It is necessary to open subcutaneous arteriovenous fistulas for patients with chronic renal failure for the future steps of dialysis. These surgical procedures are performed under sedation, local anesthesia, regional anesthesia, or general anesthesia. In this case report, we shared our anesthesia experience in a patient with comorbid diseases, high BMI, and difficult airway to undergo fistula surgery between the left brachial artery and the left axillary vein. We performed serratus anterior plane block and infraclavicular block which was successful, and the surgical procedure was performed comfortably without any complications. Infraclavicular block and upper-level serratus anterior plane block can be applied together for anesthesia of the T1-T2 dermatome.