Results 21 to 30 of about 43,354 (300)

Investigation of physiological pulsatile flow in a model arterial stenosis using large-eddy and direct numerical simulations [PDF]

, 2012
Physiologicalpulsatileflow in a 3D model of arterialstenosis is investigated by using largeeddysimulation (LES) technique. The computational domain chosen is a simple channel with a biological type stenosis formed eccentrically on the top wall.
Molla, M.M., M.C. Paul, M.M. Molla, Paul, M.C.   +3 more
core   +1 more source

Non-pulsatile blood flow is associated with enhanced cerebrovascular carbon dioxide reactivity and an attenuated relationship between cerebral blood flow and regional brain oxygenation

Critical Care, 2019
Background Systemic blood flow in patients on extracorporeal assist devices is frequently not or only minimally pulsatile. Loss of pulsatile brain perfusion, however, has been implicated in neurological complications.
Cecilia Maria Veraar, Harald Rinösl, Karina Kühn, Keso Skhirtladze-Dworschak, Alessia Felli, Mohamed Mouhieddine, Johannes Menger, Ekaterina Pataraia, Hendrik Jan Ankersmit, Martin Dworschak   +9 more
doaj   +1 more source

The effects of pulsatile versus nonpulsatile flow on cerebral pulsatility index, mean flow velocity at the middle cerebral artery, regional cerebral oxygen saturation, cerebral gaseous microemboli counts, and short-term clinical outcomes in patients undergoing congenital heart surgeryCentral MessagePerspective

JTCVS Open, 2023
Objective: The objective of this retrospective review was to evaluate whether or not pulsatile flow improves cerebral hemodynamics and clinical outcomes in pediatric congenital cardiac surgery patients.
Krishna Patel, BS, Yongwook Dan, MD, Allen R. Kunselman, MA, Joseph B. Clark, MD, John L. Myers, MD, Akif Ündar, PhD   +5 more
doaj   +1 more source

Easy Pulsatile Phantom for Teaching and Validation of Flow Measurements in Ultrasound

Ultrasound International Open, 2016
Purpose: To build a simple model to teach and validate non-pulsatile and pulsatile flow quantification in ultrasound. Materials and Methods: The setting consists of the following connected components: (1) medical syringe pump producing an adjustable ...
M. B. Rominger, E.-M. Müller-Stuler, M. Pinto, A. S. Becker, K. Martini, T. Frauenfelder, V. Klingmüller   +6 more
doaj   +1 more source

Geometrically Reduced Modelling of Pulsatile Flow in Perivascular Networks

Frontiers in Physics, 2022
Flow of cerebrospinal fluid in perivascular spaces is a key mechanism underlying brain transport and clearance. In this paper, we present a mathematical and numerical formalism for reduced models of pulsatile viscous fluid flow in networks of generalized
Cécile Daversin-Catty , Ingeborg G. Gjerde , Marie E. Rognes , Marie E. Rognes    +3 more
doaj   +1 more source

Non-Newtonian and flow pulsatility effects in simulation models of a stented intracranial aneurysm [PDF]

, 2011
Permission to redistribute provided by publishers.Three models of different stent designs implanted in a cerebral aneurysm, originating from the Virtual Intracranial Stenting Challenge'07, are meshed and the flow characteristics simulated using ...
BAROZZI, Giovanni Sebastiano, Barozzi, GS, Atherton, M. A., Collins, M. W., M Cavazzuti, Cavazzuti, M, M A Atherton, M W Collins, G S Barozzi, CAVAZZUTI, Marco, Collins, MW, Atherton, MA   +11 more
core   +1 more source

Precise position control of a helical magnetic robot in pulsatile flow using the rotating frequency of the external magnetic field

AIP Advances, 2017
We propose a position control method for a helical magnetic robot (HMR) that uses the rotating frequency of the external rotating magnetic field (ERMF) to minimize the position fluctuation of the HMR caused by pulsatile flow in human blood vessels.
Jongyul Kim, Jaekwang Nam, Wonseo Lee, Bongjun Jang, Gunhee Jang   +4 more
doaj   +1 more source

Linear tubular switched reluctance motor for heart assistance circulatory: Analytical and finite element modeling [PDF]

, 2011
A linear tubular switched reluctance motor is presented. This actuator is devoted to be used as a left ventricular assist device (LVAD). In order to avoid thrombosis, this actuator includes pump and valve functions. By using a St. Jude Medical mechanical
Leprince, Pascal, Martinez, Nicolas, N. Martinez, Llibre, Jean-François, B. Nogarede, P. Leprince, J-F. Llibre, Leprince, P., Nogarède, Bertrand, Martinez, N.   +9 more
core   +1 more source

The Dynamics of Pulsatile Blood Flow [PDF]

Circulation Research, 1954
The theory of dynamic fluid motion involving the forces manifested by mass, acceleration, viscous friction and vessel wall tension have been considered and studied when arterial blood flow and pressure are pulsatile. These studies and considerations have resulted in the conclusion that arterial blood pressure is dependent upon all of these parameters ...
openaire   +2 more sources

Investigation of spiral blood flow in a model of arterial stenosis [PDF]

, 2009
The spiral component of blood flow has both beneficial and detrimental effects in human circulatory system [Stonebridge PA, Brophy CM. Spiral laminar flow in arteries? Lancet 1991; 338: 1360–1].
Paul, M.C., Larman, A.
core   +1 more source