A useful electrophysiologic parameter for diagnosis of carpal tunnel syndrome

Abstract

In 43 patients (50 hands) with clinical manifestations of mild‐moderate carpal tunnel syndrome (CTS) and 36 healthy volunteers (40 hands), orthodromic sensory nerve conduction velocity (SNCV) was measured with surface electrodes in the median nerve between the third digit and palm and between the palm and wrist. These figures were used to calculate the ratio of distal to proximal conduction (distoproximal ratio). All 90 hands were also subjected to other nerve conduction studies used for diagnosis of CTS. All control hands presented distoproximal ratios <1.0, reflecting higher conduction rates in the proximal segment. In contrast, 49 of 50 CTS hands (98%) presented reversed ratios (>1.0) indicating compromised proximal conduction. The sensitivity of this test was significantly greater than that of other methods evaluated, including comparative studies and segmental study of the palm‐wrist portion of the median nerve. Segmental study of median SNCV with calculation of the distoproximal ratio is a sensitive technique for diagnosis of CTS in patients with normal findings in standard nerve conduction studies. © 1996 John Wiley & Sons, Inc.

Median versus ulnar medial thenar motor recording in diagnosis of carpal tunnel syndrome

“…The current study is in accordance with Padua et al [32] and Celik and Guven [33]. Padua et al reported that median sensory study had low sensitivity in the diagnosis of CTS [32].…”

“…Padua et al reported that median sensory study had low sensitivity in the diagnosis of CTS [32]. Celik and Guven reported that median sensory CV of the digit two had sensitivity of 81.5% while median versus ulnar digit four sensory latency difference had a sensitivity of 92% [33].…”

Lumbrical-interosseous recording technique versus routine electrodiagnostic methods in the diagnosis of carpal tunnel syndrome

“…[2,10,11] Several studies have shown different ages for the onset of CTS ranging between 45.2 and 51 years. [11][12][13][14] In our study, female patients predominated (95.1%) with a mean age of 49.9±10.1 years. In many studies, CTS has been more commonly reported in women.…”

Increased Forward Head Posture and Restricted Cervical Range of Motion in Patients With Carpal Tunnel Syndrome

“…One of the most common postural abnormalities identified in clinical setting (66%) is a forward head posture (FHP), which implies that the head is anterior to a line nerve sensory conduction velocities) underwent further comparative (median/ ulnar) tests. 22 Sensory and motor conduction studies of radial and ulnar nerves were conducted to rule out radial or ulnar nerve involvement. Patients diagnosed with either moderate (abnormal median nerve sensory latency and abnormal median nerve distal motor latency) or mild (abnormal median nerve sensory latency and normal median nerve distal motor latency) CTS were included in the study.…”