Connecting and Positioning ECG Electrodes
Correct lead placement is always important for accurate diagnosis.
Especially in the precordial leads, which are close the heart, QRS
morphology can be greatly altered if an electrode is moved away from its
correct location. Each electrode is color-coded. Use the placement diagrams
available on the display of the MX40 and in this section for guidance.
Additional lead placement information is available in the Online Help at the
IntelliVue Information Center.
When placing electrodes on the patient, choose a flat, non-muscular site
where the signal will not be impacted by either movement or bones.
Philips recommends that electrodes be changed every 24 hours.
In addition to correct positioning of the electrodes, optimal skin preparation
prior to electrode placement will help ensure a clear signal for diagnosis.
ECG and Arrhythmia Monitoring
Prepare the patient's skin. Good electrode-to-skin contact is important
for a good ECG signal, as the skin is a poor conductor of electricity.
Select sites with intact skin, without impairment of any kind.
Clip or shave hair from the site as necessary.
Wash site with soap and water, leaving no soap residue.
Note— Philips does not recommend using ether or pure alcohol,
because they dry the skin and increase the resistance.
Use ECG skin preparation paper (abrasive) to remove dead skin
cells and to improve the conductivity of the electrode site.
Check electrodes for moist gel, and attach to the clips. If you are not
using pre-gelled electrodes, apply electrode gel to the electrodes before
Note— Gel must be moist to provide a good signal.
Place the electrodes on the patient according to the lead placement you
have chosen (see the electrode placement diagrams following). Place the
edge down, then "roll down" the rest of the pad. Press firmly around the
adhesive edge toward the center.
Attach the patient cable to the MX40. An ECG waveform and numeric
appear on the monitor display.