INTRAVASCULAR BLOOD PUMP OUTFLOW FLOW DISRUPTOR
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. The pump portion may also include a blood mover that is adapted to move blood to reduce stagnation, and is separate from the impeller.
1 . A intravascular blood pump, comprising:
a collapsible pump portion;
an impeller disposed within the collapsible pump portion near a pump outflow; and
a rotatable blood mover axially spaced from the impeller and being disposed at least partially within the pump outflow.
2 . The blood pump of claim 1 , wherein the rotatable blood mover is rotationally coupled to the impeller.
3 . The blood pump of claim 1 , wherein the rotatable blood mover is adapted to be collapsible and expandable.
4 . The blood pump of claim 1 , wherein the rotatable blood mover is not adapted to be collapsible and expandable.
5 . The blood pump of claim 1 , wherein the rotatable blood mover is more rigid than the impeller.
6 . The pump portion of any of claim 1 , wherein the rotatable blood mover comprises a plurality of radially extending fins, and optionally includes a conical surface from which the plurality of fins extend.
7 . The pump portion of claim 1 , wherein the rotatable blood mover has a radially outermost dimension less than a radially outermost dimension of the impeller when expanded, both relative to a long axis of a drive cable, optionally wherein the radially outermost dimension of the blood mover is less than half of the radially outermost dimension of the impeller when expanded.
8 . The blood pump of claim 1 , wherein the rotatable blood mover is adapted to reduce at least one of blood recirculation or stagnation in the vicinity of the blood mover or the pump outflow.
9 . The blood pump of claim 1 , wherein the impeller is fully disposed in the pump outflow.
10 . The blood pump of any of claim 1 , wherein the pump outflow includes a radial flow component.
11 . The blood pump of claim 1 , wherein the blood mover is not in contact with the impeller.
12 . The blood pump of claim 2 , wherein the rotatable blood mover is rotationally coupled to the impeller with a drive shaft.
13 . The blood pump of claim 12 , wherein the rotatable blood mover is part of a bearing housing that rotates when the drive shaft rotates.
14 . A intravascular blood pump, comprising:
a collapsible pump portion;
an impeller disposed within the collapsible pump portion near a pump inflow; and
a rotatable blood mover axially spaced from the impeller and being disposed at least partially within the pump inflow.
15 . The blood pump of claim 14 , wherein the rotatable blood mover is rotationally coupled to the impeller.
16 . The blood pump of claim 14 , wherein the rotatable blood mover is adapted to be collapsible and expandable
17 . The blood pump of claim 14 , wherein the rotatable blood mover is not adapted to be collapsible and expandable.
18 . The blood pump of claim 14 , wherein the rotatable blood mover is more rigid than the impeller.
19 . The blood pump of any of claim 14 , wherein the rotatable blood mover comprises a plurality of radially extending fins, and optionally includes a conical surface from which the plurality of fins extend.
20 . The blood pump of claim 14 , wherein the rotatable blood mover has a radially outermost dimension less than a radially outermost dimension of the impeller when expanded, both relative to a long axis of a drive cable, optionally wherein the radially outermost dimension of the blood mover is less than half of the radially outermost dimension of the impeller when expanded.
21 - 39 . (canceled)