Precision Medical Oxygen Monitor - Manual (Page 14)

13
O
xygen
M
OnitOr
EFFECTS OF HUMIDITY:
High Moisture levels will dilute the oxygen concentration, decreasing the
concentration of oxygen being monitored by the Oxygen Sensor.
High humidity can cause condensation to collect on the Oxygen Sensor,
obstructing the passages and reducing the effectiveness of the Oxygen
Sensor.
CAUTION
To reduce the effects of humidity on the Sensor:
• DO NOT USE the Oxygen Sensor in environments with greater than
95% humidity.
• Place the Oxygen Sensor upstream from the humidifier in a breathing
circuit.
EFFECT OF PRESSURE:
CAUTION
The Oxygen Monitor is no equipped with automatic barometric
pressure compensation.
When the Oxygen Sensor is placed in a breathing circuit, the alternating
“breathing” pressure cycles will be sensed as an increase in oxygen
concentration. The concentration is not actually changing, but it appears to
be due to the change in pressure.
The following recommendation is provided to reduce the chances of pressure
causing false readings.
Calibrate the Precision Medical Oxygen Monitor using 100% Oxygen or room
air at the same pressure and flow as the gas to be monitored.
EFFECTS OF ANESTHETIC GASES:
ANESTHETIC
AGENT
TEST
CONCENTRATION
Oxygen
CONCENTRATION
ERROR
Helium 50%, Balance Oxygen 0%
Nitrous Oxide 80%, Balance Oxygen 0%
Carbon Dioxide 10%, Balance Oxygen 0%
Halothane 4% <1.5% Oxygen*
Enflurane 5% <1.5% Oxygen*
Isoflurane 5% <1.5% Oxygen*
Sevoflurane 5% <1.5% Oxygen*
Desflurane 15% <1.5% Oxygen*
Test mixture = 30% O
2
, balance 70% N
2
O except where noted.