Long bone rotation osteotomy angle measuring system and data processing method

Abstract

The invention relates to a long bone rotary osteotomy angle measuring system and a data processing method. The system has the advantages of being simple in structure, reasonable in design, convenientto use and capable of measuring a required angle in real time. The system comprises two relatively independent measurement modules which are exactly the same in composition; each measurement module comprises a housing, a long bone fixator and a measuring circuit; each measuring circuit is positioned on the corresponding housing and fixedly connected with the corresponding detachable long bone fixator; each measuring circuit includes a sensor, a processor and a display unit; an output end of each sensor is connected with an input end of the corresponding processor, and an output end of each processor is connected with the corresponding display unit; each sensor includes a geomagnetic sensor, two acceleration sensors or a tilt angle sensor and a gyro sensor, wherein the geomagnetic sensor isused for measuring the included angle between the corresponding housing and the geomagnetism direction. Each processor is used for collecting real-time measurement data of the corresponding sensor, and the spatial angle of each measurement module is obtained by calculating the differences between measurement data of the front and rear states; each display unit is used for displaying the spatial angle of the corresponding measurement module in real time.

Description

technical field [0001] The invention relates to an auxiliary system for rotary osteotomy, in particular to an angle measurement system and a data processing method for long bone rotary osteotomy. Background technique [0002] In the rotational osteotomy of long bones (femur, tibia, humerus, radius, ulna), before osteotomy, a parallel steel needle is driven into the bone at the upper and lower ends of the cut surface of the long bone, and the long bone is cut off and then rotated. The distal end of the osteotomy is cut, and the angle between the two steel needles is obtained by the operator visually or by taking pictures, so as to determine the rotation angle. Although this method is simple and easy to implement, it is difficult to accurately measure the value of the rotation angle, resulting in poor surgical results, and severe cases require reoperation. [0003] The above method has obvious disadvantages. Firstly, the long bone is very hard and has a convex surface, so it...

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Problems solved by technology

Although this method is simple and easy to implement, it is difficult to accurately measure the rotation angle value, resulting in poor surgical results, and severe cases require reoperation

[0003] The above method has obvious disadvantages

Firstly, the long bone is very hard and has a convex surface, so it is difficult to guarantee the initial parallelism between the two steel needles when they are driven into the bone, that is, there is a relatively small relative angle after the steel needles are driven into the bone; The influence of the photographer's perspective, as well as the limitations of the inherent shortcomings of the difficulty of measuring the angle of the human eye or the plane accurately, cannot accurately measure the angle after rotation

Third, the whole process requires the help of assistants in the audience, which takes a long time

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