Blood pump housing component

Abstract

Blood pump assemblies and methods of manufacturing and operating blood pump assemblies are provided. The blood pump assembly includes a pump and an impeller blade rotatably coupled to the pump. The blood pump assembly also includes a pump housing component sized for passage through a body lumen and coupled to the pump. The pump housing component includes a peripheral wall extending about a rotation axis of the impeller blade. The peripheral wall includes an inner peripheral wall surface and an outer peripheral wall surface. The peripheral wall also includes one or more blood exhaust apertures. Each blood exhaust aperture in the one or more blood exhaust apertures is defined by an inner aperture edge and an outer aperture edge. Each inner aperture edge is chamfered between the inner peripheral wall surface and the outer peripheral wall surface.

1 - 33 . (canceled) 
     
     
         34 . A blood pump assembly comprising:
 a pump;   an impeller blade rotatably coupled to the pump; and   a pump housing component sized for passage through a body lumen and coupled to the pump, the pump housing component including a peripheral wall extending about a rotation axis of the impeller blade, the peripheral wall having:   an inner surface,   an outer surface, and   a plurality of blood exhaust apertures, each blood exhaust aperture being defined by an inner edge and an outer edge; and   wherein each blood exhaust aperture is blunted between the inner surface and the outer surface.   
     
     
         35 . The blood pump assembly of  claim 34 , wherein the one or more blood exhaust apertures are circular-shaped. 
     
     
         36 . The blood pump assembly of  claim 34 , wherein the outer edges of the plurality of blood exhaust apertures are rounded. 
     
     
         37 . The housing of  claim 34 , wherein each rounded outer edge has a radius of about 40 microns or greater. 
     
     
         38 . The housing of  claim 36 , wherein each rounded outer edge has a radius of about 105 microns or greater. 
     
     
         39 . The housing of  claim 34 , wherein the entirety of each outer edge is rounded. 
     
     
         40 . The blood pump assembly of  claim 34 , wherein the plurality of blood exhaust apertures comprises at least six blood exhaust apertures. 
     
     
         41 . The blood pump assembly of  claim 34 , wherein the impeller blade is positioned at least in part in the pump housing component. 
     
     
         42 . The blood pump assembly of  claim 34 , wherein the pump housing component is coupled to the pump at a first end and the pump housing component is coupled to a cannula component at a second end opposite the first end. 
     
     
         43 . The blood pump assembly of  claim 42 , wherein the cannula component includes a blood inlet manifold. 
     
     
         44 . The blood pump assembly of  claim 43 , further comprising a pigtail extension coupled to the blood inlet manifold. 
     
     
         45 . The blood pump assembly of  claim 34 , wherein the housing component is composed of a metal. 
     
     
         46 . The blood pump assembly of  claim 34 , wherein the pump housing component is electropolished.