Hydrostatic Pressure Pump and its use in Valving for Centrifugal Microfluidics
Researchers have developed a hydrostatic pressure pump for centrifugal microfluidic applications.
In centrifugal microfluidics, the hydrostatic pressure pump is generated natively during rotation. In the design, when fluid from a main reservoir is propelled by centrifugal forces through a microchannel, the liquid encounters a resistance. This in turn causes localized pressure shifts to be seen along the microchannel. The phenomenon can thus be utilized as a novel valving technique. By placing an axillary conduit at a critical level along the microchannel the pressure differences can be used to prime siphoning features from additional reservoirs. The valve is the first passive method that can withstand high frequency rotation and withhold liquids until directly needed.
This hydrostatic pump may be used in different valving applications in microfluidics. Additionally, new mixing and dilutions may be possible.
Hydrostatic pressure pumping enables expanded utilization of space on a disc. For the first time, passive valving that is RPM independent is achieved.
STATE OF DEVELOPMENT
A prototype has been developed. Theoretical derivations are ongoing.
* Patent Pending
Tech ID: 21275
Gorkin III, Robert A., Southard IV, William E.
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