Red blood cell rheology using single controlled laser-induced cavitation bubbles
Pedro A Quinto-Su1, Claudia Kuss, Peter R Preiser
1Nanyang Technological University, School of Physical and Mathematical Sciences, Department of Physics and Applied Physics, Singapore. pedro.quinto@nucleares.unam.mx
Lab on a Chip
|December 25, 2010
Summary
We developed a laser-induced cavitation technique to measure red blood cell (RBC) deformability. This method quantifies RBC elastic properties, offering a new tool for disease diagnostics.
Area of Science:
- Biophysics
- Cell Biology
- Microfluidics
Background:
- Red blood cell (RBC) deformability is crucial for microcirculation and serves as a disease biomarker.
- Quantifying RBC mechanical properties is essential for understanding cellular function and pathology.
Purpose of the Study:
- To present a novel microfluidic technique for quantifying red blood cell deformability.
- To characterize the elastic properties of RBCs using laser-induced cavitation and high-speed imaging.
Main Methods:
- A microfluidic chamber was used to confine RBCs for imaging.
- Transient cavitation bubbles generated by a pulsed laser stretched RBCs.
- High-speed cameras recorded RBC shape recovery to analyze dynamic rheological properties.
Main Results:
- A power law relationship was observed in RBC shape recovery over tens of microseconds.
- Statistically significant differences in elastic properties were detected between untreated and treated RBC populations.
- Neuraminidase decreased RBC rigidity, while wheat germ agglutinin increased it, validating the method.
Conclusions:
- The cavitation-based technique accurately quantifies RBC elastic properties.
- This method offers a high-throughput, in situ approach for assessing cellular mechanics without pre-treatment.
- The technique has potential applications in disease screening and diagnostics.
