To investigate the effect of propofol intra-aortic and intravenous infusion on the concentration of propofol for an ischemia-reperfusion spinal cord injury in rabbits. Methods Forty-six healthy adult New Zealand white rabbits were randomly divided into 3 groups: sal ine infusion group (group N, n=10), propofol intra-aortic infusion group (group A, n=16) and propofol intravenous infusion group (group V, n=16). The infrarenal abdominal aorta was occluded for 30 min during which propofol 50 mg/kg was infused continuously intra-aortic or intravenous with a pump in group A and V. In group N, the same volume of normal sal ine was infused in the same way and at the same rate as in group A. Upon reperfusion, propofol concentration of the spinal segments of L4-6 and T6-8 was examined in group A and V. At 48 hoursafter reperfusion, the neurological outcomes were recorded in each group. Results Mean blood pressure in group V from the time of 5 minutes after occlusion decreased more than in group N (P lt; 0.05) and than in group A from the time of 10 minutes after occlusion(P lt; 0.05). The mean blood pressure in group N increased more than in group A from 15 minutes after occlusion (P lt; 0.05). The heart rate increased more in group V from 10 minutes after occlusion than in group N and A (P lt; 0.05) in which no difference was observed. The propofol concentration in L4-6 of group A (26 950.5 ± 30 242.3) ng/g was higher than that in T6-8 of group A (3 587.4 ± 2 479.3) ng/g and both L4-6 (3 045.9 ± 2 252.9) ng/g and T6-8 (3 181.1 ± 1 720.9) ng/g of group V(P lt; 0.05). The paraplegia incidence was lower (30%) and the median of normal neurons was higher (8.4) in group A than in group N (80%, 2.2) and group V(100%, 1.9), (P lt; 0.05). There was no significant difference in group N and V in paraplegia incidenceand the median of normal neurons (P gt; 0.05). Conclusion Intra-aortic infusion shows a better neurological outcome than intravenous infusion and could contribute to higher concentration of propofol in the ischemia spinal cord.
Objective To assess the safety and efficacy of sufentanil combined with propofol for painless fiberbronchoscopy. Methods A total of 120 patients undergoing fiberbronchoscopy were divided into two groups according to their admission sequence: group S (sufentanil + propofol, n=60) and group F (fentanil + propofol, n=60). Parameters including heart rate (HR), systol ic blood pressure (SBP), diastol ic blood pressure (DBP), saturation of blood oxygen (SPO2), dose of propofol, duration of the procedure, waking time and score of Observer’s Assessment of Alertness/Sedation (OAA/S) scale were recorded. Results The HR increased significantly 3 minutes after drug administration in both groups (Plt;0.05). The SPO2 decreased significantly 3 minutes after drug administration in both groups (Plt;0.05). The average dose of propofol and OAA/a score were similar between the two groups (Pgt;0.05). The waking time was significantly shorter in group S than in group F (Plt;0.05). Conclusion Sufentanil combined with propofol could offer a good sedative/analgesic effect during painless fiberbronchoscopy.
To investigate the protective effect of propofol on ischemia/reperfusion induced spinal cord injury in rabbits and its influence on excitatory amino acid (EAA). Methods Sixty New Zealand white rabbits weighing 2.0-2.5 kg, half males and half females, were selected. The infrarenal circumaortic clamping model was used. And 6 mL/kg different fluids were continuously infused through a catheter into the aorta distal to the clamping site at a speed of 12 mL/(kg•h) during the 30 minutes ischemia period. According to the different infusing l iquids, the rabbits were randomized into 6 groups(n=10 per group): group A, normal sal ine; group B, 10% intral ipid; group C, propofol 30 mg/kg; group D, propofol 40 mg/kg; group E, propofol 50 mg/kg; group F, propofol 60 mg/kg. At 0, 6, 24, and 48 hours after reperfusion, neurologic outcomes were scored on a Tarlov scale system. At 48 hours after reperfusion, the number of normal neurons in the anterior spinal cord was counted, and concentration of EAA in the lumbar spinal cord was measured by high performance l iquid chromatography. Results The neuroethological score was better in groups C, D, E and F than that of groups A and B (P lt; 0.05), the score of group E was the highest (P lt; 0.05), and there was no significant difference between group A and group B (P gt; 0.05). The number of normal neurons in the anterior spinal cord of groups C, D, E and F was greater than that of groups A and B (P lt; 0.05), and group E was greater than groups C, D and F (P lt; 0.05). The concentration of EAA in groups A, B, C, D, E and F was greater than that of normal tissue, the group E was the lowest (P lt; 0.05), the groups A and B were the highest (P lt; 0.05), and there was no significant difference between group A and group B (P gt; 0.05). Concentrations of glutamate and aspartic acid were negatively correlated to normal neuron numbers in the anterior spinal cord and neuroethological scores 48 hours after reperfusion, and the corresponding correlation coefficient was — 0.613, — 0.536, — 0.874 and — 0.813, respectively (P lt; 0.01). Conclusion Propofol can significantly inhibit the accumulation of EAA in spinal cord and provide a protective effect against the ischemia/reperfusion injury induced spinal cord in rabbits.
