Welch Allyn Acuity Directions For Use Manual page 82

78 Chapter 4 Adjust monitoring settings and patient information
WARNING In Acuity Systems that include an Arrhythmia option, a relearn
function causes the system to learn a patient's normal ECG rhythm. If the
system learns an abnormal rhythm or learns a rhythm during noise, it designates
the learned rhythm as a normal. Thereafter, rhythms of this type might not trigger
an alarm.
A relearn event can be initiated by a user or by the system. System relearns are in
response to these circumstances:
• Patient connection
• Lead change or failure
• System restart
During an arrhythmia relearn event, the system posts a RELEARN alert in the
patient's Virtual Monitor and Waveform Window. Carefully observe a patient
during an Acuity System learning period. During learning, the system detects
only VFib and asystole arrhythmias.
After a relearn event, "Relearn" and "Learning Done" event markers (▼) appear in
most of the patient's review windows and some printouts. After relearn, carefully
evaluate the new ECG rhythm and the current ST segment for all active leads to
ensure that the system learned an appropriate rhythm. For evaluation
instructions, see "To respond to a RELEARN alert"
WARNING Minimize patient movement during a RELEARN, as movement
creates noise during the reading. If the system learns an abnormal rhythm or
learns a rhythm during noise, it designates the learned rhythm as normal.
Thereafter, rhythms of this type might not trigger an alarm. Ensure that the
patient remains still for 5 minutes after the RELEARN before allowing them to
move.
Welch Allyn Acuity Central Monitoring System
on page 92.