. Fig. 166.—The areas over which auscultation of the chest may be performed, showing their extent, position and relations to the thoracic wall. 1, Upper zone ; 2, middle zone; 8, inferior zone ; 4, subscapular zone. intensity at this point. Towards the upper and lower limits of this zone are found the great bronchial divisions, so that auscultation should always be practised with the greatest care at this point. The middle zone occupies approximately one-third of the total depth of the thorax. The vesicular murmur becomes weaker as one passes backwards, and finally disappears at a considerable
. Fig. 166.—The areas over which auscultation of the chest may be performed, showing their extent, position and relations to the thoracic wall. 1, Upper zone ; 2, middle zone; 8, inferior zone ; 4, subscapular zone. intensity at this point. Towards the upper and lower limits of this zone are found the great bronchial divisions, so that auscultation should always be practised with the greatest care at this point. The middle zone occupies approximately one-third of the total depth of the thorax. The vesicular murmur becomes weaker as one passes backwards, and finally disappears at a considerable distance from the angle of the hypochondrium, following a curved line the convexity of which is directed forwards, and which is continuous with that limiting the upper zone. These peculiarities are due to the anatomical arrangement and mode of insertion of the diaphragm on the internal surface of the hypochondrium.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkwrjenkins
