Figure 3.

Effect of burn and smoke injury and Na₂S treatment on pulmonary gas exchange. (A) Na₂S treatment versus all control animals; (B) Na₂S treatment versus non-surviving animals during the experimental period. Note that Na₂S treatment after combined injury resulted in arterial partial pressure of oxygen/fraction of inspired oxygen (PaO₂/FiO₂) ratio recovery after 48 h. Comparisons were made using two-way analysis of variance with a Tukey-Kramer post hoc procedure. There were only two animals in the control group from 72 to 96 h. *P≤ 0.05 versus control.