Abstract: Objective To evaluate the effects of ultrasound-guided transverse abdominal muscle plane block on postoperative analgesia of liver. Methods 46 patients under liver surgery in The Second Affiliated Hospital of Mudanjiang Medical College from January 2021 to December 2021 were selected and divided into control group and research group by random number table method. Each group contained 23 patients. The research group was treated with ultrasound-guided transverse abdominal muscle plane block while the control group was injected with 0.9% sodium chloride injection. The postoperative VAS score, Ramsay score, heart rate, mean arterial pressure and the dosage of general anesthesia for the patients were compared. Results At the T0 stage, heart rates in both groups has no statistically significantly difference (P>0.05); At T1, T2, and T3 stages, the heart rate of the study group was significantly lower than that of the control group, and the difference was statistically significant (P<0.05); At the stage of T0, there was no statistically significantly difference in mean arterial pressure for the two groups, but at the stages of T1, T2 and T3, (P<0.05). And the dosages of sufentanil, propofol and remifentanil for the patients in research group were lower than control group (P<0.05). At the stage of T0, there was no statistically significant difference in Ramsay score among the two groups (P>0.05), whereas at the stages of T1, T2 and T3, research group afforded a higher Ramsay score than control group, the difference was statistically significant (P<0.05). In addition, though there was no statistically significant difference in VAS score between the two groups at T0 stage (P>0.05), at the stages of T1, T2 and T3 the VAS score of research group was statistically significantly difference with control group (P<0.05). Conclusion sTransverse abdominal muscle plane block applied to patients with liver surgery could promote the sedation effect, stabilize the postoperative heart rate and amean arterial pressure, and reduce the dosage of anaesthetic agents.

Key words: ultrasound guidance, transversus abdominis plane block, postoperative analgesia