INDIANA UNIVERSITY RESEARCH AND TECHNOLOGY CORPORATION
发明人:
RODEFELD, Mark, D.
申请号：
USUS2012/067648
公开号：
WO2013/082621A1
申请日:
2012.12.03
申请国别(地区):
WO
年份:
2013
代理人:
摘要：
A bearingless and sealless rotary blood pump is disclosed which provides multidirectional flow intended to provide low-pressure, high-volume right-sided partial assist circulatory support in a univentricular Fontan circulation on a permanent basis. The pump includes a housing and an impeller suspended in the center of the housing. The housing incorporates flow optimization features between inlet and outlet ends, as well as with the impeller surface. Large fluid gaps maintained between impeller and housing eliminate any potential for blood flow obstruction. The impeller contains some motor components. It includes a central stator and surrounding rotor. The motor includes a brushless DC outrunner electrical motor design. An electromagnetic stator core is surrounded by a circumferential passive magnetic ring. The rotor is further levitated about the stator spindle by a plurality of axially and radially located passive magnetic and hydrodynamic journal bearings on both ends of the spindle. The rotor is bearingless and sealless. During impeller rotation, blood entering the space between the rotor and stator is induced to flow by centrifugal pumping action and the fluid film separates the stator hydrodynamic bearings from the rotor so that there is no direct mechanical contact between the rotor and stator.La présente invention concerne une pompe à sang rotative sans palier et sans joint détanchéité qui produit un flux multidirectionnel destiné à produire une assistance circulatoire partielle côté droit à basse pression et volume élevé dans une circulation de Fontan monoventriculaire de façon permanente. La pompe comprend un boîtier et un propulseur suspendu au centre du boîtier. Le boîtier incorpore des éléments doptimisation de flux entre les extrémités dentrée et de sortie, ainsi quavec la surface du propulseur. De grands écartements de fluide maintenus entre le propulseur et le boîtier éliminent tout risque dobstruction de circulation sanguine éventuelle. Le propulseur
