A device for measuring the axial rotation angle of head and neck

Abstract

The invention discloses a head and neck axial rotation angle measuring device, comprising: a fixed plate, a protractor, a rotating benchmark, and a benchmark free rod; the protractor is vertically arranged at the top of the fixed plate; the rotating benchmark is fixed on the fixed plate, and the rotating axis of the rotating benchmark is connected to the measuring center point in the protractor; one end of the benchmark free rod is arranged at the connection between the rotating benchmark and the measuring center point; a vertical chain is hung on the other end of the benchmark free rod; and the benchmark free rod is parallel to the plane where the protractor is located; and a plumb line is connected to the other end of the vertical chain. The subject rotates the head and neck axially, and the vertical chain hung on the benchmark free rod is overlapped with the subject's nose tip, so as to obtain the axial rotation angle of the subject's head and neck. The operation is simple and harmless to the subject, thereby improving the convenience of measurement; the subject is less affected by the operator's subjective influence, so that the measurement result is more accurate.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a device for measuring the axial rotation angle of a head and neck. Background Art

[0002] With the development of society, people's living standards are constantly improving, and more and more people are paying attention to their physical health. The cervical spine refers to the cervical vertebrae, which are located below the head and above the thoracic spine. The cervical spine not only supports the weight of the head, but also has a large range of motion. With age, the lower cervical spine is prone to degenerative changes, mainly manifested by thinning of the intervertebral disc, narrowing of the intervertebral space, and smaller intervertebral foramen. At the same time, bone spurs are prone to grow on the edges of the vertebrae, compressing the roots of the spinal nerves and causing cervical spondylosis. In daily life, the most frequent movement of the head and neck is axial rotation. When checking whether the head and neck are healthy, it is often necessary to measure the rotation angle of the head and neck. There are two specific measurement methods: one is to use a limb angle ruler placed on the top of the person's head, and the measurer visually measures the angle of the nose tip deviating from the median plane of the human body; the other is to use X-ray tomography (CT) to measure the left and right axial rotation angles of the head respectively.

[0003] However, the traditional visual measurement method of the axial rotation angle of the head and neck is easy to operate, but it is subject to significant subjective influence and inaccurate measurement; while CT measurement is accurate, it is complex to operate, expensive, and the person being measured is exposed to a certain dose of radiation. Summary of the Invention

[0004] In view of the above problems, it is necessary to provide a head and neck axial rotation angle measuring device that is easy to use and can improve measurement accuracy.

[0005] A device for measuring the axial rotation angle of the head and neck comprises a fixed plate, a protractor, a rotating standard rod, and a standard rod free rod; the protractor is vertically arranged at the top of the fixed plate; the rotating standard rod is fixed to the fixed plate, and the rotation axis of the rotating standard rod is connected to the measurement center point in the protractor; one end of the standard rod free rod is arranged at the connection between the rotating standard rod and the measurement center point; a vertical chain is hung on the other end of the standard rod free rod; the standard rod free rod is parallel to the plane where the protractor is located; and a plumb line is connected to the other end of the vertical chain.

[0006] In one embodiment, the fixing plate is fixed on a wall; the protractor is perpendicular to the wall; and the plane where the protractor is located is parallel to the ground.

[0007] In one embodiment, the benchmark free rod is a cylinder; the benchmark free rod is a telescopic rod; and is used to control the vertical chain to extend and retract along the direction of the benchmark free rod.

[0008] In one embodiment, the free rod of the benchmark is provided with a protrusion and a groove corresponding to the protrusion; the groove is engaged with the protrusion.

[0009] In one embodiment, the benchmark free rod is an internal hollow structure; a through hole is provided on the benchmark free rod, and the through hole is used for the vertical chain to pass through.

[0010] In one embodiment, one end of the vertical chain is connected to the tail end of the free rod of the benchmark through the through hole.

[0011] In one embodiment, a buckle is provided at the tail end of the free rod of the benchmark; the buckle is used to fix one end of the vertical chain to the tail end of the free rod of the benchmark.

[0012] In one embodiment, the vertical chain connected to the plumb line is oriented vertically downward in a natural state.

