Labor analgesia
Conditions
Interventions
A group:Chloroprocaine at 0.4% concentration
B group:Chloroprocaine at 0.6% concentration
C group:Chloroprocaine at 0.8% concentration
Dgroup:Chloroprocaine at 1.0% concentration
Sponsors
Women's Hospital School of Medicine Zhejiang University
Eligibility
Sex/Gender
Female
Age
20 Years to 40 Years
Inclusion criteria
Inclusion criteria: Healthy full-term singleton primigravida; 2-5 cm dilatation, 50 mm pain score on the visual analog scale for contraction pain; age 20-40 years; American Society of Anesthesiologists (ASA) class II; BMI 20-35 kg/m^2; and signed an informed consent form.
Exclusion criteria
Exclusion criteria: Contraindications to intrathecal anesthesia; comorbid pregnancy-related disorders (hypertension, diabetes mellitus, mild or severe preeclampsia, placental abruption, placenta previa, etc.); cardiopulmonary disease; hepatic or renal disease; history of chronic pain; history of narcotic drug abuse; fetal anomalies (malformations, stillbirth, etc.); psychiatric disorders; allergy to local anesthetics; refusal to participate in the study.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Pain score; | — |
Countries
China
Contacts
Public ContactChen Xinzhong
Women's Hospital School of Medicine Zhejiang University
Outcome results
None listed