Abstract
Impella 2.5 (Abiomed Inc., Danvers, Ma.) is a percutaneous microaxial circulatory support pump that delivers up to 2.5 l/min of systemic flow augmentation by pumping directly from the left ventricle into the ascending aorta. This article describes the device including the insertion method, fundamental principles of action, and clinical results from the completed Protect I clinical trial as well as general use under FDA clearance.
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