RESUMEN
Objective To investigate the analgesic effect and motor block of ropivacayin combined dezocine in lower abodiminal operation.Methods Sixty patients of ASA Ⅰ - Ⅱ were divided into three groups randomly(n =20 for each group).They were treated with dezocine 5 mg +0.125％ ropivacayin/100 ml( group DI ),dezocine 5 mg +0.175％ ropivacayin/100 ml( group D2),dezocine 5 mg +0.225％ ropivacayin/100 ml (group D3 ).The initial dose was 5 ml,and the maintenance dose was 2 ml/h,with lock-out time of 20 mins,and the duration of patient-controlled epidermal analgesia (PCEA) was 48 h.The analgesic effect was evaluted by VAS score at 2,4,12,24 and 48 h after surgery.Bromage score and the side effects such as motor ability,and vomiting after surgery were recorded.Results At 2,4,12 h after surgery,the VAS scores of group D2 and D3 were less than that of group D1 (2.54 ± 1.34,2.47 ± 1.05 and 3.62 ± 1.02 at 2 hrs,2.13 ± 1.30,2.15 ± 1.28 and 3.56 ± 1.10 at 4 hrs,1.03 ± 0.43,1.04 ± 0.51 and 1.92 ± 1.20 at 12 hrs,respectively) ( Ps ＜ 0.05 ).As for the Bromage score among the 3 groups,there were no sighificant diffrences between group D1 and D2,wheras they were significantly lower than that in group D3 ( 1.21 ± 0.21,1.28 ±0.22 and 1.53 ± 0.31 at 2 hrs,1.15 ± 0.15,1.44 ± 0.25 and 1.61 ± 0.12 at 4 hrs,0.92 ± 0.14,0.99 ± 0.13 and 1.71 ± 0.22 at 12 hrs,0.85 ± 0.11,0.88±0.14 and (1.66±0.15) at 24 hrs,0.42 ± 0.10,0.55 ± 0.09 and 1.19±0.11 at 48 hrs,respectively,Ps ＜0.05).There were 2,2 and 3 patients affected with nausea and vomiting among the 3 groups,and there were no other side effects ( P ＞ 0.05 ).Conclusion 0.175％ ropivacayin combined with dezocine 5 mg via PCEA in lower abodiminal operation shows better analgesic effect and benefical to the restoration of lower limbs movements.