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Publication Number
US-12491356-B2
Publication Date
2025-12-09
Expiration Date
Abstract
A minimally invasive circulatory support platform that utilizes an aortic stent pump or pumps. The platform uses a low profile catheter-based techniques and provides temporary and chronic circulatory support depending on the needs of the patient. Further described is a wirelessly powered circulatory assist pump for providing chronic circulatory support for heart failure patients. The platform and system are relatively easy to place, have higher flow rates than existing systems, and provide improvements in the patient's renal function.
Core Innovation
The invention relates to a system for a circulatory assist pump configured for placement in a subject's aorta. The system includes interconnected wire-like elements that expand to an expanded state and define a cage having open areas sized to allow a highly open flow. In the expanded state, the interconnected wire-like elements expand to a circumference that applies a radial force to a wall of the subject's aorta sufficient to stabilize the cage against the wall while maintaining pulsatility of the subject's aorta.
An impeller is encaged by the cage and includes blades. The blades include a frame including a shape memory alloy configured to selectively change shape between a stowed shape and a deployed shape, and sheets of electroactive material configured to bend and alter the blades from the deployed shape to a modified shape in response to an applied electrical field.
In some configurations, multiple impellers are arranged in series, each impeller being encaged by the cage. In additional configurations, the blades are arm-like blades that rotate during operation to draw blood down a subject's aorta from the subject's heart, and in the deployed state the arm-like blades selectively change shape to improve blood flow and minimize turbulence, thrombosis risk, and/or hemolysis.
Claims Coverage
The document includes three independent claims that cover a cage stabilized by radial force while maintaining aortic pulsatility, an encaged impeller with shape memory alloy and electroactive material, a series arrangement of multiple impellers, and arm-like rotating blades configured to improve blood flow and reduce turbulence, thrombosis risk, and/or hemolysis.
Highly open flow cage stabilized by radial force while maintaining pulsatility
Interconnected wire-like elements configured to expand to an expanded state and define a cage including open areas sized to allow a highly open flow when placed within a subject's aorta, wherein the interconnected wire-like elements expand to a circumference that applies a radial force to a wall of the subject's aorta sufficient to stabilize the cage against the wall while maintaining pulsatility of the subject's aorta.
Impeller with shape memory alloy stowed-to-deployed blade change and electroactive electrical-field modification
An impeller encaged by the cage, the impeller comprising blades having a frame including a shape memory alloy configured to cause the blades to selectively change shape between a stowed shape and a deployed shape, and sheets of electroactive material configured to bend and alter the blades from the deployed shape to a modified shape in response to an applied electrical field.
Series arrangement of multiple impellers within the same stabilized cage
A plurality of impellers arranged in series, each impeller encaged by the cage and comprising blades including a frame with a shape memory alloy and sheets of electroactive material configured to bend and alter the blades from the deployed shape to a modified shape in response to an applied electrical field.
Arm-like rotating blades with deployed shape change to improve blood flow and reduce turbulence, thrombosis risk, and/or hemolysis
An impeller comprising arm-like blades that, during operation, rotate to draw blood down a subject's aorta from the subject's heart, wherein the arm-like blades, in a deployed state, are configured to selectively change shape to improve blood flow of the subject, minimize turbulence, minimize thrombosis risk, and/or minimize hemolysis of the subject's blood, wherein the arm-like blades comprise a frame including a temperature sensitive shape memory alloy and sheets of electroactive material configured to bend and alter the blades from a first shape to a second shape in response to an applied change in temperature and to alter the blades from the second shape to a modified shape in response to an applied electrical field.
Across the independent claims, the core coverage is a cage formed by interconnected wire-like elements that provides a highly open flow while being stabilized by radial force and maintaining aortic pulsatility, paired with an encaged impeller whose blades change between stowed and deployed shapes via a shape memory alloy and further change to a modified shape in response to an applied electrical field. The claims further extend to a plurality of impellers arranged in series and to arm-like rotating blades configured to improve blood flow and minimize turbulence, thrombosis risk, and/or hemolysis.
Stated Advantages
Improve blood flow of the subject.
Minimize turbulence.
Minimize thrombosis risk.
Minimize hemolysis.
Documented Applications
No documented applications found
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