Connell R S, Webb M C
Ann Surg. 1975 Mar;181(3):273-8. doi: 10.1097/00000658-197503000-00005.
Three types of microemboli filters were examined with the scanning electron microscope. The single layer 40 mu pore filter traps aggregates in the pores. The aggregates are extruded and pass on with the blood and can be demonstrated in a Dacron wool filter downstream. The polyurethane foam filter is an in depth multiple pore filter of variable pore size. This filter allows many aggregates to escape through the pores in the beginning of a transfusion and these aggregates were seen in a Dacron wool filter downstream. As aggregates become trapped, the pore sizes decrease, filtration improves, and flow through the filter becomes reduced. The Dacron wool filter absorbs the particulate material to the fibers of wool. This filter has a large capacity and was not observed to leak aggregates even when subjected to high filtration pressures.
用扫描电子显微镜检查了三种类型的微栓子过滤器。单层40微米孔径的过滤器会将聚集体截留在孔隙中。这些聚集体被挤出并随血液继续流动，可在下游的涤纶羊毛过滤器中显示出来。聚氨酯泡沫过滤器是一种具有可变孔径的深层多孔过滤器。在输血开始时，这种过滤器会让许多聚集体通过孔隙逸出，这些聚集体会在下游的涤纶羊毛过滤器中被看到。随着聚集体被截留，孔径减小，过滤效果改善，通过过滤器的流量也会减少。涤纶羊毛过滤器会将颗粒物质吸附到羊毛纤维上。这种过滤器容量大，即使在承受高过滤压力时也未观察到聚集体泄漏。
