A percutaneous circulatory support device includes a housing and an impeller disposed within the housing. The impeller is configured to rotate relative to the housing to cause blood to flow through the housing. A motor is operably coupled to the impeller, and the motor is configured to rotate the impeller relative to the housing. A catheter is coupled to the motor, and a pressure sensor is coupled to the catheter and disposed proximally relative to the housing.

A blood pump comprises a pump casing having a blood flow inlet and a blood flow outlet, and an impeller arranged in said pump casing and rotatably supported in the pump casing by a bearing so as to be rotatable about an axis of rotation. The impeller has blades for conveying blood from the blood flow inlet to the blood flow outlet. The bearing comprises at least one stationary bearing portion coupled to the pump casing and having a stationary bearing surface that faces radially outwards. The bearing further comprises a rotating bearing surface interacting with the stationary bearing surface to form the bearing, wherein the rotating bearing surface faces radially inwards and is formed on an exposed radially inner edge of the blades. The blades are designed to draw blood deposit on the stationary bearing surface in a radially outward direction.

This invention relates to an intravascular blood pump, comprising a pumping device with a pump casing having a primary blood flow inlet and a primary blood flow outlet which are hydraulically connected by a primary blood flow passage, a primary impeller with an upstream end and a downstream end being configured to convey a primary blood flow from the primary blood flow inlet to the primary blood flow outlet along the primary blood flow passage, a drive unit configured to rotate the primary impeller about an axis of rotation, an impeller bearing supporting the upstream end of the primary impeller, a central opening extending axially through the impeller bearing, and at least one secondary blood flow passage in the primary impeller, the at least one secondary blood flow passage having a secondary blood flow inlet in axial alignment with the central opening of the impeller bearing and each of the at least one secondary blood flow passage having a secondary blood flow outlet, wherein at least one secondary blood flow passage is configured to convey a secondary blood flow from the secondary blood flow inlet to the secondary blood flow outlet, and wherein the secondary blood flow outlet connects the at least one secondary blood flow passage to the primary blood flow passage at a location axially between the upstream and downstream ends of the primary impeller.

This invention relates to an intravascular blood pump, comprising a pumping device with a pump casing having a primary blood flow inlet and a primary blood flow outlet which are hydraulically connected by a primary blood flow passage, a primary impeller with an upstream end and a downstream end being configured to convey a primary blood flow from the primary blood flow inlet to the primary blood flow outlet along the primary blood flow passage, a drive unit configured to rotate the primary impeller about an axis of rotation, an impeller bearing supporting the upstream end of the primary impeller, a central opening extending axially through the impeller bearing, and at least one secondary blood flow passage in the primary impeller, the at least one secondary blood flow passage having a secondary blood flow inlet in axial alignment with the central opening of the impeller bearing and each of the at least one secondary blood flow passage having a secondary blood flow outlet, wherein at least one secondary blood flow passage is configured to convey a secondary blood flow from the secondary blood flow inlet to the secondary blood flow outlet, and wherein the secondary blood flow outlet connects the at least one secondary blood flow passage to the primary blood flow passage at a location axially between the upstream and downstream ends of the primary impeller.

A method for treating a patient may include establishing an anastomosis between a pulmonary artery and an aorta; and pumping blood from the pulmonary artery to the aorta when the pulmonary artery has a pressure lower than or equal to a pressure of the aorta.

The present disclosure provides catheter pump system including a catheter assembly configured to be at least partially inserted into a left ventricle (LV). The catheter assembly has a proximal end and a distal end, and includes an elongate body extending between the proximal end and the distal end. The catheter pump system further includes a pressure sensor disposed at the distal end and configured to measure a pressure within a left ventricle when the catheter assembly is inserted.

A catheter pump system is provided. The catheter pump system includes a catheter pump and a fluid system located within the catheter pump. The catheter pump has a proximal end, a distal end, and an elongate body extending therebetween, the elongate body defining at least an inner lumen at least partially sealed by a septum located at the distal end. The fluid system is configured to pressurize the catheter pump with fluid. The catheter pump further includes a moisture absorbing seal proximate the septum.

A temporary, removable mechanical circulatory support heart-assist device has at least two propellers or impellers. Each propeller or impeller has a number of blades arranged around an axis of rotation. The blades are configured to pump blood. The two propellers or impellers rotate in opposite directions from each other. The device can be configured to be implanted and removed with minimally invasive surgery.

A temporary, removable mechanical circulatory support heart-assist device has at least two propellers or impellers. Each propeller or impeller has a number of blades arranged around an axis of rotation. The blades are configured to pump blood. The two propellers or impellers rotate in opposite directions from each other. The device can be configured to be implanted and removed with minimally invasive surgery.

Mechanical circulatory supports configured to operate in series with the native heart are disclosed. In an embodiment, a centrifugal pump is used. In an embodiment, inlet and outlet ports are connected into the aorta and blood flow is diverted through a lumen and a centrifugal pump between the inlet and outlet ports. The supports may create a pressure rise between about 40-80 mmHg, and maintain a flow rate of about 5 L/min. The support may be configured to be inserted in a collinear manner with the descending aorta. The support may be optimized to replicate naturally occurring vortex formation within the aorta. Diffusers of different dimensions and configurations, such as helical configuration, and/or the orientation of installation may be used to optimize vortex formation. The support may use an impeller which is electromagnetically suspended, stabilized, and rotated to pump blood.