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下颈椎两种徒手椎弓根置钉方法的比较
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作者 储朝明 陈鸣 +2 位作者 秦入结 刘艺 吕游 《颈腰痛杂志》 2020年第1期14-17,共4页
目的回顾性比较下颈椎磨钻/刮匙辅助下徒手椎弓根置钉技术和手锥徒手椎弓根置钉技术的安全性和准确性。方法自2013年8月-2016年6月,对13例患者78个颈椎椎弓根应用磨钻、刮匙辅助下徒手下颈椎椎弓根置钉技术行后路椎弓根置钉(A组);11例患... 目的回顾性比较下颈椎磨钻/刮匙辅助下徒手椎弓根置钉技术和手锥徒手椎弓根置钉技术的安全性和准确性。方法自2013年8月-2016年6月,对13例患者78个颈椎椎弓根应用磨钻、刮匙辅助下徒手下颈椎椎弓根置钉技术行后路椎弓根置钉(A组);11例患者47个颈椎椎弓根应用手锥徒手下颈椎椎弓根置钉技术(B组)置钉。记录并比较两组患者的置钉时间、透视次数、置钉失败次数,术后行颈椎正侧位X线片、CT扫描,评估螺钉位置及穿透比例。观察两组患者的脑脊液漏以及神经血管损伤情况。结果A、B组间置钉时间、透视次数差异无统计学意义(P>0.05),但A组的置钉失败率显著低于B组、置钉优良率显著高于B组,组间差异均有统计学意义(P<0.05)。B组有3例脑脊液漏,1例神经损伤,A组无脑脊液漏、血管神经损伤情况发生。结论磨钻/刮匙辅助徒手下颈椎椎弓根置钉技术相比简单、安全、准确,值得推广,手锥徒手下颈椎椎弓根置钉技术应谨慎使用。 展开更多
关键词 下颈椎 椎弓根 徒手技术 螺钉
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Day-to-day traffic user equilibrium model considering influence of intelligent highways and advanced traveler information systems
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作者 SUN Chao chu zhao-ming +1 位作者 ZHANG Peng CHANG Yu-lin 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第4期1376-1388,共13页
To explore the influence of intelligent highways and advanced traveler information systems(ATIS)on path choice behavior,a day-to-day(DTD)traffic flow evolution model with information from intelligent highways and ATIS... To explore the influence of intelligent highways and advanced traveler information systems(ATIS)on path choice behavior,a day-to-day(DTD)traffic flow evolution model with information from intelligent highways and ATIS is proposed,whereby the network reliability and experiential learning theory are introduced into the decision process for the travelers’route choice.The intelligent highway serves all the travelers who drive on it,whereas ATIS serves vehicles equipped with information systems.Travelers who drive on intelligent highways or vehicles equipped with ATIS determine their trip routes based on real-time traffic information,whereas other travelers use both the road network conditions from the previous day and historical travel experience to choose a route.Both roadway capacity degradation and travel demand fluctuations are considered to demonstrate the uncertainties in the network.The theory of traffic network flow is developed to build a DTD model considering information from intelligent highway and ATIS.The fixed point theorem is adopted to investigate the equivalence,existence and stability of the proposed DTD model.Numerical examples illustrate that using a high confidence level and weight parameter for the traffic flow reduces the stability of the proposed model.The traffic flow reaches a steady state as travelers’routes shift with repetitive learning of road conditions.The proposed model can be used to formulate scientific traffic organization and diversion schemes during road expansion or reconstruction. 展开更多
关键词 day-to-day model intelligent highway advanced traveler information systems UNCERTAINTY
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