Supplemental Videos

2 video files in AVI format.

Files in this Data Supplement:

• Video 1 - In the absence of PEEP, although air eventually entered and aerated the distal gas exchange regions of the lung, the lungs did not retain gas at end-expiration for at least the first 120 inflations.
• Video 2 - The lungs of pups ventilated with 5 cmH2O PEEP aerated rapidly, beginning in the large proximal airways and extending to the distal regions. Lung aeration increased with each inflation and air was retained in both the distal and larger conducting airways at end-expiration, with no evidence of lung collapse or liquid re-filling the airways.