FiO2#

Original NCCID Cleaning Pipeline#

NCCID Function : _rescale_fio2

  • NCCID Cleaning remaps FiO2 entries to the ‘%’ scale, as a combination of units (Litres and %) was provided.

  • ‘0.5’ is remapped to ‘50%’ oxygen.

NCCIDxClean#

New Function : rescale_fio2

Default functionality:

  • ‘0.5’ is remapped to ‘23%’ rather than ‘50%’. The NCCID function assumes ‘0.5’ is 50% oxygen rather than 0.5 Litres as it is a decimal. However, 0.5L is more common than 50% oxygen and is equivalent to 23%.

  • Minimum oxygen is set to 21% (room air), not 0%, which suggests the patient is breathing no oxygen at all. The value is clipped at 21% and 100%.

  • The ‘Any supplemental oxygen: FiO2’ column is merged into the ‘fio2’ column.

Given that the conversion from litres to percentage is an approximation, the user can choose to retain the original values by setting ltrs_to_percent to False if running the function directly. If running the pipeline, you can change the fio2_ltrs_to_percent parameter / argument.