Dress the wound with a wound.

Answer: (1) preoperative preparation: ① operator preparation: before dressing change, the operator should wash his hands according to the aseptic principle, wear a hat and mask, and explain the purpose of dressing change to the patient to get cooperation. ② Patient's position: adopt different lying positions or other stable positions according to the wound site to make the patient comfortable, fully exposed, with sufficient light and easy to operate, and try not to let the patient see the wound; ③ Check the wound: If necessary, check the wound first and estimate how many dressings and instruments (scissors, probes, etc.) there are. ) and medicines are needed, and they are ready at one time. (2) dressing change step: ① removing the dressing. Remove the outer dressing by hand (do not use tweezers), and then remove the inner dressing with tweezers. The inner dressing should be light and easy to remove, usually along the long axis of the wound. If the dressing is dry and sticks to the wound, it should not be difficult to remove it. Soak in normal saline before taking it out to avoid bleeding from the wound. ② Hold the tweezers with both hands, and the tweezers on the left will take the sterile items out of the dressing bowl and pass them to the tweezers on the right. These two tweezers should not touch each other. (3) If there is no infected wound, disinfect the wound and surrounding skin from the inside out with iodine tincture and 75% alcohol cotton ball, and wipe it 2 ~ 3 times along the incision direction, 3 ~ 5 cm away from the incision. If it is an infected wound, wipe it from the periphery to the infected wound. (4) When there are many secretions and the wound is deep, dry cotton balls and physiological saline cotton balls should be used to wipe it and clean it up. ⑤ The granulation tissue and more necrotic substances that are higher than the skin surface or unhealthy can be cut flat with scissors, and then wiped with isotonic saline. If granulation tissue has obvious edema, 3% ~ 5% hypertonic saline can be used for wet compress. ⑥ The wound surface can be covered with sterilized vaseline gauze, and the contaminated wound surface or bleeding wound surface should be covered with drainage gauze to prevent deep suppurative infection.