Abiomed

Devices and techniques for estimating/detecting a location of a mixing cloud in a vessel of a subject may be provided. The techniques may include positioning a first tubular member within the vessel and flowing blood through a first lumen from a proximal end to a distal end of either the first tubular member or a second tubular member in a direction retrograde to a direction blood is natively flowing in the vessel. The techniques may include determining a plurality of blood-related characteristics of blood flowing in the vessel, such as arterial blood oxygen saturation values, each determined from blood acquired at a different axial position along the first tubular member, and/or pressure values, each determined from a pressure sensor at different axial positions along an exterior surface of the first tubular member. The techniques may include estimating a location of the mixing cloud based on the blood-related characteristics.

A device, system, and method of use are provided. The device includes a cannula having a lumen extending therethrough, an inflow cage coupled to one end of the cannula and an outflow cage coupled to the other end of the cage. The inflow cage includes an inflow check valve that is configured to allow blood to flow into the lumen only when a pressure inside the lumen is less than a pressure of blood external to the inflow check valve. The outflow cage includes an outflow check valve that is configured to allow blood to flow out of the lumen through at least one outlet only when a pressure in the lumen is greater than a pressure of blood external to the outflow check valve. A catheter is operably coupled the outflow cage. A pump capable of generating positive and negative pressures is operably coupled to the lumen.

A modular blood-gas exchange system is provided. The system may include a first oxygenator manifold, a second oxygenator manifold, and a plurality of blood-gas exchange cartridges removably coupled to the first and second oxygenator manifolds. The first oxygenator manifold may include a plurality of first blood ports. The second oxygenator manifold may include a plurality of second blood ports. Each blood-gas exchange cartridges may be configured to allow blood and a sweep gas to flow through the removably attachable cartridge, and may be configured to allow a gas molecule to transfer between the sweep gas and the blood.

An integrated sheath assembly for inserting f a medical device such as a percutaneous pump into a vessel can include a first sheath having a first lumen defining a first opening between proximal and distal ends of the first sheath for passage of a portion of the pump and a second sheath having a second lumen defining a second opening between proximal and distal ends of the second sheath. The second lumen is expandable to allow passage of the first sheath containing the portion of the pump. The first sheath fills a space between the second sheath and the portion of the percutaneous pump when the first sheath containing the percutaneous pump is inserted into the second lumen. The first sheath has a first hub, and the second sheath has a second hub. In some embodiments, a single sheath and a movable connector can be integrated on the medical device.

A blood pump is provided, that is configured to be disposed within the inferior vena cava (IVC). The blood pump may include a cannula having an inlet and an outlet, and an impeller configured to cause blood to flow through the cannula from the inlet towards the outlet. The inlet may be configured to be disposed at or near where the renal veins connect to the IVC. An occlusive balloon, anchor(s), and/or fixate(s) may be operably coupled to a surface of the cannula. A film may be coupled to anchor(s) and/or fixate(s), to restrict the flow of blood past the film. Restriction of blood flow around the cannula creates a pressure gradient between the inlet and outlet in the IVC, allowing for effective decongestion of the venous compartment distal of the inlet. The anchor(s) and/or fixate(s) may prevent vein collapse during operation due to increased negative pressures.

An intravascular blood pump (200) includes a pump housing (211) having an input port (214) and an output port (216). A relatively short intake cannula (226) may draw blood in through an intake port (230) and deliver the blood to the input port (214) of the pump housing (211). The intake cannula (226) is relatively short, to prevent excess hydraulic loss. An outflow hose (234) is connected to the output port (216) of the pump housing (211), so as to convey blood exiting the output port (216) through the outflow hose (234) in a downstream direction to a discharge port (238), e.g. into an aorta or other blood vessel (205). Despite the short intake cannula (226), the outflow hose (234) longitudinally separates the intake port (230) from the discharge port (238) sufficiently so the intake port (230) and the discharge port (238) remain on opposite sides of a heart valve, despite inadvertent longitudinal shifts of the intravascular heart pump (200).

A crimp tool facilitates crimping a resiliently radially compressible human-implantable catheter pump, and transferring the crimped pump into a tubular transfer sheath, by pulling the heart pump through an elongated tube that defines a tapered longitudinal bore. The bore has an inside dimension that tapers gradually along the length of the bore. A large end of the bore is sufficient to accept an uncrimped heart pump. A small end of the bore has a dimension similar to an inside dimension of the transfer sheath. A proximal end of the tube has a hub. A proximal end of a bore through the hub is configured to receive a distal end portion of the transfer sheath coaxially with the tube bore. Optionally, a latch is configured to releasably restrain the distal end portion of the transfer sheath within the hub.

Disclosed is a blood pump rotor, and an intravascular blood pump that utilizes the rotor. The blood pump rotor is configured to rotate around an axis of rotation, and comprises a distal portion and a proximal portion. The distal portion includes a rotor hub, which tapers in a distal direction. The rotor hub has at least one blade extending outward from the rotor hub. Further, a distal end of said rotor hub extends distally beyond a most distal portion of the at least one blade. The proximal portion, which is connected to the distal portion, has permanent magnets arranged so as to form a Halbach array generating a magnetic field having a magnetic flux in a proximal direction that is greater than a magnetic flux in a distal direction, said first magnetic flux being greater than said second magnetic flux. The Halbach array comprises an alternating arrangement of axial magnetized magnets and circumferential magnetized magnets. At least one secondary blade is provided on a proximal surface of at least one circumferential magnetized magnet, wherein the at least one secondary blade extends axially in a proximal direction.

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