Auscultation and percussion : together with the other methods of physical examination of the chest / by Samual Gee.

  • Gee Samuel Jones, 1839-1911.
Date:
1907
Catalogue details

Licence: In copyright

Credit: Auscultation and percussion : together with the other methods of physical examination of the chest / by Samual Gee. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    to pass through the solid walls of the chest. Yet liquid is a good conductor of sound: over a serous pleural effusion we may sometimes hear accidental bronchophony so clear that we can distinguish any number the patient speaks. Nevertheless the bronchophony often becomes weakened and muffled. Moreover, it sometimes becomes changed in quality by passage through the pleural fluid, that is to say, it becomes ^go- phonic or amphoric, according as the fluid is liquid or aerial. ii. Increased Reflection.—The voice is con- veyed along and within the air tubes, by constant reflection of its sound-waves. In the spongy structures reflection ceases, so far as the human ear is concerned. But if they be re- placed by a cavity, not beneath the bronchia in reflectiug power, bronchophony will take the place of a muffled vocal resonance. If the cavity be large, and its inner surface apt for reflection, the bronchophony ( reverbs a hollowness ) acquires a prolonged hollow and reverberating character. Accidental Bronchophony is oftentimes clearer than the natui'al bronchophony heard over the upper dorsal vertebrge, sometimes clearer than the tracheophony heard just above the sternum,