RNSG 2539 EXAM 2
(Gas Exchange) with
correct answers
2025/2026
Causes of metabolic acidosis - correct answersKetoacidosis
Lactic Acidosis
Renal Failure
Diarrhea
Causes of metabolic alkalosis - correct answersVomiting
NG suctioning
Diuretic therapy
Severe Hypokalemia
Alkali administration
Steroid therapy
SaO2 normal range - correct answers95-100%
, PaO2 normal range - correct answers80-100
65-75 if 1 mile above sea level
Complications that may arise from prolonged O2 toxicity - correct answersSevere pulmonary
edema
Shunting of blood
Hypoxemia
*O2 administered above 60% or for more than 24 hours should be considered toxic*
*O2 delivered at below 40% is generally nontoxic*
Definition of acute hypoxemic respiratory failure - correct answersO2 sat <60% despite receiving
O2 supplement of 60% or >
Definition of acute hypercapnic respiratory failure - correct answersPCO2 greater than 45% with
acidemia
Classic sign of diffusion limitation - correct answersHypoxemia present during excercise but not
at rest
Normal FiO2 range - correct answersBetween 21 and 100%
ARDS P/F Ratios - correct answersMild: >200 to ≤300
Moderate: 100 to ≤200
(Gas Exchange) with
correct answers
2025/2026
Causes of metabolic acidosis - correct answersKetoacidosis
Lactic Acidosis
Renal Failure
Diarrhea
Causes of metabolic alkalosis - correct answersVomiting
NG suctioning
Diuretic therapy
Severe Hypokalemia
Alkali administration
Steroid therapy
SaO2 normal range - correct answers95-100%
, PaO2 normal range - correct answers80-100
65-75 if 1 mile above sea level
Complications that may arise from prolonged O2 toxicity - correct answersSevere pulmonary
edema
Shunting of blood
Hypoxemia
*O2 administered above 60% or for more than 24 hours should be considered toxic*
*O2 delivered at below 40% is generally nontoxic*
Definition of acute hypoxemic respiratory failure - correct answersO2 sat <60% despite receiving
O2 supplement of 60% or >
Definition of acute hypercapnic respiratory failure - correct answersPCO2 greater than 45% with
acidemia
Classic sign of diffusion limitation - correct answersHypoxemia present during excercise but not
at rest
Normal FiO2 range - correct answersBetween 21 and 100%
ARDS P/F Ratios - correct answersMild: >200 to ≤300
Moderate: 100 to ≤200
