Design and Numerical Evaluation of an Axial Partial-assist Blood Pump for Chinese and other Heart Failure Patients

• DOI: 10.5301/ijao.5000616
• Publication Date: 2017-08-04T11:16:36Z
• Authors: Guang-Mao Liu; Dong-Hai Jin; Jian-Ye Zhou; Xi-Hang Jiang; Han-Song Sun; Yan Zhang; Hai-Bo Chen; Sheng-Shou Hu; Xing-Min Gui
• Keywords: Pressure head; Diffuser (optics); Splitter

A fully implantable axial left ventricular assist device LAP31 was developed for Chinese or other heart failure patients who need partial support. Based on the 5-Lpm total cardiac blood output of without disease, design point set to a flow rate 3 Lpm with 100-mmHg pressure head. To achieve required head and good hemolytic performance, structure that includes spindly rotor hub diffuser splitter cantilevered main blades developed. Computational fluid dynamics (CFD) used analyze hydraulic hemodynamic performance LAP31. Then in vitro hydraulics experiments were conducted. The numerical simulation results show could generate 1 8 60.9 182.7 mmHg when pump rotating between 9,000 12,000 rpm. average scalar shear stress 21.7 Pa, exposure time 71.0 milliseconds. mean hemolysis index obtained using Heuser's model Giersiepen's 0.220% 3.89 × 10-5% respectively. After adding blades, separation at suction surface reduced. cantilever reduced tangential velocity from 6.1 4.7-1.4 m/s within blade gap by changing shroud hub. Subsequently, damage caused In conclusion, characteristics are acceptable