Results 51 to 60 of about 43,390 (300)

Numerical analysis of coupled effects of pulsatile blood flow and thermal relaxation time during thermal therapy [PDF]

, 2012
The main purpose of this study is to investigate the coupled effects of the pulsatile blood flow in thermally significant blood vessels and the thermal relaxation time in living tissues on temperature distributions during thermal treatments.
Shih, Tzu-Ching; Horng, Tzyy-Leng, Huang, Huang-wen   +1 more
core   +1 more source

FEATURES OF LONG-TERM MECHANICAL CIRCULATORY SUPPORT WITH CONTINUOUS-FLOW PUMP

Вестник трансплантологии и искусственных органов, 2012
In a review of the comparative analysis of methods and tools for long-term mechanical circulatory support with continuous flow and pulsatile flow implantable pumps. Particular attention is paid to the choice of the optimal modes of the operation of pumps
G. P. Itkin, E. G. Shokhina, S. Y. Shemakin, V. N. Poptsov, D. V. Shumakov, S. V. Gautier   +5 more
doaj   +1 more source

Multifunctional Adhesive Hydrogel for Rapid Cardiac Hemostasis and Antibacterial Protection

Advanced Materials Technologies, EarlyView.
A multifunctional polyacrylamide/gelatin/tannic acid hydrogel (PGT) is presented for rapid cardiac hemostasis under wet, dynamic conditions. Surface tannic acid coating enables instantaneous wet adhesion, accelerates coagulation, and confers antibacterial activity within a single platform.
Seoha Kim, Kaeun Chae, Inseon Kim, Kye Il Joo, Chang Sup Kim, Seunghun S. Lee   +5 more
wiley   +1 more source

Shear Difference: Flow Type Dictates Endothelial Flow‐Responsive Gene Programs in a 3‐Dimensional–Printed In Vitro Model

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease
Background Endothelial cells are mechanosensitive and adopt distinct phenotypes in response to hemodynamic forces. These responses are difficult to study in conventional in vitro platforms, which rarely reproduce vessel‐scale geometry or clinically ...
Nasir A. Shah, Kerry‐Anne Rye, Zoltan H. Endre, Tracie J. Barber, Jonathan H. Erlich, Blake J. Cochran   +5 more
doaj   +1 more source

A General Scaling Law of Vascular Tree: Optimal Principle of Bifurcations in Pulsatile Flow [PDF]

Journal of Applied Fluid Mechanics
Murray’s law, as the best-known optimal relationship between bifurcation calibers, is obtained based on the assumption of steady-state Poiseuille blood flow and is mostly accurate in small vessels.
M. Shumal, M. Saghafian, E. Shirani, M. Nili-Ahmadabadi   +3 more
doaj   +1 more source

Magnetic Micro‐ and Nanorobots for Precision Thrombolysis: Design Strategies and Translational Challenges

Advanced Robotics Research, EarlyView.
Micro‐ and nanorobots for targeted thrombolysis. This perspective elaborates on the clinical indication of blood clot disorders and current limitations for treatment. As a novel, alternative solution, micro‐ and nanorobots can be used to treat and break down thrombi.
Joshua M. Mesfin, Yimo Yan, Nikola Cesarovic, Simone Schuerle   +3 more
wiley   +1 more source

Optimization of Magnetic Milli‐Spinner for Robotic Endovascular Intervention

Advanced Robotics Research, EarlyView.
This work presents the design optimization of a multifunctional magnetic milli‐spinner for high‐speed propulsion and efficient clot debulking. The optimized design achieves an ultrafast swimming velocity of 55 cm/s (≈175 body lengths/s) in saline water, enabling stable upstream swimming against strong physiological flows and establishing magnetic milli‐
Lu Lu, Luca Higgins, Jack Bernardo, Ruike Renee Zhao   +3 more
wiley   +1 more source

Turbulent puffs in transitional pulsatile pipe flow at moderate pulsation amplitudes [PDF]

We show that, in the transitional regime of pulsatile pipe flow, at moderate-to-high amplitudes 0.5≲≲1, the first long-lived turbulent structures are localized and take the form of the puffs and slugs observed in statistically steady pipe flow.
Avila, Marc, Morón, Daniel
core   +1 more source

Perivascular Matrix Densification Dysregulates Angiogenesis and Activates Pro‐Inflammatory Endothelial Cells

Advanced Science, EarlyView.
Perivascular matrix densification promotes the emergence of aberrant endothelial tip cells (ATECs) that invade and persist within fibrotic microenvironments. Using in vivo lineage tracing and a human microvessel model, this study shows that fibrous matrix cues destabilize VE‐cadherin–mediated junctions to gate TGF‐β signaling, inducing a pro ...
Jingyi Xia, William Y. Wang, Kyle A. Jacobs, Kairav Maniar, Daphne Lin, Evan H. Jarman, Daniel L. Matera, Kristen Loesel, Christopher D. Davidson, Harrison L. Hiraki, Xiaotian Tan, Eve H. Shikanov, Robert N. Kent, Carole Parent, Xudong Fan, Ariella Shikanov, Matthew L. Kutys, Brendon M. Baker   +17 more
wiley   +1 more source

Adaptive control of microrobot in pulsatile flow [PDF]

2014 IEEE Conference on Control Applications (CCA), 2014
We propose an observer-based adaptive controller for a magnetic microrobot navigating in blood vessels. The pulsatile blood flow nonlinearly affects the drag force which dominates the microrobot dynamics. Instead of using a priori knowledge of the blood flow, we synthesize a mean value theorem (MVT) based observer to on-line estimate the pulsatile ...
Sadelli, Lounis, Fruchard, Matthieu, Ferreira, Antoine   +2 more
openaire   +2 more sources