Neurophysiological Recovery After Open Carpal Tunnel Decompression: Comparison of Simple Decompression and Decompression with Epineurotomy

2003 ◽  
Vol 28 (5) ◽  
pp. 450-454 ◽  
Author(s):  
N. BORISCH ◽  
P. HAUSSMANN
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Carpal Tunnel ◽  
Nerve Conduction ◽  
Carpal Tunnel Release ◽  
Nerve Conduction Studies ◽  
Motor Latency ◽  
Significant Difference ◽  
Tunnel Syndrome ◽  
Open Carpal Tunnel Release ◽  
Simple Decompression

Two hundred and seventy-three patients with carpal tunnel syndrome without advanced neurophysiological changes (distal motor latency below 11 ms) were randomized to treatment by open carpal tunnel release with, or without, epineurotomy. Patients were examined clinically and by nerve conduction studies preoperatively and at 3, 6 and 12 months postoperatively. We found no statistically significant difference between simple decompression and decompression combined with epineurotomy with regard to either the clinical or the neurophysiological outcome.

Pre-operative electrodiagnostic testing predicts time to resolution of symptoms after carpal tunnel release

2015 ◽  
Vol 41 (2) ◽  
pp. 137-142 ◽  
Author(s):  
J. R. Fowler ◽  
M. Munsch ◽  
Y. Huang ◽  
W. C. Hagberg ◽  
J. E. Imbriglia
Keyword(s):  
Carpal Tunnel Syndrome ◽  
No Value ◽  
Carpal Tunnel ◽  
Nerve Conduction ◽  
Carpal Tunnel Release ◽  
Nerve Conduction Studies ◽  
Level Of Evidence ◽  
Electrodiagnostic Testing ◽  
Tunnel Syndrome ◽  
Open Carpal Tunnel Release

The purpose of this study was to determine if nerve conduction studies predict time to resolution of symptoms after carpal tunnel release. A total of 56 patients undergoing open carpal tunnel release were prospectively enrolled. Pre-operative presence of nocturnal symptoms and daytime numbness/tingling were documented. Pre-operative nerve conduction studies were reviewed and classified as mild, moderate, or severe. After open carpal tunnel release, patients were contacted by phone within 48 hours, at 1 week, and then at 2-week intervals for up to 9 months or until both nocturnal and daytime symptoms had resolved. This study found that patients with mild or moderate carpal tunnel syndrome experience a faster time to resolution of daytime numbness and tingling when compared with patients with severe carpal tunnel syndrome. Nocturnal symptoms resolved quickly in both groups. The results of this study are in contrast to previous studies that found little to no value of nerve conduction studies in predicting post-operative functional and subjective outcomes. Level of Evidence: IV

Use of Nerve Conduction Studies and the Pressure-Specified Sensory Device in the Diagnosis of Carpal Tunnel Syndrome

2009 ◽  
Vol 34 (1) ◽  
pp. 60-65 ◽  
Author(s):  
D. J. SLUTSKY
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Carpal Tunnel ◽  
Nerve Conduction ◽  
Diagnostic Yield ◽  
Carpal Tunnel Release ◽  
Nerve Conduction Studies ◽  
Control Group ◽  
Asymptomatic Volunteers ◽  
Before And After ◽  
Tunnel Syndrome

Sixty-nine patients with signs of carpal tunnel syndrome (CTS) underwent nerve conduction studies (NCS) and testing with the Pressure-Specified Sensory Device (PSSD). A total of 102 tests were performed (28 bilateral). Twenty patients underwent a carpal tunnel release and were retested after 4 to 6 months. The Symptom Severity Score (SSS) was calculated before and after surgery. A control group of 20 hands in 10 asymptomatic volunteers underwent identical testing. The NCS sensitivity was 87% with a specificity of 90% whereas the PSSD sensitivity was 81% with a specificity of 65%. The combined sensitivity of the two tests was 93%. In the operative group the SSS improved from a mean of 3.34 pre-operatively to 1.95 postoperatively. The NCS improved in 19/21 hands whereas the PSSD improved in 16/19 hands. The non-invasive SSS and PSSD can increase the diagnostic yield in CTS, especially when the NCS are normal.

Carpal Tunnel Release Despite Normal Nerve Conduction Studies in Carpal Tunnel Syndrome Patients

2021 ◽  
Vol 86 (1) ◽  
pp. 52-57
Author(s):  
Jun-Ku Lee ◽  
Byung-Nam Yoon ◽  
Jin Woo Cho ◽  
Han-Seung Ryu ◽  
Soo-Hong Han
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Carpal Tunnel ◽  
Nerve Conduction ◽  
Carpal Tunnel Release ◽  
Nerve Conduction Studies ◽  
Tunnel Syndrome ◽  
Normal Nerve Conduction

The results of carpal tunnel release for carpal tunnel syndrome diagnosed on clinical grounds, with or without electrophysiological investigations: a randomized study

