Inspiratory spirometer: what to know

An inspiratory spirometer is a handheld device that helps you practise a slow deep breath or measure inhaled air, depending on its design. Some devices provide visual feedback as you inhale; others record a measurement for a clinician. It should be used with the instructions supplied for your device or care plan, because technique and purpose vary.

A breathing exerciser can encourage fuller breaths when shallow breathing is a concern, while a measuring spirometer is used during spirometry to assess how air moves in and out of the lungs. Results are interpreted against your symptoms, age, height, and clinical history. A single reading does not establish a diagnosis, and a device reading cannot replace an assessment when breathing is deteriorating.

Sit upright, seal your lips around the mouthpiece, and follow the prescribed breathing pattern. Keep the device clean as directed and do not share a mouthpiece. If you become dizzy, stop and breathe normally. For a measurement, repeat only as instructed rather than chasing a particular number. Ask a clinician to demonstrate the technique if the indicator does not move as expected or you are unsure whether to inhale slowly, forcefully, or deeply.

Seek emergency help for severe breathlessness, blue lips, confusion, collapse, or inability to speak comfortably. Obtain prompt medical advice for new chest pain, coughing blood, faintness, or a clear decline from your usual breathing. A reassuring device reading should not delay care when symptoms are severe. Your clinician can decide whether formal spirometry or another test is appropriate.

Ask what the device is intended to do, how often to use it, and which technique applies. Confirm how to record readings and what change should prompt a call. Ask whether your inhalers or other medicines need adjustment, and whether formal spirometry is needed to investigate ongoing symptoms.