Results 251 to 260 of about 73,555 (300)
Some of the next articles are maybe not open access.
Perfusion cooling by pulsatile flow
The Japanese Journal of Surgery, 1977Organ temperature changes and the temperature gradient between organs with cooling and rewarming were studied in rabbits using pulsatile flow perfusion. The temperature gradient between organs was within 3 degrees C. At the initial stage of cooling and rewarming, organ temperatures changed rapidly.
openaire +2 more sources
2019
Flow solutions in the presence of pulsation (e.g. from the heart) are developed. Bessel functions are introduced as an aside. The concepts of shocks and solitary waves (solitons) are then discussed as examples of nonlinear effects. The strategy for dealing with intrinsic nonlinearity is described in terms of mode coupling and the Korteweg–de Vries (KdV)
openaire +1 more source
Flow solutions in the presence of pulsation (e.g. from the heart) are developed. Bessel functions are introduced as an aside. The concepts of shocks and solitary waves (solitons) are then discussed as examples of nonlinear effects. The strategy for dealing with intrinsic nonlinearity is described in terms of mode coupling and the Korteweg–de Vries (KdV)
openaire +1 more source
Apparent stresses in disturbed pulsatile flows
Journal of Biomechanics, 1988Traditional attempts at decomposing measured velocities into repeatable and random components are examined for a set of velocity data measured under pulsatile flow conditions distal to a 90% axisymmetric constriction. The Reynolds numbers, which are typical of those found in the human carotid artery, are such that transitional phenomena occur during ...
B B, Lieber, D P, Giddens
openaire +2 more sources
PULSATILE BLOOD-FLOW IN ARTERIAL GRAFTS
The Lancet, 1976The distensibility of arterial wall is an important factor in the haemodynamics of pulsatile blood-flow. Autogenous-vein grafts have a dynamic response to the arterial pressure pulse (compliance) which approaches that of normal arterial wall, whereas synthetic prostheses are generally incompliant, or become so shortly after implantation.
R N, Baird, W M, Abbott
openaire +2 more sources
2018
Earlier left ventricular assist devices (LVADs) were volume displacement pumps (VDPs) that delivered pulsatile flow. However, due to improved survival rates of rotary blood pumps (RBPs), they are now the preferred device. Originally, RBPs operated at a constant speed and therefore delivered flow continuously with an absent or diminished pulse. Although
Wu, Eric L +2 more
openaire +2 more sources
Earlier left ventricular assist devices (LVADs) were volume displacement pumps (VDPs) that delivered pulsatile flow. However, due to improved survival rates of rotary blood pumps (RBPs), they are now the preferred device. Originally, RBPs operated at a constant speed and therefore delivered flow continuously with an absent or diminished pulse. Although
Wu, Eric L +2 more
openaire +2 more sources
1969
Recent interest in the hydrodynamic events relating to biomedical problems of the arteries as well as the development of artificial heart-assist devices have prompted one to study the nature of pulsatile flows in arteries. In particular, the problem of atherosclerosis is suspected to be related to the shearing stress developed over the vascular wall ...
S. C. Ling, H. B. Atabek, J. J. Carmody
openaire +1 more source
Recent interest in the hydrodynamic events relating to biomedical problems of the arteries as well as the development of artificial heart-assist devices have prompted one to study the nature of pulsatile flows in arteries. In particular, the problem of atherosclerosis is suspected to be related to the shearing stress developed over the vascular wall ...
S. C. Ling, H. B. Atabek, J. J. Carmody
openaire +1 more source
Impact of Pulsatile Flow on Microcirculation
ASAIO Journal, 2004Baba and associates 1 have investigated the effects of pulsatile and nonpulsatile flow using a total artificial heart on the microcirculation of the bulbar conjunctiva in a goat model. They have clearly documented that erythrocyte velocity and the number of perfused capillaries were significantly higher with pulsatile flow when compared with ...
Akif, Undar +2 more
openaire +2 more sources
Dynamics of Pulsatile Blood Flow III
2015Solutions of fluid flow problems, to fully determine the dynamics of the fluid, including a mapping of the velocity field and of the relation between the prevailing pressure and flow fields, are possible only in the most simply constructed cases and mostly in the physical sciences.
openaire +1 more source
Flow velocity measurements for pulsatile flow
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 1988The inherent sensitivity of magnetic resonance imaging to motion makes it particularly well-suited as a noninvasive flow measurement modality. A pulse sequence which labels moving material by subjecting it to a pulse that inverts the longitudinal magnetization is discussed.
openaire +1 more source