Discuss how to determine if a patient has compensated, uncompensated, or partially compensated respiratory acidosis? What changes would be recommended for a mechanically ventilated patient with a blood gas of 7.29/75/24/67? Discuss all available options, the order you would apply them, and the reasoning. Define the a/A ratio and its relevance to managing mechanical ventilation. Discuss the etiology and pathophysiology of ARDS and ALI. Include patient presentation. Discuss all methods of lung protective strategies and how they assist with barotrauma prevention. Discuss the differences between utilizing PEEP and FiO2 for management of PaO2.