Comparison Between Combined Sensory Index Test and Diagnostic Ultrasonography (Inlet Outlet Ratio) in Suspected or Early Cases of Carpal Tunnel Syndrome

Background: The combined sensory index (CSI) test is more precise in diagnosing carpal tunnel syndrome (CTS) early cases. Another useful tool for early detection of CTS is the diagnostic ultrasonography. Objective: The present study was conducted to compare between the CSI test and its sensitivity with diagnostic ultrasonography IOR (inlet outlet ratio) in suspected or early cases of carpal tunnel syndrome (CTS). Patients and methods: The presentcase-control study involved 20 subjects with signs and symptoms suggestive of early cases of CTS with duration less than 6 months, in addition to 20 apparently healthy subjects who were clinically examined and underwent EDX and US evaluation. We excluded patients with severe CTS, proximal cervical lesion, or other neurological diseases. Results: By comparison, CSI shows a higher sensitivity than IOR. Combining both tests induced elevated substantial differences between patients as well as controls (P