F9 and F9 Express Fetal & Maternal Monitor User Manual Maternal Monitoring
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WARNING
6 Setting the SpO
2
higher alarm limit to 100% is equivalent to switching off the alarm on
higher limit. High oxygen levels may predispose a premature infant to retrolental
fibroplasia. Therefore, the higher alarm limit for oxygen saturation must be carefully
selected in accordance with commonly accepted clinical practices.
CAUTION
Compatibility between the monitor and transducer should be verified before use to avoid
injuring the patient or operator.
NOTE:
1 The device is calibrated to display functional oxygen saturation.
2 A functional tester cannot be used to assess the accuracy of the SpO
2
transducer or
the monitor.
3 The monitor does not have specific SpO
2
calibration baselines.
4 SpO
2
waveform is not proportional to the pulse volume.
5 Injected dyes such as methylene blue or intravascular dyshemoglobins such as
methemoglobin and carboxyhemoglobin may lead to inaccurate measurements.
6 SpO
2
measurement is not applicable during low perfusion and movement.
Measurement Limits -
In operation, the accuracy of oximetry readings can be affected by:
1) Magnetic resonance imaging (MRI) scanning. Induced current could potentially cause burns.
2) Excessive patient movement.
3) Low perfusion.
4) High-frequency electrical noise, including noise created by the host system, or noise from
external sources, such as electrosurgical apparatus, which is admitted by the host system.
5) Intravascular dye injections.
6) Improper sensor application.
7) Sensor temperature. (Maintain the temperature between +28 ℃ (+82.4 °F) and +41 ℃
(+105.8 °F ) for best operation)
8) Placement of the sensor, such as on an extremity that has a NIBP cuff, arterial catheter, or
intravascular line.
9) Significant concentrations of dysfunctional hemoglobin, such as carboxyhemoglobin and
methemoglobin.
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