Patent ID: 7749444

Claim:
A system for distributing a reagent in a channel formed on a chip of a microfluidic device to perform a test on the reagent, the system comprising: the microfluidic device including: a fill port formed on the chip to inject the reagent into at least one of the channels; one or more test portions for performing a test on the reagent injected into the channel; and a micropump capable of transporting a liquid in forward and backward directions in one end portion of the channel, wherein an inside of the micropump and a vicinity of the channel connecting to an inlet and an outlet of the micropump are filled with a drive solution that is only one kind of a liquid driven by the micropump and that has physical properties different from physical properties of the reagent, a gas is sealed between the reagent and the drive solution in the channel to prevent the reagent from contacting the drive solution directly, and the micropump directly drives the drive solution in the forward and backward directions, so that the reagent is repeatedly moved to the test portions through the gas in an indirect manner or is repeatedly passed through the test portions through the gas in an indirect manner.