Parameter Menus Operations
2 - 20 0070-10-0666-01 Trio™ Operating Instructions
Modified Chest Lead (MCL) Monitoring
FIGURE 2-22 MCL Monitoring with a
3-wire Lead Set (AHA)
FIGURE 2-23 MCL Monitoring with a
3-wire Lead Set (IEC)
• Place the RA (white) electrode under the 
patient’s left clavicle, at the mid-
clavicular line within the rib cage frame.
• Place the LA (black) electrode on the 
right sternal border, at the fourth 
intercostal space within the rib cage 
frame.
• Place the LL (red) electrode on the 
patient’s lower left abdomen within the 
rib cage frame.
Select ECG Lead I for MCL
1
 monitoring. 
Lead I is the direct electrical line between 
the RA (white) electrode and the LA (black) 
electrode.
Select ECG Lead II for MCL
6
 monitoring. 
Lead II is the direct electrical line between 
the RA (white) electrode and the LL (red) 
electrode.
• Place the R (red) electrode under the 
patient’s left clavicle, at the mid-
clavicular line within the rib cage frame.
• Place the L (yellow) electrode on the 
right sternal border, at the fourth 
intercostal space within the rib cage 
frame.
• Place the F (green) electrode on the 
patient’s lower left abdomen within the 
rib cage frame.
Select ECG Lead I for MCL
1
 monitoring. 
Lead I is the direct electrical line between 
the R (red) electrode and the L (yellow) 
electrode.
Select ECG Lead II for MCL
6
 monitoring. 
Lead II is the direct electrical line between 
the L (red) electrode and the F (green) 
electrode.
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