目的探索模拟高原环境中大鼠芬太尼单次给药后药代动力学变化及其可能的影响因素。方法使用随机数字表法将36只体质量为(250±20)g的健康雌性SD大鼠(6~8周龄)分为模拟高原环境急性暴露组(A组)、慢性暴露组(S组)和对照组(C组),每组1...目的探索模拟高原环境中大鼠芬太尼单次给药后药代动力学变化及其可能的影响因素。方法使用随机数字表法将36只体质量为(250±20)g的健康雌性SD大鼠(6~8周龄)分为模拟高原环境急性暴露组(A组)、慢性暴露组(S组)和对照组(C组),每组12只。急性暴露组和慢性暴露组在低压舱中模拟5000 m海拔高度分别饲养3 d和30 d,对照组在舱外(海拔300 m)饲养。每组随机选取6只大鼠,通过股静脉单次给予芬太尼,在给药前及给药后1、2、4、8、15、30、60、120、180 min经股动脉采集血液,采用液相色谱串联质谱法(liquid chromatography tandem mass spectrometry,LC-MS/MS)检测芬太尼血药浓度,使用WinNonlin 8.2软件计算药代动力学特征参数;剩余6只大鼠通过超声检测门静脉的内径、峰值流速及血流量,并取肝组织进行CYP3A1蛋白含量检测。结果急性暴露组和慢性暴露组大鼠在60、120、180 min 3个时间点的血药浓度显著低于对照组(P=0.002,P<0.001,P=0.001)。与对照组比较,急性暴露组清除率(clearance rate,CL)增加54.06%(P=0.021),平均驻留时间(MRT_(last))缩短24.21%(P=0.033);慢性暴露组CL增加50.10%(P=0.041),血药浓度-时间曲线下面积(AUC_(0-t)、AUC_(0-∞))、MRT_(last)分别降低18.92%(P=0.039)、27.54%(P=0.018)、33.61%(P=0.004)。慢性暴露组门静脉内径和血流量较对照组分别增加10.87%(P=0.006)、42.50%(P=0.006)。急性暴露组CYP3A1蛋白含量较对照组升高28.74%(P=0.048)。结论模拟高原环境中大鼠芬太尼单次给药后清除速率较平原环境显著加快,该现象可能与模拟高原环境中大鼠肝脏血流量增加以及肝脏CYP3A1蛋白表达增加有关。展开更多
目的探讨术中血压管理对心血管高风险患者行腹腔镜胃肠肿瘤手术苏醒后拔管时间的影响。方法从我院病历系统中收集2020年7月至2021年11月进行腹腔镜胃肠肿瘤手术且符合入选标准的病例共计198例,根据术中血压管理情况,分为常规血压组(术...目的探讨术中血压管理对心血管高风险患者行腹腔镜胃肠肿瘤手术苏醒后拔管时间的影响。方法从我院病历系统中收集2020年7月至2021年11月进行腹腔镜胃肠肿瘤手术且符合入选标准的病例共计198例,根据术中血压管理情况,分为常规血压组(术中平均动脉压≥65 mmHg)和强化血压组(术中平均动脉压≥80 mmHg),记录2组病例术后拔管时间、Steward苏醒评分、睡眠、恶心呕吐、声嘶、疼痛等情况。作为敏感性分析,分别使用多元线性回归、逆概率处理加权(inverse probability of treatment weighting,IPTW)和重叠加权法(overlap weighting)平衡混杂因素影响后,分析不同血压水平的主要观察指标的差异,将标准均数差(standard Mean difference,SMD)作为组间均衡性的评价指标,倾向性匹配后做线性回归,判断术中血压管理与术后拔管时间的关系。结果强化血压组术后拔管时间显著短于常规血压组[(42.56±25.88)vs(79.15±39.45)min,P<0.001]。结论术中强化血压管理策略能缩短心血管高风险患者行腹腔镜胃肠肿瘤手术苏醒后拔管时间。展开更多
To explore the application of the characteristics of metallic microparticles, alternating current electric trapping of the SU-8 microrods coated with a thin gold layer by the chemical approach is investigated. Positiv...To explore the application of the characteristics of metallic microparticles, alternating current electric trapping of the SU-8 microrods coated with a thin gold layer by the chemical approach is investigated. Positive dielectrophoresis is used to absorb the gold-coated SU-8 microrods at the edge of the parallel electrodes, thereby forming chains to connect the electrodes. This is a fast automatic microcircuit formation process. Moreover, a non-charged molecule is modified on the surface of the gold-coated SU-8 microrod, and the modified microrods are controlled by the alternating electric field to form a number of chains. The different chains between the parallel electrodes consist of various parallel circuits. In order to compare these chains with different electric surfaces, the impedances of the metallic and modified microrods are measured and compared, and the results show that the gold-coated microrods act as pure resistors, while the microrods functionalized by a non-charged molecule behave as good capacitors.展开更多
The control and handling of fluids is central to many applications of the lab-on-chip. This paper analyzes the basic theory of manipulating different electrolytes and finds the two-dimensional model. Coulomb force and...The control and handling of fluids is central to many applications of the lab-on-chip. This paper analyzes the basic theory of manipulating different electrolytes and finds the two-dimensional model. Coulomb force and dielectric force belonging to the body force of different electrolytes in the microchannel were analyzed. The force criterion at the interface was concluded, and testified by the specific example. Three basic equations were analyzed and applied to simulate the phenomenon. The force criterion was proved to be correct based on the simulation results.展开更多
