Models of Surfactant Replacement Therapy in Neonatal Lungs

Area of Science:

• Pulmonary medicine
• Biomedical engineering
• Respiratory physiology

Background:

• The lungs' gas exchange relies on pulmonary mechanics and surfactant homeostasis.
• Surfactant replacement therapy (SRT) is crucial for neonatal respiratory distress syndrome (NRDS).
• Effective lung disease treatment requires understanding surfactant transport and drug delivery.

Purpose of the Study:

• To review the evolution of lung models for studying pulmonary mechanics and therapeutics transport.
• To highlight the contributions of various modeling approaches to respiratory research.
• To inform the development of improved lung disease treatments.

Main Methods:

• Review of computational fluid dynamics (CFD) simulations.
• Analysis of physical macroscale airway models.
• Examination of microfluidic lung-on-a-chip devices.
• Consideration of ex vivo animal lung models (e.g., rat lungs).

Main Results:

• Computational and benchtop models offer insights into fluid dynamics and therapeutic deposition.
• These models often lack the dynamic compliance and biomechanical properties of a real lung.
• Animal models are essential for validating findings under physiological conditions.

Conclusions:

• Integrating diverse lung models enhances understanding of pulmonary mechanics and drug delivery.
• Improved models can refine intratracheal drug delivery and aerosolized therapies.
• This integrated approach aids in developing more effective treatments for respiratory diseases like NRDS.