Duplex blood pump for heart surgery
AssigneeSpin Corporation
InventorsLloyd Hubbard, Earl Clausen
Life of this patent
Estimating the term…
Abstract
A two-chambered centrifugal blood pump for pumping biological fluids such as blood. One chamber is for pumping blood through the natural lungs, and a second chamber is for pumping blood through the remainder of the body. Each chamber has it's own inlet and outlet ports for attachment of tubing and cannulae. A small, adjustable clamp may alternatively be provided if minor adjustments of pressure to both the pulmonary and systemic circuits is required.
Claims27
A centrifugal pump for pumping biological fluids such as blood, the pump comprising:
- a housing defining first and second pumping chambers, the first pumping chamber in fluid communication with the second pumping chamber;
- a first inlet and first outlet in communication with the first pumping chamber;
- a second inlet and second outlet in communication with the second pumping chamber;
- a shaft extending in an axial direction in the housing for defining a rotational axis;
- a first impeller positioned in the first pumping chamber;
- and
- a second impeller positioned in the second pumping chamber.
A heart/lung apparatus for connection to a patient during heart surgery, the apparatus comprising:
- a centrifugal pump having a housing, first and second pumping chambers, first and second inlets, first and second outlets, first and second impellers, and a shaft;
- a first pulmonary flow line for connection to the first inlet and a source of systemic venous blood;
- a second pulmonary flow line for connection to the first outlet and a pulmonary artery;
- a first systemic flow line for connection to the second inlet and a source of oxygenated blood;
- and
- a second systemic flow line for connection to the second outlet and a systemic artery.
A pumping apparatus for pumping liquids to a load, the apparatus comprising:
- a centrifugal pump containing first and second chambers positioned such that the first chamber is on top of the second chamber, an opening between the first and second chambers with a shaft extending from the first chamber through the opening and into the second chamber, a first impeller within the first chamber and connected to the shaft, a second impeller within the second chamber and connected to the shaft, a first inlet and first outlet in communication with the first chamber, a second inlet and second outlet in communication with the second chamber, flow lines coupling each inlet and outlet with the load;
- and
- a pump drive motor magnetically coupled to the second impeller to provide a source of rotation.
A centrifugal pump for pumping biological fluids, adapted to be coupled to an external source of rotation, comprising:
- a first chamber, having a first inlet and first outlet, for pumping fluids through a pulmonary circuit of a patient;
- a second chamber, having a second inlet and second outlet, for pumping fluids through a systemic circuit of a patient, the second chamber being fluidly coupled to the first chamber;
- a shaft which extends through and is enclosed by the first and second chambers for rotation about an axis of rotation;
- a first impeller enclosed in the first chamber and being supported on the shaft;
- a second impeller enclosed in the second chamber and being supported on the shaft in a spaced relationship to the external source of rotation, the second impeller coupled with the external source of rotation for rotating the impeller about the axis of rotation;
- and
- wherein the first impeller rotates about the axis of rotation by way of the rotation of the second impeller.
Dependencies are inferred from the claim text.