Results 121 to 130 of about 18,474 (162)
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An Approach to Reducing Hemolysis in an Axial-Flow Blood Pump
ASAIO Journal, 1995In an attempt to decrease hemolysis caused by an axial-flow blood pump, we studied whether specific speed (Ns) at a design point (determined by flow in m3/min, pump head in m, and pump speeds in rpm), should be kept within the existing engineering standard range (1000 < Ns < 2500) or whether pump speed should be reduced to a minimum (Ns < 1000).
Hirofumi Anai +10 more
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In Vitro Performance of the Baylor/NASA Axial Flow Pump
Artificial Organs, 1993Abstract: A cooperative effort between Baylor College of Medicine and NASA/Johnson Space Center is under way to develop an implantable axial flow left ventricular assist device (LVAD). The pump is intended as an assist device for either pulmonary or systemic circulatory support for more than 3 months' duration.
G, Damm +9 more
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Induction of Ventricular Collapse by an Axial Flow Blood Pump
ASAIO Journal, 1998An important consideration for clinical application of rotary blood pump based ventricular assist is the avoidance of ventricular collapse due to excessive operating speed. Because healthy animals do not typically demonstrate this phenomenon, it is difficult to evaluate control algorithms for avoiding suction in vivo.
D V, Amin +5 more
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NPSHr Optimization of Axial-Flow Pumps
Journal of Fluids Engineering, 2008The two-step method for optimizing net positive suction head required (NPSHr) of axial-flow pumps is proposed in this paper. First, the NPSHr at the impeller tip is optimized with impeller diameter based on experimental data of 2D cascades in available wind tunnels.
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Relationship Between Pump Speed Design and Hemolysis in an Axial Flow Blood Pump
Artificial Organs, 1996AbstractIn an attempt to reduce the hemolysis caused by axial flow blood pumps, we investigated whether the specific speed should be kept within the standard engineering range or whether pump speed should be minimized, thus making the specific speed beyond the standard range.
Hirofumi, Anai +5 more
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On a new axial flow molecular pump
Journal of Scientific Instruments, 1965The theory of highly rarefied cascade flow has been presented and a proposal for a new axial flow (or radial flow) molecular pump (or compressor) in the free-molecule range has been made. An unconventional cascade has been suggested which will produce an extremely high compression ratio (up to 30 000) in a single stage at very high blade speed (S = Vc/(
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Development of an Intracardiac Axial Flow Pump
2000The intracardiac axial flow pump implanted at the heart valve position, with preservation of the diseased heart muscle, has several advantages over artificial heart replacement: good anatomical fitting to the natural heart, less blood contacting surface, and easy implantation technique.
Yoshinori Mitamura +4 more
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A Hydraulic Design Procedure of Axial-Flow Pump
Volume 1A: Symposia, Part 2, 2015A radical decrease of the product development time has been achieved by implementation of simulation driven development on axial-flow pump design. A new automatic hydraulic design procedure of axial-flow pumps was developed. It consists of in-house developed parametric design template, Visual Basic macro, OpenFOAM and an in-house developed pump ...
Zhenhua Shen +3 more
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Axial-flow polymer bridge pump with hydrodynamic bearings
Journal of Artificial OrgansA portable axial-flow polymer bridge pump with hydrodynamic bearings has been developed for bridge-to-bridge use. The pump is inexpensive to manufacture and disposable. It weighs 185 g and was verified to have a lifetime of 3 months with silent operation.
Takashi, Yamane +4 more
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