Comparison of three commercially available ektacytometers with different shearing geometries

Oguz K. Baskurt, M. R. Hardeman, Mehmet Uyuklu, Pinar Ulker, Melike Cengiz, Norbert Nemeth, Sehyun Shin, Tamas Alexy, Herbert J. Meiselman

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

In December 2008, the International Society for Clinical Hemorheology organized a workshop to evaluate and compare three ektacytometer instruments for measuring deformability of red blood cells (RBC): LORCA (Laser-assisted Optical Rotational Cell Analyzer, RR Mechatronics, Hoorn, The Netherlands), Rheodyn SSD (Myrenne GmbH, Roetgen, Germany) and RheoScan-D (RheoMeditech, Seoul, Korea). Intra-assay reproducibility and biological variation were determined using normal RBC, and cells with reduced deformability (i.e., 0.001-0.02% glutaradehyde (GA), 48°C heat treatment) were employed as either the only RBC present or as a sub-population. Standardized difference values were used as measure of the power to detect differences between normal and treated cells. Salient results include: (1) All instruments had intra-assay variations below 5% for shear stress (SS)>1 Pa but a sharp increase was found for Rheodyn SSD and RheoScan-D at lower SS; (2) Biological variation was similar and markedly increased for SS<3-5 Pa; (3) All instruments detected GA-treated RBC with maximal power at 1-3 Pa, the presence of 10% or 40% GA-modified cells, and the effects of heat treatment. It is concluded that the LORCA, Rheodyn SSD and RheoScan-D all have acceptable precision and power for detecting reduced RBC deformability due to GA treatment or heat treatment, and that the SS range selected for the measurement of deformability is an important determinant of an instrument's power.

Original languageEnglish
Pages (from-to)251-264
Number of pages14
JournalBiorheology
Volume46
Issue number3
DOIs
Publication statusPublished - 2009 Aug 19

Fingerprint

Silver Sulfadiazine
Erythrocytes
Hot Temperature
Korea
Biological Assay
Netherlands
Germany
Lasers
Education
Population

Keywords

  • Ektacytometry
  • Erythrocyte deformability

ASJC Scopus subject areas

  • Physiology (medical)
  • Physiology

Cite this

Baskurt, O. K., Hardeman, M. R., Uyuklu, M., Ulker, P., Cengiz, M., Nemeth, N., ... Meiselman, H. J. (2009). Comparison of three commercially available ektacytometers with different shearing geometries. Biorheology, 46(3), 251-264. https://doi.org/10.3233/BIR-2009-0536

Comparison of three commercially available ektacytometers with different shearing geometries. / Baskurt, Oguz K.; Hardeman, M. R.; Uyuklu, Mehmet; Ulker, Pinar; Cengiz, Melike; Nemeth, Norbert; Shin, Sehyun; Alexy, Tamas; Meiselman, Herbert J.

In: Biorheology, Vol. 46, No. 3, 19.08.2009, p. 251-264.

Research output: Contribution to journalArticle

Baskurt, OK, Hardeman, MR, Uyuklu, M, Ulker, P, Cengiz, M, Nemeth, N, Shin, S, Alexy, T & Meiselman, HJ 2009, 'Comparison of three commercially available ektacytometers with different shearing geometries', Biorheology, vol. 46, no. 3, pp. 251-264. https://doi.org/10.3233/BIR-2009-0536
Baskurt OK, Hardeman MR, Uyuklu M, Ulker P, Cengiz M, Nemeth N et al. Comparison of three commercially available ektacytometers with different shearing geometries. Biorheology. 2009 Aug 19;46(3):251-264. https://doi.org/10.3233/BIR-2009-0536
Baskurt, Oguz K. ; Hardeman, M. R. ; Uyuklu, Mehmet ; Ulker, Pinar ; Cengiz, Melike ; Nemeth, Norbert ; Shin, Sehyun ; Alexy, Tamas ; Meiselman, Herbert J. / Comparison of three commercially available ektacytometers with different shearing geometries. In: Biorheology. 2009 ; Vol. 46, No. 3. pp. 251-264.
@article{5d1c119332694791af1dc892f160f706,
title = "Comparison of three commercially available ektacytometers with different shearing geometries",
abstract = "In December 2008, the International Society for Clinical Hemorheology organized a workshop to evaluate and compare three ektacytometer instruments for measuring deformability of red blood cells (RBC): LORCA (Laser-assisted Optical Rotational Cell Analyzer, RR Mechatronics, Hoorn, The Netherlands), Rheodyn SSD (Myrenne GmbH, Roetgen, Germany) and RheoScan-D (RheoMeditech, Seoul, Korea). Intra-assay reproducibility and biological variation were determined using normal RBC, and cells with reduced deformability (i.e., 0.001-0.02{\%} glutaradehyde (GA), 48°C heat treatment) were employed as either the only RBC present or as a sub-population. Standardized difference values were used as measure of the power to detect differences between normal and treated cells. Salient results include: (1) All instruments had intra-assay variations below 5{\%} for shear stress (SS)>1 Pa but a sharp increase was found for Rheodyn SSD and RheoScan-D at lower SS; (2) Biological variation was similar and markedly increased for SS<3-5 Pa; (3) All instruments detected GA-treated RBC with maximal power at 1-3 Pa, the presence of 10{\%} or 40{\%} GA-modified cells, and the effects of heat treatment. It is concluded that the LORCA, Rheodyn SSD and RheoScan-D all have acceptable precision and power for detecting reduced RBC deformability due to GA treatment or heat treatment, and that the SS range selected for the measurement of deformability is an important determinant of an instrument's power.",
keywords = "Ektacytometry, Erythrocyte deformability",
author = "Baskurt, {Oguz K.} and Hardeman, {M. R.} and Mehmet Uyuklu and Pinar Ulker and Melike Cengiz and Norbert Nemeth and Sehyun Shin and Tamas Alexy and Meiselman, {Herbert J.}",
year = "2009",
month = "8",
day = "19",
doi = "10.3233/BIR-2009-0536",
language = "English",
volume = "46",
pages = "251--264",
journal = "Biorheology",
issn = "0006-355X",
publisher = "IOS Press",
number = "3",

