Bionet BM7VET, Operation Manual

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83
BM7Vet Pro User’s Manual
Note
SpO
2
WAVE SIZE changes automatically.
Signal and Data Validity
It is extremely important to determine that the probe is attached to the animal correctly and the
data is verifiable. To make this determination, three indications from the monitor are of
assistance
— signal strength bar, quality of the SPO
2
waveform, and the stability of the SPO
2
values.
It is critical to observe all three indications simultaneously when ascertaining signal and data
validity.
Signal Strength Bar
The signal strength bar is displayed within the SPO
2
values window. This bar consists of 10 blocks
set depending on the strength of the signal. Proper environmental conditions and probe
attachment will help to ensure a strong signal.
Quality of SPO
2
Waveform
Under normal conditions, the SPO
2
waveform corresponds to (but is not proportional to) the
arterial pressure waveform. The typical SPO
2
waveform indicates not only a good waveform, but
also helps the user find a probe placement with the least noise spikes present. The figure below
represents a good SPO
2
waveform
Good Quality SPO
2
Waveform
If noise (artifact) is seen on the waveform because of poor probe placement, the photo detector
may not be flush with the tissue. Check that the probe is secured and the tissue sample is not too
thick. Pulse rate is determined from the SPO
2
waveform which can be disrupted by a cough or
other hemodynamic pressure disturbances. Motion at the probe site is indicated by noise spikes
in the normal waveform. (See the figure below.) In order to reduce motion noise, you should
carefully look at the SpO2 waveform and check the probe position in the animal.