Prolonged median distal sensory nerve action potential duration in carpal tunnel syndrome

2021 ◽  
Vol 63 (5) ◽  
pp. 710-714
Author(s):  
Jie Yang ◽  
Ke Chen ◽  
Ying Liu ◽  
Yin Yang
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Action Potential ◽  
Carpal Tunnel ◽  
Action Potential Duration ◽  
Sensory Nerve ◽  
Sensory Nerve Action Potential ◽  
Nerve Action ◽  
Sensory Nerve Action ◽  
Tunnel Syndrome

scholarly journals Clinical predictors of surgical outcomes of severe carpal tunnel syndrome patients: utility of palmar stimulation in a nerve conduction study

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Yuichi Sasaki ◽  
Tohru Terao ◽  
Emiko Saito ◽  
Keiichiro Ohara ◽  
Shotaro Michishita ◽  
...  
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Action Potential ◽  
Carpal Tunnel ◽  
Compound Muscle Action Potential ◽  
Sensory Nerve ◽  
Sensory Nerve Action Potential ◽  
Muscle Action ◽  
Muscle Action Potential ◽  
Sensory Nerve Action ◽  
Tunnel Syndrome

Abstract Background Carpal tunnel syndrome is a common peripheral nerve compression disorder. However, there is no established opinion regarding the predictors of symptom improvement after surgery. This study aimed to identify the predictors of surgical outcomes of severe carpal tunnel syndrome patients. Methods In the patients who underwent a carpal tunnel syndrome surgery, we selected the patients who had a preoperative Bland’s classification of grade 5 or 6, and assessed for the changes in Bland’s classification grade before and after surgery. Those who showed improvement from preoperative grades 5–6 to postoperative grades 1–4 comprised the improvement group. In contrast, those who did not show improvement and had postoperative grades 5 or 6 comprised the non-improvement group. In a nerve conduction study, amplitudes of the compound muscle action potential and sensory nerve action potential of the palms were assessed between the improvement and non-improvement groups. Results Among the 60 hands of 46 patients who had a preoperative Bland’s classification of grade 5 or 6, 49 hands of 37 patients comprised the improvement group, and 11 hands of 9 patients comprised the non-improvement group. The amplitudes of the compound muscle action potential and sensory nerve action potential of the palms before surgery were significantly higher in the improvement group. The degree of improvement in Bland’s classification grade was correlated with the degree of clinical symptom improvement. Conclusions Amplitudes of compound muscle action potential and sensory nerve action potential before surgery induced by palmar stimulation can predict improvements in nerve conduction study scores and clinical findings after surgical treatment.

scholarly journals Electrophysiological diagnosis using sensory nerve action potential for the intraforaminal and extraforaminal L5 nerve root entrapment

2012 ◽  
Vol 22 (4) ◽  
pp. 833-839 ◽  
Author(s):  
Muneharu Ando ◽  
Tetsuya Tamaki ◽  
Mamoru Kawakami ◽  
Akihito Minamide ◽  
Yukihiro Nakagawa ◽  
...  
Keyword(s):  
Action Potential ◽  
Nerve Root ◽  
Sensory Nerve ◽  
Sensory Nerve Action Potential ◽  
Nerve Action ◽  
Sensory Nerve Action ◽  
Nerve Root Entrapment

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.

Close relationship between cardiovagal function and sural sensory nerve action potential in type 2 diabetes

2019 ◽  
Vol 130 (7) ◽  
pp. 1160-1165
Author(s):  
Yun-Ru Lai ◽  
Chih-Cheng Huang ◽  
Wen-Chan Chiu ◽  
Rue-Tsuan Liu ◽  
Nai-Wen Tsai ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Action Potential ◽  
Sensory Nerve ◽  
Sensory Nerve Action Potential ◽  
Nerve Action ◽  
Close Relationship ◽  
Sensory Nerve Action
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