Following the Beat: Imaging the Valveless Pumping Function in the Early Embryonic Heart [PDF]
Journal of Cardiovascular Development and Disease, 2022 In vertebrates, the coordinated beat of the early heart tube drives cardiogenesis and supports embryonic growth. How the heart pumps at this valveless stage marks a fascinating problem that is of vital significance for understanding cardiac development ...
Shang Wang, Irina V Larina
exaly +4 more sources
Kinking and Torsion Can Significantly Improve the Efficiency of Valveless Pumping in Periodically Compressed Tubular Conduits. Implications for Understanding of the Form-Function Relationship of Embryonic Heart Tubes [PDF]
Journal of Cardiovascular Development and Disease, 2017 Valveless pumping phenomena (peristalsis, Liebau-effect) can generate unidirectional fluid flow in periodically compressed tubular conduits. Early embryonic hearts are tubular conduits acting as valveless pumps.
Jörg Männer
exaly +4 more sources
Building Valveless Impedance Pumps From Biological Components: Progress and Challenges [PDF]
Frontiers in Physiology, 2022 Valveless pumping based on Liebau mechanism entails asymmetrical positioning of the compression site relative to the attachment sites of the pump’s elastic segment to the rest of the circuit.
Narine A Sarvazyan
exaly +4 more sources
Design and Analysis of a Cardioid Flow Tube Valveless Piezoelectric Pump for Medical Applications [PDF]
Sensors, 2023 Piezoelectric pumps play an important role in modern medical technology. To improve the flow rate of valveless piezoelectric pumps with flow tube structures and promote the miniaturization and integration of their designs, a cardioid flow tube valveless ...
Jialong Wang +8 more
doaj +2 more sources
Experimental study of an asymmetric valveless pump to elucidate insights into strategies for pediatric extravascular flow augmentation [PDF]
Scientific Reports, 2022 Asymmetric pumping is a sub-category of valveless pumping in which a flexible tube is rhythmically compressed in the transverse symmetry plane. Due to the resulting asymmetry between the suction and discharge pipes, a net pumping head is achieved ...
J. Anatol +8 more
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Output of a valveless Liebau pump with biologically relevant vessel properties and compression frequencies [PDF]
Scientific Reports, 2021 Liebau pump is a tubular, non-peristaltic, pulsatile pump capable of creating unidirectional flow in the absence of valves. It requires asymmetrical positioning of the pincher relative to the attachment sites of its elastic segment to the rest of the ...
Rubina Davtyan, Narine A. Sarvazyan
doaj +2 more sources
Flexible Electrohydrodynamic Fluid-Driven Valveless Water Pump via Immiscible Interface [PDF]
Cyborg and Bionic SystemsThe conventional electrohydrodynamic (EHD) pump is limited to pumping functional and dielectric liquids, which restricts its applications in fields like microfluidics, food safety, and materials production. In this study, we present a flexible water pump
Zebing Mao, Naoki Hosoya, Shingo Maeda
doaj +2 more sources
The Functional Significance of Cardiac Looping: Comparative Embryology, Anatomy, and Physiology of the Looped Design of Vertebrate Hearts [PDF]
Journal of Cardiovascular Development and DiseaseThe flow path of vertebrate hearts has a looped configuration characterized by curved (sigmoid) and twisted (chiral) components. The looped heart design is phylogenetically conserved among vertebrates and is thought to represent a significant determinant
Jörg Männer
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Biomath, 2017 We explore an embryonic heart model that couples electrophysiology and muscle-force generation to flow induced using a $2D$ fluid-structure interaction framework based on the immersed boundary method.
Nicholas Anthony Battista +1 more
exaly +3 more sources
Positive Periodic Solution for Pipe/Tank Flow Configurations with Friction
Mathematics, 2023 In this article, we study a periodic boundary value problem related to valveless pumping. The valveless pumping is described by the unidirectional flow of liquid in a system.
Haiqing Du, Xiaojing Wang, Bo Du
doaj +1 more source