. Diseases of the dog and their treatment. Fig. 57.—riex-iinetcr. 124 DISEASES OF THE RESPIRATORY ORGANS (Fig. 57). Lay the plate close to the wall of the chest, and, with the hammerin the other hand, strike the plate a number of light, quick taps; the fingerscan also be used, and are preferred by some. Place the index or middlefinger of the left hand firmly on the chest wall, and with the index fingerof the right hand tap on the finger of the left hand. The limits of percussion arc given in Fig. 58, but it must be taken intoconsideration that on expiration the posterior limit of the lungs is
. Diseases of the dog and their treatment. Fig. 57.—riex-iinetcr. 124 DISEASES OF THE RESPIRATORY ORGANS (Fig. 57). Lay the plate close to the wall of the chest, and, with the hammerin the other hand, strike the plate a number of light, quick taps; the fingerscan also be used, and are preferred by some. Place the index or middlefinger of the left hand firmly on the chest wall, and with the index fingerof the right hand tap on the finger of the left hand. The limits of percussion arc given in Fig. 58, but it must be taken intoconsideration that on expiration the posterior limit of the lungs is carriedforward of the dotted line and not extending to the last rib and also thatwhen the stomach or intestines are very much filled with gas, and crowdthe diaphragm forward, the extent of the lungs is lessened. The per-cussion area lies in a triangular space between the lower side of the mus-. FiG. 58.—Field of percussion; x, location of heart beat. cles of the back, the posterior portion of the muscles of the forearm, andthe ends of the ribs, and by pulling the forelegs forward, the extent of thechest wall can be increased for examination. In percussion we make thedistinction between a clear, loud, normal lung sound and a tympanitic,dull, or solid sound of a diseased lung. The clear normal sound of thehealthy lung is heard all over the thorax, the volume of sound dependingon the thickness of the lung at the particular part being examined. Themuscular layers of the chest have a certain effect on the sound, very thickwalls lessening the sound to a certain extent; the soimd is more or lessdull over the shoulder-blade, sterum, and back; the posterior borders ofthe lungs often have no perceptible sound, as they are so thin.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdo, booksubjecthorses
