CPC A61M 60/135 (2021.01) [A61M 60/216 (2021.01); A61M 60/888 (2021.01); A61M 2205/04 (2013.01); A61M 2205/7563 (2013.01); A61M 2207/00 (2013.01)] | 14 Claims |
1. An apparatus, comprising:
a left-ventricular assist device comprising an impeller configured to be placed inside a left ventricle of a subject and to pump blood from the left ventricle to an aorta of the subject, by rotating;
a frame disposed around the impeller; and
a pump-outlet tube configured to traverse an aortic valve of the subject, such that a proximal portion of the tube is disposed within the subject's aorta and a distal portion of the pump-outlet tube is disposed within the subject's left ventricle, the distal portion of the pump-outlet tube extending to a distal end of the frame and defining a plurality of blood-inlet openings that are sized such as (a) to allow blood to flow from the subject's left ventricle into the tube and (b) to block structures from the subject's left ventricle from entering into the frame, wherein a porosity of the distal portion of the pump-outlet tube, which defines the blood-inlet openings, is lower within a proximal region of the distal portion of the pump-outlet tube than within a distal region of the distal portion of the pump-outlet tube that is distal to the proximal region.
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