Validation and application of a microfluidic ektacytometer (RheoScan-D) in measuring erythrocyte deformability

Sehyun Shin, J. X. Hou, J. S. Suh, M. Singh

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

The deformability of erythrocytes primarily depends on the composition of the membrane and cytoplasm, which consist of hemoglobin and other constituents. Current techniques that measure erythrocyte deformability often require labor-intensive and time-consuming measurement processes. This article describes a newly developed microfluidic ektacytometer (RheoScan-D) that adopts advanced microfluidic rheometry and conventional laser-diffraction technique to determine the deformability of erythrocytes. Experiments are carried out to measure changes in deformability by treating erythrocytes in chemical agents with various concentrations (0, 0.3, 0.5 and 1.0 mM) of hydrogen peroxide, glutaraldehyde and diamide, and also by incubating erythrocytes at 49°C for various time intervals (0, 5, 10 and 30 min), which affect the deformability through interaction with various constituents of erythrocytes. The measured Elongation Index (EI) of normal erythrocytes, a parameter directly related to erythrocyte deformability, at various shear stresses is in excellent agreement with those measured by a conventional ektacytometer (LORCA). The present technique is sensitive in detecting changes as produced by various chemical agents and high temperature. Alterations produced by hydrogen peroxide are the minimum and the maximums are produced by diamide treatment.

Original languageEnglish
Pages (from-to)319-328
Number of pages10
JournalClinical Hemorheology and Microcirculation
Volume37
Issue number4
Publication statusPublished - 2007 Oct 16

Fingerprint

Erythrocyte Deformability
Microfluidics
Diamide
Hydrogen Peroxide
Erythrocytes
Erythrocyte Indices
Glutaral
Cytoplasm
Hemoglobins
Lasers
Temperature
Membranes

Keywords

  • Deformability
  • Ektacytometer
  • Erythrocyte
  • Hardening
  • Microfluidics

ASJC Scopus subject areas

  • Physiology
  • Hematology

Cite this

Validation and application of a microfluidic ektacytometer (RheoScan-D) in measuring erythrocyte deformability. / Shin, Sehyun; Hou, J. X.; Suh, J. S.; Singh, M.

In: Clinical Hemorheology and Microcirculation, Vol. 37, No. 4, 16.10.2007, p. 319-328.

Research output: Contribution to journalArticle

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