Abstract: Objective To study the effect of ultrasound-guided posterior transversus abdominis plane block (TAPB) on analgesia after cesarean section.Methods From July to October 2019,60 parturients undergoing cesarean section under the combined spinal and epidural anesthesia in Boai Hospital of Zhongshan were selected as the research objects and they were divided into the experimental group (30 cases) and the control group (30 cases) according to the random number table method.After the operation,both groups received patient-controlled intravenous analgesia (PCIA),and the experimental group received ultrasound-guided posterior TAPB after the operation.The rest and dynamic visual analogue scale (VAS) scores at 4,8,12,24,and 48 hours after surgery,the dosage of Sufentanil,the frequency of patientcontrolled analgesia compressions,the occurrence of adverse reactions,and satisfaction score were compared between the two groups,and the occurrence of complications related to TAPB operation in the experimental group was observed.Results The rest and dynamic VAS scores of the experimental group at 8,12,and 24 hours after surgery were lower than those of the control group,at 0-23 hours after surgery,the dosage of Sufentanil and the frequency of self-controlled analgesia compressions in the experimental group were less than those in the control group,the differences were statistically significant (P<0.05).The dosage of Sufentanil in the experimental group was less than that in the control group at 24 to 48 hours after surgery,and the satisfaction score was higher than that in the control group,the differences were statistically significant (P<0.05).There was no statistically significant difference in the incidence of adverse reactions (nausea and vomiting,dizziness,skin itching,respiratory depression and urinary retention) between the two groups (P>0.05).No complications related to TAPB operation occurred in the experimental group.Conclusion Ultrasound-guided posterior TAPB can effectively reduce the postoperative pain of parturients after cesarean section,with longer duration of analgesia (24 hours),higher safety and satisfaction.
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