Low signal quality

Aidlab measurements can be affected by fit, skin contact, movement, and nearby sources of interference. If signal quality is low, check the factors below:

• Motion artifact. Movement can stretch the skin and change the electrical signal measured by the electrodes.

• Muscle artifact. Generated by skeletal muscles.

• Dry skin. If your skin is very dry, it may conduct the signal poorly. This can make some signals unreadable.

• Other devices. Holding powered electronic devices or standing close to a strong magnetic field can affect Aidlab readings. ECG signals are small and can be disrupted by stronger external signals.

• No skin contact. Electrodes must touch the chest. Aidlab can have trouble measuring ECG or respiration if hair, dirt, mud, or fabric sits between the sensor and the skin.

• Electrostatic artifact. When an electrostatically charged person moves near the patient or ECG device, currents flow through the high resistance of the stratum corneum (top skin layer) and generate a voltage.

Signal quality

Since Aidlab 2.3, the app can show measurement quality information. When ECG signal quality drops to a level where the result is inconclusive, the app shows a warning: