. Clinical diagnostics of the internal diseases of domestic animals. Veterinary medicine; Diagnosis, Veterinary; Veterinary medicine. DETERMINING THE STATUS PRAESENS. 25 The pleximeter and hammer (plexor) are most commonly used in practice [so-called mediate percussion] as they permit not only of gentle percussion but the part to be examined can be struck a heavy blow which sets deep-lying parts into vibration. The plex- imeter should be so held that its whole surface is in firm contact with the part be percussed. In thin animals the pleximeter should never be applied across two ribsr but shou
. Clinical diagnostics of the internal diseases of domestic animals. Veterinary medicine; Diagnosis, Veterinary; Veterinary medicine. DETERMINING THE STATUS PRAESENS. 25 The pleximeter and hammer (plexor) are most commonly used in practice [so-called mediate percussion] as they permit not only of gentle percussion but the part to be examined can be struck a heavy blow which sets deep-lying parts into vibration. The plex- imeter should be so held that its whole surface is in firm contact with the part be percussed. In thin animals the pleximeter should never be applied across two ribsr but should be made to occupy an inter- costal space that the air between it and the body does not modify the sound. The force with which we use the hammer depends upon the thickness of the walls of the part percussed. [In fat animals it is necessary to use more force than in lean ones.] Usually two or three strokes, not too close together, suffice to bring out clearly the character of the sound. For comparison it is advisable to percuss corresponding parts on each side of the body. For a better conception of the percussion-sound it is advisable to select a suitable place. A room with closed doors is the best; in rooms filled with furniture, or out of doors the application of per- cussion is never satisfactory. As a rule large animals are percussed while standing, though small ones may be placed in a recumbent position upon a table. Al- though gentle animals may stand quietly during the operation, very nervous horses or stubborn cows sometimes resist. They can gen- erally be quieted by speaking to them in an assuring tone and by omitting all rough usage of the instruments. 'Dogs and cats may be held by their owners or an attendant. ---j The Qualities of Percussion-Sounds. A body can only then produce a sound when it has lost its equilibrium and vibrates by virtue of its elasticity. Two principles form the basis of percussion: 1. Solid, airless parts of the body give forth a flat sound o
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