This paper provides an illustrated description of a proposed LiBr-H2O vapour absorption refrigerator which uses a thermally activated solution pumping mechanism that combines controlled variations in generator vapour pressure with changes it produces in static-head pressure difference to circulate the absorbent solution between the generator and absorber vessels. The proposed system is differen...

Large deformability of erythrocytes in microvasculature is a prerequisite to realize smooth circulation. We develop a novel tool for the three-step "Catch-Load-Launch" manipulation of a human erythrocyte based on an ultra-high speed position control by a microfluidic "robotic pump". Quantification of the erythrocyte shape recovery as a function of loading time uncovered the critical time window...

The haemodynamics of the anatomically undivided ventricle of the monitor lizard Varanus exanthematicus have been examined by measurements of blood pressure and flow. Central blood POi, PGOt and pH were also measured. Intracardiac pressure measurements show the ventricle to be functionally divided throughout systole into a high pressure pump (cavum arteriosum: 'mean' pressure 89 cm H2O) perfusin...

A viscous impeller pump (VIP) based on the Von Karman viscous pump is specifically designed to provide cavopulmonary assist in a univentricular Fontan circulation. The technology will make it possible to biventricularize the univentricular Fontan circulation. Ideally, it will reduce the number of surgeries required for Fontan conversion from three to one early in life, while simultaneously impr...

The Pulsatile Catheter (PUCA) pump is a trans-arterial pulsatile ventricular assist device that can be used for short-term left ventricular support. The separate inflow and outflow valves in the first version of the device (PUCA-I) were replaced by a single inflow/outflow valve in the latest PUCA pump version (PUCA-II). The new combined valve was tested during in vitro (mock circulation) and in...

This paper investigates 3D simulation of fluid flow in a centrifugal pump from the Detroit Diesel company to extract possible engine cooling trends.  The velocity and pressure profile of water, the coolant, is analyzed and the characteristic curves of the pump are derived. This provides a useful evaluation of the pump performance at all working conditions. For this aim, a computational fluid dy...

KEY POINTS • Shock is present when there is evidence of multisystem organ hypope fusion; it often presents as reduced mean blood pressure. • Initial resuscitation aims to establish an adequate airway, breathing, and circulation; a working diagnosis or clinical hypothesis of the cause of inadequate circulation should always be made immediately by physical examination and clinical presentation be...

The purpose of this investigation was to analyze how left ventricular assist device (LVAD) with a centrifugal pump alters left ventricular diastolic hemodynamics and energy by means of a left ventricular pressure volume relationship. Fifteen anesthetized normal pig hearts were studied after placement of an apical drainage LVAD with a centrifugal pump. Indices of the left ventricular isovolumic ...

OBJECTIVE To compare the perioperative incidence rates of hemolysis and inflammatory response in patients undergoing coronary artery bypass grafting with the two main types of cardiopulmonary bypass, centrifugal and roller pumps, and establish correlations among hemolytic and inflammatory changes. METHODS This was a prospective, randomized trial of 60 patients assigned to either roller pump (...

3 This paper examines the sensitivity of atmospheric pCO2 to changes in ocean biol4 ogy that result in drawdown of nutrients at the ocean surface. We show that the global 5 inventory of preformed nutrients is the key determinant of atmospheric pCO2 and the 6 oceanic carbon storage due to the soft tissue pump (OCSsoft). We develop a new the7 ory showing that under conditions of perfect equilibri...