Editing Spirometry (section)

===Contraindications===
Forced expiratory maneuvers may aggravate some medical conditions.<ref>{{cite book|last1=Clark|first1=Margaret Varnell|title=Asthma: A Clinician's Guide |url=https://archive.org/details/asthmaclinicians00clar|url-access=limited|date=2010|publisher=Jones & Bartlett Learning|location=Burlington, Ma.|isbn=978-0763778545|page=[https://archive.org/details/asthmaclinicians00clar/page/n62 46]|edition=ist}}</ref> Spirometry should not be performed when the individual presents with:
* [[Hemoptysis]] of unknown origin
* [[Pneumothorax]]
* Unstable cardiovascular status ([[angina]], recent [[myocardial infarction]], etc.)
* Thoracic, abdominal, or cerebral [[aneurysms]]
* [[Cataracts]] or recent eye surgery
* Recent thoracic or abdominal surgery
* [[Nausea]], [[vomiting]], or acute illness
* Recent or current viral infection
* Undiagnosed [[hypertension]]