ABSTRACT
Objective To compare the effects of Dexmedetomidine and Midazolam for sedation in elderly patient with upper cervical spine fracture in awake tracheal intubation.Methods A total of 68 patients with upper cervical spine fracture undergoing awake tracheal intubation who treated in our hospital from Jan.2010 to Jan.2015 were considered as the objects,who was randomly divided into group A and group B.34 cases in group A were treated with Dexmedetomidine for sedation,and the other 34 cases in group B were treated with Midazolam for sedation.The Heart rate (HR),mean arterial pressure (MAP) and BIS value on the before anesthesia (T1),immediately before intubation (T2),immediately after intubation (T3),PaCO2 in before and after intubation,and the adverse reactions were compared between the two groups.Results There was no difference in HR,MAP and BIS at time of T1 between the two groups (P＞0.05).The HR,MAP and BIS were lower in group A than in group B at time of T2 and T3 (P＜0.01).The PaCO2 had no difference between the two groups at before and after intubation (P＞ 0.05).The rate of adverse effects had no difference between the two groups (x2 =1.308,P =0.253).Conclusions Compared with Midazolam,Dexmedetomidine can stable HR,MAP and BIS effectively and has a good safety in the treatment of elderly upper cervical spine fracture in awake tracheal intubation,which is worthy of clinical application.
ABSTRACT
Objective To evaluate the effect of dexmedetomidine on the inflammatory responses in brain tissues in septic rats.Methods Seventy-two male Sprague-Dawley rats,aged 10 weeks,weighing 250-280 g,were randomly divided into 4 groups (n =18 each):control group (group C); sepsis group (group lipopolysaccharide (LPS)) ; distilled water group (group DW) and dexmedetomidine group (group D).Sepsis was induced by intraperitoneal injection of LPS 5 mg/kg (dissolved in normal saline 1 ml) in groups LPS,DW and DEX,while normal saline 1 ml was injected intraperitoneally in group C.Distilled water 20 μl was injected into the lateral cerebral ventricle in group DW,while dexmedetomidine 3 μg/kg (dissolved in distilled water 20μl) was injected into the lateral cerebral ventricle in group DEX.Six animals were sacrificed at 1,2 and 6 h after administration and hippocampi were removed for determination of TNF-α and IL-6 contents (by ELISA) and TLR4 mRNA expression in hippocampal tissues (by RT-PCR).Results Compared with group C,TNF-α and IL-6 contents in hippocampus tissues were significantly increased at each time point after administration in group LPS (P ＜ 0.05).Compared with group LPS,no significant change was found in TNF-α and IL-6 contents in hippocampal tissues (P ＞ 0.05),and TLR4 mRNA expression was significantly up-regulated at each time point after administration in group DW (P ＜ 0.05).Compared with group DW,TNF-α and IL-6 contents in hippocampal tissues were significantly decreased at each time point after administration,and TLR4 mRNA expression was significantly up-regulated at 2 and 6 h after administration in group DEX (P ＜ 0.05).Conclusion Dexmedetomidine can reduce inflammatory responses in brain tissues in septic rats via down-regulating TLR-4 mRNA expression.