Bronchophony
Summary
Bronchophony is exaggerated transmission of spoken voice sounds through consolidated lung, heard as louder and clearer speech on auscultation. Indicates lung consolidation.
Detail
Bronchophony is detected when spoken voice is transmitted much more loudly and clearly through consolidated tissue compared to normal lung. It is elicited by having the patient say 'ninety-nine' and noting clarity differences. Has good specificity (~85%) but moderate sensitivity (~40-50%) for pneumonia. Absent in pleural effusions, pneumothorax, and emphysema. When present alongside egophony and whispered pectoriloquy, bronchophony strongly suggests pneumonic consolidation.
Sources
- First Aid for the USMLE Step 1
- Pathoma
- Bates' Guide to Physical Examination
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