Blood pump with improved leakage control
a blood pump and leakage control technology, applied in the field of blood pumps, can solve problems such as the deformation of pump components, and achieve the effect of improving the performance of certain pump components
Pending Publication Date: 2021-07-15
ABIOMED
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- Abstract
- Description
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- Application Information
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Benefits of technology
The patent describes a blood pump motor with a rotor and stator, and a method for making it. The rotor has blades and a drive unit, and the stator has a yoke, coil, and coil holding sleeve. The yoke, coil, and sleeve are treated with a primer before epoxy is introduced, and the blades are positioned at the end of the rotor. The technical effect is a pump motor that has a strong bond between the rotor and stator, and high efficiency in transmitting power.
Problems solved by technology
Therefore, due to the environment in which the pumps are configured to operate, the performance of certain pump components can degrade over time.
Method used
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[0029]Blood pumps are deployed in patients that require critical and life-saving care. Consequently, it is important to remediate any aspect of the device that might adversely affect pump operation. Leakage Current (LC) is one such failure mode.
[0030]One cause of leakage current is the moisture ingress into the pump stator / rotor assembly. Moisture ingress can occur at the interface between the epoxy and sleeve (such moisture ingress illustrated in FIG. 6A) and between the epoxy and the yoke (such moisture ingress illustrated in FIG. 6B). As noted above, the stator of such blood pumps have a coil 122 that is essentially embedded in epoxy. The epoxy encapsulates the coil and fills the cavity to form the stator body.
[0031]Suitable epoxies for assembling the stator described herein are well known to those skilled in the art and not described in detail herein. Examples of suitable epoxies are an amine base two-part epoxy such as Delo-Duopox, which is obtained from DELO Industrial Adhesiv...
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Abstract
A blood pump with a stator and rotor wherein the rotor is assembled by bonding the stator components with epoxy. The bonding surfaces of the rotor components are primed with a silane-based primer to improve adhesion between the primer and the rotor components by rendering such surfaces hydrophobic. A bonding surface of one of the stator yoke or the stator sleeve, or both, is treated with a primer that improves wettability of the bonding surface and improves bonding of the epoxy to the binding surface. The device has a bonding surface adhered to epoxy in which a primer was applied on such bonding surface prior to introducing epoxy onto the bonding surface. In addition to improved bond strength, hydrophobic surface would control moister ingress.
Description
CROSS REFERENCE TO RELATED APPLICATION[0001]The present application claims priority to U.S. Provisional Application No. 62 / 959,552 filed Jan. 10, 2020, the disclosure of which is incorporated by reference in its entirety.TECHNICAL FIELD[0002]This invention relates to a blood pump, in particular an intravascular blood pump, to support a blood flow in a patient's blood vessel.BACKGROUND[0003]Blood pumps of different types are known, such as axial blood pumps, centrifugal blood pumps, or mixed-type blood pumps, where the blood flow is caused by both axial and radial forces. Intravascular blood pumps are inserted into a patient's vessel such as the aorta by means of a catheter. A blood pump typically comprises a pump casing having a blood flow inlet and a blood flow outlet. In order to cause a blood flow from the blood flow inlet to the blood flow outlet, an impeller or rotor is rotatably supported with the pump casing about an axis of rotation, with the impeller being provided with on ...
Claims
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IPC IPC(8): A61M60/411A61M60/135A61M60/806A61M60/829F04D13/06F04D9/00
CPCA61M60/411A61M60/135A61M60/806A61M2207/00F04D13/06F04D9/00A61M60/829A61M60/422A61M60/13A61M60/221A61M60/90A61M2205/0238
Inventor DAS, SOUMENKONG, QINGCHAOTAO, ZHENGHONGSHIP, ALEXANDER
Owner ABIOMED