Repair of multiple cervical root avulsion with sural nerve graft.
To obtain easier access to avulsed roots in the intradural space for patients suffering cervical root avulsion, the authors of this study developed a novel repair method. This involves using nerve grafts to bridge corresponding segments of the spinal cord and the trunk or cord level of the plexus, respectively, in two surgical stages. All eight patients admitted to this study received pre- and post-operative workups of electrophysiological evaluations and muscle power grading through Medical Research Council (MRC) scores. The degrees of impairment were also graded according to a modified version of Dumitru's and Wilbourn's scale (mild = 1; moderate = 2; severe = 3). The preoperative versus post-operative differences in the severity of the injuries and in the grading of the target muscle power were calculated according to the Wilcoxon signed-rank test. The preoperative degree of the severity of the injuries, as measured by electromyography (EMG), was 3.00 +/- 0.00 (mean +/- S.D.). The post-operative result was 2.125 +/- 0.641. Significant change took place after repair (P = 0.0313). Moreover, although little improvement was observed in the triceps, brachioradialis (BR), extensor carpi radialis (ECR), flexor digitorum profundus (FDP) and intrinsic hand muscles, the MRC grading showed significant yet not prominent motor recovery in the deltoid and biceps brachii (both P = 0.0313). We were impressed that the initial significant statistical results of differences in pre- and post-operative severity of the injuries and muscle power grading, demonstrated that regeneration does occur with this repair strategy.
Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, National Yang-Ming University, Taipei, Taiwan, ROC.
Sanford P C
SP
Hsu
Yang-Hsin
YH
Shih
Ming-Chao
MC
Huang
Tien-Yow
TY
Chuang
Wen-Cheng
WC
Huang
Hsiu-Mei
HM
Wu
Pei-Hsin
PH
Lin
Liang-Shong
LS
Lee
Henrich
H
Cheng
D000063:Accidents, Traffic; D000293:Adolescent; D000328:Adult; D001720:Birth Injuries / Q000534:rehabilitation / Q000601:surgery*; D020516:Brachial Plexus Neuropathies / Q000534:rehabilitation / Q000601:surgery*; D004185:Disability Evaluation; D004576:Electromyography; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011128:Polyradiculopathy / Q000534:rehabilitation / Q000601:surgery*; D012086:Reoperation; D013497:Sural Nerve / Q000637:transplantation*