Auxiliary positioning method and system for joint replacement surgery based on inertial navigation

Abstract

The invention relates to a surgery apparatus, in particular to a joint replacement surgery auxiliary positioning method and system based on inertia navigation. The system comprises a reference inertial sensor, a control terminal, a reference fixing frame, an adjustment inertial sensor, a distal femur osteotomy adjustment device, a distal femur osteotomy guider and a femur saw cutting groove. A method comprises the steps of S1, establishing communication connection among the reference inertial sensor, the adjustment inertial sensor and the control terminal; S2, demarcating the reference inertial sensor and the adjustment inertial sensor; S3, registering the femur; S4, calculating internal / external reversing angle and the front / rear inclining angle of the distal femur osteotomy adjustment device; S5, adjusting the internal / external reversing angle and the front / rear inclining angle through the distal femur osteotomy adjustment device, and determining the final osteotomy plane; and S6, performing osteotomy. According to the joint replacement surgery auxiliary position method and system disclosed by the invention, relevant axis recognition and positioning in the joint replacement surgery can be quickly realized, the surgery operation can be simplified, the surgery time is shortened, and the cost price can be reduced.

Description

technical field [0001] The invention relates to a surgical instrument, in particular to an inertial navigation-based auxiliary positioning method and system for joint replacement surgery. Background technique [0002] With the increasingly serious problem of population aging in my country, the incidence of knee osteoarthritis OA is on the rise, and the average age of patients is on the decline. At present, total knee arthroplasty (TKA) is a reliable treatment for severe OA. As people's living standards are getting higher and higher, more and more patients undergo TKA surgery. [0003] TKA needs to accurately restore the line of lower limbs while amputating the diseased osteochondral tissue, otherwise problems such as poor function, severe wear of the prosthesis, dislocation, and revision will occur. This requires TKA surgery to perform precise osteotomy and prosthetic implantation according to the anatomy and pathological changes of the patient's lower limbs. [0004] Conv...

AI Technical Summary

Problems solved by technology

[0005] With the development of computer technology, infrared sensing technology, and CT technology, computer-aided navigation TKA began to appear, but this type of equipment relies heavily on image processing, visual marking of the body surface, and the intraoperative positioning and sensing time is long, bulky, and expensive. expensive

In recent years, with the development of MENS sensors such as accelerometers and gyroscopes, and the development of wireless data transmission technology, shadowless small computer navigation has begun to develop abroad and is used in clinical practice. This type of implant and related axis can be realized Precise positioning, such as zimmer's i-Assist, but its price is expensive, the operation of surgical instruments is complicated, and the operation time is long, so it has not been used in large-scale clinical applications in my country

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