The invention relates to a cfDNA extraction
system and method. The
system is provided with a rack, an index plate, a sample deep-hole plate, a
magnetic bead deep-hole plate, a rinsing deep-hole plate, an
elution deep-hole plate, a magnetic rod sleeve, a
reagent sample adding device, a center module, a
temperature control module and a control module. The extraction method comprises the steps of incubation, ice bath,
magnetic bead adsorption, combination of magnetic beads and cfDNA, rinsing and
elution. According to the cfDNA extraction
system and the extraction method provided by the invention, related parameters are set in the control module, and the control module controls the index plate of the cfDNA extraction system to cooperate with the center module to execute a magnetic bar sleeve fixing process and controls the index plate to cooperate with the
temperature control module to execute incubation and ice bath processes; the index plate is controlled to be matched with the center module to execute the procedures of
magnetic bead adsorption, magnetic bead and cfDNA combination, rinsing and
elution; the whole cfDNA extraction process does not need manual participation, has the advantages of high
automation degree, small personal error and high extraction efficiency, and can adapt to a high-precision and high-efficiency medical examination technology in the future.