Community-acquired pneumonia physical examination

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Chetan Lokhande, M.B.B.S [2]

Overview

Physical examination by a health care provider may reveal fever or sometimes low body temperature, an increased respiratory rate, low blood pressure, a fast heart rate, or a low oxygen saturation, which is the amount of oxygen in the blood as indicated by either pulse oximetry or blood gas analysis. People who are struggling to breathe, who are confused, or who have cyanosis (blue-tinged skin) require immediate attention. A lack of normal breath sounds, the presence of crackling sounds (rales), or increased loudness of whispered speech (whispered pectoriloquy) can identify areas of the lung that are stiff and full of fluid, called "consolidation." The examiner may also feel the way the chest expands (palpation) and tap the chest wall (percussion) to further localize consolidation. The examiner may also palpate for increased vibration of the chest when speaking (tactile fremitus).[1]

Physical Examination

The physical examination, though not very sensitive and specific in diagnosis of community acquired pneumonia, helps in determining the severity of illness and ruling out other differentials. Vital signs are useful in determining the severity of illness and have predictive values. However, a high degree of suspicion should be kept in elderly as the presentation could be subtle in them.

A systematic review summarizes diagnosis[2].

Vital Signs

Lungs

Palpation

  • Increased tactile fremitus

Percussion

  • Dullness on percussion

Auscultation

  • Decreased breath sounds
  • Bronchial breath sounds
  • Rhonchi
  • Crackles, Rales
  • Increased volume of whispered (vocal fremitus).

References

  1. Metlay JP, Kapoor WN, Fine MJ. Does this patient have community-acquired pneumonia? Diagnosing pneumonia by history and physical examination. JAMA 1997; 278:1440. PMID 9356004
  2. Ebell MH, Chupp H, Cai X, Bentivegna M, Kearney M (2020). "Accuracy of Signs and Symptoms for the Diagnosis of Community-acquired Pneumonia: A Meta-analysis". Acad Emerg Med. doi:10.1111/acem.13965. PMID 32329557 Check |pmid= value (help).

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