What are the methods to control the prosthetic orthotics?
For different prosthetic orthotics, the control methods are also different. Then we will briefly introduce some common methods to control the prosthetic orthotics.
The prosthesis is usually single axis, but the human physiological knee joint is a compound joint. It should also have horizontal movement when it rotates, so it is gradually replaced by multi axis knee joint. Compared with single axis knee joint, multi axis knee joint is stable in the support period, and easy to transition to the swing period.
The design of the connecting rod structure can make the amputee keep stable when the heel is on the ground. When the amputee is off the ground, the small force of the residual limb can make the joint buckle, and there will be no problem in the appearance when sitting down. Generally, the four-bar structure is widely used in the knee joint.
In addition, in order to help patients move better, the prosthesis is is designed with a swing period control device, such as air pressure control device. This device has the same principle as the hydraulic control device, but it changes the disadvantages of the hydraulic device in adjusting the gait to limit the knee joint flexion, and compared with the hydraulic knee joint, it reduces the weight and reduces the failure rate.
Until the support period, the control mode is basically to use muscle force to control at will. In addition to the knee joint of the automatic locking device, the joints of other structures need muscle force to control more or less. The flexion and extensor muscles of the hip joint play an important role in the swing period of the knee joint. If the flexor and extensor muscles of the hip joint are strong and the residual limbs are long, the control device can be adjusted to a state of fast walking.
The above is about how to control the prosthetic appliance. I hope our introduction can help you