PALS 2025 Low flow O2 systems Exam
Questions and Answers
A low flow delivery system does what? - Correct Answer✔️✔️-Delivers air through a nasal
cannula or a simple mask that does not fit tightly against the childs face.
Low flow systems provide how much inspired O2 concentration?
Who uses them? - Correct Answer✔️✔️-22- 60%
Used for stable children who require a low inspired O2 concentration, such a when a child is not in
severe respiratory distress or shock
Examples of low flow systems? - Correct Answer✔️✔️-Nasal cannula and simple mask
O2 flow rate for nasal cannula - Correct Answer✔️✔️-0.25 to 4 L/min
Simple mask flow rate? - Correct Answer✔️✔️-6-10 L/min Inspired O2 concentration of 35- 60%
Why cant the simple mask deliver inspired O2 concentration greater than 60%? - Correct
Answer✔️✔️-Because room air enters between the mask and face during inspiration
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1
,high flow O2 delivery systems do what? Flow rate?
When should they be used?
Most common example of High flow O2 system? - Correct Answer✔️✔️-Deliver O2
concentration 60% or greater (95%) . Flow rate is 10L.
Used in emergency situations whenever the child has respiratory distress or shock
Nonrebreathing mask
Nonrebreathing mask valves do what? - Correct Answer✔️✔️-A valve in 1 or both exhalation
ports to prevent room air from entering during inspiration
Valve between reservoir bag and mask to prevent flow of exhaled gas into reservoir
How do you prevent bag collapse in nonrebreather? - Correct Answer✔️✔️-Adjust O2 flow rate
into mask. Greater than 10L
During inspiration how much O2 is drawn by the child with a nonrebreather? - Correct
Answer✔️✔️-100% from the reservoir bag and O2 inflow
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 2
, High Flow nasal cannula - Correct Answer✔️✔️-O2 can be adjusted from 4 L in infants up to 40 L
or more in adolescents. Deliver a combo of room air and oxygen.
Gas flow for nebulizer? How long? - Correct Answer✔️✔️-5-6L/min
8-10 min
Does skin pigment affect accuracy or function of the pulse oximeter? - Correct Answer✔️✔️-False
What must you confirm with a pulse ox? - Correct Answer✔️✔️-Confirm validity of oximeter data
by evaluating Childs appearance. Also compare HR displayed by pulse ox with HR displayed by the
bedside monitor
respiratory arrest - Correct Answer✔️✔️-The absence of respirations (apnea) with detectable
cardiac activity. Must provide rescue breathing to prevent cardiac arrest
When should endotracheal intubation be considered? - Correct Answer✔️✔️-If the child is
unstable to maintain effective airway, oxygenation, or ventilation despite initial intervention.
DOPE - Correct Answer✔️✔️-Displacement
Obstruction
Pneumothorax
Equipment failure
Could cause deterioration of the pt
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 3
Questions and Answers
A low flow delivery system does what? - Correct Answer✔️✔️-Delivers air through a nasal
cannula or a simple mask that does not fit tightly against the childs face.
Low flow systems provide how much inspired O2 concentration?
Who uses them? - Correct Answer✔️✔️-22- 60%
Used for stable children who require a low inspired O2 concentration, such a when a child is not in
severe respiratory distress or shock
Examples of low flow systems? - Correct Answer✔️✔️-Nasal cannula and simple mask
O2 flow rate for nasal cannula - Correct Answer✔️✔️-0.25 to 4 L/min
Simple mask flow rate? - Correct Answer✔️✔️-6-10 L/min Inspired O2 concentration of 35- 60%
Why cant the simple mask deliver inspired O2 concentration greater than 60%? - Correct
Answer✔️✔️-Because room air enters between the mask and face during inspiration
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1
,high flow O2 delivery systems do what? Flow rate?
When should they be used?
Most common example of High flow O2 system? - Correct Answer✔️✔️-Deliver O2
concentration 60% or greater (95%) . Flow rate is 10L.
Used in emergency situations whenever the child has respiratory distress or shock
Nonrebreathing mask
Nonrebreathing mask valves do what? - Correct Answer✔️✔️-A valve in 1 or both exhalation
ports to prevent room air from entering during inspiration
Valve between reservoir bag and mask to prevent flow of exhaled gas into reservoir
How do you prevent bag collapse in nonrebreather? - Correct Answer✔️✔️-Adjust O2 flow rate
into mask. Greater than 10L
During inspiration how much O2 is drawn by the child with a nonrebreather? - Correct
Answer✔️✔️-100% from the reservoir bag and O2 inflow
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 2
, High Flow nasal cannula - Correct Answer✔️✔️-O2 can be adjusted from 4 L in infants up to 40 L
or more in adolescents. Deliver a combo of room air and oxygen.
Gas flow for nebulizer? How long? - Correct Answer✔️✔️-5-6L/min
8-10 min
Does skin pigment affect accuracy or function of the pulse oximeter? - Correct Answer✔️✔️-False
What must you confirm with a pulse ox? - Correct Answer✔️✔️-Confirm validity of oximeter data
by evaluating Childs appearance. Also compare HR displayed by pulse ox with HR displayed by the
bedside monitor
respiratory arrest - Correct Answer✔️✔️-The absence of respirations (apnea) with detectable
cardiac activity. Must provide rescue breathing to prevent cardiac arrest
When should endotracheal intubation be considered? - Correct Answer✔️✔️-If the child is
unstable to maintain effective airway, oxygenation, or ventilation despite initial intervention.
DOPE - Correct Answer✔️✔️-Displacement
Obstruction
Pneumothorax
Equipment failure
Could cause deterioration of the pt
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 3
