Kinney T B, Rose S C, Weingarten K E, Valji K, Oglevie S B, Roberts A C
UCSD Medical Center, Department of Radiology, San Diego, CA 92103-8756, USA.
J Vasc Interv Radiol. 1997 Nov-Dec;8(6):1029-37. doi: 10.1016/s1051-0443(97)70706-1.
A comparison of tilting, caval coverage, asymmetry, and insertion problems with the over-the-wire stainless-steel and titanium versions of the Greenfield filter.
The study compared 104 stainless-steel and 141 titanium Greenfield inferior vena cava (IVC) filter insertions. The angle the sheath and deployed filter made relative to the cava, as well as filter strut distribution, were determined from spot films. The proportionate caval coverage was computed from the cavogram (anteroposterior projection). Mean filter tilts, subgrouped by insertion site, and caval coverage were compared with the Student t test, whereas strut patterns were analyzed with a contingency table.
The filter caval and sheath caval angles correlated. The filter caval angles varied with insertion site, but were lowest with a right jugular approach. Caval coverage was identical with both designs. The stainless-steel version resulted in a more uniform distribution of struts in comparison with the titanium version. The incidence of insertion problems was not significantly different between the filter types.
While IVC filter tilting was not improved with the newer design, the pattern of struts was more uniformly symmetric with the stainless-steel device. The right jugular insertion site was associated with the lowest filter caval angles and the most symmetric pattern of struts.
比较丝外不锈钢材质和钛材质的格林菲尔德滤器在倾斜度、腔静脉覆盖情况、不对称性及置入问题方面的差异。
本研究对比了104例不锈钢材质和141例钛材质格林菲尔德下腔静脉（IVC）滤器的置入情况。根据点片确定鞘管与已展开滤器相对于腔静脉的角度以及滤器支杆分布。通过腔静脉造影（前后位投影）计算腔静脉的比例覆盖情况。按置入部位分组，比较平均滤器倾斜度及腔静脉覆盖情况，采用Student t检验，而支杆模式则通过列联表进行分析。
滤器与腔静脉的角度和鞘管与腔静脉的角度相关。滤器与腔静脉的角度随置入部位而异，但经右颈静脉途径置入时角度最小。两种设计的腔静脉覆盖情况相同。与钛材质滤器相比，不锈钢材质滤器的支杆分布更均匀。两种滤器类型在置入问题的发生率上无显著差异。
虽然新设计并未改善下腔静脉滤器的倾斜度，但不锈钢装置的支杆模式更均匀对称。右颈静脉置入部位与最低的滤器与腔静脉角度及最对称的支杆模式相关。
