亚甲蓝在重度失血性休克中的治疗效果

目的研究亚甲蓝在重度失血性休克中的治疗效果。方法采用兔失血性休克-复苏模型,分为休克组、亚甲蓝组（复苏时应用亚甲蓝）,观察休克前后肿瘤坏死因子α（TNFα）、白细胞介素（IL）-6、IL-8、一氧化氮（NO）、乳酸（LA）、平均动脉压（MAP）的变化,及动物12h存活率。结果动物失血性休克后,血浆TNFα、IL-6、IL-8、NO、LA水平较休克前显著升高（P〈0．01）;复苏后,亚甲蓝组动物MAP明显高于休克组（P〈0．01）,而血浆中TNFα、IL-6、IL-8、NO、LA水平显著低于休克组（P〈0．01）;两组动物的存活率差异无显著性。结论尽管亚甲蓝未改善重度失血性休克动物的预后,但能帮助升高并维持休克动物的血压,对休克的治疗有一定价值。

Effects of methylene blue on refractory hemorrhagic shock

OBJECTIVE: To evaluate the effects of methylene blue (MB) on refractory hemorrhagic shock. METHODS: Totally 24 rabbits subjected to prolonged hemorrhagic shock and resuscitation were randomly divided into hemorrhagic shock group (12 rabbits) and MB group (12 rabbits; MB was administered immediately after resuscitation was performed). The plasma levels of tumor necrosis factor alpha (TNFalpha) , interleukin (IL)-6, IL-8, nitric oxide (NO), lactic acid (LA) , and mean arterial pressure (MAP) were detected before shock, immediately after resuscitation, and 0.5, 2, and 4 hours after resuscitation. The 12-hour survival rates were observed. RESULTS: The plasma levels of TNFalpha, IL-6, IL-8, NO and LA after shock were significantly higher than before shock (P <0.01), and maintained at high levels. Compared with the shock group, higher MAP and lower plasma levels of TNFalpha, IL-6, IL-8, NO, and LA were observed in the MB group after resuscitation (P<0.01). The 12-hour survival rates were not significantly different between shock group and MB group. CONCLUSION: Although MB can not improve the prognosis of refractory hemorrhagic shock, it can increase and maintain the MAP and thus play a beneficial role in the treatment of hemorrhagic shock.