ECG Showing 'Leads Off' When Connected to a Patient

If the ECG leads are connected to the patient but no readings appear on the screen, this is often due to poor patient contact which can be caused by expired or improperly stored electrodes.

Tip: Always store ECG electrodes in a sealed, airtight container in a cool, dry place, away from direct sunlight.

Troubleshooting Steps

Check the Clips

• Ensure the clips are clean and free of any excess gel.

Prepare the Skin

• Remove any moisturising cream, deodorant, perfume, or sunscreen that could affect the connection.
• Clean the skin with an alcohol wipe before applying electrodes.
  
• Wait 60 seconds for the skin to dry before reapplying the electrodes.

Check Electrode Placement

• Ensure the electrodes are positioned correctly.
• Lead Placement Guide

  

  
  

  Download a PDF of this guide from ECG Lead Placement Guide-Update 21.pdf
    

Replace the Electrodes

• Open a new pack of electrodes and reapply them to the patient.
• Start with limb leads, then reapply chest leads if needed.

Apply Electrodes Correctly

• Press only the sides when applying the electrodes.
• Do not press the centre, as this can spread the gel and interfere with the connection.

Recommended Electrodes: We suggest using Ambu Blue Sensor SUPATab electrodes (SU-00-C) for the best results. 

Testing for Lead Faults

If you are still unable to obtain a reading after performing these checks, the issue may relate to a fault. To check if the leads are functioning correctly, follow these steps:

• Clip all the leads onto a single, flat piece of conductive metal, such as a breadknife, metal trolley, metal ruler, or kidney dish.
• If the ECG displays a flat-line reading while all leads are clipped onto the metal surface, this confirms that all leads are functioning correctly.
• If no flat-line trace appears, the leads may be faulty. In this case, contact a support technician for further assistance.

Need replacement electrodes? You can purchase them here: https://www.numed.co.uk/products/category/ecg-electrodes