Objective: To review the research progress of C 5 palsy (C 5P) after cervical surgery, providing new clinical intervention ideas for the C 5P patients.
Methods: The relevant literature domestically and abroad was extensively consulted and the latest developments in the incidence, risk factors, manifestations and diagnosis, prevention, and intervention measures of C 5P were systematically expounded.
Results: C 5P is characterized by weakness in the C 5 nerve innervation area after cervical decompression surgery, manifested as limited shoulder abduction and elbow flexion, with an incidence rate more than 5%, often caused by segmental spinal cord injury or mechanical injury to the nerve roots. For patients with risk factors, careful operation and preventive measures can reduce the incidence of C 5P. Most of the patients can recover with conservative treatment such as drug therapy and physical therapy, while those without significant improvement after 6 months of treatment may require surgical intervention such as foraminal decompression and nerve displacement.
Conclusion: Currently, there has been some advancement in the etiology and intervention of C 5P. Nevertheless, further research is imperative to assess the timing of intervention and surgical protocol.
目的: 综述颈椎术后C 5麻痹（C 5 palsy，C 5P）研究进展，为临床治疗C 5P患者提供参考。.
方法: 广泛查阅国内外颈椎术后C 5P相关文献，系统性阐述C 5P发病机制、危险因素、临床表现及诊断、预防、治疗措施新进展。.
结果: C 5P为颈椎术后出现的C 5神经支配区肌肉无力，表现为肩外展、屈肘受限，发生率>5%，可能由节段性脊髓损伤或神经根机械损伤导致。对于存在危险因素患者，术中仔细操作及采取预防性措施可减少术后C 5P的发生。大部分患者经药物治疗、物理治疗等保守治疗后功能可恢复，6个月以上无明显好转者可予以手术干预，可选用椎间孔减压、神经移位等手术方案。.
结论: 有关C 5P发病机制及预防措施等已取得一定研究进展，但对于干预时机和手术方式仍需进一步研究。.
Keywords: C5 palsy; cervical surgery; complication; nerve root injury.