Welch Allyn Acuity and Mobile Acuity LT Central Monitoring Systems - User Manual - Manual (Page 175)

Directions for use Chapter 10 Troubleshooting and maintenance 171
To turn on the Acuity System
1. Turn on the power to these components, in this sequence:
a. Acuity System laser printer(s)
b. Terminal server (located in the equipment room)
c. Acuity Central Station display(s)
d. Acuity Central Station computer
The computer power-up process takes several minutes, and several system
messages appear on the screen. The Acuity System logs in and starts up the Acuity
System screen. The map appears and all connected monitors’ map icons show
Unconfirmed Patient ID status or Alarm(s) Off status.
2. For each patient, take these steps:
a. Verify patient information, and then click YES.
b. Check patient alarm limits.
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” on page 92.
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.