Abstract:Objective To compare the anesthetic effect of anterior serratus plane block and thoracic paravertebral nerve block in patients undergoing thoracoscopic surgery and its effect on pain factors.Methods From November 2020 to September 2021, 60 patients who received thoracoscopic surgery in our hospital were selected as the research objects, and were randomly divided into group A and group B with 30 cases each. Two groups of patients received general anesthesia with endotracheal intubation during operation. Before anesthesia induction, group A underwent anterior serratus block and group B underwent thoracic paravertebral nerve block. The anesthetic effect, anesthesia plane,block operation time, block onset time, block duration, vital signs index, postoperative analgesia pump compression times, postoperative sufentanil consumption, pain factor index, postoperative pain score, and postoperative adverse reaction rate were compared between the two groups.Results The excellent and good rate of anesthesia was 96.67% in Group A and 93.33% in group B,which were no significant between two groups (P > 0.05). There was no significant difference between the two groups in terms of anesthesia level and block onset time (P > 0.05), but the block operation time of group A was shorter than that of group B (P < 0.05), and the block duration of group A was longer than that of group B (P < 0.05). The systolic blood pressure, diastolic blood pressure, and heart rate between the two groups had no significant changes after skin incision compared with those before skin incision (P > 0.05). The pressing times of analgesic pump and the use of sufentanil in group A within 48 hours after operation were less than those in group B (P < 0.05). The difference of serum PGE2 and IL-6 between the two groups before and after operation was statistically significant (P < 0.05). There were differences in VAS scores between the two groups at different time points after operation in the state of rest and cough (P < 0.05). There was no significant difference in the incidence of postoperative adverse reactions between the two groups (P > 0.05).Conclusion Both the anterior serratus muscle plane block and thoracic paravertebral nerve block can play a good anesthetic blocking role in thoracoscopic surgery, and effectively maintain the stability of vital signs during operation. However, compared with thoracic paravertebral nerve block, the anterior serratus muscle plane block can shorten the blocking time, prolong the blocking duration, reduce the release of postoperative pain factors, achieve good postoperative analgesic effect, and reduce the dosage of opioid analgesics after operation, with few adverse reactions.