Purge-free miniature rotary pump
AssigneeABIOMED, Inc.
InventorThorsten Siess
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for the circulation of blood using a purge-free miniature pump. In one embodiment, a pump is provided that may comprise a housing including a rotor and a stator within a drive unit. In this embodiment, the pump may establish a primary blood flow through the space between the drive unit and the housing and a secondary blood flow between the rotor and stator. In another embodiment, a pump establishes a primary blood flow outside the housing and a secondary blood flow between the rotor and stator. In yet another embodiment, a method is provided for introducing the pump into the body and circulating blood using the pump.
Claims12
1-13. (canceled)
A paracardial blood pump, comprising:
- a tubular housing including a longitudinally extending primary flow channel;
- a drive unit, comprising a rotor and a stator, arranged coaxially within the housing;
- an impeller positioned at one end of the drive unit and connected to the rotor;
- a pump ring with an axial inlet positioned at one end of the housing and surrounding at least a portion of the impeller;
- a cannula extending from an end of the housing nearest the impeller;
- a laterally branching outlet tube positioned proximate an end of the housing opposite the impeller;
- and
- an axial magnetic bearing positioned at one end of the housing.
An intravascular blood pump, comprising:
- a catheter-based housing;
- a drive unit;
- comprising a rotor and a stator;
- arranged coaxially within the housing;
- an impeller positioned at one end of the drive unit, the impeller connected to the rotor;
- and configured to create a primary blood flow;
- primary blood flow openings positioned in the housing downstream of the impeller to direct the primary blood flow out of the housing;
- and
- a secondary flow channel formed between the rotor and the stator and configured to direct blood through the drive unit in a direction generally opposite that of the primary blood flow.
Dependencies are inferred from the claim text.