Few methods were available to determine which muscle groups are associated with PD in details in previous investigations. Local steroid administration has shown some effects on PD in a large number meta-analysis. In this study, we aimed to conduct a prospective randomized-double blinded study to exam the efficacy and the safety of the local steroid administration on ACDF patients by using high resolution impedance manometry in patients receiving ACDF.

Postoperative dysphagia (PD) is the most common complication after anterior cervical discectomy and fusion (ACDF). However, few methods were available to determine which muscle groups are associated with PD in details in previous investigations. Local steroid administration has shown some effects on PD in a large number meta-analysis. In this study, we aimed to conduct a prospective randomized-double blinded study to exam the efficacy and the safety of the local steroid administration on ACDF patients, and the also apply the high resolution impedance manometry (HRIM) on patients receiving ACDF for better delineation of the swallowing function. Pressure-flow analysis (PFA), derives pharyngeal pressure flow variables obtained from HRIM were used to analyze the mechanisms of PD.

Inclusion Criteria:

• patients undergoing elective anterior cervical spine surgery

Exclusion Criteria:

• patients receiving spine surgery not at the first time
• patients with head and neck cancer
• patients receiving other surgeries at head and neck region
• patients had previous swallowing difficulty history

due to ethic concern