Label-Free Particle Accumulation in Helical Microtubes with Secondary Flows.

Summary: Scientists have created a clever new 3D spiral tube to help sort tiny, rare things in our blood, like stem cells and immune cells. By spinning the fluid through these tiny curly tubes, they can separate the cells naturally, without needing to use special chemical tags. They watched how different cells move inside the tubes and discovered five special movement patterns. They also learned that stiff particles and squishy cells behave differently based on how fast the fluid is moving. This new tool could make it much easier and cheaper to separate important cells for medical tests and life-saving treatments!