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Updated: May 17, 2026
09:12
Measuring Deformability and Red Cell Heterogeneity in Blood by Ektacytometry
Published on: January 12, 2018
Comparative osmotic gradient ektacytometry data on inter-species differences of experimental animals
Norbert Nemeth1, Ferenc Kiss1, Zoltan Klarik1
1Department of Operative Techniques and Surgical Research, Institute of Surgery, Medical and Health Science Center, University of Debrecen, Debrecen, Hungary.
Clinical Hemorheology and Microcirculation
|October 19, 2012
Summary
Red blood cell deformability varies significantly between species. Osmotic gradient ektacytometry revealed distinct erythrocyte responses in mice, rats, dogs, and pigs, highlighting inter-species differences in micro-rheological properties.
Area of Science:
- Hematology
- Biophysics
- Comparative Physiology
Background:
- Red blood cell (erythrocyte) deformability is crucial for microcirculation.
- Deformability is influenced by intracellular viscosity, membrane properties, morphology, and surface-area-to-volume ratio.
- Erythrocyte volume is sensitive to micro-environmental osmolarity, a phenomenon measurable by osmotic gradient ektacytometry (osmoscan).
Purpose of the Study:
- To address the lack of comparative osmoscan data in laboratory animal species.
- To investigate and compare the erythrocyte micro-rheological properties across different species using osmoscan.
- To establish baseline osmoscan data for mouse, rat, canine, and porcine blood.
Main Methods:
- Utilized osmotic gradient ektacytometry (osmoscan) with a LoRRca MaxSis instrument.
- Analyzed blood samples from four species: mouse, rat, canine, and porcine.
- Measured erythrocyte elongation index (EI) as a function of shear stress and osmolarity.
Main Results:
- Mouse erythrocytes exhibited the highest elongation index values, typically above 1 Pa shear stress.
- Rat and canine erythrocytes showed progressively lower EI values compared to mice.
- Porcine erythrocytes displayed the lowest EI values, generally above 3-5 Pa shear stress.
- Optimal osmolarity for maximal EI varied significantly, with canine showing the lowest, porcine and mouse the highest, and rat in between.
Conclusions:
- Significant inter-species differences exist in erythrocyte deformability and osmotic response.
- Osmotic gradient ektacytometry is a valuable tool for characterizing erythrocyte micro-rheological properties across species.
- Further comparative studies are needed to fully understand erythrocyte behavior and its implications.
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