Results 21 to 30 of about 43,390 (300)

Convective instability and transient growth in steady and pulsatile stenotic flows [PDF]

, 2008
We show that suitable initial disturbances to steady or long-period pulsatile flows in a straight tube with an axisymmetric 75%-occlusion stenosis can produce very large transient energy growths.
D. BARKLEY, H. M. BLACKBURN, Blackburn, H. M., Sherwin, Spencer J., Barkley, Dwight, S. J. SHERWIN   +5 more
core   +1 more source

The method to generate pulsatile circulatory fluid flow using microfluidics

MethodsX, 2021
Microfluidic chips provide versatile tools to mimic the biological effect of blood flow on pluripotent stem cells (PSC). This paper presents methods for the use of microfluidics to model embryonic circulation using differentiated PSC.
Jingjing Li, Osmond Lao, Robert E. Nordon   +2 more
doaj   +1 more source

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

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

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

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

Mid flow range pulsatile waveform patterns. [PDF]

, 2022
Visual representation of flow waveform pattern of mean flow in order from lowest to highest bulk volume rate simulated in mid flow rate range; fingertip blood flow by venous occlusion plethysmography (A), total pulsatile ocular blood flow by phase ...
Carolyn Harris (7972427), Ahmad Faryami (12536504), Adam Menkara (12536507), Daniel Viar (12536510)   +3 more
core   +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