Increasingly heart failure patients need to use Ventricular Assist Devices (VADs) to keep themselves alive. During treatment, hemolysis is an inevitable complication of interventional devices. The most common method for evaluating mechanical hemolysis is to calculate Hemolysis Index (HI) by the power-law formula. However, the HI formula still has obvious flaws. With an intention of further understanding the phenomenon of mechanical hemolysis in non-physiological flow, our study developed a coarse-grained erythrocyte destruction model at the cellular scale and explored the mechanism of the single erythrocyte shear destruction utilizing the Dissipative Particle Dynamics, including the erythrocyte stretching destruction process and the erythrocyte non-physiological shearing destruction process. In the process of stretching and shearing, the high-strain distribution areas of erythrocytes are entirely different. The high-strain areas during stretching are concentrated on the central axis. After the stretch failure, the erythrocyte changes from fusiform to shriveled biconcave. In the shear breaking process, the high strain areas are focused on the erythrocyte edge, causing the red blood cells to evolve from an ellipsoid shape to a plate shape. In addition to the flow shear stress, the shear rate acceleration is also an important factor in the erythrocyte shear damage. The erythrocyte placed in low shear stress flow is still unstably destroyed under high shear rate acceleration. Consequently, the inclusion of flow-buffering structures in the design of VADs may improve non-physiological hemolysis.
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November 2022
Research Article|
November 01 2022
The erythrocyte destruction mechanism in non-physiological shear mechanical hemolysis
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Zhike Xu (胥智轲);
Zhike Xu (胥智轲)
(Conceptualization, Data curation, Investigation, Methodology, Writing – original draft)
1
Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University
, Beijing 100084, China
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Chenyang Wang (王晨阳);
Chenyang Wang (王晨阳)
(Investigation, Methodology, Writing – review & editing)
1
Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University
, Beijing 100084, China
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Sen Xue (薛森)
;
Sen Xue (薛森)
(Data curation, Methodology, Writing – review & editing)
1
Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University
, Beijing 100084, China
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Feng He (何枫);
Feng He (何枫)
(Methodology, Writing – review & editing)
1
Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University
, Beijing 100084, China
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Pengfei Hao (郝鹏飞)
;
Pengfei Hao (郝鹏飞)
(Writing – review & editing)
1
Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University
, Beijing 100084, China
2
Tsinghua University (School of Materials Science and Engineering)—AVIC Aerodynamics Research Institute Joint Research Center for Advanced Materials and Anti-Icing
, Beijing 100084, China
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Xiwen Zhang (张锡文)
Xiwen Zhang (张锡文)
a)
(Conceptualization, Formal analysis, Investigation, Methodology, Writing – review & editing)
1
Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University
, Beijing 100084, China
a)Author to whom correspondence should be addressed: [email protected]
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Zhike Xu (胥智轲)
1
Chenyang Wang (王晨阳)
1
Feng He (何枫)
1
Xiwen Zhang (张锡文)
1,a)
1
Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University
, Beijing 100084, China
2
Tsinghua University (School of Materials Science and Engineering)—AVIC Aerodynamics Research Institute Joint Research Center for Advanced Materials and Anti-Icing
, Beijing 100084, China
a)Author to whom correspondence should be addressed: [email protected]
Physics of Fluids 34, 111901 (2022)
Article history
Received:
July 22 2022
Accepted:
September 18 2022
Citation
Zhike Xu, Chenyang Wang, Sen Xue, Feng He, Pengfei Hao, Xiwen Zhang; The erythrocyte destruction mechanism in non-physiological shear mechanical hemolysis. Physics of Fluids 1 November 2022; 34 (11): 111901. https://doi.org/10.1063/5.0112967
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