These driving forces determine how samples and reagents travel through the enclosed channel network. Pressure can propel fluids, capillary action can guide movement without the same type of applied force, and external control can regulate flow when coordinated handling is needed. Selecting among these mechanisms helps direct fluids through mixing, separation, and reaction zones in the intended sequence.
Each zone performs a distinct fluid-handling or analytical role within the cassette. Mixing brings samples and reagents into contact, separation helps manage different components, and reaction zones support the biological analysis itself. Keeping these functions in defined regions allows the device to coordinate processing in a compact format while using very small sample volumes.
The enclosed format helps limit contamination during biological processing and supports more consistent handling of samples and reagents. It also allows fluid movement and analytical steps to remain within a controlled miniature network rather than requiring separate open transfers. These characteristics can reduce reagent use while supporting automation, portability, and reproducibility across workflows.
A typical workflow places the biological sample and required reagents into the cassette, then directs their movement through the enclosed channels using pressure, capillary action, or external control. The fluids pass through selected mixing, separation, or reaction regions, where processing occurs. The resulting analysis can then support applications such as nucleic acid testing, immunoassays, or cell handling.
Microfluidic cassettes support several distinct biological workflows, including cell handling, nucleic acid analysis, immunoassays, and rapid diagnostic testing. Their integrated fluid paths can coordinate sample and reagent contact for these uses while limiting reagent consumption. This range makes the format relevant to both research workflows and development of compact analytical systems.
Their compact, often disposable format supports portability and can simplify biological analysis outside a large laboratory setting. Enclosed fluid handling may reduce contamination, while integrated channels and chambers can improve automation and consistency. These features are particularly relevant to point-of-care testing, where rapid diagnostic analysis and efficient use of small sample and reagent volumes are important.