<unk>  <unk>  is a complete evaluation of the respiratory system including patient history, physical examinations, and tests of<unk><unk> . The primary purpose of<unk>  is to identify the severity of<unk>  impairment.<unk>  has diagnostic and therapeutic roles and helps clinicians answer some general questions about patients with lung disease.<unk> s are normally performed by a respiratory therapist, respiratory physiologist, physiotherapist, pulmonologist, and/or general practitioner.
Pulmonary function testing
Bronchial challenge test
Lung biopsy
Structured light plethysmography
Spirometry
Post bronchodilator test
Bronchial brushing
Air displacement plethysmography