Percutaneous circulatory support device facilitating reduced hemolysis
AssigneeBoston Scientific Scimed, Inc.
InventorsAnthony Malone, Olena Pernatiy, Javier Palomar-Moreno
Life of this patent
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Abstract
A percutaneous circulatory support device includes an impeller disposed within an impeller housing. The impeller is rotatable relative to the impeller housing to cause blood to flow through the percutaneous circulatory support device. The device further includes a liquid carrier carrying a liquid. The liquid carrier is rotatable relative to the impeller housing to cause the liquid to form outwardly extending menisci at a plurality of apertures of the liquid carrier.
Claims20
A percutaneous circulatory support device, comprising:
- an impeller housing;
- an impeller disposed within the impeller housing, the impeller being rotatable relative to the impeller housing to cause blood to flow through the percutaneous circulatory support device;
- a viscous liquid that is not blood;
- and
- a liquid carrier disposed within the impeller housing, the liquid carrier comprising an interior chamber having the liquid located therein and a plurality of apertures joining the interior chamber to an exterior of the liquid carrier, the liquid carrier being rotatable relative to the impeller housing to cause the liquid to form outwardly extending menisci at the plurality of apertures and seal a proximal portion of the impeller housing from blood during rotation of the liquid carrier,
- wherein the plurality of apertures are disposed proximal of the impeller.
A percutaneous circulatory support device, comprising:
- a housing;
- a motor coupled to the housing;
- a driving magnet operatively coupled to the motor;
- a viscous liquid that is not blood;
- and
- a liquid carrier disposed within the housing, the liquid carrier comprising a magnetic material and being operatively coupled to the drive motor, the liquid carrier comprising an interior chamber having the liquid located therein and a plurality of apertures joining the interior chamber to an exterior of the liquid carrier;
- and
- an impeller disposed within the housing, the impeller comprising a plurality of blades extending radially therefrom;
- wherein the motor is configured to rotatably drive, via the driving magnet, the liquid carrier and the impeller together relative to the housing, the liquid carrier thereby causing the liquid to form outwardly extending menisci at the plurality of apertures that contact a wall of the impeller housing to seal a proximal portion of the impeller housing from blood during rotation of the liquid carrier, and the impeller thereby causing blood to flow through the percutaneous circulatory support device;
- wherein the plurality of apertures are disposed proximal of the plurality of blades.
A method for using a percutaneous circulatory support device, comprising:
- positioning the percutaneous circulatory support device at a target location within a patient, the percutaneous circulatory support device comprising a liquid carrier;
- rotating an impeller of the percutaneous circulatory support device to cause blood to flow through the percutaneous circulatory support device;
- and
- rotating the liquid carrier of the percutaneous circulatory support device having a viscous liquid located therewithin that is not blood to cause the liquid carried by the liquid carrier to form outwardly extending menisci at a plurality of apertures of the liquid carrier, the plurality of apertures disposed proximal of the impeller, the liquid thereby creating positive pressure that at least partially counteracts pressure created by the impeller and sealing a proximal portion of a housing of the impeller from blood during rotation of the liquid carrier.
Dependencies are inferred from the claim text.