A compact integrated microfluidic oxygenator with high gas exchange efficiency and compatibility for long-lasting...

Area of Science:

• Biomedical Engineering
• Microfluidics
• Cardiovascular Devices

Background:

• Microfluidic devices are crucial for advanced medical applications.
• Ensuring hemocompatibility and long-term cell viability is vital for blood-contacting devices.

Purpose of the Study:

• To develop and test a novel microfluidic device for efficient blood oxygenation.
• To enhance hemocompatibility through sustainable endothelialization of blood microcapillaries.

Main Methods:

• Designed a microfluidic device with parallel trilayer stacking and curved blood capillaries for maximal surface area.
• Developed and patented a novel "wet bonding" process using soft microprinting for large-scale sealing.
• Optimized blood channel height for reduced pressure drop and enhanced gas exchange.

Main Results:

• Achieved sustainable endothelialization of blood microcapillaries, maintaining cell viability for up to 2 weeks.
• Demonstrated high oxygen uptake and carbon dioxide release at a 4-inch wafer scale.
• Validated high blood flow rates up to 80 ml min⁻¹ in stacked devices.

Conclusions:

• The novel microfluidic device offers superior blood oxygenation and hemocompatibility.
• The developed "wet bonding" process enables scalable manufacturing of these devices.
• This technology holds significant promise for clinical applications requiring efficient blood gas exchange.