目的:探讨老年手术患者椎管内麻醉后应用异丙酚镇静,脑电双频指数、异丙酚血药浓度和镇静深度之间的相关性［1］。方法:48例ASAⅠ~Ⅱ级择期手术患者,分为老年组(65~85岁)和年轻组(18~40岁),每组24例。为尽快达到稳态血药浓度,采用靶控输注方式给药。异丙酚靶浓度从0.5 μg/mL起逐渐增加,直至患者对轻推无反应(意识消失),每个浓度维持5min。连续记录EEG参数,在每一稳态血药浓度末,记录BIS、95%SEF, 桡动脉取血(高效液相色谱法测定异丙酚血药浓度),并评定镇静深度(OAA/S评分法)。用Spearman’s等级相关进行相关分析,并计算预测概率 (Pk) 值。结果:两组BIS (r=0.935~0.955) 与镇静水平的相关性优于血药浓度(r =0.849~0.870)和95%SEF(r =0.503~0.571),BIS的Pk值高(0.942~0.972)。在同一镇静评分(OAA/S 4~1)时,老年组BIS值明显高于年轻组(Plt;0.01),而血药浓度低于年轻组(Pgt;0.05)。结论:BIS在监测异丙酚镇静水平及预测意识消失方面有重要价值,在同一镇静评分时,老年人BIS值高于年轻人。
目的:讨论胃镜检查中更加舒适的一种镇静镇痛方法。方法:芬太尼-异丙酚为Ⅰ组,咪唑安定-异丙酚组为Ⅱ组。观察记录各组术中的反应、胃镜操作时间、麻醉药物起效时间、苏醒时间和清醒时间,检查前中后BP、HR和SpO2的变化,及术后问卷调查。结果:Ⅰ组药物的起效快,受检者苏醒及清醒时间短,术中不适反应少,与Ⅱ组比较有统计学意义(Plt;0.01)。结论:镇静无痛苦胃镜检查中芬太尼-异丙酚联合用药更舒适。
目的 探究静脉利多卡因联合异丙酚在无痛胃镜麻醉应用中的可行性、安全性和有效性。 方法 纳入2012年4月－5月行无痛胃镜检查的患者102例，随机分为两组：利多卡因组（L组）和生理盐水组（S组）。L组于麻醉诱导前缓慢静注2%利多卡因2 mg/kg，S组给予相同容量的生理盐水。比较两组间的异丙酚诱导剂量、追加剂量和总量，以及检查中呛咳反应、体动的发生率，麻醉时间，不良事件和不良反应发生率，麻醉医生和患者满意度是否有差异。 结果 L组较S组异丙酚诱导剂量减少约0.17 mg/kg，差异有统计学意义（P=0.03）；余指标差异均无统计学意义。 结论 将静脉利多卡因用于无痛胃镜麻醉，虽能减少异丙酚诱导剂量，但减少程度并不明显；不能改善诱导前后血流动力学的剧烈波动，也未能缩短总的麻醉时间；在抑制术中呛咳反应、体动方面也未见明显优势。无论是从安全性还是经济学方面考虑，我们都不推荐将静脉利多卡因联合异丙酚麻醉的方案用于无痛胃镜检查。
目的:观察舒芬太尼复合异丙酚自控镇静镇痛在结肠镜检查中的效果及不良反应,从而探讨该方法的安全性和有效性。方法:行无痛纤维结肠镜检查的患者60例,随机分为两组:自控镇痛/镇静组和静脉复合全麻醉组,每组30例。自控镇痛/镇静组首先缓慢静脉注射舒芬太尼0.12 μg/kg,随之接电子自控镇痛泵,负荷量设定为0.5 mg/kg,以4 mg/kg·h的速度持续泵入异丙酚(10 mg/mL),术中按压1次自控手柄可快速推注异丙酚1 mL。静脉复合全麻醉组首先静脉缓慢推注芬太尼1 μg/kg,咪唑安定0.02 mg/kg, 2 min后缓慢推注异丙酚0.8～1 mg/kg。术中间断给予异丙酚以维持听觉诱发电位指数(AAI)于30～40之间。结果:静脉复合全麻醉组的MAP较检查前明显下降且较自控镇痛/镇静组下降更为明显且具有统计学意义(Plt;0.05)。自控镇痛/镇静组的呼吸频率较静脉复合全麻醉组下降明显且在T3时间点具有统计学意义(Plt;0.05)。自控镇痛/镇静组患者OAA/S评分达5分和Aldrete评分达9分的时间均较静脉复合全麻醉组明显缩短(1.4±1.3 VS 3.9±1.7和 2.9±1.7 VS 5.7±1.7)(Plt;0.05)。两组的内镜医师和患者满意度评分无统计学差异(P＞0.05)。结论:自控镇静镇痛能够比传统的静脉全身麻醉提供更良好的循环系统稳定性,更迅速的麻醉后恢复,是结肠镜检查镇静镇痛的理想和安全方法。
目的 明确异丙酚对于高血压脑出血患者血清炎性细胞因子的影响。 方法 将2008年3月-2009年3月收治的高血压脑出血患者47例分为两组，异丙酚组采用异丙酚、芬太尼、维库溴铵以及异氟醚诱导和维持麻醉；对照组采用依托咪酯、芬太尼、维库溴铵以及异氟醚诱导和维持麻醉。比较两组患者手术中不同时段血清白细胞介素（IL-6）、肿瘤坏死因子（TNF）、血栓素、内皮素、前列腺素E和降钙素水平。 结果 患者麻醉过程中生命体征平稳，无麻醉相关死亡。术前异丙酚组患者血清IL-6、TNF、血栓素、内皮素、前列腺素E和降钙素水平与对照组比较均无差异(P＞0.05)，而麻醉诱导后差异有统计学意义(P＜0.05)，而且差异随时间延长增大。 结论 采用异丙酚麻醉能降低术中血清炎性细胞因子水平。
