US 12,465,748 B2
Catheter blood pumps and collapsible pump housings
Michael Calomeni, San Jose, CA (US); Brian D. Brandt, Morgan Hill, CA (US); Daniel Hildebrand, Santa Cruz, CA (US); and Gregory Michael Hamel, Redwood City, CA (US)
Assigned to Supira Medical, Inc., Los Gatos, CA (US)
Filed by Shifamed Holdings, LLC, Campbell, CA (US)
Filed on Aug. 7, 2020, as Appl. No. 16/988,221.
Claims priority of provisional application 62/884,089, filed on Aug. 7, 2019.
Prior Publication US 2021/0038786 A1, Feb. 11, 2021
Int. Cl. A61M 60/808 (2021.01); A61M 60/13 (2021.01); A61M 60/135 (2021.01)
CPC A61M 60/808 (2021.01) [A61M 60/13 (2021.01); A61M 60/135 (2021.01)] 21 Claims
OG exemplary drawing
 
1. A catheter blood pump (“blood pump”), comprising:
an expandable pump portion extending distally relative to a catheter, the pump portion including
an impeller housing that includes an expandable blood conduit defining a blood lumen, the expandable blood conduit comprising:
a plurality of struts extending distally from the catheter, a proximal impeller scaffold portion extending distally from the plurality of struts, a distal impeller scaffold portion, and a central scaffold portion disposed between the proximal impeller scaffold portion and the distal impeller scaffold portion, the proximal impeller scaffold portion and the distal impeller scaffold portion having a plurality of linear axial elements and a plurality of circumferentially adjacent circumferential connectors, the central scaffold portion having a different configuration than the proximal impeller scaffold portion and the distal impeller scaffold portion and including a plurality of helical elements having a helical configuration between the proximal impeller scaffold portion and the distal impeller scaffold portion, wherein each of the helical elements is an extension of a linear element in at least one of the proximal impeller scaffold portion or the distal impeller scaffold portion, wherein the proximal impeller scaffold portion and the distal impeller scaffold portion do not include helical elements, the central scaffold portion being less stiff in response to a radially inward force than the proximal and distal impeller scaffold portions, and
a membrane coupled to the proximal impeller scaffold portion, the central scaffold portion, and the distal impeller scaffold portion, the membrane at least partially defining the blood lumen, and
at least one impeller disposed at least partially within at least one of the proximal impeller scaffold portion and the distal impeller scaffold portion.