Ultrasound-Guided Peripheral Nerve Blocks Performed by Orthopedic Surgeons : A Retrospective, Multicenter Study in Akita Prefecture, Japan

e shortage of doctors is a societal problem, especially in rural areas such as Akita Prefecture, Japan. (erefore, it is not unusualin Akita for orthopedic surgeons to perform upper and lower limb surgeries under ultrasound-guided peripheral nerve blocksmanaged by the operators themselves. Multicenter studies of ultrasound-guided peripheral nerve blocks performed by orthopedicsurgeons have not been reported. (e purpose of this study was to clarify the safety and reliability of ultrasound-guided peripheralnerve blocks performed by orthopedic surgeons in Akita. A total of 1,674 upper extremity surgery cases operated under ul-trasound-guided peripheral nerve blocks at 8 hospitals in Akita prefecture from April 2016 to April 2018 were investigatedretrospectively. (ese blocks were performed by a total of 37 orthopedic surgeons, including senior surgeons and residents. In 321of the 1,674 cases (19%), local anesthetics were added to the surgical field. Two cases with special factors were converted to generalanesthesia. (ere were 2 cases of complications associated with the nerve block, but they were all transient and recoveredpromptly. (e block site and the hospital where the block was performed showed a significant relationship with the addition oflocal anesthetics to the surgical site (P<0.001). Surgery time, age at surgery, and surgical site showed no significant relationshipswith the addition of local anesthetics. (e volume of the anesthetic used for the nerve block showed a significant inverse re-lationship with the addition of local anesthetics (P�0.040). Many orthopedic surgeons in Akita prefecture began to performultrasound-guided peripheral nerve blocks, which had a reliable anesthesia effect with no noticeable complications, whetherperformed by residents or senior orthopedic surgeons, and this is a useful anesthetic technique for orthopedic surgeons.