Nasal cannula and Sputum analysis
The following values are approximate as the patient’s flow rates, ability
to breathe through the nose, type of cannula and build-up of nasal
mucus may all affect the amount of oxygen received. As a general rule
the FiO2 is raised by 3–4% for each litre of oxygen.
>6 L/min has little effect on FiO 2 and may lead to irritation and drying of
the nasal mucosa.
The following values are approximate as the patient’s flow rates, ability
to breathe through the nose, type of cannula and build-up of nasal
mucus may all affect the amount of oxygen received. As a general rule
the FiO2 is raised by 3–4% for each litre of oxygen.
>6 L/min has little effect on FiO 2 and may lead to irritation and drying of
the nasal mucosa.