[0013] The above-mentioned head and neck axial rotation angle measuring device includes a fixed plate, a protractor, a rotating standard rod, and a standard rod free rod; the protractor is vertically arranged at the top of the fixed plate; the rotating standard rod is fixed to the fixed plate, and the rotation axis of the rotating standard rod is connected to the measurement center point in the protractor; one end of the standard rod free rod is arranged at the connection between the rotating standard rod and the measurement center point; a vertical chain is hung on the other end of the standard rod free rod; and the standard rod free rod is parallel to the plane where the protractor is located; the other end of the vertical chain is connected to a plumb line. The subject rotates the head and neck axially, and the vertical chain hanging on the standard rod free rod is aligned with the subject's nose tip to obtain the axial rotation angle of the subject's head and neck. The operation is simple and harmless to the subject, which improves the convenience of measurement; and the subject is less affected by the operator's subjective influence, making the measurement result more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 2. It is a structural diagram of a head and neck axial rotation angle measuring device in one embodiment;

[0015] Figure 2 for Figure 1 Schematic diagram of the connection position of the free pole 400 of the benchmark, the vertical chain 410, and the plumb line 420 in the structure shown;

[0016] Figure 3 Schematic diagram of the connection position of the benchmark free rod 400, the vertical chain 410, and the plumb line 420 in one embodiment. DETAILED DESCRIPTION

[0017] In order to better understand the present invention, the content of the present invention is further explained below with reference to the accompanying drawings and embodiments, but the present invention is not limited to the following embodiments.

[0018] In one embodiment, Figure 1As shown, the present invention provides a head and neck axial rotation angle measuring device, which mainly includes: a fixed plate 100, a protractor 200, a rotating benchmark 300, and a benchmark free rod 400; the protractor 200 is vertically arranged at the top of the fixed plate 100; the rotating benchmark 300 is fixed on the fixed plate 100, and the rotating axis 310 of the rotating benchmark 300 is connected to the measurement center point in the protractor 200; one end of the benchmark free rod 400 is arranged at the connection between the rotating benchmark 300 and the measurement center point; a vertical chain 410 is hung on the other end of the benchmark free rod 400; and the benchmark free rod 400 is parallel to the plane where the protractor 200 is located; the other end of the vertical chain 410 is connected to a plumb bob 420.

[0019] The fixing plate 100 can be a thick wooden board, a thick iron plate, or other materials, and is not limited here. Specifically, the thickness of the fixing plate 100 can be 1 cm, 2 cm, etc. The fixing plate 100 can be fixedly placed on the wall, and the fixing plate 100 can be fixed to the wall at a height of 1 meter to 2 meters.

[0020] The protractor 200 may be disposed on the top of the fixing plate 100 . Specifically, the plane of the protractor 200 may be perpendicular to the plane of the fixing plate 100 , that is, the plane of the protractor 200 may be perpendicular to the wall.

[0021] The rotating rod 300 can be fixedly mounted on the fixed plate 100 and can be parallel to the plane of the fixed plate 100. The rotating rod 300 is provided with a rotating shaft 310, which can be connected to the measurement center point of the protractor 200. Specifically, the rotating shaft 310 can pass through the measurement center point of the protractor 200.

[0022] One end of the free rod 400 is disposed at the connection between the rotating rod 300 and the measurement center point. Specifically, one end of the free rod 400 can be connected to the rotation axis 310, and the free rod 400 is parallel to the plane where the protractor 200 is located. The free rod 400 can rotate around the rotation axis 310. In this embodiment, a vertical chain 410 is suspended from the other end of the free rod 400, wherein the vertical chain 410 can be a thin line, and the other end of the vertical chain 410 is connected to a plumb line 420.

[0023] In this embodiment, the axial rotation angle of the subject's head and neck is obtained by aligning the vertical chain 410 hanging from the free rod 400 of the benchmark with the tip of the subject's nose. The operation is simple and harmless to the subject, thereby improving the convenience of measurement; and the subject is less affected by the subjective influence of the operator, making the measurement result more accurate.

[0024] In one embodiment, the fixing plate can be fixed on a wall; the protractor is perpendicular to the wall; and the plane where the protractor is located is parallel to the ground.

