Who is credited with the first vaccine to protect against smallpox?

Full-thickness circumferential burns to the chest:

A) require the paramedic to incise the burn to decompress it. B) may cause significant restriction of respiratory excursion. C) are generally not significant unless the skin is unyielding. D) necessitate immediate intubation and ventilatory support.

A patient is receiving 0.60 FIO2 with a barometric pressure of 755 mm Hg. PCO2 is 56 mm Hg and PaO2 65 mm Hg. The PAO2 for this patient is _____ mm Hg

a. 265.6 c. 354.8 b. 300.9 d. 404.0