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USER MANUAL
Railed Signals - User Actions:
1] When you see this characteristic shape, you generally only need to wait for the controller to
optimize the signals to back them off of the rail.
2] If the controller takes an inordinately long time, or you are very impatient, you can press the
“Start/Reset” button. This resets the controller to the start condition, which can allow the signals
to be optimized more quickly.
3] Make sure that the Creature Comforter™ and/or Light-Blocker are in place.
10.2.2.3. Motion Artifact
One of the primary problems with measuring parameters in un-anesthetized animals is motion artifact,
although you can also get breathing-derived body motion to cause motion artifact in anesthetized animals.
Arterial saturation measurements made from pulse oximetry are extremely susceptible to motion of the
sensors. Even with the slightest, nearly imperceptible motion, oximetry measurements are rendered
undoable. Some samples of bad signals due to motion artifact are presented here.
Motion artifact is generally characterized by the following:
1] Large random oscillations that are mostly in phase.
2] Often, an underlying normal signal is present but is riding on top of large oscillations.
3] The frequency of these oscillations will be lower than the prevailing heart rate.
Motion Artifact - User Actions:
1] If the animal is anesthetized and is moving or twitching, you should try increasing the
anesthesia level, but keep an eye on the SpO2.
2] If the animal is anesthetized and is apparently not moving, you may be getting motion of the
clip associated with body motion resulting from breathing effort. If this is the case, you should try
P/N 100017, Rev. 5.2.4
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