Results 221 to 230 of about 92,347 (259)

In Vitro Performance of the Baylor/NASA Axial Flow Pump

Artificial Organs, 1993
Abstract: 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, K, Mizuguchi, R, Bozeman, J, Akkerman, G, Aber, P, Svejkovsky, S, Takatani, Y, Nosé, G P, Noon, M E, DeBakey   +9 more
openaire   +2 more sources

Induction of Ventricular Collapse by an Axial Flow Blood Pump

ASAIO Journal, 1998
An 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, J F, Antaki, P, Litwak, D, Thomas, Z J, Wu, M, Watach   +5 more
openaire   +2 more sources

A Study of the Theory of Axial-Flow Pumps

Journal of Fluids Engineering, 1945
Abstract The essential aim of this paper is to present the theory of axial-flow pump runners in as simple a form as possible. The results are fairly conclusive in so far as the determination of the flow conditions in individual cylindrical stream surfaces is considered. In addition, it has been found possible to eliminate the controversy
openaire   +1 more source

Modeling of Recirculation in Axial Flow Pumps

1992
The object of this paper is to qualitatively point out the critical flow rate corresponding to recirculation in the axial pumps. This situation is reached when the global flow rate of the machine decreases from the nominal value Qm to a first critical value Qk corresponding to the cancellation of the flow rate at the hub.
R. Noguera, F. Massouh, R. Rey, S. Kouidri   +3 more
openaire   +1 more source

Relationship Between Pump Speed Design and Hemolysis in an Axial Flow Blood Pump

Artificial Organs, 1996
AbstractIn 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, Yoshinari, Wakisaka, Takeshi, Nakatani, Yoshiyuki, Taenaka, Hisateru, Takano, Tetsuo, Hadama   +5 more
openaire   +3 more sources

NPSHr Optimization of Axial-Flow Pumps

Journal of Fluids Engineering, 2008
The 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.
openaire   +1 more source

On a new axial flow molecular pump

Journal of Scientific Instruments, 1965
The 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/(
openaire   +1 more source

Development of an Intracardiac Axial Flow Pump

2000
The 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, Masayuki Fujiyoshi, Ryohei Yozu, Shiaki Kawada, Takashi Tanaka   +4 more
openaire   +1 more source

A Hydraulic Design Procedure of Axial-Flow Pump

Volume 1A: Symposia, Part 2, 2015
A 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, Svend Rasmussen, Xiaofen Ma, Christian Brix Jacobsen   +3 more
openaire   +1 more source

Modeling and identification of an axial flow blood pump

Proceedings of the 1997 American Control Conference (Cat. No.97CH36041), 1997
This paper presents a model for identification of an axial pump. It aims to provide flow and pressure difference estimates of the axial pump as well as the parameters of the pump characteristics without using flow and pressure sensors.
null Seongjin Choi, J.R. Boston, D. Thomas, J.F. Antaki   +3 more
openaire   +1 more source