A diagnosis of respiratory failure can be made if which of the following are present?
I.PaO₂ 55 mm Hg, FIO₂ 0.21, P_B 760 mm Hg
II.PaCO₂ 57 mm Hg, FIO₂ 0.21, P_B 760 mm Hg
III.P(A-a) O₂ 45 mm Hg, FIO₂ 1.0, P_B 760 mm Hg
IV.PaO₂/FIO₂ 400, P_B 750 mm Hg

Question

Quizplus · Accepted Answer

Respiratory failure can be diagnosed based on abnormalities in blood gas measurements, specifically hypoxemia (low oxygen levels) and hypercapnia (high carbon dioxide levels). Option I indicates hypoxemia (PaO2 < 60 mm Hg on room air), and Option II indicates hypercapnia (PaCO2 > 45 mm Hg), both of which are criteria for respiratory failure. Options III and IV do not correspond to standard diagnostic criteria for respiratory failure.

A Diagnosis of Respiratory Failure Can Be Made If Which