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13912-101 Rev. B
During the measurement process, the AT555 may detect a condition that could create a low
confidence reading, which is identified with an asterisk after the reading.
Asterisk readings can result from an untimely blink or interference from a patient’s eyelashes.
These measurements are highlighted with an asterisk next to the reading as shown below.
Note: If a reading has an asterisk following it, that reading will be used in the computation
of the average value. If a fourth measurement is taken, the AT555 will replace the
asterisk reading with the new reading.
Instructions for Use (Continued)
Low Confidence Readings
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