Open AccessDesign and Computational Evaluation of a Pediatric MagLev Rotary Blood Pump
Author(s) -
Landon H Tompkins,
Barry Gellman,
Gino Morello,
Steven R Prina,
Thomas J. Roussel,
Jonathan A. Kopechek,
Priscilla C Petit,
Mark S. Slaughter,
Steven C. Koenig,
Kurt A. Dasse
Publication year - 2020
Publication title -
asaio journal
Language(s) - English
Resource type - Journals
eISSN - 1538-943X
pISSN - 1058-2916
DOI - 10.1097/mat.0000000000001323
Subject(s) - impeller , computational fluid dynamics , rotational speed , axial flow pump , mechanical engineering , computer science , materials science , engineering , mechanics , hydraulic pump , physics , reciprocating pump
Pediatric heart failure (HF) patients have been a historically underserved population for mechanical circulatory support (MCS) therapy. To address this clinical need, we are developing a low cost, universal magnetically levitated extracorporeal system with interchangeable pump heads for pediatric support. Two impeller and pump designs (pump V1 and V2) for the pediatric pump were developed using dimensional analysis techniques and classic pump theory based on defined performance criteria (generated flow, pressure, and impeller diameter). The designs were virtually constructed using computer-aided design (CAD) software and 3D flow and pressure features were analyzed using computational fluid dynamics (CFD) analysis. Simulated pump designs (V1, V2) were operated at higher rotational speeds (~5,000 revolutions per minute [RPM]) than initially estimated (4,255 RPM) to achieve the desired operational point (3.5 L/min flow at 150 mm Hg). Pump V2 outperformed V1 by generating approximately 30% higher pressures at all simulated rotational speeds and at 5% lower priming volume. Simulated hydrodynamic performance (achieved flow and pressure, hydraulic efficiency) of our pediatric pump design, featuring reduced impeller size and priming volume, compares favorably to current commercially available MCS devices.