Editing Pneumonia (section)

===Physical exam===
[[Physical examination]] may sometimes reveal [[hypotension|low blood pressure]], [[tachycardia|high heart rate]], or low [[Oxygenation (medical)|oxygen saturation]].<ref name=Clinic2011/> The respiratory rate may be faster than normal, and this may occur a day or two before other signs.<ref name=Clinic2011/><ref name=M32/> Examination of the chest may be normal, but it may show decreased expansion on the affected side. Harsh breath sounds from the larger airways that are transmitted through the inflamed lung are termed [[bronchus|bronchial]] breathing and are heard on auscultation with a stethoscope.<ref name=Clinic2011/> Crackles (rales) may be heard over the affected area during [[inhalation|inspiration]].<ref name=Clinic2011/> [[Percussion (medicine)|Percussion]] may be dulled over the affected lung, and increased, rather than decreased, [[vocal resonation|vocal resonance]] distinguishes pneumonia from a [[pleural effusion]].<ref name=BMJ06/>