Table 2:
Respiratory parameters for mice (n=8/group) were exposed to flaming and smoldering burn pit materials plywood (PW), cardboard (CB), plastic (PL) and a mixture (MX) for 1 hour on 2 consecutive days, presented as change from baseline average ± SEM. *P < 0.05 compared to all other fuel types, #P < 0.05 compared to matched fuel smoldering conditions. CB, PL, MXP < 0.05 when compared to that fuel type. Bolded text: P < 0.05 when compared to matched whole smoke condition.
| Smoldering | Ti (Δ msec) | Te (Δ msec) | RT (Δ msec) | PIF (Δ mL/s) | PEF (Δ mL/s) | TV (Δ mL) | |
|---|---|---|---|---|---|---|---|
| PW | whole | 43.3 ± 7.6 | 291.1 ± 26.1 | 271.6 ± 23.2 | −0.71 ± 0.06CB | −0.59 ± 0.07* | −0.02±0.01CB,PL |
| filtered | 12.7 ± 2.6 | 116.4 ± 9 | 104.7 ± 9.1 | −0.04 ± 0.08 | −0.07 ± 0.09 | 0.02 ± 0.01 | |
| CB | whole | 48.9 ± 5.8 | 240.7 ± 19.9PL | 211.4 ± 19.6 | −0.37 ± 0.05 | −0.26 ± 0.03 | 0.02 ± 0.01 |
| filtered | 31.0 ± 2.9 | 205.2 ± 7.5 | 180.6 ± 4.7 | −0.29 ± 0.04 | −0.24 ± 0.03 | 0.02 ± 0.01 | |
| PL | whole | 58.6 ± 6.5 | 358.2 ± 26.2 | 248.1 ± 27.8 | −0.46 ± 0.08 | −0.37 ± 0.07 | 0.04 ± 0.01MX |
| filtered | 38.2 ± 5.9 | 253.2 ± 10.3 | 225.8 ± 9.0 | −0.07 ± 0.07 | −0.07 ± 0.1 | 0.04 ± 0.01 | |
| MX | whole | 50.4 ± 7.5 | 290.9 ± 16.4 | 278.1 ± 16.6 | −0.54 ± 0.1 | −0.27 ± 0.06 | 0.01 ± 0.01 |
| filtered | 27.6 ± 3.4 | 157.9 ± 14.3 | 146.0 ± 13.4 | −0.14 ± 0.1 | −0.04 ± 0.07 | 0.03 ± 0.01 | |
| Flaming | Ti (Δ msec) | Te (Δ msec) | RT (Δ msec) | PIF (Δ mL/s) | PEF (Δ mL/s) | TV (Δ mL) | |
| PW | whole | 11. 5 ±2.1#MX | 99.2±10.6#PL,MX | 97.9 ± 10#PL,MX | −0.78 ± 0.09* | −0.6 ± 0.1* | −0.05 ± 0.01* |
| filtered | 7.3 ± 1.3 | 40.3 ± 2.7# | 32.6 ± 2# | −0.14 ± 0.05 | −0.18 ± 0.05 | 0.01 ± 0.01 | |
| CB | whole | 14.4 ± 2.2#MX | 108.3±5.8#PL,MX | 101.5±4.9#PL,MX | −0.11 ± 0.05# | −0.16 ± 0.06PL | 0.02 ± 0.01 |
| filtered | 5.4 ± 0.8# | 58.8 ± 6.1# | 53.1 ± 5.4# | −0.19 ± 0.04 | −0.27 ± 0.04 | −0.01 ± 0.01# | |
| PL | whole | 8.5 ± 1# | 24.1 ± 2.1# | 26.2 ± 2.1# | 0.13 ± 0.06# | 0.21 ± 0.07# | 0.03 ± 0.01 |
| filtered | 1.8 ± 1.7# | 17.5 ± 3.4# | 9.5 ± 3.3# | 0.12 ± 0.04# | 0.05 ± 0.07 | 0.02 ± 0.01# | |
| MX | whole | 1.7 ± 2.5# | 9 ± 4.8# | 6.4 ± 4.1# | 0.12 ± 0.09# | 0.11 ± 0.07# | 0.02 ± 0.01 |
| filtered | 0.7 ± 2.3# | 16.5 ± 5.4# | 14.2 ± 4# | −0.05 ± 0.04 | −0.11 ± 0.04 | 0.01 ± 0.01# |