10
C. Quiescent
Test
After attaching the sensor allow the oximeter system under test about 30 seconds to stabilize. The oximeter
system should recognize this as a no pulse condition.
D.
Oxygen Saturation Test
Gently press the FingerSim’s™ color coded end rhythmically keeping a minimum pressure on the FingerSim™
throughout the pulse cycle (see Figure 12). Generate the pulse by slightly increasing and decreasing the
pressure. Do not tap or move your finger away from the FingerSim™. This may create unwanted motion
artifact by rocking the FingerSim™. The oximeter system should recognize the simulated pulse and display a
pulse rate correlating to the input. The SpO
2
display should approximate the nominal value of the FingerSim™.
NOTE:
Some slight variation in the SpO
2
readings between manufacturers is possible due to each
manufacturer’s interpretation of how the SpO
2
value relates to the absorption of the red and infrared
light in blood (see Theory of Operation).
Figure 12. Generating a Simulated Pulse
E.
Pulse Rate Test
Vary the input pulse rate by rhythmically pressing the FingerSim™ colored coded end at fast and slow rates.
The pulse oximeter system should indicate high and low pulse rates. Verify that the pulse oximeter system
recognizes each pulse generated and that there are no extra pulses indicated by the oximeter.
F.
Pulse Amplitude Test
The amplitude of the pulse waveforms being generated can be varied between 0% and 5% modulation levels by
changing the amount of pressure used to generate the pulse waveform. These amplitude changes should be
displayed by the oximeter on the perfusion indicator (various display techniques have been used by oximeter
manufacturers: colored coded L.E.D.s, L.E.D. bar graphs, L.C.D. waveforms, etc.).
