Bronchophony and egophony are vocal resonance tests performed when there is an indication of consolidation within the lung. The spoken voice vibrates and transmits sounds through the lung fields. BRONCHOPHONY Instructions to patient: Please, sit down comfortably on the bed. I will stand behind you. Now, I will to listen to your lungs. Please repeat the phrase:” ninety-nine” every time you feel stethoscope on your back. Procedure: Instruct the patient to repeat one of the following phrases:” ninety-nine”, “e-e-e”, or “one-twothree”. While the patient is speaking, use the diaphragm of the stethoscope to systematically auscultate the posterior thorax to listen for the response. Normal findings: The expected result is a muffled tone such as “nin-nin” or muffled “one-two-three”. Abnormal findings: Bronchophony is present and abnormal if the sound is loud and clear as in “ninety-nine”, “onetwo-three” Causes of abnormal findings: Positive bronchophony is present because acoustic filtering is reduced in consolidated lung tissue, which allows better sound transmission. Abnormal bronchophony reveals consolidation which refers to increased density of the lung tissue, due to it being filled with fluid and/or blood or mucus which may indicate pneumonia. Solidification of lung tissue around the bronchi may also indicate lung cancer. However, it may just as well have benign causes, such as wide bronchi. As such, it is usually an indication for further investigation. EGOPHONY Egophony evaluates the intensity of the spoken voice. The word egophony comes from the Greek word for "goat," in reference to the bleating quality of the sound. Instructions to patient: Please, sit down comfortably on the bed. I will stand behind you. Now, I will to listen to your lungs. Please say “e-e-e” when you feel my stethoscope on your back. Procedure: Instruct the patient to say “e-e-e” as you auscultate the posterior thorax. Normal findings: The expected response is the sound of a muffled “e-e-e” Abnormal findings: Positive egophony is present when the intensity and the pitch of the sound changes and is heard as “a-a-a”. Causes of abnormal findings: Positive egophony is indicative of the consolidation of the lung, collapse of the lung, pneumonia, pleural effusion, idiopathic pulmonary fibrosis.

Bronchophony and Egophony

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