Medical fetters refer to a medical instrument, usually made of metal or plastic, which is used to fix the position of limbs or hands and feet. Fetters are usually used in medical operations or emergencies to keep patients stable. For example, when a patient needs surgery for a fracture, the doctor will fix the bone with shackles to prevent the fracture position from moving, which will lead to the failure of the operation.

However, shackles also have adverse effects. Long-term use of shackles will lead to muscle atrophy, stiffness of bones and joints, and will also affect the normal function of blood circulation and nervous system. Therefore, doctors must use fetters carefully, adjust the patient's position in time, and pay attention to the patient's physical reaction.

With the continuous development of medicine and technology, medical bondage is no longer the only method that doctors must use. Modern medicine uses many different methods to maintain the stability of patients, such as using wheelchairs and special shelves to fix limbs, and using medical tapes and soft bandages. Doctors should receive regular training and update their skills and knowledge in order to better provide appropriate medical services for patients.