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Tympanic (percussion note)
Loud, high-pitched, drumlike. Normal over stomach/intestines. Abnormal in chest → pneumothorax.
Hyperresonant (percussion note)
Very loud, lower-pitched, booming. Abnormal in adults. Seen in emphysema, asthma, pneumothorax (trapped air).
Resonant (percussion note)
Moderate, low-pitched, hollow. Normal over healthy lungs.
Dull (percussion note)
Soft, thudlike, muffled. Suggests fluid/solid replacing air → pneumonia, pleural effusion, tumor.
Flat (percussion note)
Very soft, high-pitched, extremely dull. Normal over bone or muscle. Abnormal → large pleural effusion.
Tactile Fremitus
Vibration felt on chest wall when patient speaks (“99”). ↑ with pneumonia (consolidation). ↓ with pleural effusion, pneumothorax, COPD.
Rhonchal Fremitus
Vibrations felt from air moving through mucus in large airways. Seen in bronchitis or airway secretions (may clear with coughing).
Pleural Friction Fremitus
Coarse, grating vibration on chest wall. Caused by inflamed pleural surfaces rubbing (pleuritis/pleurisy).