Identifier: physicaldiagnosi12cabo (find matches)
Title: Physical diagnosis
Year: 1912 (1910s)
Authors: Cabot, Richard C. (Richard Clarke), 1868-1939
Subjects: Diagnosis Chest Diagnosis
Publisher: New York : William Wood and Company
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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rominent. The shoulders are high andstooping and the neck is short (see Fig. 188). The patient is oftenconsiderably cyanosed, and his breathing rapid and difficult. In-spiration is short and harsh; expiration prolonged and difficult. Theribs move but little, and, owing to the ossification of their cartilages,are apt to rise and fall as if made in one piece (en cuirasse). Theworking of the auxiliary muscles of respiration is not infrequentlyseen. The diaphragm shadow (Littens sign) begins its excursion oneor two ribs farther down than usual and moves a much shorter distancethan in normal cases. 1 Formed by the junction of the manubrium with the second piece of the sternum. 296 EMPHYSEMA, ASTHMA, PULMONARY SYPHILIS, ETC. 297 Palpation shows a diminution in the tactile fremitus, throughoutthe affected portions; that is, usually throughout the whole of bothlungs. Sometimes it is scarcely to be perceived at all. Percussion yields very interesting information. The diseasemanifests itself—
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Fig 188.—Barrel Chest due to Chronic Bronchitis and Emphysema. (a) By hyper-resonance on percussion, with a shade of tympaniticquality in the note. (6) By the extension of the margins of the lung so that they en-croach upon portions of the chest not ordinarily resonant. The degree of hyper-resonance depends not only upon the degreeof emphysema but upon the thickness of the chest walls. The noteis most resonant and has most of the tympanitic quality when the 298 PHYSICAL DIAGNOSIS disease occurs in old persons with relatively thin chest walls. Theencroachment of the over-voluminous lungs upon the liver and heartis demonstrated by the lowering of the line of liver flatness from itsordinary position at the sixth rib to a point one or two interspacesfarther down or even to the costal margin, while the area of cardiacdulness may be altogether obliterated, the lungs completely closingover the surface of the heart. At the apices of the lungs resonancemay be obtained one or two centimetres

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