Abstract:Objective To determine whether there is any other combined damage except the parts of compression in the compressive nerves by characterizeing the ultrasonic images of the patients with upper limb nerve compression, and to obtain the relationships of the combined nerve damage with gender and the cross sectional area (CSA) of the compressive site. Methods Ultrasonographic data of 49 patients with carpal tunnel syndrome (CTS) and cubital tunnel syndrome (CubTS) in our hospital from October 2013 to October 2015 were reviewed. The compressive nerves were divided into CTS with increased CSA group, CTS with normal CSA group, CubTS with increased CSA group and CubTS with normal CSA group. The situation of combined nerve damage in each group was studied, and the correlations of the combined nerve damage with gender and the CSA of the compressive site were analyzed. Results Of the 79 compressive nerves, 48 had combined damage. In the CTS with increased CSA group, the CSA of the nerve compressive site in the patients with combined damage was larger than that in the patients without combined damage (p < 0.05). There was significant difference in gender between the CTS with increased CSA group and the CTS with normal CSA group (p < 0.05). Conclusions The study suggests that damage of the compressive nerve is not only in the compressive site, but also involves other parts of the nerve. The combined lesion of CTS may be related to the thicking of the compressive nerve. Nerve compression is not necessarily accompanied by nerve swelling at the compressive point. Gender may be a factor affecting the CSA of the compressive point. High-frequency ultrasonography has important implications for the diagnosis of nerve compression, and has a potential value in the early diagnosis.