Table 1.

Morphometric measurements

Treatment	No. of Air Spaces	Mean Area, μm2	Mean Perimeter, μm	Total Perimeter, μm	Wall Thickness, μm
Day 14
Saline/RA	142.8 ± 6	8,848 ± 387	515 ± 27	74,335 ± 4,701	10 ± 0.18
Saline/85% O2	49.9 ± 1†	26,848 ± 956†	858 ± 34†	42,808 ± 1,968†	10 ± .025
LPS/RA	109.1 ± 1†	12,078 ± 189*	558 ± 10	66,836 ± 1,497	13 ± 0.4*
LPS/85% O2	55.4 ± 3†	23,587 ± 1,557†	820 ± 26†	49,723 ± 1,663†	23 ± 1.75†
Day 28
Saline/RA	117.1 ± 7	7,562 ± 331	391 ± 17	45,082 ± 2,834	12 ± 0.32
Saline/85% O2	75.1 ± 7†	10,969 ± 888†	481 ± 25*	35,230 ± 2,478†	14 ± 0.7†
LPS/RA	143 ± 7*	6,019 ± 400†	358 ± 14	5,0451 ± 1,905	15 ± 0.3†
LPS/85% O2	51.2 ± 5†	14,680 ± 1,926†	587 ± 65†	28,703 ± 2,390†	21 ± 0.33†

Values are means ± SE. RA, room air. Data were analyzed by 2-way ANOVA with modified t-test post hoc (n = 6 per group):

^*P ≤ 0.05 and

^†P ≤ 0.01 vs. saline/RA.