What is indicated by dull sound percussed over the spleen during a deep breath?

A dull sound percussed over the spleen during a deep breath indicates splenomegaly, which is an enlargement of the spleen. In healthy individuals, the spleen cannot be easily palpated, and percussion over the area typically results in a resonance sound. However, when the spleen is enlarged, it can extend beyond its normal anatomical boundaries, leading to dullness upon percussion due to the increased solid tissue.

This finding can suggest various underlying conditions, including infections, liver diseases, or hematological disorders. As the diaphragm descends during deep breathing, the enlargement can also result in more pronounced dullness, reinforcing the nurse practitioner's suspicion of splenic enlargement. Recognizing splenomegaly is critical, as it may require further evaluation to determine the underlying cause and appropriate management.