"Implanting an instrument means leaving the instrument in the body for at least 10 days by surgery" is incorrect. There are many kinds of implantable devices, such as surgical implants: artificial joints, structural prostheses, dentures and other artificial organs; Beauty and cosmetic implants; Interventional instruments: interventional catheter, stent, embolism and artificial pacemaker, etc. Some of these implanted devices will remain in people's bodies for life, and some will be replaced or taken out later, which is determined according to the characteristics of the devices and the use of people, and cannot be generalized.