After the rehabilitation patient installs the smart arm, try to operate the computer with a smart bionic hand. Guangzhou Daily, full media reporter Qiu Weirong photo
In the case of work-related injuries, Mr. Liu lost his limbs three years ago because of burns, and he could not take care of himself. Recently, his left arm was equipped with an intelligent bionic hand, who was able to drink water and tap the computer with a single finger. On January 4, the reporter saw the patient at the Guangdong Provincial Work Injury Rehabilitation Hospital and shook hands with him. It is reported that this is the first intelligent bionic hand application case of the hospital.
Patient: The action that can be done is beyond imagination
In 2014, due to an accident at the factory, Mr. Liu suffered from 95% skin area burns and partial amputation of limbs. He could not take care of himself and could not do without the care of his family. After entering the Guangdong Provincial Work Injury Rehabilitation Hospital, a specialist rehabilitation team consisting of rehabilitation doctors, physiotherapists, occupational therapists, social workers, rehabilitation nurses, and prosthetic orthopaedic surgeons held a rehabilitation evaluation meeting to conduct a detailed analysis of Mr. Liu’s function and developed Systematic rehabilitation plan. Last year, Mr. Liu installed two lower limb prostheses.
On the eve of New Year's Eve, Mr. Liu installed an intelligent bionic hand on his left arm. Although he is still not skilled enough, he has been able to complete simple actions such as drinking water, shaking hands, and pinching. The reporter shook hands with Mr. Liu. Apart from being a little tight and stiff, I felt that it was no different from the usual handshake. “I am very excited!†Mr. Liu said that after loading the bionic hand, he felt very good. The action that he could do was “beyond imaginationâ€. Then Mr. Liu also demonstrated the knocking on the computer for the reporter. He only saw the middle finger, ring finger and little finger Get up, and then bend the index finger, you can type the letters on the keyboard, he also knocked his name out, but the whole action is still slow. It is understood that in the future, Mr. Liu can use the spoon to eat and call, but can not send text messages, because you need to wear a special finger cot to use the touch screen.
“The most done action after loading is to drink water.†Mr. Liu’s wife, Ms. Zhu, said that although some common movements can be completed after the prosthesis is installed, some people still have to take care of them, so when the husband is familiar with the use of the prosthesis, In the future, I plan to go back to my hometown to do some small business. "For example, if there is a lot of money for the family, it is not a popular WeChat payment. It is not necessary to find money. He (husband) is sitting at the store."
Install bionic hand conditional
There are certain conditions for installing the intelligent bionic hand: the forearm residual limb should be no less than 5 cm, and the residual limb epidermis should be tested to have an EMG signal. Yi Wangxian, a prosthetic orthopaedic master of the Provincial Rehabilitation Hospital, said that intelligent bionic hands have been used commercially abroad around 2010, but the cost is relatively high. Foreign products cost more than 200,000 yuan, and domestic products cost 100,000 yuan. about.
Control: Finger telescopic can rely on the patient's will to do up to 16 groups of actions
Ai Wangxian said that the principle of this intelligent bionic hand is to use the contraction movement of the muscles of the residual limb to generate the myoelectric signal, which is captured by the surface electrode of the skin placed there, and after being amplified and processed by the myoelectric signal, the micromotor is controlled. Drive, and then through the reducer and booster mechanism, drive the functional movement of the finger, and control the movement of each function of the finger according to the will of the person. The bionic hand can complete 16 groups of movements, but the patient can choose 8 kinds of commonly used ones. These actions include holding the pen, single-finger tapping, pinching, holding the spoon, etc., and the grip force control can reach 140.1 cattle. "There are too many fine movements that can be done by human hands. There are 14 joints in one hand's fingers. It takes 14 fingers to drive each finger of the bionic hand. It is very difficult. This bionic hand uses 5 fingers. Independent micro-motor design, the most common combination of movements, is currently 16 to achieve the goal of improving the daily life of amputees."
Ai Wangxian said that before installing the intelligent bionic hand, Mr. Liu also conducted a three-month simulation of the EMG signal training, and trained the grasping and gripping actions through virtual hands. After installing the bionic hand, after training for about 1 month, you can basically master 8 sets of actions. "Our goal is to maximize the life function by allowing the patient to fully utilize the functions of the bionic hand through the training of the medical rehabilitation team." (Guangzhou Daily)
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