Abstract
Development of controlled vacuum is having many applications in the realm of biotechnology, cell transfer, gene therapy, biomedical engineering and other engineering activities involving separation or chemical reactions. Here we show the controlled vacuum generation through a biocompatible, energy efficient, low-cost and flexible miniature device. We have designed and fabricated microfluidic devices from polydimethylsiloxane which are capable of producing vacuum at a highly controlled rate by using water as a motive fluid. Scrupulous removal of infected fluid/body fluid from the internal hemorrhage affected parts during surgical operations, gene manipulation, cell sorting, and other biomedical activities require complete isolation of the delicate cells or tissues adjacent to the targeted location. We demonstrate the potential of the miniature device to obtain controlled evacuation without the use of highly pressurized motive fluids. Water has been used as a motive liquid to eject vapor and liquid at ambient conditions through the microfluidic devices prepared using a low-cost fabrication method. The proposed miniature device may find applications in vacuum generation especially where the controlled rate of evacuation, and limited vacuum generation are of utmost importance in order to precisely protect the cells in the nearby region of the targeted evacuated area.
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Acknowledgments
Authors are thankful to Sardar Vallabhbhai National Institute of Technology - Surat for providing infrastructure and support through Institute Research Grant.
Authors’ contribution
V.N.L. conceived and designed the study, performed some experiments, gave conceptual advice and guidance, and supervised the work. S.R. performed many experiments. V.N.L. and S.R. analyzed data. V.N.L. interpreted the results, and wrote the manuscript.
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Lad, V.N., Ralekar, S. Controlled evacuation using the biocompatible and energy efficient microfluidic ejector. Biomed Microdevices 18, 96 (2016). https://doi.org/10.1007/s10544-016-0119-2
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DOI: https://doi.org/10.1007/s10544-016-0119-2