Correlation between peripheral nerve injury and evoked electroneurographic changes in early stage
- VernacularTitle:周围神经损伤程度与伤后早期诱发神经电图改变的相关性
- Author:
Hailin XU
;
Baoguo JIANG
;
Fuqiang ZHAO
;
Hongbo ZHANG
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2005;9(5):195-197
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND: The injury of peripheral nerve may cause electroneurographic changes. However, what is the correlation between electroneurographic changes and the extent of nerve injury?OBJECTIVE: To probe into the changes of evoked electroneurography in early stage after nerve injury for clinical application and reference.DESIGN: Paired t-test in three groups of samples.SETTING: Department of Traumatic Orthopaedics People' s Hospital of Beijing University.MATERIALS:The trial was conducted in the Animal Center of the People's Hospital of Beijing University from August 2003 to December 2003. The subjects were 8 adult New Zealand rabbits of SPF grade(weighing 1.5 kg) and either gender from the Animal Center of Medical College of Beijing University.METHODS:The model of nerve injury was made in the 16 tibial nerves of the 8 rabbits, in which one third or two thirds of each nerve was ligated at the same transverse part. The samples were thus divided into three groups: non-injury (normal) group, 1/3 nerve injury group and 2/3 nerve injury group.MAIN OUTCOME MEASURES: The indices of evoked electroneurography, i. e. motor nerve condution velocity, negative M wave amplitude, negative M wave area, maximal M wave amplitude and maximal M wave area were measured in the three groups. The correlation between the extent of nerve injury and the 5 indices was analyzed.RESULTS: All the 5 indices of the 3 groups were significantly different( P＜ 0.05). The mean values of the 5 indices were 1.00 ±0.0,0.97 ±0.18,1.01 ±0.22;0.98 ±0.16 and 0.98 ±0.19 in normal group, 0.76 ±0.12,0.41 ± 0.24, 0.47 ± 0.30, 0.48 ± 0.27 and 0.50 ± 0.29 in 1/3 nerve injury group, and 0. 62±0. 10, 0. 11 ±0. 11, 0. 11 ±0. 10, 0. 12 ±0. 14 and 0.13± 0. 12 in 2/3 nerve injury group. The coefficient of correlation between the 5 indices and the injury were 0. 902, 0. 938, 0. 936, 0. 907, and 0. 914, respectively.CONCLUSION: In the early stage after peripheral nerve injury, the electroneurographic indices negatively correlate with the extent of nerve injury. The negative M wave amplitude and area are relatively more closely correlated with the extent of injury.
