A force line measurement angle positioning device for osteotomy around the knee joint

Abstract

The invention provides a positioning device for the force line measuring angle of an osteotomy around a knee. The positioning device comprises an angled force line measuring rod, a fixing assembly, asupporting needle and clamping board bases; the angled force line measuring rod comprises a fixing rod, a first movable rod and a second movable rod; one surface of the fixing assembly is connected with one end of the fixing rod, the portion, located on the opposite surface of the connected surface of the fixing rod and the fixing assembly, on the fixing assembly is movably connected with one endof the first movable rod, and the other end of the first movable rod is pivoted on the second movable rod through a pivoting shaft; the supporting needle penetrates a thighbone or shin bone of a lowerlimb of a human body, and the two ends of the supporting needle are fixed onto the clamping board bases; the fixing assembly is located above the lower limb and movably connected with the clamping board bases. The device has the advantages that a product is simple to operate, convenient to use, stable and reliable; surgical time is shortened, the precision of osteotomy orthopaedics is improved, and the number of times of fluoroscopy and the radiant quantity are greatly reduced, so that it is avoided that the patient and doctors receive too much radiation, so that physical health is affected.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to a force line measuring angle positioning device for osteotomy around the knee joint. Background technique [0002] Clinically, patients suffering from knee pain are more likely to have early osteoarthritis accompanied by varus deformity of the knee joint. Due to congenital or acquired factors, the proximal tibial articular surface or distal femoral articular surface is varus relative to normal people, resulting in varus deformity of the knee joint, so that the line of force of the lower limbs, that is, the weight-bearing line, passes through the medial side of the knee joint during weight-bearing, causing The medial knee joint bears greater stress, and when it exceeds the physiological tolerance level, the joint degeneration accelerates, which further aggravates the knee joint varus, resulting in a vicious circle. The line of force of the lower limbs is the line from the...

AI Technical Summary

Problems solved by technology

Since the doctor holds the limbs or metal rods by hand, absolute stability cannot be guaranteed, which affects the accuracy of measurement, and multiple X-ray perspectives will greatly prolong the operation time and affect the safety of patients.

In addition, the X-ray fluoroscopy process will greatly increase the dose of radiation received by patients and surgeons, affecting their health

[0005] However, there is no corresponding device in the prior art to assist in these operations. An invention patent is currently being applied for, with the application number 201710142181.5, a force line locator for high tibial osteotomy, which can solve the problem according to the description in the manual. In the existing high tibial osteotomy, the doctor needs to hold the line of force measuring piece for positioning work, which affects the accuracy of the high tibial osteotomy, and increases the radiation dose received by the surgeon and affects the health of the doctor.

However, the description does not mention how to control the neutral position of the lower limbs, so a doctor is still needed to assist in controlling the external rotation of the lower limbs during the operation

In addition, the fixation between the device and the limbs is not absolutely firm, and the limbs need to be repositioned each time after the operation, which is cumbersome to operate, and the positioner is only used for the lower limbs, and has no other derivative functions, so the scope of application is limited

Images