Question

The normal tone obtained on percussion of the thorax is

Answer 1

The lung is filled with air (99% of lung is air). Hence, percussion of it gives a resonance. This step helps identify areas of lung devoid of air.

Appreciate the dullness of the left anterior chest due to heart and right lower chest due to liver.

Note the hyper-resonance of the left lower anterior chest due to air filled stomach.

Normally, the rest of the lung fields are resonant.

Normal diaphragmatic excursion is 5-6 cm.

Answer 2

Answer:

percussion of thorax is dull