Table 4.
18O concentration in bronchoalveolar lavage and nasal lavage of human subjects exposed for 2 hours to 0.4 ppm 18O3: intermittent exercise versus rest during exposure.
| Bronchoalveolar lavage | Nasal lavage | ||
|---|---|---|---|
|
| |||
| Cell pellet | Surfactant | ||
| Excess oxygen-18, ug/g dry weight | |||
| Resting | 5.6 ± 1.7 (6) | 26.4 ± 2.4 (3) | 377 ± 62 (5) |
| Exercise (1) | 28.4 ± 5.5 (8) | 51.6 ± 7.9 (8) | 192 ± 58 (8) |
| Exercise/resting | 5.07 | 1.95 | 0.51 |
| Resting F344 rat (1) | 7.5 ± 1.6 (6) | 10.9 ± 1.4 (8) | NM |
Notes: Shaded values are newly reported here. (1) From Hatch et al, 1994. All enrichments in 18O are significantly elevated above baseline. Means ± standard error are given for (N) subjects or rats.
Abbreviation: NM, not measured.