A catheter pump system includes a shaft assembly, an impeller coupled to a distal portion of the shaft assembly, and a motor assembly coupled to a proximal portion of the shaft assembly. The motor assembly is configured to drive the impeller via the shaft assembly. The motor assembly includes a rotor, a stator disposed radially outward of the rotor, and a rotor chamber disposed radially between the stator and the rotor. The rotor chamber at least partially encloses the rotor. The rotor chamber is at least partially filled with a lubricant to reduce a friction of the rotor during rotation thereof.

A catheter pump system includes a shaft assembly, an impeller coupled to a distal portion of the shaft assembly, and a motor assembly coupled to a proximal portion of the shaft assembly. The motor assembly is configured to drive the impeller via the shaft assembly. The motor assembly includes a rotor, a stator disposed radially outward of the rotor, and a rotor chamber disposed radially between the stator and the rotor. The rotor chamber at least partially encloses the rotor. The rotor chamber is at least partially filled with a lubricant to reduce a friction of the rotor during rotation thereof.

A system or device for isolating pulmonary pressure from left atrial pressure and/or improving cardiac output. The device may be an implantable cardiac device comprising an intravascular shield. The system may comprise an intravascular shield and a trans-septal delivery sheath. The intravascular shield can be sized and configured to be positioned in a pulmonary vein or a left atrium to restrict fluid flow from the left atrium through one or more pulmonary veins to the lungs while allowing fluid flow from the lungs through the one or more pulmonary veins to the left atrium. The trans-septal delivery sheath can be configured to contain the intravascular shield in a collapsed configuration and deliver the intravascular shield to the left atrium.

A system or device for isolating pulmonary pressure from left atrial pressure and/or improving cardiac output. The device may be an implantable cardiac device comprising an intravascular shield. The system may comprise an intravascular shield and a trans-septal delivery sheath. The intravascular shield can be sized and configured to be positioned in a pulmonary vein or a left atrium to restrict fluid flow from the left atrium through one or more pulmonary veins to the lungs while allowing fluid flow from the lungs through the one or more pulmonary veins to the left atrium. The trans-septal delivery sheath can be configured to contain the intravascular shield in a collapsed configuration and deliver the intravascular shield to the left atrium.

A circulatory support device includes a flexible cannula having a fluid outlet at a proximal end; and a pump assembly disposed at a distal end of the flexible cannula. The pump assembly includes a pump housing having a fluid inlet defined therein; a motor disposed within a distal end of the housing; and an impeller, driven to rotate by the motor, and configured to push blood toward the fluid outlet.

An implantable right ventricular assist device configured to be implanted within the right ventricle of a heart, including a percutaneously deliverable centrifugal pump configured to carry the blood from the right ventricle to the pulmonary artery; an exit cylinder configured to secure directly or indirectly the centrifugal pump within a portion of the pulmonary artery; and a power source. Also, a method to percutaneously and transluminally implant the right ventricular assist device within the right ventricle of a patient's heart. Further, the use of the right ventricular assist device to long-term assist of the right ventricle of a patient's heart.

A controller for a blood pump, in particular a catheter-based intravascular blood pump, configured to utilize detected or determined aortic pressures and left ventricular pressures in order to calculate a coupling factor, which is then used to determine how to adjust the rotational speed of the blood pump, such as when the blood pump is used in conjunction with ECMO devices.

A controller for a blood pump, in particular a catheter-based intravascular blood pump, configured to utilize detected or determined aortic pressures and left ventricular pressures in order to calculate a coupling factor, which is then used to determine how to adjust the rotational speed of the blood pump, such as when the blood pump is used in conjunction with ECMO devices.

A catheter blood pump includes a cannula with an expandable central portion having a proximal end, a distal end and a blood flow conduit therebetween. A flexible inlet portion at the distal end is provided with a plurality of spaced apart inlet struts configured to prevent an obstruction from entering, and a flexible outlet portion is provided with a plurality of spaced apart outlet struts operative to reduce a swirl velocity of blood, wherein the plurality of spaced apart inlet struts and the plurality of spaced apart outlet struts are fabricated from a collapsible shape memory material.

A catheter blood pump includes a cannula with an expandable central portion having a proximal end, a distal end and a blood flow conduit therebetween. A flexible inlet portion at the distal end is provided with a plurality of spaced apart inlet struts configured to prevent an obstruction from entering, and a flexible outlet portion is provided with a plurality of spaced apart outlet struts operative to reduce a swirl velocity of blood, wherein the plurality of spaced apart inlet struts and the plurality of spaced apart outlet struts are fabricated from a collapsible shape memory material.