Lumbrical and interossei recording in severe carpal tunnel syndrome

Boonyapisit, Kanokwan; Katirji, Bashar; Shapiro, Barbara E.; Preston, David C.

doi:10.1002/mus.10002

Cited by 42 publications

(42 citation statements)

References 10 publications

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“…This lack of sensitivity, particularly for motor conduction, may result in failure to detect abnormalities (5, 18 21). Our results support earlier findings that sensory studies are of limited value in severe CTS because the responses are often absent (3,22). Previous studies showed a higher mean value of TLI in the control group than our study (12,23).…”

Section: Discussionsupporting

confidence: 92%

Comparison of Interpolation Methods in the Diagnosis of Carpal Tunnel Syndrome

Alcan¹,

Zinnuroğlu²,

Karataş³

et al. 2018

Balkan Med J

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Section: Discussionsupporting

confidence: 92%

Comparison of Interpolation Methods in the Diagnosis of Carpal Tunnel Syndrome

Alcan¹,

Zinnuroğlu²,

Karataş³

et al. 2018

Balkan Med J

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“…Boonyapisit et al [10] reported 6.0 ms for mean L-I value in their severe CTS group, and found the sensitivity of L-I method as 92.8%. In addition, Kodama et al [25] found the sensitivity of L-I method to be 92%.…”

Section: Discussionmentioning

confidence: 94%

“…It is more prevalent in women. [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.…”

Section: Discussionmentioning

confidence: 99%

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

Yılmaz

Gündüz

Akyüz

2017

Turk J Phys Med Rehab

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Objectives:We aimed to evaluate the sensitivity of second lumbrical-interosseous (L-I) technique and to compare the results with other electrophysiological methods in patients with carpal tunnel syndrome (CTS). Patients and methods:This cross-sectional study was conducted in an electrophysiology laboratory of a university hospital between January 2003 and January 2004. A total of 102 patients with CTS (174 hands) and 40 healthy controls (80 hands) were included. Median motor nerve conduction studies were obtained with recordings from the abductor pollicis brevis (APB), median sensory nerve conduction studies from digits I-III and at palm-wrist segment (P-W), median-ulnar sensory comparison at digit IV (M-U), and median-radial sensory comparison at digit I (M-R) were along with L-I technique. Results:The highest sensitivities were found in the median sensory conduction velocity across the palm-wrist (88%), and digit I-wrist segments (80%), median motor distal latency over the APB (77%), and L-I study (76%). The specificities of conventional tests were higher than the sensitivity of L-I method (63%).Conclusion: L-I method has a good diagnostic sensitivity in CTS; however, P-W, median sensory nerve conduction velocity at digit I and median distal motor latency are more sensitive than L-I method. Therefore, L-I method can be applied as a supportive technique in the evaluation of patients with CTS.

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“…2,[5][6][7][8][9][11][12][13]15 Conversely, the study is frequently helpful in late-stage CTS. 1 In these cases, a prolonged distal latency in the demyelinative range can often be demonstrated to the 2L, even when the routine median motor and sensory responses are absent. In patients with an underlying peripheral neuropathy, the study is helpful in demonstrating a superimposed median neuropathy at the wrist when the median distal latency to the 2L is delayed out of proportion to that of the ulnar distal latency to the INT.…”

mentioning

confidence: 98%

“…1,2,[13][14][15] Using the same recording electrode montage, stimulation of the median and ulnar nerves at the wrist allows recording from the second lumbrical (2L) and deeper interossei (INT), respectively. 4,7 This technique results in an ideal internal control in which several variables are held constant, among them axon size, temperature, age, and distance.…”

mentioning

confidence: 99%

Optimal recording electrode placement in the lumbrical–interossei comparison study

et al. 2005

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The lumbrical-interossei comparison study is commonly employed in the electrodiagnosis of carpal tunnel syndrome. Placement of the recording electrodes relies on anatomic landmarks as the muscles being recorded cannot be seen or palpated. To determine the optimal active electrode location, 15 controls and 5 patients were studied using a grid of 12 electrodes placed over the lateral palm. Amplitudes, rise-times, and latencies of the responses at each location were measured. The lowest control latency difference was located in the lateral mid-proximal palm (mean 0 ms, upper range of 0.5 ms). This location also had the highest lumbrical amplitude and rise-time. More distal in the palm, the mean latency difference increased to 0.5 ms with an upper range of 0.9 ms. When performing the lumbrical-interossei comparison study, it is essential to place the active recording electrode in the optimal location. Failure to do so will result in an increased number of false-positive studies.

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Lumbrical and interossei recording in severe carpal tunnel syndrome

Cited by 42 publications

References 10 publications

Comparison of Interpolation Methods in the Diagnosis of Carpal Tunnel Syndrome

Comparison of Interpolation Methods in the Diagnosis of Carpal Tunnel Syndrome

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

Optimal recording electrode placement in the lumbrical–interossei comparison study

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