Catheter pump with cannula and selectively positionable impeller blade

Patent metadata

Field	Value
Publication number	US-12109367-B2
Application number	US-202218048087-A
Country	US
Kind code	B2
Filing date	Oct 20, 2022
Priority date	Apr 24, 2018
Publication date	Oct 8, 2024
Grant date	Oct 8, 2024

Abstract

A catheter pump includes a cannula having an inlet, an outlet, and a blood flow channel extending between the inlet and the outlet along a longitudinal axis. At least one impeller blade is operable to convey blood through the blood flow channel between the inlet to the outlet, wherein the at least one impeller blade is axially movable relative the cannula in a first direction toward the inlet and in a second direction away from the inlet.

First claim

What is claimed is:

1. A catheter pump comprising:
a cannula comprising an inlet, an outlet, and a blood flow channel extending between the inlet and the outlet along a longitudinal axis, wherein the blood flow channel has a constant diameter along the longitudinal axis and wherein at least the inlet has a variable diameter along the longitudinal axis; and
at least one impeller blade being operable to convey blood through the blood flow channel between the inlet and the outlet;
wherein the at least one impeller blade is axially movable relative to the cannula in a first direction toward the inlet and in a second direction away from the inlet.

2. The catheter pump of claim 1 , wherein the at least one impeller blade is selectively positionable relative to the inlet between a first predetermined position and a second predetermined position, and wherein the at least one impeller blade is operable to convey blood through the blood flow channel in at least one of the first predetermined position and the second predetermined position.

3. The catheter pump of claim 2 , wherein the at least one impeller blade is at least partly separated from the cannula in at least one of the first and second predetermined positions.

4. The catheter pump of claim 3 , wherein the at least one impeller blade is collapsible.

5. The catheter pump of claim 4 , wherein the cannula is expandable.

6. The catheter pump of claim 5 , wherein the cannula includes a shape memory material.

7. The catheter pump of claim 2 , further comprising an actuator operable to cause a relative repositioning of the at least one impeller blade between the first and second predetermined positions.

8. The catheter pump of claim 7 , wherein the actuator includes a knob, a button, a spring, or a motor.

9. The catheter pump of claim 1 , wherein the at least one impeller blade is slidably movable within the blood flow channel.

10. The catheter pump of claim 1 , wherein the inlet flares radially outwardly relative to the constant diameter of the blood flow channel.

11. A catheter pump comprising:
a cannula comprising an inlet having a varying internal diameter, an outlet having a varying internal diameter, and a blood flow channel having a uniform internal diameter extending between the inlet and the outlet; and
at least one impeller blade operable to convey blood through the blood flow channel from the inlet to the outlet;
wherein the at least one impeller blade is axially translatable relative to the cannula between respectively different first and second positions.

12. The catheter pump of claim 11 , wherein in the first position the at least one impeller blade is entirely within the blood flow channel.

13. The catheter pump of claim 12 , wherein in the second position the at least one impeller blade is at least partially withdrawn from the blood flow channel.

14. The catheter pump of claim 13 , further comprising an actuator configured to cause a transition of the at least one impeller blade between the first and second positions.

15. The catheter pump of claim 14 , wherein the actuator includes a knob, a button, a spring, or a motor.

16. The catheter pump of claim 15 , wherein the cannula includes a shape memory material.

17. The catheter pump of claim 11 , wherein the cannula is expandable.

18. The catheter pump of claim 11 , wherein the varying internal diameter of the inlet exceeds the uniform internal diameter of the blood flow channel.

19. A catheter pump comprising:
an expandable cannula comprising a tapered inlet zone, a tapered outlet zone, and a blood flow channel extending between the tapered inlet zone and the tapered outlet zone;
at least one impeller blade operable to convey blood from the inlet to the outlet, wherein the at least one impeller blade is axially movable relative to the expandable cannula along a longitudinal axis; and
an actuator operable to adjust a relative axial spacing of the at least one impeller blade with respect to the inlet.

20. The catheter pump of claim 19 , further comprising an impeller body, wherein the impeller body is slidably moveable within the blood flow channel between a first adjusted position and a second adjusted position.

21. The catheter pump of claim 19 , wherein the at least one impeller blade is at least partially separated from the tapered inlet in one of the first and second adjusted positions.

22. The catheter pump of claim 19 , wherein the actuator includes a knob, a button, a spring, or a motor.

23. The catheter pump of claim 19 , wherein the tapered inlet zone includes an outwardly flared taper relative to a longitudinal axis of the blood flow channel.

Assignees

• Tc1 Llc

Inventors

• King Alexander
• Panus David
• Eidenschink Tracee
• Pocrnich John
• Griffin Kevin

Classifications

• A61M60/174

  discharging the blood to the ventricle or arterial system via a cannula internal to the ventricle or arterial system · CPC title

• A61M60/13 Primary

  by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system · CPC title

• A61M60/414

  transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter · CPC title

• A61M60/585

  User interfaces · CPC title

• A61M60/825

  Contact bearings, e.g. ball-and-cup or pivot bearings · CPC title