22-2 DELTA/DELTA XL/KAPPA VF8
22 F
IO2 (FRACTIONAL INSPIRED O2) MONITORING
Overview
The monitor measures fractional inspired oxygen concentration (FiO
2
), in neonatal
mode only, via the NeoMed pod and an FiO
2
sensor. The FiO
2
sensor is typically
placed in the incubator or under the oxygen hood and near the infant’s head. As
varying concentrations of oxygen diffuse into the sensor, two electrodes generate a
current proportional to the partial pressure of oxygen in the air of the hood or
incubator. The monitor measures this electrical current and converts it to a percentage,
which it then displays on the monitor.
Because the sensor responds to partial pressure of oxygen (and not percentage),
changes in barometric pressure can affect the reading even if the percent of oxygen
being monitored stays the same. Changes in humidity change the percentage of
oxygen in the air (but not the partial pressure). As a result, the reading does not change
and may not accurately reflect the concentration of oxygen. For example, if 100%
oxygen is displayed as saturated with 100 % humidity, the actual concentration of
oxygen is 97 %.
The FiO
2
sensor, which has a minimal response to gases other than oxygen, is
sensitive to changes in barometric pressure and humidity. Do not handle the sensor
unnecessarily, as your body heat can temporarily cause it to produce error.
FiO
2
sensors contain lead. Dispose of sensors properly and in accordance with local
regulations.
Precautions
WARNING: Setting alarm limits below 21 % may expose
patients to low oxygen levels, compromising primary organ
function.
CAUTION: Dispose of a leaking sensor according to local regulations. Because the
sensor contains caustic materials, avoid contact with eyes, skin or clothing.
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