A device for reducing pressure within a lumen includes a reservoir structured for holding a fluid therein, an injection port in fluid communication with the reservoir, a compliant body structured to expand and contract upon changes in pressure, and a conduit extending between and fluidly coupling the reservoir and the compliant body. The fluid may be a compressible or a noncompressible fluid.

A device for reducing pressure within a lumen includes a reservoir structured for holding a fluid therein, an injection port in fluid communication with the reservoir, a compliant body structured to expand and contract upon changes in pressure, and a conduit extending between and fluidly coupling the reservoir and the compliant body. The fluid may be a compressible or a noncompressible fluid.

An impeller for a pump is disclosed herein. The impeller can include a hub having a fixed end and a free end. The impeller can also have a plurality of blades supported by the hub. Each blade can have a fixed end coupled to the hub and a free end. The impeller can have a stored configuration and a deployed configuration, the blades in the deployed configuration extending away from the hub, and the blades in the stored configuration being compressed against the hub.

An impeller for a pump is disclosed herein. The impeller can include a hub having a fixed end and a free end. The impeller can also have a plurality of blades supported by the hub. Each blade can have a fixed end coupled to the hub and a free end. The impeller can have a stored configuration and a deployed configuration, the blades in the deployed configuration extending away from the hub, and the blades in the stored configuration being compressed against the hub.

A catheter pump system with a pump having a fluid displacement member in the blood flow channel, a motor and a motor controller having a pressure sensing port for connection to a control pressure source. The motor controller is arranged for causing motor speed to be increased in response to a reduction of pressure applied to the pressure sensing port and for causing motor speed to be reduced in response to an increase of pressure applied to the pressure sensing port. The motor may be a pneumatic motor for driving the pump and the motor controller may be arranged for controlling motor speed by reducing flow through a supply channel to the motor and allowing an increase of flow through the supply channel to the motor in response to control signals received via an input interface.

A catheter pump system with a pump having a fluid displacement member in the blood flow channel, a motor and a motor controller having a pressure sensing port for connection to a control pressure source. The motor controller is arranged for causing motor speed to be increased in response to a reduction of pressure applied to the pressure sensing port and for causing motor speed to be reduced in response to an increase of pressure applied to the pressure sensing port. The motor may be a pneumatic motor for driving the pump and the motor controller may be arranged for controlling motor speed by reducing flow through a supply channel to the motor and allowing an increase of flow through the supply channel to the motor in response to control signals received via an input interface.

Apparatus and methods for driving a circulatory assist device with motive power from a fluid motor. In one example a parallel plate Tesla-type of motor extracts power from the circulatory system of a biological unit to drive a non-positive displacement pump and increase blood pressure in the biological unit.

Apparatus and methods for driving a circulatory assist device with motive power from a fluid motor. In one example a parallel plate Tesla-type of motor extracts power from the circulatory system of a biological unit to drive a non-positive displacement pump and increase blood pressure in the biological unit.

An artificial heart system for human beings or other creatures, comprises at least one half of the heart, to be implemented into the body, instead of or in parallel to the biologic heart or outside of human body for example for a portable dialysis apparatus, maintaining or supporting at least one blood circulatory system or circuit of the human being or the other creature as a pump, completely or partially, and at least one drive unit and at least one control unit, preferably to be placed outside the body.

An artificial heart system for human beings or other creatures, comprises at least one half of the heart, to be implemented into the body, instead of or in parallel to the biologic heart or outside of human body for example for a portable dialysis apparatus, maintaining or supporting at least one blood circulatory system or circuit of the human being or the other creature as a pump, completely or partially, and at least one drive unit and at least one control unit, preferably to be placed outside the body.