen is perpendicular to the horizontal plane and parallel to the vertical plane, so that the subject's line of sight is perpendicular to the screen. Move the visual evoked potential display device, adjust the horizontal distance between the display and the subject, so that the horizontal distance between the eye to be tested and the screen is 75 cm, lock the pulley, and start testing.

[0055] Testing subjects in wheelchairs: move the visual evoked potential display device to the front of the subject's wheelchair, wear glasses, insert a lens of appropriate degree on the side of the eye to be tested, and insert a baffle on the side of the eye not to be tested. According to the height of the subject, adjust the height of the first connecting rod to the height of the subject's eye level with the screen, adjust the angle of the display so that the screen is perpendicular to the horizontal plane and parallel to the vertical plane, so that the subject's line of sight is perpendicular to the screen, move the visual evoked potential display device, adjust the horizontal distance between the display and the subject, so that the horizontal distance between the eye to be tested and the screen is 75 cm, lock the pulley and start testing.

[0056] Testing bedridden subjects: move the visual evoked potential display device to the front of the subject's bed, wear glasses, insert a lens of appropriate degree on the side of the eye to be tested, insert a baffle on the side of the eye not to be tested, adjust the angle of the display so that the screen is parallel to the horizontal plane and perpendicular to the vertical plane, and make the subject's line of sight perpendicular to the screen. According to the distance between the subject and the bed, adjust the length of the second connecting rod so that the subject's line of sight is perpendicular to the screen. Adjust the height of the first connecting rod so that the distance between the eye to be tested and the center of the screen is 75 cm. Lock the pulley and start testing.

[0057] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A visual evoked potential display device, characterized in that: It includes a chassis and a display. A bracket is provided on the top of the chassis. The display is installed on the chassis through the bracket. The bracket includes a first connecting rod and a second connecting rod. The first connecting rod is fixedly connected to the chassis, one end of the second connecting rod is connected to the first connecting rod, and the other end of the second connecting rod is connected to the display. A pulley is provided at the bottom of the chassis.

2. A visual evoked potential display device according to claim 1, characterized in that: The pulley is also provided with a brake assembly.

3. A visual evoked potential display device according to claim 1, characterized in that: The first connecting rod and the second connecting rod are both retractable structures.

4. A visual evoked potential display device according to claim 1, characterized in that: The second connecting rod is movably connected to the display.

5. A visual evoked potential display device according to claim 4, characterized in that: It also includes an angle adjustment device, which includes a first connecting member and a second connecting member. The first connecting member is arranged at the end of the second connecting rod or the back of the display, and the second connecting member is correspondingly arranged on the back of the display or the end of the second connecting rod. The first connecting member is rotatably connected to the second connecting member.

6. A visual evoked potential display device according to claim 5, characterized in that: The angle adjustment device also includes a locking member for limiting relative rotation between the first connecting member and the second connecting member.

7. A visual evoked potential stimulation system, characterized in that: A pattern stimulation device is included for generating a black and white checkerboard flipping pattern; The visual evoked potential display device according to any one of claims 1 to 6, used for displaying the black and white checkerboard flip pattern generated by the pattern stimulation device; Glasses to cover the eye not being examined.

8. A visual evoked potential stimulation system according to claim 7, characterized in that: The visual evoked potential display device also includes a storage rack, which is placed on the top of the chassis.

9. A visual evoked potential stimulation system according to claim 8, characterized in that: The first connecting rod and the second connecting rod are both hollow rods.

10. A visual evoked potential stimulation system according to claim 7, characterized in that: The glasses include two frames connected by a nose bridge, slots are arranged on the frames, and temples are arranged on the sides of the frames.

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