目的探讨超声引导下动态针尖定位法与传统触诊法桡动脉穿刺置管成功率比较.方法选择需要桡动脉穿刺置管的手术患者60例,随机分为对照组(传统触诊法)和观察组(超声引导动态针尖定位法)2组,每组30例.10名规范化培训的急诊科或ICU住院医师...目的探讨超声引导下动态针尖定位法与传统触诊法桡动脉穿刺置管成功率比较.方法选择需要桡动脉穿刺置管的手术患者60例,随机分为对照组(传统触诊法)和观察组(超声引导动态针尖定位法)2组,每组30例.10名规范化培训的急诊科或ICU住院医师行桡动脉穿刺置管.记录总穿刺次数、桡动脉穿刺第一次成功率和总穿刺成功率、穿刺时间、并发症包括血肿、血管痉挛等.结果两组间患者术前桡动脉直径和桡动脉横截面积的比较差异无统计学意义(P>0.05);两组间操作医师在性别、年龄、学历构成、培训前工作年限等方面的比较差异无统计学意义(P>0.05).与传统触诊法相比,超声引导动态针尖定位法桡动脉穿刺置管的总穿刺次数显著减少(2.3±0.8 VS. 1.8±0.9,P=0.018),穿刺第一次成功率(50.0% VS. 20.0%,P=0.029)和总穿刺成功率显著增高(76.7% VS. 40.0%,P=0.009),穿刺时间明显缩短(387.4±177.1 VS. 283.4±133.2,P=0.013).两组间桡动脉穿刺并发症差异无统计学意义.结论本研究建议急诊科或ICU住院医师行桡动脉穿刺置管时采用超声引导下的动态针尖定位法,相比传统触诊法,其可减少桡动脉穿刺次数,提高穿刺成功率和缩短穿刺时间.展开更多
In multi-agent systems(MAS),finding agents which are able to service properly in an open and dynamic environment are the key issue in problem solving.However,it is difficult to find agent resources quickly and positio...In multi-agent systems(MAS),finding agents which are able to service properly in an open and dynamic environment are the key issue in problem solving.However,it is difficult to find agent resources quickly and position agents accurately and complete the system integration by the keyword matching method,due to the lack of clear semantic information of the classical agent model.An semantic-based agent dynamic positioning mechanism was proposed to assist in the system dynamic integration.According to the semantic agent model and the description method,a two-stage process including the domain positioning stage and the service semantic matching positioning stage,was discussed.With this mechanism,proper agents that provide appropriate service to assign sub-tasks for task completion can be found quickly and accurately.Finally,the effectiveness of the positioning mechanism was validated through the in-depth performance analysis in the application of simulation experiments to the system dynamic integration.展开更多
文摘目的探讨超声引导下动态针尖定位法与传统触诊法桡动脉穿刺置管成功率比较.方法选择需要桡动脉穿刺置管的手术患者60例,随机分为对照组(传统触诊法)和观察组(超声引导动态针尖定位法)2组,每组30例.10名规范化培训的急诊科或ICU住院医师行桡动脉穿刺置管.记录总穿刺次数、桡动脉穿刺第一次成功率和总穿刺成功率、穿刺时间、并发症包括血肿、血管痉挛等.结果两组间患者术前桡动脉直径和桡动脉横截面积的比较差异无统计学意义(P>0.05);两组间操作医师在性别、年龄、学历构成、培训前工作年限等方面的比较差异无统计学意义(P>0.05).与传统触诊法相比,超声引导动态针尖定位法桡动脉穿刺置管的总穿刺次数显著减少(2.3±0.8 VS. 1.8±0.9,P=0.018),穿刺第一次成功率(50.0% VS. 20.0%,P=0.029)和总穿刺成功率显著增高(76.7% VS. 40.0%,P=0.009),穿刺时间明显缩短(387.4±177.1 VS. 283.4±133.2,P=0.013).两组间桡动脉穿刺并发症差异无统计学意义.结论本研究建议急诊科或ICU住院医师行桡动脉穿刺置管时采用超声引导下的动态针尖定位法,相比传统触诊法,其可减少桡动脉穿刺次数,提高穿刺成功率和缩短穿刺时间.
基金Projects(61173026,61373045,61202039)supported by the National Natural Science Foundation of ChinaProject(2012AA02A603)supported by the National High Technology Research and Development Program of China+1 种基金Projects(K5051223008,K5051223002)supported by the Fundamental Research Funds for the Central Universities of ChinaProject(513***103E)supported by the Pre-Research Project of the"Twelfth Five-Year-Plan"of China
文摘In multi-agent systems(MAS),finding agents which are able to service properly in an open and dynamic environment are the key issue in problem solving.However,it is difficult to find agent resources quickly and position agents accurately and complete the system integration by the keyword matching method,due to the lack of clear semantic information of the classical agent model.An semantic-based agent dynamic positioning mechanism was proposed to assist in the system dynamic integration.According to the semantic agent model and the description method,a two-stage process including the domain positioning stage and the service semantic matching positioning stage,was discussed.With this mechanism,proper agents that provide appropriate service to assign sub-tasks for task completion can be found quickly and accurately.Finally,the effectiveness of the positioning mechanism was validated through the in-depth performance analysis in the application of simulation experiments to the system dynamic integration.
