The Curbsiders Internal Medicine Podcast

#236 Approach to Shortness of Breath: Physical Exam Series

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Oct 12, 2020
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INSIGHT

Value of Observation in SOB Exam

  • Observation and simple maneuvers like assessing respiratory rate and asymmetric chest wall expansion are often more informative than jumping straight to auscultation.
  • These signs can reveal serious conditions like pneumothorax before confirmatory imaging is available.
INSIGHT

Likelihood Ratios of Lung Sounds

  • Reduced breath sounds strongly suggest pleural effusion with a positive likelihood ratio of 6.5.
  • Wheezing is a significant predictor of asthma (LR 6.0) and COPD (LR 2.6) but less helpful for pneumonia diagnosis.
INSIGHT

High-Value Physical Exam Maneuvers

  • High-yield physical exam maneuvers involve visual, palpation, and dynamic tests rather than auscultation.
  • Maneuvers like asymmetric chest expansion (LR 44 for pneumonia) and hepatojugular reflux (LR 8 for heart failure) greatly change diagnostic probability.
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