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1. Question
A client is receiving oxygen per nasal cannula at 3L/minute. Which of the following is the approximate inspired oxygen concentration (FiO2)?
Correct
Option A is the correct answer:
Rationale: nasal cannula at 3L/min delivers an FiO2 of approximately 28–32%. The flow rate for nasal cannulas ranges from 0.5 L/min (21–24% FiO2) to 6 L/min (40–44% FiO2), but should not be administered at a higher flow rate because the FiO2 will not increase, and it can result in drying of the mucous membranes. Face masks, non-rebreathing masks, partial re-breathing masks, and Venturi masks can be used if a higher FiO2 is needed.
Incorrect
Option A is the correct answer:
Rationale: nasal cannula at 3L/min delivers an FiO2 of approximately 28–32%. The flow rate for nasal cannulas ranges from 0.5 L/min (21–24% FiO2) to 6 L/min (40–44% FiO2), but should not be administered at a higher flow rate because the FiO2 will not increase, and it can result in drying of the mucous membranes. Face masks, non-rebreathing masks, partial re-breathing masks, and Venturi masks can be used if a higher FiO2 is needed.
Nasal Cannula:
Advantages:
Provides low-moderate O2 concentration (22%-40%) Child is able to eat and talk while getting O2 Possibility of more complete observation of child because nose and mouth remain unobstructed.
Disadvantages:
Must have patent nasal passages May cause abdominal distention and discomfort or vomiting Difficulty controlling O2 concentrations if child breathes through mouth Inability to provide mist if desired
