Lead alert or square wave
A dot might be flashing on the lead-status screen. Or one or more leads might appear as
a square wave.
Causes
• Electrode contact might be poor.
• A lead might be loose.
• A lead might be defective.
Actions
• Replace the electrode.
• Verify that the patient’s skin has been properly prepared.
• Verify that electrodes have been properly stored and handled.
• Replace the patient cable.
Directions for use Troubleshooting 39
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