Blood flow measurements in microfluidic devices fabricated by a micromilling technique

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In this work, Dr. Diana and fellow researchers propose a low cost technique able to produce microfluidic devices for biomedical applications. The most common technique to fabricate biomedical microdevices is soft-lithography. However, it is a costly and time-consuming technique. Progress in manufacturing milling tools smaller than 100 µm, has enabled the use of micromilling machines to fabricate microfluidic devices capable of performing cell separation.

The researchers show not only the ability of a micromilling machine to fabricate microchannels down to 30 µm but also the ability of the manufactured microfluidic device to perform partial separation of red blood cells from plasma. They have performed blood flow visualization and measurements of the cell-free layer thickness by using a high-speed video microscopy system and demonstrated the advantages and limitations of the described micromilling fabrication technique to produce microfluidic devices for cellular-scale flow studies.

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