Effect of Epidural Catheter Retention Depth on Labor Analgesia Performed in DPE Combined With PIEB Model
Conditions
Interventions
- PROCEDURE: The indwelling length of epidural catheter is 3 centimeters.
- PROCEDURE: The indwelling length of epidural catheter is 5 centimeters.
- PROCEDURE: The indwelling length of epidural catheter is 7 centimeters.
Sponsor
General Hospital of Ningxia Medical University