Instruments after surgery in the hospital are disposed of according to categories. Generally, metal instruments should be rinsed, wiped, and air-dried. They should be free of oil and set aside for use. They should be packaged for high-pressure sterilization before use next time. Sharp knives, scissors, needles, threads, etc. should be soaked separately and cannot be sterilized by high-pressure. Surgical towels, large and small surgical drapes , cotton dressings, etc. are soaked, cleaned, and dried in disinfectant, sorted, packaged and sterilized; disposable syringes, infusion sets, catheters, surgical drapes, etc. are discarded readily.