240
Participants
Start Date
June 1, 2022
Primary Completion Date
May 30, 2023
Study Completion Date
May 30, 2023
Hydromorphone
For those in H1 group: they will be administered with15 ug/ml hydromorphone, For those in H2 group: they will be administered with17.5 ug/ml hydromorphone , For those in H3 group: they will be administered with 20 ug/ml hydromorphone
Sufentanil
For those in SF group: they will be administered with 40 ug/ml sufentanil
Ropivacaine
0.08% ropivacaine will be co-administrated for epidural labor analgesia in four arms
Maternal and Child Health Hospital of Hubei Province, Wuhan
Maternal and Child Health Hospital of Hubei Province
OTHER