Anaesthesia Estimation of FiO2 calculation during the use of nasal cannula in a child is A 21% + (Nasal Cannula flow (L/min) X 1) B 21% + (Nasal Cannula flow (L/min) X 2) C 21% + (Nasal Cannula flow (L/min) X 3) D 21% + (Nasal Cannula flow (L/min) X 4) 💡 Explanation Estimation of FiO2 calculation during the use of nasal cannula in a child is ✓ Correct Answer: C. 21% + (Nasal Cannula flow (L/min) X 3)