INTRAVASCULAR BLOOD PUMPS AND METHODS OF USE

1 . An intravascular blood pump, comprising:

an expandable blood conduit having an unexpanded delivery diameter and an expanded deployed diameter;

one or more expandable impellers disposed at least partially in the blood conduit; and

an inflatable member disposed distal to the blood conduit, the inflatable member having an uninflated delivery configuration and an inflated configuration, the inflatable member having a diameter in the inflated configuration that is greater than the expanded deployed diameter of the blood conduit.

2 . The intravascular blood pump of claim 1 , wherein the one or more impellers comprises an impeller disposed at a distal end of the blood conduit.

3 . The intravascular blood pump of claim 1 , further comprising a guidewire lumen extending through the inflatable member.

4 . The intravascular blood pump of claim 3 , further comprising an elongate member extending distally from a hub at a distal end of the blood conduit, the guidewire lumen extending through the hub and the elongate member.

5 . The intravascular blood pump of claim 4 , wherein the elongate member is more flexible than the hub.

6 . The intravascular blood pump of claim 1 , wherein the inflatable member comprises an inelastic material.

7 . The intravascular blood pump of claim 1 , wherein the inflatable member has a preformed shape.

8 . The intravascular blood pump of claim 7 , wherein the preformed shape is spherical.

9 . The intravascular blood pump of claim 7 , wherein the preformed shape is ovoid.

10 . The intravascular blood pump of claim 7 , wherein the preformed shape is toroidal.

11 . The intravascular blood pump of claim 1 , wherein the inflatable member is adapted and configured to be partially inflated during intravascular delivery to seal a distal end of a delivery sheath.