HOW THE DONGLE WORKS
The diagnostic test takes a small blood sample by pricking a patient's finger. The sample is diluted and put in a disposable plastic cassette with the necessary testing agents. The medical worker then inserts the cassette into the dongle and presses on a squeezable rubber bulb on the dongle, which creates the necessary vacuum for the sample and agents to mix. The researchers were able to greatly lower the cost of the device by using a rubber bulb in place of a mechanical vacuum pump.
Image credit: Tassaneewan Laksanasopin