Risk factors for non-fusion segment disease after anterior cervical spondylosis surgery: a retrospective study with long-term follow-up of 171 patients

Retrospective Analysis of Sagittal Balance Parameters and Clinical Efficacy After Short-Segment Anterior Cervical Spine Surgery with Different Fusion Devices

Objective

To compare the cervical sagittal balance parameters and clinical efficacy of three fusion devices after short-segment anterior cervical discectomy and fusion.

Patients and Methods

Retrospectively analyzed 516 patients with cervical spondylosis who underwent surgery at our hospital from May 2013 to May 2019. All patients had complete data and were divided into three groups according to the selected fusion cage. Neck and upper limb pain were assessed by the visual analog scale (VAS) score. Neurological function was evaluated by the modified Japanese Orthopedics Society (mJOA) score. Also, the curvature of the cervical spine and the occurrence of dysphagia were observed.

Results

There were no significant differences in the general information, thoracic inlet angle, T1 slope, or surgical data among the groups (p>0.05). There were significant differences in the scores between pre- and postoperatively in the different groups (p<0.05). There were no significant differences in the C2-C7 Cobb angle or C2-C7 sagittal vertebral axis before the operation among the groups (p>0.05). There was a significant difference in the correction and loss of correction among the groups postoperatively and on follow-up (p>0.05). Dysphagia was less likely in the Zero-P VA fusion group than in the other two groups.

Conclusion

Different fusion instruments can relieve the symptoms. In the Prodisc-C Vivo group, no significant improvement in cervical sagittal balance was achieved. A good effect on improving sagittal balance was observed in both the Zero-P VA fusion and Skyline anterior cervical titanium plate groups, but a better effect on preventing dysphagia was observed in the Zero-PVA fusion group.

Anterior Cervical Discectomy and Fusion Complications and Thirty-Day Mortality and Morbidity

Background

Anterior cervical discectomy and fusion (ACDF) is a commonly used procedure. However, few studies reported post-operative complications. This study looks into the prevalence of possible complications and the mortality rate in the first 30 days postoperatively. 

Methods

A retrospective review of patients who underwent ACDF for degenerative disc disease from 2008-2017, in a single center in Riyadh, Saudi Arabia was performed. Patient demographic data, comorbidities, operative notes, immediate and delayed complications were all collected, with a minimum of 30 days follow-up. 

Results

Out of 434 medical charts reviewed, 163 met the inclusion criteria. Mean population age was 52 ± 11 years. Elective cases comprised 90% of sample and most patients had one or two levels operated on, 95% had ACDF and only 5% had corpectomy. The drain was left in 69% of patients and planned intensive care admission was done for 3%. Instrumentation and graft was used, with 92% needing a cage plus plate. Intraoperative complications were minimal. Mean hospital stay was 12.5 ±18 days. Majority of population had no complications in a 30 days period (98.2%). Only one case underwent revision surgery. 

Conclusions

While ACDF is considered a safe procedure, postoperative complications may have long-term implications. This study showed minimal complications in the immediate postoperative period, but due to the limited sample size, a study with larger population is needed to further confirm the results.

Clinical significance of microsurgical excision of the posterior longitudinal ligament using a high-frequency electrosurgical excision procedure in anterior cervical discectomy and fusion

Introduction

Anterior cervical decompression and fusion surgery using traditional methods to remove the posterior longitudinal ligament often causes massive bleeding, increasing the risk of surgery. However, the use of a high-frequency electrotome under the microscope can significantly reduce bleeding and reduce the risk of surgery.

Aim

To explore the clinical significance of electrosurgical excision of the posterior longitudinal ligament in the cervical anterior approach under the microscope.

Material and methods

From December 2015 to December 2017, patients who underwent anterior cervical discectomy and fusion at our hospital were followed up. We enrolled 73 men and 50 women who were 30 to 74 years old (mean, 49.96 years). Among 67 patients in group A treated with a high-frequency electrosurgical knife under the microscope, 58 were followed up; among 73 patients in group B treated with a traditional cervical hook knife under the microscope, 65 were followed up. Clinical data, operative time, intraoperative bleeding volume, VAS score, and Japanese Orthopaedic Association (JOA) improvement rate were retrospectively analyzed.

Results

There were significant differences in the mean operative time and intraoperative bleeding volume between the two groups (p < 0.05); however, no significant differences were found in the incidence of cerebrospinal fluid leakage, JOA improvement rate at 3 months postoperatively, and VAS score at 3 months postoperatively between the two groups (p > 0.05).

Conclusions

Electrosurgical resection of the posterior longitudinal ligament of the cervical vertebrae under the microscope can significantly reduce intraoperative bleeding and shorten the operative time and has obvious advantages compared with traditional methods.