CN214965577U

CN214965577U - Measuring scale for evaluating scoliosis degree Cobb angle

Info

Publication number: CN214965577U
Application number: CN202120497489.3U
Authority: CN
Inventors: 王艳; 徐芙蓉; 赵硕峰; 蒋云峰; 张娟; 王智运; 邹梓豪
Original assignee: Wenzhou Medical University
Current assignee: Wenzhou Medical University
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-12-03
Anticipated expiration: 2031-03-09

Abstract

The utility model discloses a measuring scale for evaluating the Cobb angle of the scoliosis degree, which comprises a ruler body as a main body, an angle collector, a data processor, a key, a display and a battery, wherein the angle collector, the data processor, the key, the display and the battery are arranged on the ruler body; the angle collector comprises a triaxial acceleration sensor and a triaxial gyroscope element, the axial centers of the triaxial acceleration sensor and the triaxial gyroscope are overlapped, and the geometric center of the angle collector is the center of three axes; the angle collector is fixedly arranged on the right side of the ruler body, and the X-axis direction of the angle collector is parallel to the upper edge of the ruler body; and the angle data signal acquired by the angle acquisition unit is input into the data processor to acquire a Cobb angle and output to the display for display. Compared with the prior standard Cobb angle measurement method, the measuring scale of the utility model has the advantages that the measurement precision is obviously improved, and the use is more convenient; and the operation is simple and easy, and the application range is wide.

Description

Measuring scale for evaluating scoliosis degree Cobb angle

Technical Field

The utility model relates to a measure medical instrument at Cobb angle, concretely relates to intelligent measurement chi of Cobb angle in can direct rapid survey backbone lateral curvature X line image.

Background

The current standard Cobb angle measurement method, as shown in fig. 1, is to draw a final plate line 4 and 6 on the upper edge 3 of the upper vertebra and the lower edge 5 of the lower vertebra of the lateral curvature of the spine, and then draw perpendicular lines 7 and 8 of the final plate line 4 and 6, so as to obtain an included angle X between the perpendicular lines 7 and 8, and the Cobb angle can be indirectly obtained through the included angle: the Cobb angle is 180-X degrees. Although the method is simple, the method has the limitations that a plurality of auxiliary lines need to be drawn and X-ray films need to be stained, and the time is consumed in specific application occasions; in addition, when the X-ray film is displayed on a computer screen or a portable panel device, the method is not suitable for measurement; secondly, the method can also affect the measurement accuracy because of the thickness of the pen point and the verticality of the drawn auxiliary line. The accuracy of the Cobb angle measurement is high clinically, and the method brings additional errors which reach 8 degrees in past clinical investigation and are unacceptable when the scoliosis is clinically evaluated. At present, a part of large hospitals directly measure the Cobb angle in an X-ray image by using software for measuring the Cobb angle, but the method needs a skilled professional person, and in addition, the method cannot be used for printed X-ray films, and the practical application range is narrow.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an aassessment backbone lateral curvature degree Cobb angular surveying chi has the measurement accuracy and the convenient degree of use of measuring the Cobb angle concurrently.

In order to achieve the purpose, the utility model takes the following measures:

a measuring ruler for estimating the Cobb angle of scoliosis, characterized in that: comprises a ruler body as a main body, an angle collector, a data processor, a key, a display and a battery, wherein the angle collector, the data processor, the key, the display and the battery are arranged on the ruler body; the battery is used for providing working voltage for the angle collector, the data processor and the display; the key is used for triggering the angle collector and the data processor to work;

the angle collector comprises a triaxial acceleration sensor and a triaxial gyroscope element, the axial centers of the triaxial acceleration sensor and the triaxial gyroscope are overlapped, and the geometric center of the angle collector is the center of three axes; the angle collector is fixedly arranged on the right side of the ruler body, and the X-axis direction of the angle collector is parallel to the upper edge of the ruler body; the angle collector is used for acquiring a deflection angle theta of the ruler body in the vertical direction, a rotation angle gamma of the ruler body around a central line and a deflection angle psi of the ruler body in the horizontal direction; and the angle data signal acquired by the angle acquisition unit is input into the data processor to obtain a Cobb angle, and the Cobb angle is output to the display for display.

