Research Article

Role of Meconium and Hypoxia in Meconium Aspiration-Induced Lung Injury in Neonatal Rabbits

Table 1

(a) Total lung lavage cell count after exposure to saline, meconium, and milk.

TimeSaline (total lavage cells)Meconium (total lavage cells)Milk (total lavage cells)

0 hours 1 5 . 1 ± 2 . 1 × 1 0 3 1 4 . 8 ± 5 . 1 × 1 0 3 1 6 . 2 ± 3 . 2 × 1 0 3
4 hours 1 6 . 0 ± 2 . 7 × 1 0 3 1 2 . 1 ± 8 . 8 × 1 0 3 1 4 . 7 ± 2 . 9 × 1 0 3
8 hours 1 4 . 2 ± 2 . 1 × 1 0 3 1 0 . 7 ± 5 . 2 × 1 0 3 1 5 . 2 ± 3 . 7 × 1 0 3
24 hours 1 2 . 9 ± 2 . 4 × 1 0 3 8 . 8 ± 1 1 . 1 × 1 0 3 1 3 . 8 ± 2 . 6 × 1 0 3

* 𝑃 < . 0 5 versus 0 hrs
Meconium group demonstrated a lower total lavage cell number compared to saline and milk groups. At 8 and 24 hrs after meconium instillation, the decrease of cells is significantly lower ( 𝑃 < . 0 5 ) than baseline.
(b) Total lung lavage cell count after exposure to hypoxia and hyperoxia.

TimeHypoxia group (total lavage cells)Hyperoxia group (total lavage cells)

15 min 9 . 1 2 . 3 × 1 0 3 1 2 . 6 2 . 5 × 1 0 3

Lavage from hypoxic animals contained lower number of total cells, compared to hyperoxia group.