The Patient Session
3-18 ST80i Stress Test System Instructions for Use
Preparing the Skin
Thorough skin preparation is very important. The skin is a poor conductor of electricity and
frequently creates artifact that distorts the ECG signal. By performing methodical skin
preparation, you greatly reduce the potential for myographic noise and baseline wander,
ensuring high-quality printouts and displayed data. There is a natural resistance on the skin
surface due to dry, dead epidermal cells, oils, and dirt.
To prepare the skin
1
Shave hair from electrode sites, if necessary. Excessive hair prevents a good connection.
2 Wash the area thoroughly with soap and water.
NOTE Do not use alcohol to clean the skin.
3
Dry the skin vigorously with a gauze pad to increase capillary blood flow to the tissues
and to remove the dead, dry skin cells and oil.
4 Use an abrading pad to lightly scratch an “X” pattern into the skin, taking care to avoid
excessive abrading.
Attaching the Electrodes/Lead Wires
Placement of the electrodes changes depending on the stage:
Supine for a resting or baseline ECG
Standing for Exercise Phase
ST80i supports the use of 12-lead wireless PIMs. The 12-lead wireless PIMs connect to the
AIM and support 10 electrodes. Using AAMI/IEC labeling, these electrodes are:
Right Leg [RL/N]
Left Leg [LL/F]
Right Arm [RA/R]
Left Arm [LA/L]
Chest leads [V1/C1, V2/C2, V3/C3, V4/C4, V5/C5, and V6/C6]
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