Strengthen clinical practice ability and improve professional knowledge and skills. Instrument nurse, also known as hand washing nurse, is a kind of operating room nurse. They need to wash their hands and then go on stage to participate in the operation. They need to strengthen their clinical practice ability, improve their professional knowledge and skills, and improve the quality and safety of nursing to meet these expected conditions. After the instrument nurse needs to clean and disinfect by hand, she goes to the operating table to hand over the instruments.