A Comparison of Different Concentration Ropivacaine for Patient-controlled Epidural Analgesia

A Comparison of Different Concentration Ropivacaine Combination With Fentanyl for Patient-controlled Epidural Analgesia After Cesarean Delivery

To compare the postoperative analgesic effect and the intensity of motor block in different concentration ropivacaine plus fentanyl when used epidurally with a patient-controlled analgesia device after Cesarean delivery.

1. Written informed consent must be obtained before any study specific procedures are undertaken.
2. All patients were received epidural anesthesia with 2% Lidocaine and patient-controlled epidural analgesia (PCEA) for post- operative pain control. PCEA randomly allocated into three groups. Group A patients received 0.08% ropivacaine plus 4 mcg /mL fentanyl, Group B patients received 0.08% ropivacaine plus 2mcg /mL fentanyl, and Group C patients received 0.16 % ropivacaine plus 2 mcg /mL fentanyl. Dermographic data, dosage of PCEA during first 48 hours post-operation，NRS scores, patient satisfaction and the intensity of motor block will be recorded and analyzed.

Inclusion Criteria:

• Female undergoing elective Cesarean delivery and receive patient-controlled epidural analgesia

Exclusion Criteria:

• With the comorbidity of chronic heart, lung, liver and renal disease, chronic alcoholism, allergy to ropivacaine, poor epidural function and combine other anesthesia method