A, the necessary equipment 1, tweezers: the change of medicine used to clamp items, at least 3 tweezers. 2, small bowl: used to hold items when changing medication, prepare 2 small enamel bowls. 3, small enamel jar: used to hold alcohol cotton balls, saline cotton balls and iodine cotton balls and other things, need 2-3. 4, aluminum lunch box: used to hold gauze blocks, oil gauze strips, ulcer oil gauze strips and other things, 2-3 are needed. 5. Skimmed cotton and gauze: available in medical stores, and can be purchased according to the actual amount used. Second, the need for drugs 1, saline cotton ball: commercially available 0.9% saline, soaked skimmed cotton can be configured into saline cotton ball. 2, alcohol cotton balls: commercially available 75% medical alcohol, soaked in skimmed cotton can be configured into alcohol cotton balls. 3, iodine cotton ball: commercially available 2% iodine soaked skimmed cotton that is configured into iodine cotton ball. 4, hydrogen peroxide: commercially available medical hydrogen peroxide. 5, ralph lauren polar commercially available ralph lauren polar solution. 7, oil gauze. Use medical petroleum jelly, apply to the gauze, and then steam in a pot for 30 minutes (counting time when the pot is opened), cooled and ready for use. In the summer is valid for one week, winter is valid for two weeks, after the expiration mill re-steaming sterilization. 8.Ulcer oil gauze: Soak sterile gauze into ulcer oil and set aside. 9.Desensitizing tape: commercially available desensitizing tape. III. Method When changing medicine, no matter what type of wounds and traumas, the following methods should be followed 1) Clean treatment of wound After uncovering the last dressing and opening the wound, the first thing to do is to clean the treatment. The treatment method is to first use alcohol cotton balls to lightly wipe the skin around the wound, and then use cotton balls dipped in saline or saline cotton balls to gently dip and wash the wound to clean the pus, blood and dirt. Do not rub hard, and do not use the used cotton balls to wash the wound again. 2) Observe the changes in the wound Each time you change the medication, you should carefully observe the changes in the wound to see how it is different from the last time you changed the medication. The observation includes: ① whether the granulation tissue is fresh; ② whether the pus or secretion is reduced; ③ whether there is redness, swelling and pain of the skin around the wound; ④ whether the wound area is reduced and whether the ulcer becomes shallow. 3) Apply and change the medication according to the condition of the wound to decide what kind of medication to apply externally, and then apply it to the wound. See Part II for the selection of specific medication. 4) Apply sterile gauze to cover the wound, and then fix it with adhesive tape. IV. Principles of medication change 1. When changing medication at home, it must be done in a relatively clean room, i.e. a room with no dust and fresh air. 2.Change medicine, roll the clothes above the hands and wash your hands. 3.When changing medicine, aseptic operation must be strictly observed. Various sterilized cotton balls and dressings, after being clamped out from the container, must not be put back into the original container. Contaminated dressings must be put in a fixed place and not thrown away at will. 4.When changing the dressing, the action should be gentle, and the outer layer of dressing can be removed by hand. The inner layer of dressing should be removed with sterilized regents, such as adhesions are very tight, do not tear, can be given to the patient with a sterile dressing change bowl with saline after soaking, to be completely wet dressing and then gently uncovered. This can reduce the patient’s pain and prevent bleeding from the new flesh of the wound. 5.The pterygium which is higher than the skin surface in the wound position can be cut flat with sterile scissors or gently clamped away with a regent (with teeth). 6.When applying the medicine, the medicine should be applied firmly and comfortably to the affected area. 7, where the lower limb ulcers (venous stasis ulcers), whether new or long disease, after the dressing are applied to the level of the band binding the affected area. The winding method should be tied from the lower end of the wound to the lower leg to increase blood flow and accelerate the healing of the wound. V. Treatment of instruments After the drug change, sterile instruments have become sterile, so they should be sterilized before being used again. 1.Soak disinfection You can use disinfection to soak the used instruments to achieve the purpose of disinfection. Commonly used disinfection are 1‰ of Neosporin, 75% alcohol. Soaking method: ① first brush the used instruments with water to clean the ears and dry them; ② place them into the disinfection solution and soak them for 1 hour. 2. Steaming Sterilization Used instruments can be sterilized by steaming. Gauze and cotton bought from the store must be fumigated before use. Generally speaking, instruments can be steamed for 40 minutes to 1 hour, and gauze and skimmed cotton must be steamed for more than 1 hour to achieve the purpose of sterilization.