Patient's question:
2013, 04, 18 Redness and swelling. There is strangury. Xiaolan People's HospitalDoctor's answer:
The surgery can be performed under local infiltration anesthesia with 1% novocaine, or under general anesthesia for children. During the procedure, a probe can be used for guidance, or a blunt needle can be inserted preoperatively to inject methylene blue or methyl violet into the fistula as a marker. When using this method, the amount of medication should not be excessive. After injection, gently massage and wipe off any excess dye to avoid contaminating the surgical site. A incision can be made at the fistula opening, extended along the direction of the auricular crus, and the fistula can be separated along its course until the ends of all branches are exposed. If there is inflamed granulation tissue, it can be excised along with it. The surgical wound should be coated with iodine solution. If there is a large skin defect, after removing the granulation tissue, skin grafting or daily dressing changes can be performed, leading to secondary healing of the wound.