Objective To explore clinical effect of sufentanil combined with ropivacaine in interscalene brachial plexus block by ultrasound-mediated.Methods 66 patients received the treatment of interscalene brachial plexus block were divided into group A,B and C randomly.Group A received traditional blind puncture interscalene brachial plexus block with ropivacaine;Group B received interscalene brachial plexus block with ropivacaine by ultrasound-mediated;Group C received interscalene brachial plexus block with combination of sufentanil and ropivacaine by ultrasound-mediated.The operation time,VAS score,pain and movement block onset time,anesthesia fine ratio and incidence of complications were observed and compared.Results The operation times of group B and C were significantly shortened compared with group A(all P ＜0.05) ;The pain and movement block onset time was shortened significantly in group B (all P ＜ 0.05),and more significantly in group C than those in group A (all P ＜ 0.05) ;The VAS score at 30min,60min and 120min after operation of brachial plexus block were significantly decreased in group C than those in group A and B (all P ＜ 0.05) ; Anesthesia fine ratio in group B and C significantly improved than that in group A (all P ＜ 0.05) ; Incidence of complications of group B and C was significantly lower than that in group A after operation of brachial plexus block (all P ＜ 0.05).Conclusion Sufentanil combined with ropivacaine in interscalene brachial plexus block by ultrasound-mediated has good effect and safety,and it can improve the onset time and effect of pain and movement block.

5.5mmol/L),persistent metabolic acidosis,or low cardiac output syndrome.Following data were collected in all patients:time to ni- tiation and duration of PD;time point of the recovery of urine output;baseline serum creatinine level(Cr0),rise of Cr(Crl),peak Cr (Cr2),descending Cr(Cr3),recovery of Cr(Cr4);and their corresponding postoperative time points.Results Of the 63 patients,58 (92.1%)required PD.Overall mortality rate was 33.3%(21/63).Patients undergone more complex surgery requiring longer aortic damping time;have higher Cr0,Cr2,Cr3 and longer period of the recovery of Cr and urine output(P6d)was associated with more complicated surgical procedure,higher Cr1 and Cr2,delayed recovery of Cr and urine output after surgery,longer period of low cardiac output syndrome,more dysfunctional organs,longer mechanical ventilation and ICU stay postoperatively(P