Acute pain often occurs after cesarean section, which can lead to stress and inflammatory response in the body, which will not only affect the postpartum recovery speed of the puerpera, but also inhibit the secretion of prolactin to a certain extent and reduce the secretion of milk. Epidural anesthesia is a common anesthesia method for cesarean section, which has the advantages of easy operation and little influence on the fetus. Preemptive analgesia can effectively block the transmission of harmful stimuli and reduce the degree of pain after cesarean section. Hydromorphone hydrochloride is a derivative of morphine, which has the advantages of rapid onset and good analgesic effect, and has been widely used in clinic. However, it is not clear whether epidural injection of hydromorphone hydrochloride for preanalgesia can bring clinical benefits to puerpera, and the optimal dose of hydromorphone hydrochloride for cesarean section is also unclear. The parturient women who met the inclusion criteria were randomly divided into 3 groups: control group, hydromorphone hydrochloride low-dose administration group and hydromorphone hydrochloride high-dose administration group. All women received epidural combined subarachnoid anesthesia. 15min before the end of the operation, the low-dose hydromorphone hydrochloride group was injected with 0.1mg hydromorphone hydrochloride in the epidural space, the high-dose hydromorphone hydrochloride group was injected with 0.3mg hydromorphone hydrochloride in the epidural space, and the control group was injected with 0.9% sodium chloride injection. Post-obstetric visual analogue scale (VAS) was followed up to record PCA compression times, gastrointestinal peristalsis recovery time, getting out of bed time, lactation time, and related adverse reactions.
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VAS score
Timeframe: 24 hours after surgery