利多卡因对失血性休克兔肺损伤的保护作用

目的 探讨利多卡因对失血性休克兔肺损伤的保护作用.方法 18只兔随机分为3组,每组6只:利多卡因组(L组)、失血性休克组(H组)和对照组(C组).L组于放血前静脉注射2.5 mg/kg利多卡因,此后每隔1 h静脉注射1 mg/kg利多卡因维持;L组与H组建立失血性休克模型后,分别于放血前(T0)、休克2 h(T1)、复苏2 h(T2)各从股静脉取血测定血浆丙二醛(MDA)、超氧化物歧化酶(SOD);C组在上述对应时间点测定血浆MDA和SOD.3组动物复苏2 h后处死,取左上肺测肺组织的湿/于重比值(W/D).结果 H组与L组在T1、T2时点,与T0时点及C组相比,MDA含量均显著升高(P＜0.05),L组MDA低于H组(P＜0.05);SOD含量则显著下降(P＜0.05),L组SOD高于H组(P＜0.05);L组肺组织W/D比值低于H组而高于C组(P＜0.05).结论 早期静脉注射利多卡因可抑制MDA产生,增加SOD含量,降低肺含水量,从而减轻失血性休克兔肺组织的损伤.

Protective effects of lidocaine against lung injury after hemorrhagic shock in rabbits

Objective To study the protective effect of lidocaine against lung injury after hemorrhagic shock in rabbits. Methods Eighteen healthy rabbits were randomly divided into 3 groups (n=6), namely lidocaine group (group L), hemorrhagic shock group (group H) and control group (group C). Hemorrhagic shock model was established in rabbits in groups L and H, and the venous blood samples were collected for measurement of plasma malondialdehyde (MDA) and superoxidedismutase (SOD) before phlebotomy (T0), 2 h after hemorrhagic shock (T1) and 2 h after resuscitation (T2). Blood samples were also taken for measurement of MDA and SOD at the same time points in group C. The wet to dry weight ratio of the lung (W/D) was measured at T2. Results MDA level was significantly lower while SOD level significantly higher in group L than in group H (P<0.05). The W/D ratio in group L was reduced significantly as compared with that in group H (P<0.05). Conclusion Lidocaine can remarkably alleviate lung injury after hemorrhagic shock by inhibiting MDA production and increasing SOD content.