2012 ◽  
Vol 38 (1) ◽  
pp. 44-49 ◽  
Author(s):  
A. Żyluk ◽  
Z. Szlosser
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Carpal Tunnel ◽  
Nerve Conduction ◽  
Carpal Tunnel Release ◽  
Randomized Study ◽  
Clinical Importance ◽  
Nerve Conduction Studies ◽  
Pinch Strength ◽  
Tunnel Syndrome ◽  
To Receive

We compared the results of carpal tunnel release in patients with the diagnosis of carpal tunnel syndrome based on only clinical grounds and those diagnosed on clinical and electrophysiological grounds. Ninety-three patients, 83 women (89%) and ten men (11%), meeting the criteria of ‘typical’ carpal tunnel syndrome, were randomly assigned to receive carpal tunnel release with ( n = 45, 48%) or without ( n = 48, 52%) nerve conduction studies. Patients were followed-up at 1 and 6 months, by assessments that included the Levine scores, filament tests, grip and pinch strength. No significant differences in Levine scores were found at the 1 and 6 months assessments. Statistically significant differences were noted in three-point pinch strength and sensation; however, they were not of clinical importance. The results of the study show that the results of carpal tunnel release in patients with typical symptoms are no better after nerve conduction studies and, therefore, nerve conduction studies can be omitted.

Neurophysiological Findings in Vibration-Exposed Male Workers

1999 ◽  
Vol 24 (2) ◽  
pp. 203-209 ◽  
Author(s):  
T. STRÖMBERG ◽  
L. B. DAHLIN ◽  
I. ROSÉN ◽  
G. LUNDBORG
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Carpal Tunnel ◽  
Nerve Conduction ◽  
Carpal Tunnel Release ◽  
Nerve Conduction Studies ◽  
Cold Intolerance ◽  
Temperature Thresholds ◽  
Tunnel Syndrome ◽  
Vibration Perception ◽  
Male Workers

Fractionated nerve conduction, vibrotactile sense, and temperature thresholds were studied in 73 symptomatic vibration-exposed male workers. Three symptomatic groups were distinguished: patients with isolated sensorineural symptoms; with isolated vasospastic problems; and with both. Clinical carpal tunnel syndrome occurred in 14 patients and abnormal cold intolerance (without blanching of the fingers) in 23. In the group as a whole, nerve conduction studies were abnormal in the median nerve but not in the ulnar nerve and vibration perception and temperature thresholds were impaired. Of the three symptomatic groups, patients with isolated sensorineural symptoms differed from controls. No differences were seen between patients with and without clinical carpal tunnel syndrome. With severe sensorineural symptoms the vibration perception thresholds, but not the values of the nerve conduction studies, were further impaired. The results indicated two injuries that are easily confused: one at receptor level in the fingertips and one in the carpal tunnel. Careful clinical assessment, neurophysiological testing, and examination of vibrotactile sense are required before carpal tunnel release should be considered in these patients.

LONGITUDINAL MEDIAN NERVE CONDUCTION STUDIES AFTER ENDOSCOPIC CARPAL TUNNEL RELEASE

Hand Surgery ◽  
1999 ◽  
Vol 04 (02) ◽  
pp. 145-149 ◽  
Author(s):  
Yukio Nakamura ◽  
Shigeharu Uchiyama ◽  
Hiroshi Toriumi ◽  
Hiroyuki Nakagawa ◽  
Tada-atsu Miyasaka
Keyword(s):  
Median Nerve ◽  
Carpal Tunnel ◽  
Nerve Conduction ◽  
Carpal Tunnel Release ◽  
Nerve Conduction Studies ◽  
Rapid Improvement ◽  
Endoscopic Carpal Tunnel Release ◽  
Idiopathic Carpal Tunnel Syndrome ◽  
Tunnel Syndrome ◽  
Open Carpal Tunnel Release

Forty hands of 36 patients who had undergone endoscopic carpal tunnel release (ECTR), utilising Chow's two-portal technique after being diagnosed with idiopathic carpal tunnel syndrome, were subjected to longitudinal median nerve conduction studies. The distal motor latency (DML) was examined pre-operatively on all the hands, which were re-examined at the post-operative 1st, 3rd, 6th and 12th months. Rapid improvement of DML was observed post-operatively in the first three months. These improvements patterns are not much different from those after open carpal tunnel release (OCTR) reported in the literatures. We consider that the data reported herein can be used as standards of DML course after ECTR.

scholarly journals Carpal tunnel syndrome: long-term nerve conduction studies in 261 hands

2009 ◽  
Vol 67 (1) ◽  
pp. 69-73 ◽  
Author(s):  
Dante Guilherme Velasco Hardoim ◽  
Guilherme Bueno de Oliveira ◽  
João Aris Kouyoumdjian
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Carpal Tunnel ◽  
Nerve Conduction ◽  
Sensory Nerve ◽  
Nerve Conduction Studies ◽  
Sensory Nerve Action ◽  
Tunnel Syndrome ◽  
The Mean ◽  
Compound Action

