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US 9,162,017 B2Granted
Expandable vascular pump
AssigneeMinnetronix, Inc.
InventorsDon W. E. Evans, Mark Schneider, Douglas Wahnschaffe, Scott Klimek, Reed Houge
Life of this patent
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Abstract
A pump for inducing flow within a vascular system comprises a cannula having a first configuration for deployment within the vascular system and a second configuration for directing the fluid flow within the vascular system, where the second configuration has a greater diameter than the first configuration. An impeller is configured to induce the fluid flow by rotation about an axis. The impeller has a first radius in the first configuration and a second radius in the second configuration, where the second radius is greater than the first radius.
Claims25
A pump for inducing flow within a vascular system, the pump comprising:
- a cannula having a first configuration for deployment within the vascular system and a second configuration for directing the fluid flow within the vascular system, the second configuration having a greater diameter than the first configuration, the cannula comprising a frame member that, when in the second configuration, extends axially and radially in proximal and distal diameter transition portions of the cannula and axially in a mid-portion of the cannula between the diameter transition portions, wherein the frame member comprises a longitudinal pattern in the mid portion or the diameter transition portions and comprises a different pattern comprising a helical or mesh pattern in the other;
- and
- an impeller configured to induce the fluid flow through the cannula by rotation about an axis, the impeller having a blade angle that transitions between generally perpendicular to the axis of rotation and generally parallel to the axis of rotation, the impeller further having a first radius in the first configuration and a second radius in the second configuration, the second radius greater than the first radius.
A device comprising:
- a cannula having a collapsed configuration for deployment within a circulatory system and an expanded configuration for directing fluid flow within the circulatory system, the expanded configuration having a diameter greater than the collapsed configuration, the cannula comprising a support member that, when in the second configuration, extends axially and radially in proximal and distal diameter transition portions of the cannula and axially in a mid-portion of the cannula between the diameter transition portions, wherein the frame member comprises a longitudinal pattern in the mid portion or the diameter transition portions and comprises a different pattern comprising a helical or mesh pattern in the other;
- an impeller configured to induce the fluid flow through the cannula by rotation about an axis, the impeller comprising a blade having a greater radius in the expanded configuration than in the collapsed configuration and having a blade angle that transitions between generally perpendicular to the axis of rotation and generally parallel to the axis of rotation;
- and
- a catheter extending to a proximal end of the cannula, the catheter configured for positioning the cannula within the circulatory system.
1 more element
A method comprising:
- inserting a cannula into a vascular system in a deployment configuration, the cannula having an operable configuration with a substantially larger diameter than the deployment configuration, the cannula comprising a support member that, when in the second configuration, extends axially and radially in proximal and distal diameter transition portions of the cannula and axially in a mid-portion of the cannula between the portions, wherein the frame member comprises a longitudinal pattern in the mid portion or the diameter transition portions and comprises a different pattern comprising a helical or mesh pattern in the other;
- guiding the cannula to a desired location within the circulatory system;
- expanding the cannula to the operational configuration;
- expanding an impeller within the cannula, the impeller comprising a blade angle that transitions between generally perpendicular to an axis of rotation and generally parallel to the axis of rotation;
- and
- rotating the impeller about the axis within the cannula to drive fluid through the vascular system.
3 more elements
Dependencies are inferred from the claim text.