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3 () 0 () Recovery 8 () 0 () Conclusions: ?both PVCF and RVCF can be placed safely. ?Among both permanent and retrievable devices, however, opposed biconical designs seem to be associated with an increased risk for vena cava thrombosis.(在永久及可取出兩種濾器類型中,相對錐形的設(shè)計似乎與腔靜脈血栓風(fēng)險的增加相關(guān)) ?Although causative factors remain unclear, filter design and resultant flow dynamics may play an important role, because(雖然病因還不清楚,但濾器的設(shè)計及因而產(chǎn)生的血流動力學(xué)可能是一個重點(diǎn)的因素) ?all episodes of vena cava thrombosis occurred in patients with a singlefilter design. ( J Vasc Surg 2020。45:78994.)( 因為所有靜脈血栓的發(fā)生均在相同設(shè)計的濾器中。) Harlal A, et al. JVIR 18: 10315, ‘07 血栓阻塞 血流停滯 沒有血流停滯 : 11 永久性濾器在植入后某個時間不再需要濾過功能時,能被選擇性的取出 可取出濾器 ( Retrievable filter), 或能被選擇性的轉(zhuǎn)化其濾過結(jié)構(gòu) 可轉(zhuǎn)換濾器 (Convertible filter) 所有可選擇濾器同時也是永久性濾器。 結(jié)構(gòu)特點(diǎn): 目前可選擇濾器從設(shè)計上與永久性濾器相似,在永久性濾器設(shè)計的基礎(chǔ)上加了一個小鉤裝置以方便特殊的回收導(dǎo)管進(jìn)行回收。取出時需要抓捕器,使治療費(fèi)用增加。 ?Guidelines for the Use of