Effects of Crystal Solution and Colloid Solution on Mother and Fetus

Comparison of the Effects of Crystal Solution (Lactic Acid Ringer's Solution) and Colloid Solution (Hydroxyethyl Starch) on Mother and Fetus After Cesarean Section

Comparison of the effects of crystal solution (lactic acid Ringer's solution) and colloid solution (hydroxyethyl starch) on mother and fetus after cesarean section

The Hydroxyethl group use 10 ml/kg hydroxyethl starch as well as goal-directed fluid therapy with 3ml/kg hydroxyethl starch. The control group 10 ml/kg Lactated Ringer's solution as well as goal-directed fluid therapy with 3ml/kg Lactated Ringer's solution. During the whole operation of elective cesarean section

Inclusion Criteria:

• Healthy singleton pregnancy scheduled for elective cesarean section under CSEA; American Society of Anesthesiologists (ASA) physical status Ⅰ/Ⅱ; Age ranging from 20 to 40 years old.

Exclusion Criteria:

• History of mental disorder or epilepsy; History of central nervous system (CNS) disease; Preexisting or pregnancy-induced hypertension; History of lumber injury; Severe hypovolemia; Allergy or hypersensitivity to norepinephrine; Body mass index (BMI) above 40 kg/m2; Infection at the puncture site; Tricyclic or imipramine antidepressants.