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In Vitro Microfluidic Disease Model to Study Whole Blood-Endothelial Interactions and Blood Clot Dynamics in Real-Time

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Optomagnetic Viscometry for Monitoring Nanoscale Blood Coagulation Dynamics In Vitro.

Qin Bi¹, Yulin Yang¹, Liyang Shi²

¹Department of Biomedical Engineering, Xiangya School of Basic Medical Sciences, Central South University, Changsha 410013, China.

Analytical Chemistry

|April 9, 2026

Summary

This summary is machine-generated.

This study introduces an optomagnetic nanorelaxometry platform for real-time nanoscale viscosity measurements. The novel method reveals complex viscosity changes during blood coagulation, offering new insights into physiological processes.

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Area of Science:

Biophysics
Nanotechnology
Biomedical Engineering

Background:

Accurate nanoscale viscosity measurement is crucial for understanding biological processes like blood coagulation.
Conventional bulk assays lack the resolution to capture dynamic, nanoscale viscosity changes.

Purpose of the Study:

To develop and validate an optomagnetic nanorelaxometry platform for real-time nanoscale viscosity analysis.
To investigate dynamic viscosity changes during biological processes, specifically blood coagulation.

Main Methods:

Utilized magnetic nanoparticles and Brownian relaxation dynamics to probe nanoscale viscosity.
Employed an optomagnetic nanorelaxometry platform requiring a small sample volume (50 μL).
Validated the platform using glycerol solutions, collagen gelation, and platelet-rich plasma coagulation.

Main Results:

The platform accurately quantified viscosity in glycerol solutions and tracked collagen gelation dynamics.
Observed a novel nonmonotonic viscosity profile during platelet-rich plasma coagulation, unresolvable by conventional methods.
Demonstrated practical utility through evaluation with anticoagulants and a thrombolytic agent.

Conclusions:

The optomagnetic nanorelaxometry platform provides real-time nanoscale viscosity measurements with high resolution.
The findings suggest new perspectives on coagulation mechanisms and the platform's potential for pharmacological screening and point-of-care monitoring.