What should you know about the iHealth Air pulse oximeter?

A pulse oximeter uses light through a fingertip to estimate oxygen saturation and pulse rate. It does not measure lung function, carbon dioxide, blood pressure, or the cause of breathing problems. A changing or unexpected reading can reflect movement, cold fingers, nail products, poor circulation, or an imperfect fit.

Look at the reading alongside how you feel. Breathlessness, blue or grey lips, chest pain, confusion, or unusual drowsiness can be serious even when a device reading seems reassuring. Conversely, a single unexpected number without symptoms may need repeating under better conditions rather than immediate self-diagnosis.

Rest quietly, warm your hand, remove anything that interferes with the sensor, and place the device securely on a finger. Keep still and wait for the display to settle before recording the result and pulse. Repeat after a short pause if the reading conflicts with your symptoms, and check the device battery and fit.

Record the time, reading, pulse, symptoms, and activity. Use the same device for trend information, but do not alter prescribed oxygen or other treatment without medical advice. A GP Consultation can help interpret repeated concerns.

Seek urgent medical help for severe or worsening breathlessness, blue or grey lips, chest pain, fainting, new confusion, or inability to speak comfortably because of breathing. Contact a clinician promptly when readings remain unexpectedly low or are falling, particularly if you also feel unwell. Device readings should never delay emergency care.

Ask what readings are expected for you, how often to monitor, how to recognise a faulty measurement, when to call for advice, and whether your medicines or lung condition change the monitoring plan.