Oxygen Delivery Devices Questions with Correct Answers (Grade
A+)
Question 1: Entrainment Ratios
Answer: each Air Entrainment device pulls in a precise amount of room air according to its window/ or jet's
port for a fixed flow of oxygen to the patient
Question 2: 40% entrainment jet or window
Answer: has a ratio of 3:1 RmAir/Oxygen respectively
Question 3: 50% entrainment jet /window
Answer: has a ratio of 1:1.71 RmAir/Oxygen respectively
Question 4: 60% entrainment jet / window
Answer: has a ratio of 1:1 RmAir/Oxygen respectively
Question 5: 100% entrainment jet/window
Answer: has a ratio of 0:1 RmAir/Oxygen respectively
Question 6: Indications for Oxygen Therapy are
Answer: Chronic Hypoxemia, to Reduce the Cardio/Pulmonary work load and in cases of acute Hypoxemia
Question 7: Physiological Responses to Hypoxemia
Answer: Increased Respiratory Rate/ Tachypnea, Increased Heart Rate/ Tachycardia, Cyanosis ( both
Central ande Peripheral), cooler Skin Temperature, Slowed Capillary refill ( greater than 3 seconds)
Question 8: Simple Mask
Answer: LOW FLOW DEVICE, 5-10 LPM, capable of delivering a range of 40- 50% FiO2
Question 9: Nasal Cannula
Answer: LOW FLOW DEVICE, add humidity at above 4 LPM , Flow Rate of 1-6 lpm , range of 24 - 45%
Use for COPD / Hypoxic drive
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, Question 10: Conversion Factor for Heliox
Answer: at a 20/80 blend, multiply the flow by 1.8
Question 11: Conversion Factor for Heliox
Answer: at a 30/70 blend, mulitply the flow by 1.6
Question 12: Simple Mask
Answer: Low Flow Device, Is used on a flow of 5-10 to keep CO2 flushed, delivers 40-50% FiO2,
Question 13: Partial Rebreather
Answer: Is a LOW FLOW DEVICE used to treat hypoventilation, delivers an FiO2 of 60-65% at a flow rate
of 6-10
Question 14: NON Rebreather
Answer: has two gaskets left in the partial rebreather to create a high flow device, is used at a flow rate of
10, delivering 21% - 100% Fi02, is used in case of emergency to deliver 100% oxygen
Question 15: Venturi Mask
Answer: High Flow Device used at an LPM of 4-12 and used to deliver an FiO2 of 24%- 50% and is used at
24-28% for short periods of precise Fio2
Question 16: The lowest acceptable PaO2 in a healthy adult under 60yrs old is
Answer: 80
Question 17: The Lowest acceptable PaO2 in an elderly adult is
Answer: 70. The PaO2 drops by 1 per year after age 60 until age 70, but never goes below 60
Question 18: Hypoxemia is caused by
Answer: True Shunting and V/Q inequities
Question 19: Hypoxia is
Answer: low 02 at the tissue level
Page 2
A+)
Question 1: Entrainment Ratios
Answer: each Air Entrainment device pulls in a precise amount of room air according to its window/ or jet's
port for a fixed flow of oxygen to the patient
Question 2: 40% entrainment jet or window
Answer: has a ratio of 3:1 RmAir/Oxygen respectively
Question 3: 50% entrainment jet /window
Answer: has a ratio of 1:1.71 RmAir/Oxygen respectively
Question 4: 60% entrainment jet / window
Answer: has a ratio of 1:1 RmAir/Oxygen respectively
Question 5: 100% entrainment jet/window
Answer: has a ratio of 0:1 RmAir/Oxygen respectively
Question 6: Indications for Oxygen Therapy are
Answer: Chronic Hypoxemia, to Reduce the Cardio/Pulmonary work load and in cases of acute Hypoxemia
Question 7: Physiological Responses to Hypoxemia
Answer: Increased Respiratory Rate/ Tachypnea, Increased Heart Rate/ Tachycardia, Cyanosis ( both
Central ande Peripheral), cooler Skin Temperature, Slowed Capillary refill ( greater than 3 seconds)
Question 8: Simple Mask
Answer: LOW FLOW DEVICE, 5-10 LPM, capable of delivering a range of 40- 50% FiO2
Question 9: Nasal Cannula
Answer: LOW FLOW DEVICE, add humidity at above 4 LPM , Flow Rate of 1-6 lpm , range of 24 - 45%
Use for COPD / Hypoxic drive
Page 1
, Question 10: Conversion Factor for Heliox
Answer: at a 20/80 blend, multiply the flow by 1.8
Question 11: Conversion Factor for Heliox
Answer: at a 30/70 blend, mulitply the flow by 1.6
Question 12: Simple Mask
Answer: Low Flow Device, Is used on a flow of 5-10 to keep CO2 flushed, delivers 40-50% FiO2,
Question 13: Partial Rebreather
Answer: Is a LOW FLOW DEVICE used to treat hypoventilation, delivers an FiO2 of 60-65% at a flow rate
of 6-10
Question 14: NON Rebreather
Answer: has two gaskets left in the partial rebreather to create a high flow device, is used at a flow rate of
10, delivering 21% - 100% Fi02, is used in case of emergency to deliver 100% oxygen
Question 15: Venturi Mask
Answer: High Flow Device used at an LPM of 4-12 and used to deliver an FiO2 of 24%- 50% and is used at
24-28% for short periods of precise Fio2
Question 16: The lowest acceptable PaO2 in a healthy adult under 60yrs old is
Answer: 80
Question 17: The Lowest acceptable PaO2 in an elderly adult is
Answer: 70. The PaO2 drops by 1 per year after age 60 until age 70, but never goes below 60
Question 18: Hypoxemia is caused by
Answer: True Shunting and V/Q inequities
Question 19: Hypoxia is
Answer: low 02 at the tissue level
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