A bearingless and sealless rotary blood pump is disclosed which provides multidirectional flow intended to provide low-pressure, high-volume right-sided partial assist circulatory support in a univentricular Fontan circulation on a permanent basis. The pump includes a housing and an impeller suspended in the center of the housing. The housing incorporates flow optimization features between inlet and outlet ends, as well as with the impeller surface. Large fluid gaps maintained between impeller and housing eliminate any potential for blood flow obstruction. The impeller contains some motor components. It includes a central stator and surrounding rotor. The motor includes a brushless DC outrunner electrical motor design. An electromagnetic stator core is surrounded by a circumferential passive magnetic ring. The rotor is further levitated about the stator spindle by a plurality of axially and radially located passive magnetic and hydrodynamic journal bearings on both ends of the spindle. The rotor is bearingless and sealless. During impeller rotation, blood entering the space between the rotor and stator is induced to flow by centrifugal pumping action and the fluid film separates the stator hydrodynamic bearings from the rotor so that there is no direct mechanical contact between the rotor and stator.

A catheter pump assembly is provided that includes a proximal a distal portion, a catheter body, an impeller, and a flow modifying structure. The catheter body has a lumen that extends along a longitudinal axis between the proximal and distal portions. The impeller is disposed at the distal portion. The impeller includes a blade with a trailing edge. The flow modifying structure is disposed downstream of the impeller. The flow modifying structure has a plurality of blades having a leading edge substantially parallel to and in close proximity to the trailing edge of the blade of the impeller and an expanse extending downstream from the leading edge. In some embodiments, the expanse has a first region with higher curvature and a second region with lower curvature. The first region is between the leading edge and the second region.

A heart support device for circulatory assistance is disclosed. The device comprises a chamber body defining a chamber having an internal volume configured to be filled with blood. The chamber body has a first opening and the chamber is dimensioned such that the first opening and the chamber are fully disposed within a chamber of the human heart. A dynamic volume body is provided and configured to be inflated or deflated to alternately increase or decrease the interior volume of the chamber. A catheter comprising at least one lumen in fluid communication with the dynamic volume body is configured to deliver fluid to the dynamic volume body to inflate the dynamic volume body. A directional flow structure is configured to direct a flow of blood out of the chamber in a direction substantially aligned with a direction in which the catheter extends.

A heart support device for circulatory assistance is disclosed. The device comprises a chamber body defining a chamber having an internal volume configured to be filled with blood. The chamber body has a first opening and the chamber is dimensioned such that the first opening and the chamber are fully disposed within a chamber of the human heart. A dynamic volume body is provided and configured to be inflated or deflated to alternately increase or decrease the interior volume of the chamber. A catheter comprising at least one lumen in fluid communication with the dynamic volume body is configured to deliver fluid to the dynamic volume body to inflate the dynamic volume body. A directional flow structure is configured to direct a flow of blood out of the chamber in a direction substantially aligned with a direction in which the catheter extends.

A blood pump has a hollow body in which an impeller with a spiral blading produces an axial propulsion of blood along the impeller, as well as an at least partly actively stabilized magnetic bearing device and a hydrodynamic bearing device for the impeller. The impeller may be set into a rotation about a rotation axis of the impeller with a motor stator located outside the hollow body. The hollow body has an inlet for the flow of blood into the hollow body in an inflow direction which is essentially parallel to the rotation axis, and an outlet for the outflow of the blood out of the hollow body in an outflow direction which is offset to the rotation axis of the impeller to produce a non-zero outflow angle (α) between the inflow direction and the outflow direction. A total artificial heart can be formed from two such blood pumps.

An axial flow blood pump having a rotor rotatably mounted in a housing. The rotor includes at least two rotor blades having different configurations.

An extracorporeal blood pump assembly includes a blood pump and an extracorporeal membrane oxygenator (ECMO). The blood pump includes a pump housing, a rotor, and a flow converter positioned downstream from the rotor to convert non-axial flow from the rotor to axial flow. The pump housing defines an inlet and an outlet. The ECMO includes a membrane housing and an oxygenator membrane disposed within the membrane housing. The membrane housing is removably connected to the pump housing at one of the pump housing inlet and the pump housing outlet.

An extracorporeal blood pump assembly includes a blood pump and an extracorporeal membrane oxygenator (ECMO). The blood pump includes a pump housing, a rotor, and a flow converter positioned downstream from the rotor to convert non-axial flow from the rotor to axial flow. The pump housing defines an inlet and an outlet. The ECMO includes a membrane housing and an oxygenator membrane disposed within the membrane housing. The membrane housing is removably connected to the pump housing at one of the pump housing inlet and the pump housing outlet.

Rotary lobe pump, comprising a pump housing (2, 9, 10) with a substantially cylindrical pump chamber (8) and a rotary lobe as rotor (1) with at least two blades (3) arranged opposite each other or evenly distributed in the circumferential direction and at least one sealing valve (4), characterized in that at least two sealing valves (4a, 4b) arranged opposite one another or uniformly distributed in the circumferential direction are provided, the at least two sealing valves (4a, 4b) being rotatable or pivotable, and an inlet duct (11) to at least two inlet openings (6) into the pump chamber (8) and an outlet duct (12) from at least two outlet openings (7) out of the pump chamber (8) being provided axially in a rotor axial tube (18), extending from the opposite axial ends and separated from one another.

Rotary lobe pump, comprising a pump housing (2, 9, 10) with a substantially cylindrical pump chamber (8) and a rotary lobe as rotor (1) with at least two blades (3) arranged opposite each other or evenly distributed in the circumferential direction and at least one sealing valve (4), characterized in that at least two sealing valves (4a, 4b) arranged opposite one another or uniformly distributed in the circumferential direction are provided, the at least two sealing valves (4a, 4b) being rotatable or pivotable, and an inlet duct (11) to at least two inlet openings (6) into the pump chamber (8) and an outlet duct (12) from at least two outlet openings (7) out of the pump chamber (8) being provided axially in a rotor axial tube (18), extending from the opposite axial ends and separated from one another.