نتایج جستجو برای: flow pump
تعداد نتایج: 537446 فیلتر نتایج به سال:
One of the most important components in hydraulic circuits is the pump that generates hydraulic power supply. The performance and the versatility of a variable displacement piston pump are, to a large extent, determined by its controller. Upgrading of existing controllers is considered one of the major means of improving the characteristics of the pump. The dynamic performance of hydraulic syst...
BACKGROUND Contemporary ventricular assist device therapy results in a high rate of successful heart transplantation but is associated with bleeding, infections, and other complications. Further reductions in pump size, centrifugal design, and intrapericardial positioning may reduce complications and improve outcomes. METHODS AND RESULTS We studied a small, intrapericardially positioned, cont...
An ion-exchange-resin-based microfluidic pump is introduced that utilizes trace amounts of ions to generate fluid flows. We show experimentally that our pump operates in almost deionized water for periods exceeding 24 h and induces fluid flows of μm s-1 over hundreds of μm. This flow displays a far-field, power-law decay which is characteristic of two-dimensional (2D) flow when the system is st...
A 61-year-old woman who underwent HeartMate II left ventricular assist device placement for non-ischemic cardiomyopathy developed elevated lactate dehydrogenase within two weeks after implantation. After eight months of observation and several hospital admissions during which there was no evidence of pump thrombosis, she presented with clinically manifest hemolysis. During pump exchange there w...
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