OBJECTIVE: To compare a long-term carpal tunnel syndrome (CTS) on nerve conduction studies (NCS) in hands treated non-surgically. METHOD: We retrospectively selected 261 symptomatic CTS hands (166 patients), all of them confirmed by NCS. In all cases, at least 2 NCS were performed in an interval greater than 12 months. Cases with associated polyneuropathy were excluded. NCS parameters for CTS electrodiagnosis included a sensory conduction velocity (SCV) <46.6 m/s (wrist to index finger, 14 cm) and distal motor latency (DML) >4.25 ms (wrist to APB, 8 cm). RESULTS: 92.8% were women; mean age was 49 years (20-76); the mean interval between NCS was 47 months (12-150). In the first exam, the median sensory nerve action potential (SNAP) and the compound action muscular potential were absent in 9.8% and 1.9%, respectively. In the second/last exam, SCV worsened in 54.2%, remained unchanged in 11.6% and improved in 34.2%. SNAP amplitude worsened in 57.7%, remained unchanged in 13.1% and improved in 29.2%. DML worsened in 52.9%, remained unchanged in 7.6% and improved in 39.5%. Overall, NCS parameters worsened in 54.9%, improved in 34.3% and remained unchanged in 10.8%. CONCLUSION: Long-term changing in NCS of CTS hands apparently were not related to clinical symptomatology and could lead to some difficulty in clinical correlation and prognosis. Aging, male gender and absent SNAP were more related to NCS worsening, regardless the mean interval time between the NCS.

scholarly journals Automatic Electrodiagnosis of Carpal Tunnel Syndrome Using Machine Learning

2021 ◽  
Vol 8 (11) ◽  
pp. 181
Author(s):  
Konstantinos I. Tsamis ◽  
Prokopis Kontogiannis ◽  
Ioannis Gourgiotis ◽  
Stefanos Ntabos ◽  
Ioannis Sarmas ◽  
...  
Keyword(s):  
Machine Learning ◽  
Decision Making ◽  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Nerve Conduction ◽  
Automatic Detection ◽  
Nerve Conduction Studies ◽  
Machine Learning Techniques ◽  
Tunnel Syndrome

Recent literature has revealed a long discussion about the importance and necessity of nerve conduction studies in carpal tunnel syndrome management. The purpose of this study was to investigate the possibility of automatic detection, based on electrodiagnostic features, for the median nerve mononeuropathy and decision making about carpal tunnel syndrome. The study included 38 volunteers, examined prospectively. The purpose was to investigate the possibility of automatically detecting the median nerve mononeuropathy based on common electrodiagnostic criteria, used in everyday clinical practice, as well as new features selected based on physiology and mathematics. Machine learning techniques were used to combine the examined characteristics for a stable and accurate diagnosis. Automatic electrodiagnosis reached an accuracy of 95% compared to the standard neurophysiological diagnosis of the physicians with nerve conduction studies and 89% compared to the clinical diagnosis. The results show that the automatic detection of carpal tunnel syndrome is possible and can be employed in decision making, excluding human error. It is also shown that the novel features investigated can be used for the detection of the syndrome, complementary to the commonly used ones, increasing the accuracy of the method.

scholarly journals When is needle examination of thenar muscle necessary in the evaluation of mild and moderate carpal tunnel syndrome?

2021 ◽  
Vol 67 (4) ◽  
pp. 518-525
Author(s):  
Zuhal Özişler ◽  
Müfit Akyüz
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Spontaneous Activity ◽  
Carpal Tunnel ◽  
Nerve Conduction ◽  
Sensory Nerve ◽  
Symptom Duration ◽  
Thenar Muscle ◽  
Distal Motor Latency ◽  
Motor Latency ◽  
Tunnel Syndrome

Objectives: This study aims to evaluate the predictors of standard nerve conduction study (NCS) parameters in determining the presence of axonal loss by means of spontaneous activity in patients with mild and moderate carpal tunnel syndrome (CTS). Patients and methods: Between May 2015 and April 2018, a total of 118 patients (11 males, 107 females; mean age: 52.3±10.6 years; range, 27 to 79 years) who underwent electrophysiological studies and were diagnosed with CTS were included. Demographic data of the patients including age, sex, and symptom duration were recorded. Electrodiagnostic studies were performed in all patients. All the needle electromyography (EMG) findings were recorded, but only the presence or absence of spontaneous EMG activities was used as the indicator of axonal injury. Results: In 37 (31.4%) of the patients, spontaneous activity was detected at the thenar muscle needle EMG. No spontaneous activity was observed in any of 43 (36.4%) patients with normal distal motor latency (DML). There were significant differences in DMLs, compound muscle action potential (CMAP) amplitudes, sensory nerve action potentials amplitudes, and sensory nerve conduction velocities between the groups with and without spontaneous activity (p<0.05). The multiple logistic regression analysis revealed that DML was a significant independent risk variable in determining presence of spontaneous activity. The most optimal cut-off value for median DML was calculated as 4.9 ms. If the median DML was >4.9 ms, the relative risk of finding spontaneous activity on thenar muscle needle EMG was 13.5 (95% CI: 3.6-51.2). Conclusion: Distal motor latency is the main parameter for predicting the presence of spontaneous activity in mild and moderate CTS patients with normal CMAP. Performing needle EMG of the thenar muscle in CTS patients with a DML of >4.9 ms may be beneficial to detect axonal degeneration in early stages.

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