The key is arranged at the rightmost side of the straight ruler body so as to be convenient to operate.

The power supply is a solar cell or a button cell, and the specific capacity is determined according to the total power consumption of the measuring scale.

The solar cell panel is close to the left edge of the ruler body, so that the influence of fingers on the light acceptance rate in operation is avoided.

The display is arranged on the right part of the front side of the straight ruler body in the middle and is close to the lower edge, and the habit of observing data by human eyes when the right hand is mainly operated in the measuring process is achieved; when the numerical value is updated, the numerical value is easy to observe.

The back of the ruler body is a smooth surface.

And the upper edge of the ruler body is provided with scale marks and scales.

The utility model discloses a dipperstick application method: firstly, determining an upper vertebra and a lower vertebra of scoliosis; and then, the upper edge line of the measuring scale is respectively superposed with the upper edge of the upper vertebra and the lower edge of the lower vertebra, and the key is pressed for confirmation, so that the degree of the Cobb angle can be displayed on a display, and the measurement is finished. The Cobb angle can be measured using a measuring ruler when the target of measurement (i.e., the X-ray film or the display carrying the electronic X-ray film) is in a horizontal or vertical position.

The utility model discloses a working principle of dipperstick: the angle collector first obtains a deflection angle theta of the ruler in the vertical direction, a rotation angle gamma of the ruler around the center line and a deflection angle psi of the ruler in the horizontal direction. In order to obtain the Cobb angle, the γ angle obtained at each measurement is used as a reference at the time of data processing, that is, the γ angle can be maintained at 0 degree each time. After ψ 1 and ψ 2 and θ 1 and θ 2 of two straight lines are obtained, the difference Δ ψ 2- ψ 1 and Δ θ 2- θ 1 are obtained. As shown in fig. 2, when one line is regarded as the X-axis of the rectangular coordinate system in the same horizontal plane, the other line can be regarded as the straight line of the coordinate system with Δ ψ as the new deflection angle in the horizontal direction after update and Δ θ as the new deflection angle in the vertical direction after update, and the Cobb angle degree is δ_CobbArccos (cos (Δ ψ) × cos (Δ θ)). As long as the Cobb angle measuring unit and the straight line to be measured are kept parallel and consistent and do not need to be superposed, the Cobb angle and the included angle between two non-intersecting straight lines can be obtained according to the formula.

The utility model has the advantages that:

the measuring scale of the utility model adopts the angle collector and the data processor to carry out measurement and data processing, compared with the existing standard Cobb angle measuring method, the measuring precision is obviously improved, and the use is more convenient; and the method has the operation simplicity of the existing method, does not need early training and has wide applicable population.

The utility model discloses a dipperstick can be applied to the X-ray piece and carry on electron X-ray piece flat board or display, and the range of application is wide.

The utility model discloses a dipperstick simple structure, manufacturing cost and use cost are lower, easily promote to the medical institution of different grades.

Drawings

The invention is further illustrated by the following figures.

FIG. 1 is a schematic diagram of a prior art Cobb goniometry method;

FIG. 2 is a schematic view of measured lines and angles in a coordinate system;

figure 3 is a front view of the measuring ruler in the example.

Reference numerals: 1-superior vertebra; 2-inferior vertebra; 3-superior border of superior vertebra; 4-a final plate line; 5-lower edge of inferior vertebra; 6-a final plate line; 7-vertical line; 8-vertical line; 9-a ruler body; 10-angle collector; 11-a display; 12-a data processor; 13-a battery; 14-a key; 15-key press; 16-key.

Detailed Description

The present invention will be further described with reference to the following specific examples.

As shown in fig. 3, the measuring ruler for evaluating the scoliosis Cobb angle of the present invention is composed of a ruler body 9 as a main body, an angle collector 10 fixed on the ruler body, a data processor 12, a display 11, a battery 13, and buttons 14, 15 and 16.

