Abstract:Objective To compare the effect of two nerve blocks methods under ultrasound guidance on inflammatory response and immune function of patients undergoing thoracoscopic lobectomy, in order to provide reference for analgesic treatment of patients.Methods The clinical data of 114 patients who underwent thoracoscopic lobectomy from Jan. 2020 to Jul. 2021 were selected, and 1 case was excluded from the study and 113 patients were finally included, which were divided into group A (n = 57) and group B (n = 56) depending on the type of anesthesia. The block under ultrasound guidance was performed in both groups, with thoracic paravertebral nerve block in group A and erector spinal plane block in group B. The perioperative conditions, the levels of related indexes of inflammatory, stress and immune reaction, and untoward effect were compared of both groups.Results The perioperative related indicators between the both groups were not apparently different (P > 0.05); The interleukin-10 (IL-10), IL-6, IL-1β, cortisol (Cor), norepinephrine (NE) and CD8+ levels of both groups at the end of surgery (T1) and 24 h after surgery (T2) were apparently increased compared with those before surgery (T0) (P < 0.05), the CD3+, CD4+ and CD4+/CD8+ levels were apparently decreased compared with those at T0 (P < 0.05), and the above indicators levels of group A were apparently higher in comparison with those of group B (P < 0.05); The incidence of adverse reactions of group A was apparently lower in comparison with that of group B (P < 0.05).Conclusion The application of thoracic paravertebral nerve block under ultrasound guidance in patients undergoing thoracoscopic lobectomy was helpful to reduce the stress and inflammatory response of body, and has less impact on immune function of patients, with good safety.