Invivo Magnitude 3150M, Operation Manual

Page: 47 / 80

4-9
WARNING
Frequent medical attention to sensor site for possible pressure tissue necrosis should be
given during longer term monitoring sessions (4 hours or more), especially on tender skin of
neonatal patients. Special care should be exercised when tape is used to secure the sensor,
as the stretch memory property of most tapes can easily apply unintended levels of pressure
to the mounting site.
Figure 4-8. The SpO2 Display
4.4 SpO2 Monitoring. Select the Fiberoptic SpO2 sensor to be used and connect to the SpO2
isolated patient connector on the Parameter Input Panel. Place probe in desired location on patient.
After four to six pulses, the oxygen saturation value (percent of saturation) and pulse waveform (if
selected) will appear on the display.
a. Pulse Tone Modulation. The Pulse Tone is modulated over a range of 70 to 100%
saturation level by the SpO2 value with the volume adjustment located in the System
Screen. To access the System Screen, press and hold the Alarm Key until the system
Screen appears then use the ECG Size control key to increase the volume and the
ECG Lead control key to decrease the volume. The Pulse Tone Modulation Volume
is adjustable from 1 to 10 with Default set at 6.
4.4.1 SpO2 Monitoring Considerations. The pulse oximeter requires the detection of valid pulses
to correctly determine saturation and rate values. This monitor incorporates both audible and visual
pulse indicators. Operators should become familiar with the interpretation of these indicators (i.e.:
when no pulses are being detected, saturation/rate values may not be beat-to-beat and when gross
artifact is received, incorrect values could result).
Do not place the probe on the same limb with an inflated blood pressure cuff. Cuff inflation could
result in inaccurate readings and false alarm limit violations.
Sensor should be shielded from excessive extraneous incident light sources. Such extraneous light
can cause reading error or pulse detection failure.
4.4.2 Patient and Probe Preparation. Ensure that the patient is not wearing fingernail polish, and
does not have artificial or long fingernails. These may cause a reduction in transmitted light levels,
result in low signal levels and inaccurate readings.
Insert the patient's finger into the probe housing until it touches the raised finger stop inside the
probe. Ensure that the surface of the finger tip covers the detector window inside the probe.
4.4.3 Associated Displays. (
See Figure 4-8
) SpO2 is displayed in the Trace C location when
Invasive Pressure 2 (P2) is turned Off; if P2 is On it is displayed in the Trace C location and the
SpO2 numeric ONLY is displayed to the right of the NIBP numerics on the bottom of the Normal
Screen. The following is a description of the SpO2 Display:
a. SpO2 Numeric. ( Item 1 ) A numeric indication of the patient's SpO2 reading.