Children knee hyperextension corrector

Abstract

The invention discloses a children knee hyperextension corrector, which comprises a shank fixing part, a linkage part and a thigh fixing part. The shank fixing part comprises an arc-shaped sheet II, an adjusting screw II, a limiting strip II, a limiting rod II and a fixing belt II. When a patient squats, a gear rotates clockwise to enable a rack to move upwards to drive a piston to move upwards ina hydraulic cylinder, hydraulic oil in a bag body enters the hydraulic cylinder below the piston through a hose, the bag body shrinks, in the process, thigh muscles can expand, the bag body shrinks,and leg muscles are prevented from being pressed and further being damaged. When a patient stands after squatting, the gear rotates anticlockwise to enable the rack to move downwards to drive the piston to move downwards, the piston moves downwards in the hydraulic cylinder to enable hydraulic oil in the hydraulic cylinder below the piston to enter the bag body through the hose, so that the bag body is expanded, and in the first process, thigh muscles contract, and the bag body expands to enable the thigh fixing part to be tightly fixed to the thigh.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a knee hyperextension orthosis for children. Background technique [0002] The knee joint is the largest and most complex joint in the human body. Knee hyperextension is a common and serious deformity. It is usually a compensatory change. It is more common in the middle and late stages of the support phase. Common causes include 1. Weakness of one knee joint leads to lateral knee joint weakness Joint compensatory hyperextension; 2. Flexor muscle spasm or contracture causes knee hyperextension; 3. Knee hyperextension is used to compensate for knee collapse; 4. Support knee extensor spasm; 5. Gravity falls on the knee when the trunk is flexed forward In front of the joint, push the knee back to maintain balance. Knee hyperextension is an important problem of knee dysfunction. For spastic cerebral palsy, in the process of standing and walking, knee hyperextension is caused ...

AI Technical Summary

Problems solved by technology

But this patent has following shortcoming in its use; 1, because the hinge point of thigh board and calf board is positioned at patient's knee joint rear side, and thigh board and calf board are respectively fixed in thigh and shank, when squatting down, thigh and shank are bent The turning point is not at the same position as the hinge point of the thigh plate and the calf plate, and the thigh plate and the calf plate will interfere with the knee joint; The strap needs to be inelastic and tight against the leg so that when standing, the hinge between the thigh plate and calf plate rests against the back of the patient's knee joint, giving the back of the knee a backing force that pushes the knee back The symptoms of convexity are controlled to achieve the purpose of orthopedics. However, in actual use, the thigh muscles will expand when squatting. If the straps and legs are tight, the thigh muscles will be squeezed or the straps will move downward.

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