[0025] like Figure 2 As shown, in one embodiment, the free rod 400 of the benchmark is a cylinder; the free rod 400 of the benchmark is a telescopic rod; and it is used to control the vertical chain 410 to extend and retract along the direction of the free rod 400 of the benchmark. Figure 2 The free rod 400 of the benchmark is provided with a protrusion 402 and a groove 404 corresponding to the protrusion 402; the groove 404 is engaged with the protrusion 402. Specifically, the free rod 400 of the benchmark can be provided with multiple protrusions 402 and multiple grooves 404 corresponding to the multiple protrusions 402 respectively. By adjusting the engaging position of the grooves 404 and the protrusions 402, the length of the free rod 400 of the benchmark can be adjusted.

[0026] In one embodiment, Figure 3 As shown, the free-standing rod 400 is hollow internally; a through-hole 406 is provided on the free-standing rod 400 for a vertical chain 410 to pass through. In one embodiment, one end of the vertical chain 410 is connected to the rear end of the free-standing rod 400 via the through-hole 406. In one embodiment, a buckle 408 is provided at the rear end of the free-standing rod 400; the buckle 408 is used to secure one end of the vertical chain 410 to the rear end of the free-standing rod 400. Specifically, the length of the vertical chain 410 can be adjusted by adjusting the position of the vertical chain 410 secured to the rear end of the free-standing rod 400.

[0027] In one embodiment, the vertical chain connected to the plumb line is oriented vertically downward in a natural state.

[0028] The method of using the head and neck axial rotation angle measuring device provided by the present invention is as follows:

[0029] 1. The person being measured sits under the protractor with their back and headrest pressed against the wall, and the midplane of their body coincides with the axis of rotation of the rotating rod.

[0030] 2. The person being measured should keep his shoulders still and turn his head to the left as much as possible; adjust the length of the free rod of the benchmark and the length of the vertical chain.

[0031] 3. Rotate the free rod of the benchmark and adjust the hanging point of the vertical chain so that the vertical chain remains vertical and coincides with the tip of the nose of the person being measured; read the angle of the free rod of the benchmark on the protractor and record it as the left-hand angle.

[0032] 4. The person being measured rotates their head to the right, repeats step 3, and records the right rotation angle.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A head and neck axial rotation angle measuring device, characterized in that: It comprises a fixed plate, a protractor, a rotating benchmark and a benchmark free rod; the protractor is vertically arranged at the top of the fixed plate; the rotating benchmark is fixed on the fixed plate, and the rotating axis of the rotating benchmark is connected to the measuring center point in the protractor; one end of the benchmark free rod is arranged at the connection between the rotating benchmark and the measuring center point; a vertical chain is hung on the other end of the benchmark free rod; the benchmark free rod is parallel to the plane where the protractor is located; a plumb line is connected to the other end of the vertical chain; the fixed plate is fixed on the wall; the protractor is vertical to the wall; and the plane where the protractor is located is parallel to the ground; the benchmark free rod is a cylinder; the benchmark free rod is a telescopic rod; used to control the telescopic movement of the vertical chain along the direction of the benchmark free rod.

2. The head and neck axial rotation angle measuring device according to claim 1, characterized in that: The free rod of the benchmark is provided with a protrusion and a groove corresponding to the protrusion; the groove is clamped with the protrusion.

3. The head and neck axial rotation angle measuring device according to claim 1, characterized in that: The free rod of the benchmark pole is an internal hollow structure; the free rod of the benchmark pole is provided with a through hole, and the through hole is used for the vertical chain to pass through.

4. The head and neck axial rotation angle measuring device according to claim 3, characterized in that: One end of the vertical chain is connected to the tail end of the free rod of the benchmark through the through hole.

5. The head and neck axial rotation angle measuring device according to claim 4, characterized in that: The tail end of the free rod of the benchmark is provided with a buckle; the buckle is used to fix one end of the vertical chain to the tail end of the free rod of the benchmark.

6. The head and neck axial rotation angle measuring device according to claim 1, characterized in that: The vertical chain connected with the plumb line is oriented vertically downward in a natural state.

Images