Abstract: Objective To evaluate the application value of high frequency ultrasonography in peripheral nerve trauma of upper limbs.Methods Thirty-seven nerves from 10 healthy volunteers and 25 patients with upper limb peripheral nerve trauma were examined with high frequency ultrasonography before operation,and the ultrasonographic features were compared to operation result.Results Thirty-four median nerves were diagnosed injury from 22 patients,in which 33 from 21 patients with carpal tunnel syndrome,and 1 from a pat...