240
Participants
Start Date
September 17, 2023
Primary Completion Date
October 17, 2023
Study Completion Date
October 17, 2023
Hydromorphone
For those in Group 1 : they will be administered with 15 ug/ml hydromorphone, For those in Group 2 : they will be administered with 17.5 ug/ml hydromorphone, For those in Group 3 : they will be administered with 20 ug/ml hydromorphone
Sufentanil
For those in Group 4 : they will be administered with 0.4 ug/ml sufentanil
Ropivacaine
0.08% ropivacaine will be co-administrated for epidural labor analgesia in four arms
RECRUITING
Maternal and Child Health Hospital of Hubei Province, Wuhan
Maternal and Child Health Hospital of Hubei Province
OTHER