A practical treatise on medical diagnosis : for students and physicians . ase, tinea versi-color, and, along with other non-specific eruptions, is the seat of suda-mina. The veins over the surface of the chest should not be verydistinct. They are distinct when there is interference with the circula-tion in the mediastinum by aneurism or morbid growths obstructing theveins. The capillaries along the base of the chest are often enlarged ormore distinct than usual and arranged in a bow corresponding to theattachment of the diaphragm. This bow is frequently seen in intra-thoracic obstruction. CEde
A practical treatise on medical diagnosis : for students and physicians . ase, tinea versi-color, and, along with other non-specific eruptions, is the seat of suda-mina. The veins over the surface of the chest should not be verydistinct. They are distinct when there is interference with the circula-tion in the mediastinum by aneurism or morbid growths obstructing theveins. The capillaries along the base of the chest are often enlarged ormore distinct than usual and arranged in a bow corresponding to theattachment of the diaphragm. This bow is frequently seen in intra-thoracic obstruction. CEdema or subcutaneous emphysema occurs asindicated under general inspection. If there is too much fat over the sur-face of the chest, the muscles may want tone, and an estimation, therefore,of respiratory capacity can be made. Wasting of the fat and musclesis seen in phthisis, carcinoma, diabetes, muscular atrophy and paralysis. The Shape and Size op the Chest. We appreciate the shape ofthe chest in health by an estimation of the relations of the antero-posterior Fig. 33,. Transverse section of healthy adult chest upon level of sterno-xiphoid = 89 centimetres. (Dr. Gee.) and the transverse diameters and by the shape of the transverse sectionof the chest. The latter is an ellipse, and has been described as reniform DISEASES OF THE LUNGS AND PLEURJ1. 231 (see Fig. 33). The antero-posterior diameter is about one-third lessthan the transverse. Measurement with the cyrtometer (see Mensura-tion) verifies the result of inspection with mathematical precision. Inchildren a transverse section is different. It is more circular, and theantero-posterior and transverse diameters are almost equal. (See ) Marked deviations from such section, or in the relations of thediameters, are seen in abnormal types of chest. Fig. 34.
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