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2 - 16 0070-10-0666-01 Trio™ Operating Instructions

2.4.1.3 Lead Placement

The computerized arrhythmia algorithm works best when the patient’s R wave is significantly

larger than the P wave or the T wave. If the R wave is not significantly larger than other lower

voltage waves on the ECG tracing, the computer may have some difficulty in identifying the

appropriate waves. On some patients, electrode patch placement and/or the viewed ECG

lead may need to be adjusted in order to obtain a significant R wave.

This section outlines lead placement according to the guidelines of the American Heart

Association (AHA) and the International Electro-Technical Commission (IEC).

Standard 3-wire Lead Sets

Standard 3-wire lead sets include 3 ECG leads (I, II and III). Only 1 lead is monitored.

FIGURE 2-14 3-wire Lead Placement

(AHA)

FIGURE 2-15 3-wire Lead Placement

(IEC)

• Place the RA (white) electrode under the

patient’s right clavicle, at the mid-

clavicular line within the rib cage frame.

• Place the LA (black) electrode under the

patient’s left clavicle, at the mid-

clavicular line within the rib cage frame.

• Place the LL (red) electrode on the

patient’s lower left abdomen within the

rib cage frame.

• Place the R (red) electrode under the

patient’s right clavicle, at the mid-

clavicular line within the rib cage frame.

• Place the L (yellow) electrode under the

patient’s left clavicle, at the mid-

clavicular line within the rib cage frame.

• Place the F (green) electrode on the

patient’s lower left abdomen within the

rib cage frame.

White

Black

Red

Yell ow

Green

Mindray Trio Operating Instructions

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