External negative pressure improves lung aeration in near-term rabbit kittens at risk of developing respiratory distress.

Similarly, the percentage of tidal volume entering the LR lung region tended to be greater in kittens exposed to negative compared to positive external pressures, although this difference was not quite significant (33.4 ± 1.8 vs. 24.5 ± 2.9%; P = 0.060; Figure 3 ).

also in 653 other papers