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Updated: May 13, 2026

Amplitude-Modulated Electrodeformation to Evaluate Mechanical Fatigue of Biological Cells
09:45

Amplitude-Modulated Electrodeformation to Evaluate Mechanical Fatigue of Biological Cells

Published on: October 13, 2023

Red blood cell mechanical stability test.

Oguz K Baskurt1, Herbert J Meiselman

  • 1Koç University School of Medicine, Istanbul, Turkey.

Clinical Hemorheology and Microcirculation
|March 1, 2013
PubMed
Summary
This summary is machine-generated.

Sub-hemolytic shear stress (SS) damages red blood cells (RBC), reducing their mechanical stability and deformability. An ektacytometer can measure this cellular damage, crucial for testing biomedical devices.

Keywords:
Erythrocyte mechanical stabilityartificial organsektacytometryhemolyic thresholdleft ventricular assist device

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Area of Science:

  • Biomedical Engineering
  • Hematology
  • Mechanical Engineering

Background:

  • Red blood cells (RBC) experience varying shear stress (SS) in circulation.
  • Extreme SS, such as in extracorporeal circulation, can damage RBCs.
  • This damage can lead to hemolysis or altered mechanical properties, reducing RBC resilience.

Purpose of the Study:

  • To model and assess sub-hemolytic mechanical stress on RBCs.
  • To evaluate the utility of an ektacytometer for measuring RBC damage.
  • To determine the impact of sub-hemolytic SS on RBC mechanical stability and deformability.

Main Methods:

  • Utilized a Couette shearing system to apply SS at 100 Pa for 300 seconds.
  • Assessed RBC damage using diffraction pattern analysis via an ektacytometer.
  • Monitored ellipse area during increasing SS to determine hemolytic threshold and RBC deformability.

Main Results:

  • Sub-hemolytic SS significantly reduced RBC mechanical stability, lowering the hemolytic threshold from ~250 Pa to ~150 Pa.
  • SS-elongation index curves showed impaired RBC deformability after mechanical stress.
  • The ektacytometer effectively quantified cellular damage and changes in RBC properties.

Conclusions:

  • Sub-hemolytic mechanical stress impairs RBC mechanical stability and deformability.
  • A Couette-type ektacytometer is a valuable tool for assessing sub-hemolytic RBC damage.
  • This method can aid in evaluating the hemocompatibility of biomedical equipment.