improve oxygenation and ventilation

Shifting Co2 - depends on tidal volume and respiratory rate

Improving Oxygenation - increase oxygenation and mean airway pressure

causes of hypoxaemia:

• V/Q Mismatch
• R to L shunt
• diffusion defect
• hypoventilation

"MAP increases with increasing PIP, PEEP, ratio of T_I to T_I + T_E, and flow (which increases K by creating a squarer waveform) "

References:
http://emedicine.medscape.com/article/979268-overview#showall