Answer to your question about cardiac electrodes is as follows:
2238 and 2223cn are different models of 3M red dot electrodes, 2238 is a solid conductive adhesive soft gauze backing, gentle and breathable, suitable for long-term monitoring and fragile fragile skin; 2223cn is a viscous conductive adhesive foam backing, easy to operate with waterproof, suitable for short-term for short-term monitoring, such as the operating room, emergency room, etc..
If you are interested in further understanding of 3m ECG electrodes, you can call the head office of 3M China Limited at 86-21-62753535 for further consultation.
I hope you are satisfied with the above reply! If you still have questions, please feel free to ask us.