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US 12,714,845 B2Granted
Catheter blood pump distal bearing assemblies
AssigneeSupira Medical, Inc.
InventorsAri Ryan, Shayan Assani, Daniel Varghai, Crissly Crisostomo
Life of this patent
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Abstract
Catheter blood pumps that include an expandable pump portion. The pump portions include a collapsible blood conduit that defines a blood lumen. The collapsible blood conduits include a collapsible scaffold adapted to provide radial support to the blood conduit. The pump portion also includes one or more impellers.
Claims19
A catheter blood pump, comprising:
- a collapsible and expandable blood conduit having an inflow portion;
- proximal and distal impellers at least partially disposed in the blood conduit;
- a distal bearing assembly that is proximate the inflow portion;
- a rotatable drive assembly coupled to and extending through the proximal impeller, through the distal impeller, through the distal bearing assembly and extending distally beyond the distal bearing assembly;
- a plurality of distal struts coupled to the blood conduit and extending distally from the blood conduit at the inflow portion, the plurality of distal struts coupled to the distal bearing assembly;
- and
- a force applier secured to the distal bearing assembly and to a distal end of the rotatable drive assembly, and extending therebetween,
- wherein distal ends of the plurality of distal struts, the distal bearing assembly, and a proximal end of the force applier are axially movable relative to the rotatable drive assembly to facilitate collapse and expansion of the blood conduit.
5 more elements
A catheter blood pump, comprising:
- a collapsible and expandable blood conduit;
- proximal and distal impellers at least partially disposed in the blood conduit;
- a distal bearing assembly that is proximate the inflow portion;
- a rotatable drive assembly coupled to and extending through the proximal impeller, through the distal impeller, through the distal bearing assembly and extending distally beyond the distal bearing assembly;
- a plurality of distal struts coupled to the blood conduit and extending distally from the blood conduit at the pump inflow, the plurality of distal struts coupled to the distal bearing assembly;
- and
- a sleeve coupled to the distal bearing assembly and extending about the rotatable drive assembly and distally thereof, the sleeve having a variable flexibility along its length with greater flexibility in a distal region than in a proximal region where it is coupled to the distal bearing assembly,
- wherein the variable flexibility is such that the sleeve at the distal region can bend but is prevented from contacting the rotatable drive assembly therein.
5 more elements
A catheter blood pump, comprising:
- a collapsible and expandable blood conduit;
- proximal and distal impellers at least partially disposed in the blood conduit;
- a distal bearing assembly that is proximate the inflow portion;
- a rotatable drive assembly coupled to and extending through the proximal impeller, through the distal impeller, through the distal bearing assembly and extending distally beyond the distal bearing assembly;
- a plurality of distal struts coupled to the blood conduit and extending distally from the blood conduit at the pump inflow, the plurality of distal struts coupled to the distal bearing assembly;
- a force applier secured to the distal bearing assembly and to a distal end of the rotatable drive assembly, and extending therebetween;
- and
- wherein distal ends of the plurality of distal struts, the distal bearing assembly, and a proximal end of the force applier are axially movable relative to the rotatable drive assembly to facilitate collapse and expansion of the blood conduit, and
- wherein when the blood conduit is in an expanded configuration, a proximally directed force is being applied to a distal end of the distal bearing assembly.
6 more elements
Dependencies are inferred from the claim text.