A ventricular support system including a light source, a fiber optic splitter, two or more filters, an intravascular blood pump having two or more sensor heads, and a photodetector is disclosed. At least some of the light transmitted by the light source is split by the fiber optic splitter such that a portion is transmitted to each of the two or more filters. Each portion of light is filtered by one of the two or more filters and transmitted to one of the two or more sensor heads. Light beams reflected from each of the two or more sensor heads are combined by the fiber optic splitter. At least some of the combined light beams are received by the photodetector. By only using a single light source and a single photodetector with the two or more sensor heads, the ventricular support system may have improved portability.

A minimally invasive circulatory support device, system, and related methods. The circulatory assist devices, systems, and methods use low profile catheter-based techniques and provide temporary and chronic circulatory support depending on the needs of the patient. The circulatory assist device, systems, and methods include a stent cage and an impeller. The stent cage is formed of a first material that is sufficiently rigid to expand radially outward and press against an artery wall is sufficiently deformable to collapse within the outer sheath. The impeller includes at least one blade formed of a second material that is sufficiently rigid to expand and retain shape while rotating and assisting blood to flow within the artery and is sufficiently deformable to collapse within the outer sheath with the stent cage.

A catheter pump system includes a catheter assembly having a proximal end, a distal end, and an elongate body extending therebetween, the elongate body defining at least an inner lumen; a motor assembly comprising a shaft assembly extending at least partially within the elongate body of the catheter assembly, the shaft assembly configured to rotate about an axis; a flow diverter housing defining a chamber and a fluid pathway through which a proximally-conveyed fluid flows, wherein the shaft assembly extends outward from the chamber into the inner lumen of the elongate body; and a seal mounted to and extending around the shaft assembly, the seal configured to inhibit fluid within the elongate body of the catheter assembly from entering the chamber at least about an outer periphery of the shaft assembly.

A catheter pump system includes a catheter assembly having a proximal end, a distal end, and an elongate body extending therebetween, the elongate body defining at least an inner lumen; a motor assembly comprising a shaft assembly extending at least partially within the elongate body of the catheter assembly, the shaft assembly configured to rotate about an axis; a flow diverter housing defining a chamber and a fluid pathway through which a proximally-conveyed fluid flows, wherein the shaft assembly extends outward from the chamber into the inner lumen of the elongate body; and a seal mounted to and extending around the shaft assembly, the seal configured to inhibit fluid within the elongate body of the catheter assembly from entering the chamber at least about an outer periphery of the shaft assembly.

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.

This invention is directed to a corrosion resistant permanent magnet, to a method for producing a corrosion resistant permanent magnet, and to an intravascular blood pump comprising the magnet. The magnet is corrosion resistant due to a composite coating comprising a metal layer, optionally a metal oxide layer, a layer formed from poly(2-chloro-p-xylylene), and a linker layer between the metal oxide layer and the poly(2-chloro-p-xylylene) layer.

A pumping system (200) for controlling the flow of interatrial blood comprises, housed inside a container (201), a control element (30, 30′, 30″) of the interatrial blood flow. The control element comprises: at least one worm screw (31), the rotation of which creates a two-way flow of interatrial blood; or a pair of counter-rotating propellers (31′); or a pair of membranes (31″) whose deformation creates a two-way flow of interatrial blood; or a flexible structure (31″) whose change in volume within the container (201) creates a two-way flow of interatrial blood.

The invention relates to a device for circulatory support of the heart and to a corresponding method with a holding means which is configured such that it can be implanted intracardially in the left and/or right ventricular outflow tract of the heart by means of a catheter, preferably using an endovascular method, through a femoral access and/or a percutaneous transventricular, transseptal, transapical or transvenous access, wherein the holding means comprises an anchoring means which can be fixed in the subcommissural triangle underneath the aortic valve and the pulmonary valve, respectively in the flow direction of the blood on the ventricular side of the aortic valve and the pulmonary valve, respectively, a pump which is configured such that it can be fixed in the holding means by means of a catheter, preferably using an endovascular method, through a femoral access and/or a percutaneous transventricular, transseptal, transapical or transvenous access, wherein the pump (a) can either be inserted releasably into the holding means after the holding means has been fixed by means of the anchoring means in the subcommissural triangles underneath the aortic valve and the pulmonary valve, respectively or (b) is firmly connected to the collapsible and expandable anchoring means.

A heart pump assembly includes an impeller blade coupled to a rotor or a drive shaft, a cannula, a distal projection coupled to a distal end of the cannula and a blood inlet having a plurality of apertures. The plurality of apertures is radially oriented and disposed about a circumference of the cannula. The plurality of apertures includes at least a first ring of apertures which are proximal to the distal projection and a second ring of apertures which are proximal of the first ring of apertures. The plurality of apertures can allow the heart pump assembly to continue to function if anatomical structures or tissue become suctioned to a portion of the heart pump.

The subject matter of the present invention is a pump arrangement (1, 10, 20, 30, 40, 50), in particular for use in the body's own vessels, having a pump (11, 41, 51) and a sheath (12, 42, 52) receiving the pump, bounding a flow passage (S) and having a distal intake opening (13, 43, 53) and a proximal outflow opening (14, 29, 39, 44, 54) for producing a driving flow by means of the pump, wherein the pump is arranged in a first fluid-tight section (12a, 42a, 52a) having the distal intake opening and a second fluid-tight section (12b, 42b, 52b) includes the proximal outflow opening. In accordance with the invention, a further inlet opening (15) is present between the first section and the second section and is arranged between the intake opening and the outflow opening, with the first section and the second section being arranged with respect to one another such that the inlet opening opens into the flow proximal to the pump.