Table 1.
White blood cell counts and pulmonary variables in non-ventilated old and non-ventilated young rats (n = 4/group).
| Old rats | Young rats | P | |
|---|---|---|---|
| TWBC (/μl) | 4,800 ± 524 | 9,037 ± 638 | 0.02 |
| _PMN in blood (/μl) | 867 ± 146 | 1,162 ± 65 | Ns |
| _Macrophages in BAL (/μl) | 11,744 ± 2,172 | 10,882 ± 2,646 | Ns |
| _Protein in BAL (mg/l) | 69 ± 35 | 97 ± 30 | Ns |
| _Lung wet/dry weight ratio | 4.68 ± 0.09 | 4.65 ± 0.06 | Ns |
| _PaO2 at FiO2 1.0 (mmHg) | 270 ± 60 | 446 ± 10 | 0.029 |
| _PMN in BAL (/μl) | Not detectable in 3; low counts in 1 animal | Not detectable | n.a. |
Values are mean ± SEM.
BAL, bronchoalveolar lavage; FiO2, fraction of inspired oxygen; n.a., not applicable; PaO2, arterial oxygen tension; PMN, polymorphonuclear neutrophils; TWBC, total white blood cell count