User's Manual

Electrode Placement NetGuard Device
2 - 2 0070-10-0678-01 NetGuard™ Operating Instructions
2.1.2 Skin Preparation
Proper skin preparation is essential to obtain accurate ECG data. Electrode sites should be
clean, dry and should provide a smooth flat surface. Incidental electrical activity and
inaccurate readings may occur due to incorrect skin preparation.
The following skin preparation is recommended for secure patch application:
1. Shave the chest hair in a 2-4 inch diameter of the electrode site.
2. Use a dry gauze pad to remove excess skin oils, skin cells and residue from the
electrode sites. Never rub the skin until it is raw or bleeding.
NOTE: Prepare the electrode site with alcohol only if the skin is
extremely greasy. If alcohol is used as a drying agent,
always allow the skin to dry before placing the electrode
patch on the skin.
2.1.3 CM5 Vector
The CM5 lead provides the best overall view of myocardial activity among the single vectors
available from such an electrode system. Unlike the conventional V-leads obtained with a 5
or 12-lead system, the CM5 vector does not require placement of limb electrodes over the
patient’s upper chest or arm muscles, thereby avoiding the chance introduction of artifact due
to arm motion.
The CM5 lead uses one active electrode over the sternum and another at the V4 location.
The active electrode over the sternum is a dual electrode, consisting of an active element and
a reference element.
FIGURE 2-1 Electrode Placement
A second electrode is attached below the patient’s left nipple (shown in FIGURE 2-1),
between the conventional V4 and V5 positions. Therefore the resulting vector is intermediate
between CM4 and CM5.
NOTE: NetGuard uses standard solid-gel monitoring electrodes.