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24 Chapter 2 Monitoring Welch Allyn Micropaq Monitor
3-Lead ECG application with the 5-Lead ECG cable
You can perform 3-lead ECG monitoring in a similar manner as 5-lead ECG monitoring. You
may use the 5-lead ECG cable with detachable electrode lead wires, and connect only the
lead wires and electrodes for RA, LA, and LL. Refer to the Welch Allyn Product and
Accessories booklet (810-0409-XX) for part numbers.
Follow these steps:
1. Pe r f o r m Step 1 through Step 4 on page 23 as described for 5-lead ECG monitoring.
2. Before attaching electrodes to the patient, attach only lead wires for RA, LA, and LL to
the 5-lead ECG trunk cable and to the electrodes. Make sure that lead wires for C and
RL are DETACHED from the 5-lead ECG trunk cable.
3. Apply the electrodes for RA, LA, and LL to the patient in the proper locations.
The monitor displays the chest diagram with two circles blinking confirming that the C
and RL electrodes are not connected.
4. Observe the monitor and visually confirm that within about 30 seconds, the two
circles disappear and the monitor displays the ECG waveform, heart rate, and other
patient data.
Be aware that if you connect the C or RL lead wires to the 5-lead ECG trunk cable and
apply the C or RL electrodes to the patient, the monitor defaults to 5-lead ECG
monitoring and does not enable 3-lead ECG monitoring. To enable 3-lead ECG
monitoring, you must disconnect the ECG cable from the monitor for a few seconds,
and then begin this procedure again.
Note
Be aware that there are some inherent limitations with this application,
especially when compared to 5-lead ECG monitoring. These limitations include
the restriction to only one displayed lead, ECG lead II. Because only one
displayed lead is available (ECG lead II), factors such as a poor electrode
connection at RA, LA, or LL can significantly affect performance. To overcome
these limitations, the 5-lead ECG monitoring is preferred.
The monitor’s 3-lead ECG monitoring is only available for use with Acuity
software versions 6.1 or later.