ZOLL M Series Defibrillator Rev B Non-Int 12 Lead User Manual

Page 5

Non-Interpretive 12-lead

9650-0218-01 Non-Interpretive

12-lead

Electrode Placement

Location

AHA Labels IEC Labels

Right Arm RA (white)

R (red)

Left Arm

LA (black) L (yellow)

Right Leg RL (green)

N (black)

Left Leg

LL (red)

F (green)

Chest

Place electrodes on the patient. All electrodes must be

connected. Proper skin preparation and use of proper

electrodes are very important for a good signal quality.

If necessary prepare the patient’s skin for electrode

application by ;

• Shaving or clipping excess hair at electrode site . Avoid

placing electrodes over tendons and major muscle

masses.

• Cleaning oily skin with an alcohol pad.
• Briskly rubbing site to dry.

When acquiring 12-lead ECG from quiet supine patients,

ZOLL recommends placing the limb electrodes anywhere

along the ankles and wrists. When it is difficult for the

patient to remain motionless due to shivering, muscle

tremors, or transport vehicle movement, better results are

often obtained if limb electrodes are placed on the patient’s

thorax. (Refer to the two diagrams below for limb electrode

placement).

RA/R

LA/L

RL/N

LL/F

Place the precordial electrodes across the chest in the

following locations;

V1 : Fourth intercostal space, at the right sternal margin.

V2 : Fourth intercostal space, at the left sternal margin.

V3 : Fifth rib, between leads V2 and V4.

V4 : Fifth intercostal space, on the left midclavicular line.

V5 : Left anterior axillary line, at the horizontal level of V4.

V6 : Left midaxillary line, at the same horizontal level as V4

and V5.

Locating the V1 position (fourth intercostal space) is

critically important because it is the reference point for

locating the placement of the remaining V leads. To locate

the V1 position:

1. Place your finger on top of the jugular notch (s ee figure

below).

2. Move your finger slowly downward about 1.5 inches

(3.8 centimeters) until you feel a slight horizontal ridge

or elevation. This is the "Angle of Louis" where the

manubrium joins the body of the sternum.

3. Locate the second intercostal space on the right side,

lateral to and just below the Angle of Louis.

4. Move your finger down two more intercostal spaces to

the fourth intercostal space which is the V1 position.

Note: When placing electrodes on female patients, always

place leads V3-V6 under the breast rather than on the

breast.

Angle of Louis

Jugular notch