Results 261 to 270 of about 137,921 (304)

Basic Performance of a Miniature Intraventricular Axial Pump

Artificial Organs, 1996
Abstract: A miniature intraventricular axial pump for left ventricular (LV) support is under development. This pump was designed for placement in the LV cavity by insertion through the LV apex with the outlet located at the ascending aorta via the aortic valve. The basic hydro‐dynamic characteristics represented as a relationship between pump head (H)
M, Umezu, Y, Ohtake, K, Sakata, T, Fujimoto, K, Yamazaki, H, Koyanagi, H, Iiyama, T, Mori, K, Higuchi   +8 more
openaire   +3 more sources

Improving the efficiency of axial pumps

Russian Engineering Research, 2012
Improvement in the efficiency of axial pumps by reducing the hydraulic losses in the channels between the pump blades is considered. Specifically, the pressure and velocity head are redistributed in the gaps between the rims.
V. Yu. Aleksandrov, K. K. Klimovskii
openaire   +1 more source

Axial Type Self‐Bearing Motor for Axial Flow Blood Pump

Artificial Organs, 2003
Abstract: An axial self‐bearing motor is proposed which can drive an axial blood pump without physical contact. It is a functional combination of the bi‐directional disc motor and the axial active magnetic bearing, where it actively controls single degree‐of‐freedom motion, while other motions such as lateral vibration are passively stable.
Yohji, Okada, Toru, Masuzawa, Ken-Ichi, Matsuda, Kunihiro, Ohmori, Takashi, Yamane, Yoshiaki, Konishi, Shinya, Fukahori, Satoshi, Ueno, Seung-Jong, Kim   +8 more
openaire   +2 more sources

Axial Flow Catheter Pump for Circulatory Support

Biomedizinische Technik/Biomedical Engineering, 2002
The development of a percutaneously insertable catheter pump for temporary left ventricular and circulatory support in patients with acute ischemic cardiomyopathy.The expandable axial flow pump (introduction diameter 9-F, expanded diameter 6.5 mm) is mounted at the tip of a catheter, designed to be placed in aortic transvalvular position.
T, Schmitz-Rode, J G, Pfeffer, S, Graf, F, Buss, C, Brücker, T, Siess, R W, Günther   +6 more
openaire   +2 more sources

CONE FLOW AND AXIAL FLOW PUMPS

1993
This chapter describes cone flow and axial flow pumps. For low heads up to about 40 m per stage and for type numbers above about 3000, cone flow and axial flow pumps may be used. In general, these pumps have vertical spindles and are arranged to draw water directly from a well or sump, for example, mixed flow pump.
openaire   +1 more source

Advanced Suction Detection for an Axial Flow Pump

Artificial Organs, 2006
Abstract:  An automatic detection system for ventricular collapse was developed and tested in a first clinical trial as part of a physiological speed control concept for axial flow pumps. From this clinical experience, and based on the acquired data during this trial, an optimization of the developed system was performed.
Michael, Vollkron, Heinrich, Schima, Leopold, Huber, Robert, Benkowski, Gino, Morello, Georg, Wieselthaler   +5 more
openaire   +2 more sources

The valvo-pump. An axial, nonpulsatile blood pump.

ASAIO transactions, 1992
The valvo-pump, an axial, nonpulsatile blood pump implanted at the heart valve position while preserving diseased heart muscle, has several advantages over an artificial heart replacement, including 1) a good anatomic fit to the natural heart, 2) less blood contacting surface, and 3) ease of implantation.
Y, Mitamura, R, Yozu, T, Tanaka, K, Yamazaki   +3 more
openaire   +1 more source

Development of an Axial Flow Blood Pump LVAS

ASAIO Journal, 1992
Nimbus, Inc., (Rancho Cordova, CA) and the University of Pittsburgh (Pittsburgh, PA) are collaborating to develop an implantable rotary blood pump that can be used as a left ventricular assist system (LVAS). The short-term goal of this project is to show that an LVAS based on this pump can operate safely and reliably during chronic implantations in ...
K C, Butler, T R, Maher, H S, Borovetz, R L, Kormos, J F, Antaki, M, Kameneva, B P, Griffith, T, Zerbe, F D, Schaffer   +8 more
openaire   +2 more sources

Slipper Balance in Axial Piston Pumps and Motors

Journal of Tribology, 1992
The paper presents the results of an experimental and theoretical investigation of the effect of clamping ratio and orifice size on the performance of slippers in axial piston pumps and motors. Polishing of the running face to a slightly convex form appears to be essential for successful operation under all conditions. It is shown that slippers operate
Koc E., Hooke C.J., Li K.Y.
openaire   +1 more source

Damping on the swash plate of an axial-piston pump

Proceedings of the 2000 American Control Conference. ACC (IEEE Cat. No.00CH36334), 2000
An, open loop, reduced order model is proposed for the swash plate dynamics of an axial piston pump. The difference from previous reduced order models is the modeling of a damping mechanism not reported previously in the literature. An analytical expression for the damping mechanism is derived. The proposed reduced order model is validated by comparing
Xiaoping Zhang, J. Cho, Satish S. Nair, Noah D. Manring   +3 more
openaire   +1 more source