文摘目的探索模拟高原环境中大鼠芬太尼单次给药后药代动力学变化及其可能的影响因素。方法使用随机数字表法将36只体质量为(250±20)g的健康雌性SD大鼠(6~8周龄)分为模拟高原环境急性暴露组(A组)、慢性暴露组(S组)和对照组(C组),每组12只。急性暴露组和慢性暴露组在低压舱中模拟5000 m海拔高度分别饲养3 d和30 d,对照组在舱外(海拔300 m)饲养。每组随机选取6只大鼠,通过股静脉单次给予芬太尼,在给药前及给药后1、2、4、8、15、30、60、120、180 min经股动脉采集血液,采用液相色谱串联质谱法(liquid chromatography tandem mass spectrometry,LC-MS/MS)检测芬太尼血药浓度,使用WinNonlin 8.2软件计算药代动力学特征参数;剩余6只大鼠通过超声检测门静脉的内径、峰值流速及血流量,并取肝组织进行CYP3A1蛋白含量检测。结果急性暴露组和慢性暴露组大鼠在60、120、180 min 3个时间点的血药浓度显著低于对照组(P=0.002,P<0.001,P=0.001)。与对照组比较,急性暴露组清除率(clearance rate,CL)增加54.06%(P=0.021),平均驻留时间(MRT_(last))缩短24.21%(P=0.033);慢性暴露组CL增加50.10%(P=0.041),血药浓度-时间曲线下面积(AUC_(0-t)、AUC_(0-∞))、MRT_(last)分别降低18.92%(P=0.039)、27.54%(P=0.018)、33.61%(P=0.004)。慢性暴露组门静脉内径和血流量较对照组分别增加10.87%(P=0.006)、42.50%(P=0.006)。急性暴露组CYP3A1蛋白含量较对照组升高28.74%(P=0.048)。结论模拟高原环境中大鼠芬太尼单次给药后清除速率较平原环境显著加快,该现象可能与模拟高原环境中大鼠肝脏血流量增加以及肝脏CYP3A1蛋白表达增加有关。
文摘目的探讨术中血压管理对心血管高风险患者行腹腔镜胃肠肿瘤手术苏醒后拔管时间的影响。方法从我院病历系统中收集2020年7月至2021年11月进行腹腔镜胃肠肿瘤手术且符合入选标准的病例共计198例,根据术中血压管理情况,分为常规血压组(术中平均动脉压≥65 mmHg)和强化血压组(术中平均动脉压≥80 mmHg),记录2组病例术后拔管时间、Steward苏醒评分、睡眠、恶心呕吐、声嘶、疼痛等情况。作为敏感性分析,分别使用多元线性回归、逆概率处理加权(inverse probability of treatment weighting,IPTW)和重叠加权法(overlap weighting)平衡混杂因素影响后,分析不同血压水平的主要观察指标的差异,将标准均数差(standard Mean difference,SMD)作为组间均衡性的评价指标,倾向性匹配后做线性回归,判断术中血压管理与术后拔管时间的关系。结果强化血压组术后拔管时间显著短于常规血压组[(42.56±25.88)vs(79.15±39.45)min,P<0.001]。结论术中强化血压管理策略能缩短心血管高风险患者行腹腔镜胃肠肿瘤手术苏醒后拔管时间。
基金supported by the National Natural Science Foundation of China(Grant No.51075087)the Funds from the State Key Laboratory of Fluid Power Transmission and Control,Zhejiang University,China(Grant Nos.GZKF-201107 and GZKF-201004)the Foundation from the China Scholarship Council(Grant No.2009612129)
文摘To explore the application of the characteristics of metallic microparticles, alternating current electric trapping of the SU-8 microrods coated with a thin gold layer by the chemical approach is investigated. Positive dielectrophoresis is used to absorb the gold-coated SU-8 microrods at the edge of the parallel electrodes, thereby forming chains to connect the electrodes. This is a fast automatic microcircuit formation process. Moreover, a non-charged molecule is modified on the surface of the gold-coated SU-8 microrod, and the modified microrods are controlled by the alternating electric field to form a number of chains. The different chains between the parallel electrodes consist of various parallel circuits. In order to compare these chains with different electric surfaces, the impedances of the metallic and modified microrods are measured and compared, and the results show that the gold-coated microrods act as pure resistors, while the microrods functionalized by a non-charged molecule behave as good capacitors.
基金Project supported by the 111 Project (Grant No B07018)
文摘The control and handling of fluids is central to many applications of the lab-on-chip. This paper analyzes the basic theory of manipulating different electrolytes and finds the two-dimensional model. Coulomb force and dielectric force belonging to the body force of different electrolytes in the microchannel were analyzed. The force criterion at the interface was concluded, and testified by the specific example. Three basic equations were analyzed and applied to simulate the phenomenon. The force criterion was proved to be correct based on the simulation results.
