Portable blood pumping system
AssigneeThe Cleveland Clinic Foundation
InventorsAndrew Reeves, David Dudzinski, Fernando Casas, William Smith
Life of this patent
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Abstract
A pump (100) includes a pump housing (200) having a fluid inlet (114) and a fluid outlet (116). An impeller (252) is disposed within the pump housing (200) and is rotatable about an axis (156) to move fluid from the inlet (114) to the outlet (116). A flexible drive spring (270) connects the impeller to a rotating drive mechanism (312). The spring (270) transmits torque to the impeller (252) from the drive mechanism (312) and preloads the impeller against a surface (232) of the pump housing (200).
Claims38
A pump comprising:
- a pump housing having a fluid inlet and a fluid outlet;
- an impeller disposed within the pump housing and rotatable about an axis to move fluid from the inlet to the outlet;
- a flexible drive spring connecting the impeller to a rotating drive mechanism, the spring transmitting torque to the impeller from the drive mechanism and preloading the impeller against a surface of the pump housing.
A pump comprising:
- a pump housing having a fluid inlet and a fluid outlet;
- an impeller disposed within the pump housing and rotatable about an axis to move fluid from the fluid inlet to the fluid outlet;
- a face seal including a fixed face on the pump housing and a rotatable face on the impeller;
- and
- a resilient member that preloads the rotatable face against the fixed face and transmits torque to the impeller.
A pump comprising:
- a prime mover;
- a pump housing having a fluid inlet and a fluid outlet;
- an impeller disposed within the pump housing and rotatable about an axis to move fluid from the fluid inlet to the fluid outlet;
- a face seal including a fixed face on the pump housing and a rotatable face on the impeller;
- a spring that preloads the rotatable face against the fixed face and transmits torque to the impeller from the prime mover;
- a sleeve that encircles the spring along a substantial portion of the length of the spring and helps prevent buckling of the spring;
- and
- means for reinforcing at least one end portion of the spring.
A blood pumping system comprising:
- an extracorporeal blood pump comprising a motor, a pump housing having an inlet and an outlet, and an impeller disposed within the pump housing and rotatable about an axis to move fluid from the inlet to the outlet;
- a portable control unit operative to supply power to the pump and receive signals from the pump, the control unit comprising a battery power supply;
- the blood pump having a priming volume of no more than 12 milliliters and having a pump head hydraulic efficiency of at least 40 percent.
Dependencies are inferred from the claim text.