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Cataracts or recent eye surgery
* Recent thoracic or abdominal surgery
* Nausea, vomiting, or acute illness
* Recent or current viral infection
* Undiagnosed hypertension

Parameters

The most common parameters measured in spirometry are vital capacity (VC), forced vital capacity (FVC), forced expiratory volume (FEV) at timed intervals of 0.5, 1.0 (FEV1), 2.0, and 3.0 seconds,

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