The angle collector 10 is a chip made of an MEMS micro-electro-mechanical system, and may specifically select a commonly used angle collecting chip with a type of MPU6050 or MPU6000, and includes a three-axis acceleration sensor and a three-axis gyroscope element, and the axes of the two are overlapped, and the geometric center of the angle collector is the center of three axes. The data processor 14 is a low power processor and may be selected from a conventional processor chip of the type STM32L or MSP 430. The angle collector 10 is located on the right side of the ruler body, and the X-axis of the angle collector is parallel to the upper edge of the ruler body, so that on one hand the moving amplitude on the right side is maximized, and on the other hand the measuring accuracy is maximized. The angle collector 10, the data processor 12, the display 11, the battery 13, and the keys 14, 15, and 16 may be connected according to their respective functional relationships and by combining their respective corresponding functional interfaces of the chips of the above models.

The angle collector 10 can obtain a deflection angle theta of the measuring scale in the vertical direction, a rotation angle gamma of the measuring scale around a central line and a deflection angle psi of the measuring scale in the horizontal direction; after the angle data are obtained, the Cobb angle can be calculated and displayed on the display 11 through the processing of the data processor 12 according to the calculation formula in the principle.

The battery 13 is a solar battery and is arranged at the left edge of the straight ruler body.

The display 11 is located in the middle right part of the front of the straightedge near the lower edge.

The keys 14, 15 and 16 are arranged at the rightmost side of the ruler body for operation; the key 14 is used for triggering the angle collector to collect angle data and the data processor to process the data, the key 15 is used for triggering the data processor to clear the data, and the key 16 is used for triggering the angle collector to reset.

The back of the ruler body 9 is a smooth surface; the sizes are 24 cm long and 4.5 cm wide, the upper edge is provided with scale marks and scales, and the measuring range is 1-20 cm; the ruler body 9 is black in whole body, and the scale marks are white.

The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The above-described embodiments of the present invention are to be considered in all respects as illustrative and not restrictive. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments according to the actual technology of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. A measuring ruler for estimating the Cobb angle of scoliosis, characterized in that: comprises a ruler body as a main body, an angle collector, a data processor, a key, a display and a battery, wherein the angle collector, the data processor, the key, the display and the battery are arranged on the ruler body; the battery is used for providing working voltage for the angle collector, the data processor and the display; the key is used for triggering the angle collector and the data processor to work;

the angle collector comprises a triaxial acceleration sensor and a triaxial gyroscope element, the axial centers of the triaxial acceleration sensor and the triaxial gyroscope are overlapped, and the geometric center of the angle collector is the center of three axes; the angle collector is fixedly arranged on the right side of the ruler body, and the X-axis direction of the angle collector is parallel to the upper edge of the ruler body; the angle collector is used for acquiring a deflection angle theta of the ruler body in the vertical direction, a rotation angle gamma of the ruler body around a central line and a deflection angle psi of the ruler body in the horizontal direction; and the angle data signal acquired by the angle acquisition unit is input into the Cobb angle acquired by the data processor and output to the display for display.

2. The measurement ruler for estimating the lateral bending degree Cobb angle of the spine according to claim 1, characterized in that: the display is arranged on the right part of the front middle of the straight ruler body and close to the lower edge.

3. The measurement ruler for estimating the lateral bending degree Cobb angle of the spine according to claim 1, characterized in that: the button is arranged on the rightmost side of the straight ruler body.

4. The measurement ruler for estimating the lateral bending degree Cobb angle of the spine according to claim 1, characterized in that: the battery is one of a solar battery and a button battery.

5. The measurement ruler for assessing the lateral bending degree Cobb angle of the spine according to claim 4, wherein: the solar cell is positioned close to the left edge of the ruler body.

6. The measurement ruler for estimating the lateral bending degree Cobb angle of the spine according to claim 1, characterized in that: the back of the ruler body is a smooth surface.

7. The measurement ruler for assessing the degree of scoliosis Cobb angle as claimed in any one of claims 1-6, wherein: and the upper edge of the ruler body is provided with scale marks and scales.