Intravascular blood pump with access filter

An intravascular blood pump has an access filter that reduces the risk of heart tissue being drawn into an access port of the pump. The filter defines a plurality of apertures through which blood flows through the filter. The aperture is sized to prevent inhalation of the cardiac tissue into the input port. The filter includes a plurality of generally helical first struts and a plurality of second struts wound about a longitudinal axis of the filter. The first strut and the second strut collectively define the plurality of apertures therebetween. The struts may be woven filaments, or the apertures may be defined in a film (foil) tube, with the remaining material between the apertures forming the struts. 一种血管内血泵具有进入过滤器，所述进入过滤器降低心脏组织被吸入泵的进入端口中的风险。所述过滤器限定多个孔口，血液通过所述多个孔口流过过滤器。所述孔口被定尺寸为防止所述心脏组织被吸入所述输入端口。所述过滤器包括围绕过滤器的纵向轴线缠绕的多个大致螺旋形的第一支柱和多个第二支柱。所述第一支柱和所述第二支柱在其之间共同限定所述多个孔口。所述支柱可以是编织细丝，或所述孔口可以限定在薄膜(箔)管中，其中所述孔口之间的剩余材料形成所述支柱。