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两种伞形滤器临床应用的初步研究
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作者 顾祝新 赵苏鸣 +5 位作者 顾潍炜 杨晓虎 贾鹏飞 陈聪 石佳鹏 赵辉 《南通大学学报(医学版)》 2024年第5期492-495,共4页
目的:探讨Celect和Denali两种伞状滤器在下肢深静脉血栓(deep vein thrombosis,DVT)患者中的临床应用,分析两种滤器应用中的并发症及风险因素。方法:收集2015年1月─2022年1月南通大学附属医院收治的221例急性下肢DVT患者的资料,置入Cel... 目的:探讨Celect和Denali两种伞状滤器在下肢深静脉血栓(deep vein thrombosis,DVT)患者中的临床应用,分析两种滤器应用中的并发症及风险因素。方法:收集2015年1月─2022年1月南通大学附属医院收治的221例急性下肢DVT患者的资料,置入Celect滤器的123例为A组,置入Denali滤器的98例为B组,观察下腔静脉滤器有无倾斜、移位、断裂、有无新发肺动脉栓塞、下腔静脉栓塞及下腔静脉穿孔的发生率。结果:A组患者滤器倾斜角度>15°有29例(23.6%),B组4例(4.1%)。A组患者下腔静脉穿孔0级118例,Ⅰ级3例,Ⅱ级2例,未发生Ⅲ级、Ⅳ级穿孔;B组下腔静脉穿孔0级97例,Ⅰ级1例,未发生Ⅱ~Ⅳ级穿孔。所有患者进行了滤器取出操作,9例患者因滤器倾斜导致回收钩贴壁,回收钩包埋于下腔静脉内膜下,运用了附加取出技术,其中A组6例(4.89%),B组3例(3.06%);221例患者均无新发肺动脉栓塞、滤器断裂、滤器移位及下腔静脉栓塞。结论:Celect较Denali滤器钩端易包埋于腔静脉内膜下,易发生倾斜,增加回收难度,Celect及Denali两种下腔静脉滤器在肺动脉栓塞风险可控后应尽早将其取出。 展开更多
关键词 腔静脉滤器 深静脉血栓 滤器倾斜
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Design of non-polarizing thin film edge filters 被引量:6
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作者 GU Pei-fu ZHENG Zhen-rong 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2006年第6期1037-1040,共4页
The separation between s- and p-polarization components invariably affects thin film edge filters used for tilted incidence and is a difficult problem for many applications, especially for optical communication. This ... The separation between s- and p-polarization components invariably affects thin film edge filters used for tilted incidence and is a difficult problem for many applications, especially for optical communication. This paper presents a novel design method to obtain edge filters with non-polarization at incidence angle of 45°. The polarization separation at 50% trans-mittance for a long-wave-pass filter and a short-wave-pass filter is 0.3 nm and 0.1 nm respectively. The design method is based on a broadband Fabry-Perot thin-film interference filter in which the higher or lower interference band at both sides of the main transmittance peak can be used for initial design of long-wave-pass filter or short-wave-pass filter and then can be refined to reduce the transmittance ripples. The spacer 2H2L2H or 2L2H2L of the filter is usually taken. Moreover, the method for expanding the bandwidth of rejection and transmission is explained. The bandwidth of 200 nm for both rejection region and transmission band is obtained at wavelength 1550 nm. In this way, the long-wave-pass and short-wave-pass edge filters with zero separation between two polarization components can easily be fabricated. 展开更多
关键词 Thin film optics Interference edge filters Non-polarization design
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