Korbin C D, Van Allan R J, Andrews R T, Katz M D, Teitelbaum G P
Department of Radiology, Harbor-UCLA Medical Center, Torrance 90509-2910.
Cardiovasc Intervent Radiol. 1994 Jul-Aug;17(4):204-6. doi: 10.1007/BF00571535.
To determine the influence of filter leg-interlocking on filtering efficiency of titanium Greenfield inferior vena cava filters in an in vitro model.
Titanium Greenfield filters (TGF) were placed in an inferior vena cava (IVC) flow phantom with no interlocking legs, or with one or two pairs of legs interlocked. Clot emboli of varying sizes were introduced into the stream of flow, and the frequency of successful captures by the deformed filters was recorded.
Interlocking filter legs diminished the filtering efficiency of the TGF by up to 80% with the flow phantom in a horizontal position; no such compromise existed when the phantom was in a vertical position.
When leg interlocking is verified radiographically, the filtering efficiency of the TGF is reduced, and placement of a second IVC filter may be indicated.
在体外模型中确定滤器腿互锁对钛制格林菲尔德下腔静脉滤器过滤效率的影响。
将钛制格林菲尔德滤器（TGF）置于下腔静脉（IVC）血流模型中，滤器腿不互锁，或一对或两对滤器腿互锁。将不同大小的血凝块栓子引入血流中，并记录变形滤器成功捕获的频率。
当血流模型处于水平位置时，滤器腿互锁使TGF的过滤效率降低多达80%；当模型处于垂直位置时，则不存在这种影响。
当通过影像学检查证实滤器腿互锁时，TGF的过滤效率会降低，可能需要放置第二个IVC滤器。
