Magnetic levitation centrifugal pump
Inventors
Ghelli, Nicola • Fontanili, Paolo • Costa Maianti, Edgardo
Assignees
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Publication Number
US-11644043-B2
Publication Date
2023-05-09
Expiration Date
Abstract
A magnetic levitation centrifugal pump, comprises: one hollow body provided with at least one inlet connector and with at least one outlet connector for blood; one rotor element, housed inside the hollow body and comprising at least one magnetic portion, where the rotor element can be commanded in rotation about an axis of rotation, without contact, by a stator element associable with the hollow body, the rotor element comprising at least one revolving body, which defines an upper surface supporting a plurality of blades which are adapted to convey blood towards the outlet connector; where the upper surface has a substantially concave shape and where the revolving body comprises at least one through hole which is positioned along the axis of rotation.
Core Innovation
A magnetic levitation centrifugal pump includes at least one hollow body with at least one inlet connector and at least one outlet connector for blood. At least one rotor element is housed inside the hollow body and comprises at least one magnetic portion, while the rotor element is commanded in rotation without contact by a stator element associable with the hollow body. The rotor element comprises at least one revolving body defining an upper surface supporting a plurality of blades adapted to convey blood toward the outlet connector.
The upper surface has a substantially concave shape and the revolving body comprises at least one through hole positioned along the axis of rotation. A curvilinear extension on the upper surface defines a saddle adapted to receive the blood entering the inlet connector. The hole has a first opening facing the upper surface and a joining profile with the first opening, and the hole has a second opening opposite the first opening which faces a bottom wall of the hollow body.
The blades have a coupling profile to the upper surface having a substantially curvilinear extension, and an upper profile opposite the coupling profile having a substantially rectilinear extension. The blades have a joining profile of the coupling profile to the upper profile, where the joining profile protrudes with respect to the overall dimensions of the revolving body and has a curvilinear extension. A rectilinear rear profile extending parallel to the rotation axis divides the flow between a through-hole path and an upper-wall path.
Claims Coverage
The independent claim covers a magnetic levitation centrifugal blood pump with a contactless stator-driven magnetic rotor inside a hollow body, including a specific blade-and-revolving-body geometry for guiding blood and promoting recirculation through a through hole. It includes 1 independent claim, with further blade-geometry refinements via dependent claims.
Magnetic levitation centrifugal pump with contactless hollow-body rotor
A magnetic levitation centrifugal pump comprising a hollow body with an inlet connector and an outlet connector for blood; and a rotor element housed inside the hollow body with a magnetic portion, the rotor element being commanded in rotation without contact by a stator element associable with the hollow body, the rotor element comprising a revolving body defining an upper surface supporting a plurality of blades adapted to convey blood toward the outlet connector.
Substantially concave upper surface and through hole along the axis
The revolving body has an upper surface with a substantially concave shape and comprises at least one through hole positioned along the axis of rotation, wherein the upper surface has a curvilinear extension to define a saddle adapted to receive blood entering the inlet connector.
Hole first and second openings with joining profile
The through hole has a first opening facing the upper surface, the upper surface has a joining profile with the first opening, and the hollow body has a bottom wall, while the through hole has a second opening opposite the first opening facing the bottom wall.
Blade coupling, upper, and protruding joining profiles with curvilinear extension
The plurality of blades have a coupling profile to the upper surface with a substantially curvilinear extension, blades have an upper profile opposite the coupling profile with a substantially rectilinear extension, and blades have a joining profile of the coupling profile to the upper profile that protrudes with respect to the overall dimensions of the revolving body and has a curvilinear extension.
Rear profile dividing flow between through-hole path and upper-wall path
A rear profile extending substantially parallel to the axis of rotation is configured to divide the incoming blood between the through-hole path and the upper-wall path, as further refined by the dependent claim set that specifies the rear profile geometry and arrangement.
Overall, the claim coverage is directed to the interaction between a contactless magnetic levitation rotor and a revolving body whose substantially concave upper surface forms a curvilinear saddle, together with a through hole along the rotation axis and a blade set having coupling, upper, and joining profiles. Dependent refinements further specify a rear blade profile extending parallel to the axis and arranged to divide flow between the through-hole path and the upper-wall path.
Stated Advantages
Reduced blood damage.
Reduced air-bubble formation.
Documented Applications
Not explicitly described in patent.
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