Table 1 Day ACDF inclusion criteria

1. Age ≤ 70 years old

2. Diagnosed as DCS with initial surgery

3. Surgical level located at C3/4–6/7

4.A single operation segment ≤ 3

5. The spinal canal invasion rate measured on MRI < 50%

6. Failed conservative treatment for 6 months or symptoms worsen

7. No obvious cardiopulmonary and respiratory system major underlying diseases and bleeding disorders

8. ASA score < III

9. BMI < 35 kg/m²

10. Agree to perform daytime ACDF