Welch Allyn Acuity Directions For Use Manual page 67

Directions for use
Initiate relearn of a patient's ECG rhythm
Description of the relearn function
Relearn is an Arrhythmia Analysis function that causes the Acuity system to relearn a
patient's normal ECG rhythm. The Acuity System uses the relearned rhythm as a guideline
to identify arrhythmia events (arrhythmia relearn) and to analyze deviation of the
ECG ST-segment offset (ST relearn).
When relearn occurs for a patient
Both arrhythmia and ST relearn events occur after these things:
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Only an arrhythmia relearn event occurs after these things:
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What occurs in a patient's windows during and after a relearn event
• Virtual Monitor and Waveform Window: A visual RELEARN alert occurs, HR is taken
from the patient monitor instead of from the arrhythmia software, and real-time
waveforms display as usual.
• ST Analysis Setup window: The waveform slice displays NO VALID BEATS, and the
Acuity System can take up to 30 seconds to update the waveform.
• Most review windows and some printouts: Relearn and Learning Done event markers
(▼) appear.
ST/Arr Relearn is clicked in the Arrhythmia Alarms Setup window.
Single ECG is clicked in the Arrhythmia Alarms Setup window
Patient connection, some lead changes or lead failures, system restart
RELEARN is clicked in the Arrhythmia Alarms Setup window. A RELEARN button
(instead of an ST/Arr Relearn button) indicates that the system does not include
the ST Analysis option.
Analyze Pacers is clicked in the Arrhythmia Alarms Setup window. ST Analysis is
disabled when Analyze Pacers is enabled.
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.
Chapter 4 Adjust monitoring settings and patient information 63