Abstract:

Abstract:Objective Through C7 vertebrae channel to treat contralateral C7 brachial plexus root avulsions  to provide a new method to treat brachial plexus root avulsions.Methods 20 corpses were used to compare the lengths of the prespinal and retropharyngeal way and  C7 vertebrae channel way.30 CT scan pictures of adult human neck were selected to measure the maximum angel of cervical vetebrae and lateral maximum angel of cervical vetebrae.36 isolated fresh vertebrae of C5-C7 were chosen as test pieces,and were divided into control group and experimental group which was perforated.　A axial ultimate load compression was performed in all subjects.A comparison was made to figure out the biomechanical difference between the intact and perforated vertebrae.Results The length through vertebrae channel to contralateral inferior trunk was 69.19 mm,25.14 mm shorter than the average length of C7 nerve.T1 and C7 angle of vertical was 9.4°±0.3°.T1 and C7 drag amplitude of vertical was 2.44 mm.T1 and C7 drag amplitude of lateriflection was 0.156 mm.The maximum load of  cervical vetebrae construction test in experimental group was decreased by 14.89% compared with control group,but there was no significant difference(P> 0.05).Conclusion Through C7 vertebrae channel   enough length of brachial plexus is obtained to treat brachial plexus root avulsions of contralateral.

Key words: brachial plexus;injury of nerve root;vertebrae channel way;biomechanics