Key result
Exposure to variable shear gradients (peak wall shears 3700-29,000 s-1) dramatically changed platelet thrombi formation compared to constant base shear alone, rendering platelets hyperthrombotic.
Why the study?
To investigate platelet thrombus formation dynamics within flow conditions consisting of either constant or variable shear.
Population
Human platelets in anticoagulated whole blood from healthy donors
Comparison
Variable shear gradients in stenotic microchannels vs constant shear in straight channels
Design
Ex vivo microfluidic experimental study
Authors
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Pulsatile flow effects on platelets are hypothesis-generating; leaves open relevance to clinical thrombosis or device management.
Blood flow shear gradients significantly enhance platelet thrombus formation compared to constant shear, highlighting the importance of pulsatile flow in thrombosis and providing a novel platform for antiplatelet testing.
Lui et al. (2019) studied Thrombus formation. Variable shear gradients vs. Constant base shear was evaluated on Platelet thrombi total volume, average volume, and surface coverage. Exposure to variable shear gradients (peak wall shears 3700-29,000 s-1) dramatically changed platelet thrombi formation compared to constant base shear alone, rendering platelets hyperthrombotic.
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