Evaluation of Lung Function in an Ex vivo Murine Model

Respiratory mechanics are a key area of study in defining and treating lung pathologies by assessing functional lung capacity. Lung mechanics can be evaluated through various lung maneuvers that involve different oscillatory waveforms. When applied to the lungs, these maneuvers measure multiple variables, such as pressure, volume, and flow, based on the response to the waveforms. These signals are then computed and analyzed to determine parameters such as hysterisivity, resistance, compliance, tissue damping, and tissue elastance, providing a detailed assessment of overall lung function. The analysis of respiratory mechanics is particularly important in evaluating donor lungs for lung transplantation. The present protocol is the first of its kind, offering a comprehensive and reproducible stepwise method for assessing respiratory mechanics using an ex vivo murine model. It includes details on the selected animal model, lung recovery, storage and preservation, and experimentation using a forced oscillation technique-based system. Additionally, it outlines data analysis, clinical significance, and the applications of the forced oscillation technique in studying an ex vivo model.