An impeller for a pump is disclosed herein. The impeller can include a hub having a fixed end and a free end. The impeller can also have a plurality of blades supported by the hub. Each blade can have a fixed end coupled to the hub and a free end. The impeller can have a stored configuration and a deployed configuration, the blades in the deployed configuration extending away from the hub, and the blades in the stored configuration being compressed against the hub.

Catheter blood pumps that include a pump portion with an impeller. The blood pumps include an axially extendable member with a distal end that is disposed further distally than the distal end of the impeller, and a guide member extending through the pump portion and axially moveable relative to the pump portion, the guide member inoperable axial communication with the extendable member such that axial movement of the guide member causes axial movement of the extendable member relative to the pump portion.

Catheter blood pumps that include a pump portion with an impeller. The blood pumps include an axially extendable member with a distal end that is disposed further distally than the distal end of the impeller, and a guide member extending through the pump portion and axially moveable relative to the pump portion, the guide member inoperable axial communication with the extendable member such that axial movement of the guide member causes axial movement of the extendable member relative to the pump portion.

Blood pump devices having improved rotary seals for sealing a bearing assembly supporting a rotor provided herein. Such rotary seals are particularly suited for use in blood pump devices that include rotors having cantilevered supported through a sealed mechanical bearing disposed outside a blood flow path of the device to avoid thrombus formation caused by blood contact with the bearing. The rotary seal can include a first and second face seal that are preloaded with a deflectable compliance member incorporated into the pump housing or a pair of magnets. Such rotary seals can instead or further utilize tight fitment between components or a bio-absorbable fill material to seal an interface between the rotor shaft and pump housing to seal the bearing assembly from fluid flowing through the pump.

A sealed micropump includes an integrated motor and at least one impeller for generating fluid flow inside a housing of the micropump. The impeller includes a radial sliding bearing with a spider bearing for supporting an impeller pin of the impeller inside the housing. The impeller pin includes a sheathing of a material different from a material of the spider bearing.

A sealed micropump includes an integrated motor and at least one impeller for generating fluid flow inside a housing of the micropump. The impeller includes a radial sliding bearing with a spider bearing for supporting an impeller pin of the impeller inside the housing. The impeller pin includes a sheathing of a material different from a material of the spider bearing.

A catheter pump assembly is provided. The catheter pump assembly includes a proximal portion, a distal portion, a catheter body having a lumen extending along a longitudinal axis between the proximal and distal portions, an impeller disposed at the distal portion, and a stator disposed at a downstream location of the impeller to straighten flow downstream from the impeller. The stator is collapsible from a deployed configuration to a collapsed configuration.

A vascular access tube (2) for a fluid subject to a driving pressure comprises a wall (4) defining a main lumen. A portion of the wall comprises an access port (10) for an object (14) to be introduced through the wall. The access port comprises a biasing structure (12) which provides a self-closing behaviour that is sufficiently strong to remain fluid-tight when exposed to a driving pressure of up to 50 mmHg. The access port is therefore sufficiently fluid-tight to contain pressurised fluid flowing through the vascular access tube.

A blood pump includes a blood supply mechanism; a motor having a stator, a rotor and a shaft; a base body; a casing; a fixed side slide member having a first slide surface and fixed to the base body; and a rotary side slide member. A second insertion hole allows the shaft to pass therethrough is in the rotary side slide member. The shaft is fitted into the second insertion hole between the fixed side slide member and the blood supply mechanism. The second slide surface is slidable on the first slide surface in contact with the first slide surface by rotating together with the blood supply mechanism and the shaft A center of the core is at a position more to a +z direction side than a center (CM) of a permanent magnet.

The approach presented here concerns a pump for delivering a fluid. The pump comprises an impeller, a drive device with a shaft, a shaft housing and a sealing device. The impeller is shaped to deliver the fluid. The drive device with the shaft is designed to drive the impeller. The shaft housing is shaped to receive the shaft and/or the drive device. The sealing device comprises at least one casing sealing element and/or an impeller sealing element which is received between the drive device and the impeller and which is designed to prevent fluid from entering the drive device and/or the shaft casing during operation of the pump.