New Approaches to Respiratory Assist: Bioengineering an Ambulatory, Miniaturized Bioartificial Lung

Area of Science:

• Biomedical Engineering
• Respiratory Medicine
• Critical Care

Background:

• Current treatments for respiratory failure improve survival but not quality of life.
• Conventional mechanical ventilation has limitations for acute and chronic lung conditions.
• There is a clinical need for advanced respiratory assist devices focusing on extracorporeal CO2 removal.

Purpose of the Study:

• To review novel concepts and prerequisites for bioartificial respiratory assist devices.
• To discuss requirements for safe intensive care and long-term domiciliary use.
• To explore advancements towards ambulatory artificial lungs.

Main Methods:

• Discussion of device miniaturization strategies.
• Review of surface modification techniques for blood-contacting surfaces (passivation).
• Exploration of endothelial cell seeding for biocompatibility.

Main Results:

• Pivotal steps identified for developing ambulatory artificial lungs.
• Focus on direct extracorporeal CO2 removal as a key function.
• Consideration of safety profiles for intensive care and home therapy.

Conclusions:

• Miniaturization, surface passivation, and cell seeding are crucial for long-term ambulatory artificial lungs.
• These advancements are necessary to improve quality of life for patients with chronic ventilatory failure.
• Risks and challenges associated with long-term use of miniaturized bioartificial lungs require further investigation.