Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Utku Gülan"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-12 (2024)
Abstract The hemodynamics in the aorta as well as the durability of aortic valve prostheses vary greatly between different types of devices. Although placement and sizing of surgical aortic valve prostheses are excellent, the valve geometry of common
Externí odkaz:
https://doaj.org/article/d1f78b79401149969fe095c4763eb7ae
Autor:
Utku Gülan, Valentina A. Rossi, Alexander Gotschy, Ardan M. Saguner, Robert Manka, Corinna B. Brunckhorst, Firat Duru, Christian M. Schmied, David Niederseer
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-7 (2022)
Abstract The pathophysiological mechanisms underlying the development of the athlete’s heart are still poorly understood. To characterize the intracavitary blood flows in the right ventricle (RV) and right-ventricular outflow tract (RVOT) in 2 heal
Externí odkaz:
https://doaj.org/article/0de6d7a831414cda98e6857b169e2253
Publikováno v:
IEEE Transactions on Biomedical Engineering, 68 (3)
Objective: The flow downstream from aortic stenoses is characterised by the onset of shear-induced turbulence that leads to irreversible pressure losses. These extra losses represent an increased resistance that impacts cardiac efficiency. A novel ap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d47001f757afe38045cb468cf0b5e646
https://doi.org/10.1109/tbme.2020.3018173
https://doi.org/10.1109/tbme.2020.3018173
Publikováno v:
Sensors, Vol 19, Iss 5, p 1229 (2019)
Advancements in optical imaging devices and computer vision algorithms allow the exploration of novel diagnostic techniques for use within engineering systems. A recent field of application lies in the adoption of such devices for non-contact vibrati
Externí odkaz:
https://doaj.org/article/2197b973a57a4ece99635fd3e5e91804
Publikováno v:
JACC. Case reports. 4(5)
Blood flow and shear stresses were quantified using 4-dimensional flow cardiac magnetic resonance and 3-dimensional particle velocimetry before and after transcatheter aortic valve replacement (TAVR). TAVR reduced turbulent kinetic energy by 47% and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b09f25ea71704e7fa06fff5079e39dbf
https://pubmed.ncbi.nlm.nih.gov/35257111
https://pubmed.ncbi.nlm.nih.gov/35257111
Autor:
Utku Gülan, Lena Wiegmann, Marianne Schmid Daners, Christian Loosli, Bente Thamsen, Vartan Kurtcuoglu, Markus Holzner, Mirko Meboldt
Flow fields in rotary blood pumps (RBPs) have a significant influence on hemocompatibility. Because flow characteristics vary with flow rate, different operating conditions play a role. Furthermore, turbulence is crucial in the evaluation of blood da
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::934a785b414ce1972f77a44c337e59df
https://doi.org/10.5167/uzh-175878
https://doi.org/10.5167/uzh-175878
Autor:
Markus Holzner, Utku Gülan
Publikováno v:
Medical Engineering & Physics. 60:61-69
We investigate three-dimensional pulsatile aortic flow in the ascending aorta with mechanical prosthetic aortic valve implanted at two different orientations under physiological flow conditions using an anatomically accurate aorta. We perform 3D Part
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58383c04115b143f28ce6264078ce91e
https://doi.org/10.1016/j.medengphy.2018.07.013
https://doi.org/10.1016/j.medengphy.2018.07.013
Publikováno v:
Journal of Biomechanics. 76:152-159
An aortic aneurysm is defined as a balloon-shaped bulging of all three histologic components of the aortic vessel walls (intima, media and adventitia). This dilation results from vessel weakening owing to remodeling, i.e. due to cystic degeneration o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c250ba611485101a63738fca3cd7ff0
https://doi.org/10.1016/j.jbiomech.2018.05.033
https://doi.org/10.1016/j.jbiomech.2018.05.033
Autor:
Steven Wang, Jianguo Zhao, Utku Gülan, Chao Yang, Naoto Ohmura, Jun Han, Jie Kong, Takafumi Horie, Ben Bin Xu
Biological Liquid Crystal, a rich set of soft materials with rod-like structures widely existed in nature, possess typical lyotropic liquid crystalline phase properties both in vitro (e.g. cellulose, peptides and protein assemblies), and in vivo (e.g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e812586674bc4b66038ab0f3a80fe95
Publikováno v:
Annals of Biomedical Engineering, 47 (11)
We investigate the flow past two transcatheter aortic valves (TAVs) and one severely calcified valve in an anatomically realistic aorta geometry to evaluate the ability of the TAVs to establish a healthier aortic flow compared to a diseased case. Vel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a95ad9535ae1749fba11bf3b3efc180
https://pubmed.ncbi.nlm.nih.gov/31111327
https://pubmed.ncbi.nlm.nih.gov/31111327