| Effect of Radiofrequency Lesioning on Peripheral Nerve Conductivity in Relation to Distance between Lesioning Electrode and Target Tissue in Rats. |
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Ko, Hyun Yoon , Shin, Yong Beom , Lee, Sang Hyo , Moohn, Ha Noon , Kwon, Dong Rak , Ahn, Young Hyun |
1Department of Rehabilitation Medicine, Pusan National University College of Medicine, Korea. hyko@pusan.ac.kr
2Department of Rehabilitation Medicine, College of Medicine, Inje University, Korea. |
| 흰쥐 좌골신경과 고주파열응고차단 탐침간 거리에 따른 신경전도의 변화 |
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고현윤, 신용범, 이상효1, 문하눈, 권동락, 안영현 |
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부산대학교 의과대학 재활의학교실, 1인제대학교 의과대학 재활의학교실산대학교 의과대학 재활의학교실, 1인제대학교 의과대학 재활의학교실 |
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| Abstract |
Objective
To investigate neurophysiologic changes of peripheral nerves, which were injured by radiofrequency thermocoagulation and evaluate an effective distance between the lesioning electrode and target nerve tissue.
Method
Thirty Sprague-Dawley rats were used and divided into three groups by the distance between the lesioning electrode and the sciatic nerve: 2 mm, 4 mm, 6 mm for each group (10 rats for each group). Radiofrequency lesioning was performed with 1.5 Volt, 1 MHz-frequency and 1 ms duration current for 90 sec. On the first and the fifth day after radiofrequency lesioning, latencies and amplitudes of compound muscle action potential were compared with the baseline values.
Results
No statistically significant latency change was observed on the first and the fifth day after lesioning. The amplitude was significantly reduced in group I and II on the first and the fifth day after lesioning, in contrast that, there was no significant change in the group III.
Conclusion
There was significant decrement in the amplitude after effective radiofrequency lesioning to the sciatic nerve with the distance of 4 mm or less. However, changes of the latencies was not significant. It was suggested that effective distance between raidiofrequency lesioning electrode and target peripheral nerve was 4 mm or less. (J Korean Acad Rehab Med 2004; 28: 449-453) |
| Key Words:
Radiofreqency lesioning, Effective distance, Neurophysiologic change, Peripheral nerve |
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