Idiopathic Carpal Tunnel Syndrome Lab Report

Usefulness of neuromuscular ultrasound in the diagnosis of idiopathic carpal tunnel syndrome

Abstract
Objective: The aim of the study was to assess the usefulness of neuromuscular ultrasound in the diagnosis of idiopathic carpal tunnel syndrome (CTS); and to determine the relationships of ultrasonographic measurements with the clinical severity and the electrophysiological grading scale. Methods: One hundred CTS diseased hands and 100 non-diseased hands were assessed clinically and by nerve conduction studies. We measured ultrasonographic cross sectional area (CSA) of the median nerve at various levels of the carpal canal (inlet and outlet), flattening ratio (FR), palmar bowing of the flexor retinaculum (PB), wrist/ forearm ratio, as well …show more content…
The median nerve then imaged in cross-section at mid forearm, then the wrist forearm ratio (WFR) was calculated [10, 26]. The median nerve flattening ratio (FR) (at the pisiform level) was calculated by dividing the major transverse axis of the nerve by its minor longitudinal axis [27]. Flexor retinaculum bowing was defined as a measurement at 90°from a line drawn from the hook of the hamate bone to the tubercle of the trapezium bone [28]. The median nerve mobility (transverse sliding) in the carpal tunnel was observed dynamically during flexion/extension of the fingers and wrist. An imaginary, transverse line was drawn bisecting the levels of the pisiform and the hook of the hamate. The mobility of the median nerve was evaluated on axial plane at this level [29], and finally blood flow in the median nerve sheath was then detected around 2 cm above the carpal tunnel using color and power doppler sonography

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