. Diseases of the heart and arterial system; Designed to be a practical presentation of the subject for the use of students and practitioners of medicine. 3.—AUSCCLTATOKV pERCrssluN. Auscultatory or Stethoscopic Percussion.—This is a combina-tion of auscultation Jind percussion, and is based on the princijtlethat when the stroke is iiiade over a solid organ its note is higher, INTRODUCTORY. Fig. 4.—Auscultatory PEKCusiioN. sharper, and more clearly defined tlian when over an air-contain-ing organ. It is found, moreover, that there is a distinct differ-ence in the character of the note of two v
. Diseases of the heart and arterial system; Designed to be a practical presentation of the subject for the use of students and practitioners of medicine. 3.—AUSCCLTATOKV pERCrssluN. Auscultatory or Stethoscopic Percussion.—This is a combina-tion of auscultation Jind percussion, and is based on the princijtlethat when the stroke is iiiade over a solid organ its note is higher, INTRODUCTORY. Fig. 4.—Auscultatory PEKCusiioN. sharper, and more clearly defined tlian when over an air-contain-ing organ. It is found, moreover, that there is a distinct differ-ence in the character of the note of two viscera of similar struc-ture. This is, of course, thesame jDrinciple that underliesplessimetric percussion, but theauscultatory method enablesone to appreciate more delicateshadings of tone and to definemore precisely the deeply situ-ated borders of an organ orsolid thoracic tumour. It evenenables one to distinguish be-tween the dulness of pleuriticor pericardial effusion and thatof a contiguous pulmonary con-solidation. It is practised in either oftwo ways: The examiner maywith one hand hold the bell of his binaural stethoscope against the centre of the cardiacarea, while with the tip of a finger of the disengaged hand hetaps the chest-wall lightly from without inward and on a linewith his stethoscope (Fig. 3), or he may have his instrumentheld by an assistant while he performs p
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