What should you know about an electronic spirometer?

An electronic spirometer measures airflow and lung volumes during forceful breathing into a mouthpiece. The device records your efforts; a clinician interprets the pattern with your symptoms, examination, and other results.

You will be asked to seal your lips around a clean mouthpiece, breathe in fully, and blow out as hard and as long as instructed. Several attempts may be needed so the clinician can assess consistency. Results can help explore conditions that narrow the airways or reduce the amount of air the lungs can hold, but they do not provide a diagnosis on their own.

Follow the clinic's instructions about eating, smoking, exercise, and inhalers before the appointment. Wear comfortable clothing and tell the clinician if you feel unwell or cannot perform a strong blow. Coughing, chest discomfort, or light-headedness can occur during effort; pause and report these symptoms so the test can be managed safely.

Get urgent help for severe breathlessness, blue or grey lips, fainting, chest pressure, or confusion. Contact your clinician if breathing is worsening, you need reliever treatment more often than advised, or you remain unwell after testing. Do not wait for a spirometry appointment when breathing difficulty is severe or sudden.

Ask what each measured value represents, whether your effort was adequate, whether medicine was used before or after the test, and when the result will be reviewed. Ask what symptoms should prompt earlier help while you wait for an interpretation.