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Low-Cost DIY Pump for Microfluidics Made from Balloons and Nylon Stockings

July 30th, 2019 Conn Hastings Diagnostics, News

A collaboration between researchers at RMIT University and the Walter and Eliza Hall Institute of Medical Research, both in Melbourne Australia, has resulted in an inexpensive and easily manufactured pressure pump. The simple device, which consists of a latex balloon and nylon stockings, can pump biological samples around microfluidic devices, and is much smaller and cheaper than larger lab-based alternatives. The researchers hope that the pump could make microfluidics-based healthcare applications, such as point-of-care diagnostics, more accessible around the world.   

Microfluidic devices have the potential to provide miniaturized diagnostic and analytical tools to clinicians that can be used instead of bulky and expensive laboratory equipment. Researchers are constantly working to make them less expensive and more suited for work in remote or low-resource regions.

“Parasitic micro-organisms have a major impact in impoverished communities in tropical and subtropical regions globally, but also in developed countries including Australia,” said Aaron Jex, a researcher involved in the study. “In order to address this there is an urgent need for field-based, low-cost diagnostic tools that work in challenging, sometimes remote and often complex environments very different from a pristine laboratory.”

Frequently, such devices require a pump to move samples around the microfluidic instrument. The Australian researchers turned to footballs for inspiration, as they can handle significant amounts of pressure thanks to their reinforced structure.

“We started with basic latex balloons, then realized that regular stockings made from nylon and elastane could be a perfect match to reinforce them, allowing them to hold significantly higher pressure and function as pumps,” said Peter Thurgood, another researcher involved in the study. “By simply wrapping three layers of stockings around the latex balloon we were able to increase its internal pressure by a factor of 10 – enough to run many water or blood analyses that would usually require large, expensive pumps.”

The device costs as little as $2 and can run microfluidic instruments for several hours with no significant pressure loss. To date, the researchers have successfully tested the device as a component of a microfluidic setup designed to detect cancer cells in liquid samples.

See a video about the device below:

Study in Lab on a Chip: Self-sufficient, low-cost microfluidic pumps utilising reinforced balloons

Via: RMIT University

Conn Hastings

Conn Hastings received a PhD from the Royal College of Surgeons in Ireland for his work in drug delivery, investigating the potential of injectable hydrogels to deliver cells, drugs and nanoparticles in the treatment of cancer and cardiovascular diseases. After achieving his PhD and completing a year of postdoctoral research, Conn pursued a career in academic publishing, before becoming a full-time science writer and editor, combining his experience within the biomedical sciences with his passion for written communication.

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