Objective To investigate the changes of interleukin-17 ( IL-17) and the effects of propofol in rats with acute lung injury ( ALI) . Methods ALI model was established by hydrochloric acid ( HCl) inhalation in a dose of 2 mL/kg. 35 adultmale SD rats were randomly divided into seven groups, ie.a control group, a HCl group, and five propofol groups ( T24b , T12b , T0 , T1a , T3a groups, respectively) . The T0 ,T24b and T12b groups were pretreated with intraperitoneal propofol injection 0, 24 and 12 hours respectively before HCl inhalation. The T1a and T3a groups were managed by intraperitoneal propofol injection 1 and 3 hours respectively after HCl inhalation. Immunohistochemistry was used to determine the expression of IL-17 in lung tissue. ELISA was adopted to detect the levels of IL-17 and IL-8 in lung tissue homogenate as well as in bronchoalveolar lavage fluid ( BALF) , meanwhile arterial partial pressure of oxygen ( PaO2 ) and myeloperoxidase ( MPO) were measured. Results Those rats in the HCl group appeared respiratory distress, cyanosis, pulmonary edema, and inflammatory cells infiltration in lung tissues after HCl inhalation.The IL-17 levels in lung tissue homogenate as well as in BALF were higher in the HCl group than those in the control group( all P lt; 0. 01) . IL-17 was mainly expressed in alveolar epithelial cells and mononuclear cells in the ALI rats and its expression level was higher than that in the control group. IL-17 concentration in lung tissue homogenate was both correlated with IL-8 concentration in lung tissue homogenate ( r=0. 98, P =0.003) and with the activity of MPO in lung tissue( r=0. 981, P =0. 003) in the HCl group. Mainwhile, a same significant correlation was found between IL-8 level in lung tissue homogenate and the MPO activity in the HCl group( r =0. 961, P =0. 009) . Propofol attenuated lung injury induced by HCl inhalation, especially in T24b group. The concentrations of IL-17 in lung tissue homogenate and in BALF were lower in T24b group when compared with the HCl group( P = 0. 011, P =0. 003, respectively) . Conclusions The expression of IL-17 increases in ALI rats. Pretreatment with propofol by 24 hours has obvious inhibiting effects on inflammatory reaction. Inhibiting IL-17 expression may be one of the mechanisms through which propofol inhibits the inflammatory reaction of ALI.