Oxygen Delivery Devices Exam Questions with Correct Answers
(Grade A+)
Question 1: What is oxygenation?
Answer: the process of oxygen diffusing passively from the alveolus to the pulmonary capillary, where it
binds to hemoglobin in red blood cells or dissolves into the plasma.
Question 2: What is hypoxemia?
Answer: Insufficient oxygenation in the blood
Question 3: The rate of oxygen transport from the lungs to the peripheral tissues
Answer: Oxygen delivery
Question 4: The rate at which oxygen is removed from the blood for use by the tissues.
Answer: Oxygen consumption
Question 5: What does DO2 mean
Answer: Oxygen delivery
Question 6: What is the formula to calculate DO2?
Answer: DO2 = CO X CaO2
Question 7: What is the formula to calculate CaO2?
Answer: CaO2= (Hb x 1.34 x SaO2) + (PaO2 x 0.003)
Question 8: What does CaO2 stand for?
Answer: Arterial oxygen content
Question 9: What are the causes of Hypoxia
Answer: Hypoxemia Abnormal Hgb Anemia Poor perfusion Disruption of cellular uptake
Question 10: What are the 5 causes of Hypoxemia?
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, Answer: -VQ mismatch (pneumonia) -Hypoventilation (COPD) -Right-to-left shunting (Cor pulmonal)
-Diffusion Defects (pulmonary fibrosis) -Low PiO2 (Altitude)
Question 11: What is the minimum flow rate when placing a pt on a mask?
Answer: 5LPM
Question 12: What is the most common cause of hypoxemia?
Answer: VQ mismatch
Question 13: What can Hypoxemia lead to?
Answer: Hypoxic Respiratory Failure
Question 14: What are the parameters for Hypoxic Respiratory Failure? What might it require?
Answer: -Defined as a PaO2 / FiO2 ratio <200 or an -PA-aO2 difference >350 mm Hg on FiO2 -1.00 May
require positive pressure ventilation
Question 15: Hypoventilation can be a cause of what?
Answer: Acute Respiratory Failure
Question 16: What is hypoventilation and when does it occur?
Answer: -WOB exceeds patient's capacity -Occurs when the drive to breathe is lost, WOB is high, and/or
muscle strength is weak or fatigued
Question 17: What occurs with acute respiratory failure?
Answer: Increase in PaCO2 that results in a pH <7.30
Question 18: What happens if respiratory acidosis is compensated by the kidneys retaining
bicarbonate?
Answer: pH returns to >7.35
Question 19: Acute elevations in PaCO2 can lead to what?
Answer: Acute or chronic respiratory failure
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(Grade A+)
Question 1: What is oxygenation?
Answer: the process of oxygen diffusing passively from the alveolus to the pulmonary capillary, where it
binds to hemoglobin in red blood cells or dissolves into the plasma.
Question 2: What is hypoxemia?
Answer: Insufficient oxygenation in the blood
Question 3: The rate of oxygen transport from the lungs to the peripheral tissues
Answer: Oxygen delivery
Question 4: The rate at which oxygen is removed from the blood for use by the tissues.
Answer: Oxygen consumption
Question 5: What does DO2 mean
Answer: Oxygen delivery
Question 6: What is the formula to calculate DO2?
Answer: DO2 = CO X CaO2
Question 7: What is the formula to calculate CaO2?
Answer: CaO2= (Hb x 1.34 x SaO2) + (PaO2 x 0.003)
Question 8: What does CaO2 stand for?
Answer: Arterial oxygen content
Question 9: What are the causes of Hypoxia
Answer: Hypoxemia Abnormal Hgb Anemia Poor perfusion Disruption of cellular uptake
Question 10: What are the 5 causes of Hypoxemia?
Page 1
, Answer: -VQ mismatch (pneumonia) -Hypoventilation (COPD) -Right-to-left shunting (Cor pulmonal)
-Diffusion Defects (pulmonary fibrosis) -Low PiO2 (Altitude)
Question 11: What is the minimum flow rate when placing a pt on a mask?
Answer: 5LPM
Question 12: What is the most common cause of hypoxemia?
Answer: VQ mismatch
Question 13: What can Hypoxemia lead to?
Answer: Hypoxic Respiratory Failure
Question 14: What are the parameters for Hypoxic Respiratory Failure? What might it require?
Answer: -Defined as a PaO2 / FiO2 ratio <200 or an -PA-aO2 difference >350 mm Hg on FiO2 -1.00 May
require positive pressure ventilation
Question 15: Hypoventilation can be a cause of what?
Answer: Acute Respiratory Failure
Question 16: What is hypoventilation and when does it occur?
Answer: -WOB exceeds patient's capacity -Occurs when the drive to breathe is lost, WOB is high, and/or
muscle strength is weak or fatigued
Question 17: What occurs with acute respiratory failure?
Answer: Increase in PaCO2 that results in a pH <7.30
Question 18: What happens if respiratory acidosis is compensated by the kidneys retaining
bicarbonate?
Answer: pH returns to >7.35
Question 19: Acute elevations in PaCO2 can lead to what?
Answer: Acute or chronic respiratory failure
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