}

TY - JOUR

T1 - Comparison of three commercially available ektacytometers with different shearing geometries

AU - Baskurt, Oguz K.

AU - Hardeman, M. R.

AU - Uyuklu, Mehmet

AU - Ulker, Pinar

AU - Cengiz, Melike

AU - Nemeth, Norbert

AU - Shin, Sehyun

AU - Alexy, Tamas

AU - Meiselman, Herbert J.

PY - 2009/8/19

Y1 - 2009/8/19

N2 - In December 2008, the International Society for Clinical Hemorheology organized a workshop to evaluate and compare three ektacytometer instruments for measuring deformability of red blood cells (RBC): LORCA (Laser-assisted Optical Rotational Cell Analyzer, RR Mechatronics, Hoorn, The Netherlands), Rheodyn SSD (Myrenne GmbH, Roetgen, Germany) and RheoScan-D (RheoMeditech, Seoul, Korea). Intra-assay reproducibility and biological variation were determined using normal RBC, and cells with reduced deformability (i.e., 0.001-0.02% glutaradehyde (GA), 48°C heat treatment) were employed as either the only RBC present or as a sub-population. Standardized difference values were used as measure of the power to detect differences between normal and treated cells. Salient results include: (1) All instruments had intra-assay variations below 5% for shear stress (SS)>1 Pa but a sharp increase was found for Rheodyn SSD and RheoScan-D at lower SS; (2) Biological variation was similar and markedly increased for SS<3-5 Pa; (3) All instruments detected GA-treated RBC with maximal power at 1-3 Pa, the presence of 10% or 40% GA-modified cells, and the effects of heat treatment. It is concluded that the LORCA, Rheodyn SSD and RheoScan-D all have acceptable precision and power for detecting reduced RBC deformability due to GA treatment or heat treatment, and that the SS range selected for the measurement of deformability is an important determinant of an instrument's power.

AB - In December 2008, the International Society for Clinical Hemorheology organized a workshop to evaluate and compare three ektacytometer instruments for measuring deformability of red blood cells (RBC): LORCA (Laser-assisted Optical Rotational Cell Analyzer, RR Mechatronics, Hoorn, The Netherlands), Rheodyn SSD (Myrenne GmbH, Roetgen, Germany) and RheoScan-D (RheoMeditech, Seoul, Korea). Intra-assay reproducibility and biological variation were determined using normal RBC, and cells with reduced deformability (i.e., 0.001-0.02% glutaradehyde (GA), 48°C heat treatment) were employed as either the only RBC present or as a sub-population. Standardized difference values were used as measure of the power to detect differences between normal and treated cells. Salient results include: (1) All instruments had intra-assay variations below 5% for shear stress (SS)>1 Pa but a sharp increase was found for Rheodyn SSD and RheoScan-D at lower SS; (2) Biological variation was similar and markedly increased for SS<3-5 Pa; (3) All instruments detected GA-treated RBC with maximal power at 1-3 Pa, the presence of 10% or 40% GA-modified cells, and the effects of heat treatment. It is concluded that the LORCA, Rheodyn SSD and RheoScan-D all have acceptable precision and power for detecting reduced RBC deformability due to GA treatment or heat treatment, and that the SS range selected for the measurement of deformability is an important determinant of an instrument's power.

KW - Ektacytometry

KW - Erythrocyte deformability

UR - http://www.scopus.com/inward/record.url?scp=68649126581&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=68649126581&partnerID=8YFLogxK

U2 - 10.3233/BIR-2009-0536

DO - 10.3233/BIR-2009-0536

M3 - Article

VL - 46

SP - 251

EP - 264

JO - Biorheology

JF - Biorheology

SN - 0006-355X

IS - 3

ER -