Deformability-based circulating tumor cell separation with conical-shaped microfilters: Concept, optimization, and...

Area of Science:

• Biomedical Engineering
• Cancer Research
• Microfluidics

Background:

• Circulating tumor cell (CTC) separation is crucial for early cancer detection and treatment.
• Deformability-based microfilters offer a simple, low-cost approach to CTC separation.
• Existing research primarily relies on experimental work, lacking fundamental design guidelines.

Purpose of the Study:

• To numerically investigate conical-shaped microfilters for CTC separation based on cell deformability.
• To develop design guidelines for improved CTC separation devices through fundamental understanding.

Main Methods:

• Utilized numerical simulations with a liquid drop model to simulate CTC passage through conical microfilters.
• Validated the model's pressure signature prediction against experimental data.
• Performed detailed pressure-deformability analysis to understand CTC behavior during filtration.

Main Results:

• Established a validated model for predicting CTC filtration behavior.
• Analyzed system throughput and unclogging characteristics, defining a 'pressure ratio' for clog resistance.
• Investigated the impact of conical angle and applied pressure on CTC separation efficiency and system performance.

Conclusions:

• Numerical simulation provides essential insights into CTC separation mechanisms in microfilters.
• The study offers a foundation for designing more efficient and reliable CTC separation devices.
• Understanding cell deformability and filter geometry is key to optimizing CTC capture and device performance.