Leopold Auenbrugger was a Viennese physician who invented percussion, the technique of tapping the chest to diagnose diseases of the lungs and heart. Published in 1761 in a slim Latin treatise titled Inventum novum, the method was largely ignored for nearly fifty years until the French physician Corvisart translated and championed it. Percussion became one of the foundational techniques of physical diagnosis and remains in clinical use today. Auenbrugger’s story is a case study in how medical innovations can languish when the theoretical framework needed to appreciate them has not yet been accepted.
Life and Education
Sigerist notes that Vienna had a pattern of producing physicians of genius outside its official faculty, and Auenbrugger was a case in point.(Henry E. Sigerist, 1933) He was a pupil of Gerhard van Swieten and served as first assistant physician and then physician at the Spanish hospital in Vienna from 1751 to 1762.(Henry E. Sigerist, 1933) He was the son of an innkeeper, a biographical detail that Sigerist connects to the physical basis of his discovery: a man who wishes to know whether a barrel is full or empty taps it, and the human thorax is in many respects like a wine barrel.(Henry E. Sigerist, 1933)
Auenbrugger was also a devoted amateur musician. Musical performances were frequently held in his house, and he wrote the libretto to a comic opera by Salieri. Sigerist notes that persons with a good musical ear learn percussion and auscultation far more speedily than those without musical gifts, and suggests this aptitude was not incidental to Auenbrugger’s medical innovation.(Henry E. Sigerist, 1933)
The Anatomical Problem
The more medical thinkers inclined toward anatomical pathology, the plainer it became that diseases have organic seats and that anatomical changes play a decisive part in producing disease. The demand grew for a method of perceiving these changes not only on the post-mortem table but in the living patient.(Henry E. Sigerist, 1933) Percussion was Auenbrugger’s answer to this demand.
Medical Contributions
Auenbrugger experimented with percussion for seven years before publishing his findings on New Year’s Eve 1760 as Inventum novum ex percussione.(Henry E. Sigerist, 1933) His preface anticipated the resistance to come: he claimed no ambition beyond observation, acknowledged remaining defects in the method, and warned that it had always been the fate of those who improved the arts and sciences to be beset by envy, malice, hatred, detraction, and calumny.(Henry E. Sigerist, 1933)
He distinguished three percussion tones corresponding to aerated, consolidated, and solid tissue: normal pulmonary resonance, dullness on percussion resulting from consolidation by morbid secretions, and the higher-pitched tone produced by percussing over solid structures. These remain the chief percussion categories in clinical practice.(Henry E. Sigerist, 1933)
Ackerknecht notes that Auenbrugger’s Inventum novum (1761) was largely ignored during its author’s lifetime, but is now regarded as a landmark contribution.(Ackerknecht, 1955) Corvisart perceived the value of Auenbrugger’s method, practiced and taught it, and translated the Inventum novum into French in 1808.(Bynum, 1994)
Reception and Resistance
The initial reception of Auenbrugger’s work was hostile or indifferent. Many doctors ignored it entirely; others claimed it was unoriginal, already present in the Hippocratic writings; still others regarded percussion as needless molestation of the sick. Most distressing to Auenbrugger was the contemptuous silence of Anton de Haen, who was hostile to innovations and refused to acknowledge the discovery. De Haen’s cold silence delayed the adoption of percussion at the very institution where it might have been most quickly proven.(Henry E. Sigerist, 1933) Yet the book was widely enough read to warrant a second edition within two years, and Haller praised percussion as worthy of close attention and an entirely new discovery.(Henry E. Sigerist, 1933)
After de Haen’s death, when Maximilian Stoll became chief of the clinic, percussion was more widely practiced there. But when Stoll’s course was run the method passed for a time into oblivion. It was left for French physicians in the beginning of the nineteenth century to recognize that percussion was one of the most important methods of examination of the sick.(Henry E. Sigerist, 1933)
Foucault argues that a forty-year period of latency separated Morgagni’s pathological anatomy from its clinical application.(Foucault, 1963) The real obstacle was not religious prohibition but a period of clinical thought that was structurally foreign to anatomical investigation.(Foucault, 1963)
Significance
Sigerist draws a striking parallel between Auenbrugger and Morgagni: both published landmark works in 1761, and both were expressions of the same advancing anatomical idea. Morgagni laid the foundations of pathological anatomy; Auenbrugger laid the foundations of anatomical diagnosis.(Henry E. Sigerist, 1933)
Scholarly Assessment
Auenbrugger’s story is regularly cited as a case study in how medical innovations can languish when the theoretical framework needed to appreciate them has not yet been accepted. His forty-year eclipse was not primarily the result of hostility or incompetence but of a conceptual mismatch: percussion required the localized disease concept that pathological anatomy was only then establishing. Foucault’s analysis of the gap between Morgagni’s pathological anatomy and its clinical application provides the theoretical frame for understanding why Auenbrugger’s technique was simultaneously correct and premature.(Foucault, 1963) The coincidence of the 1761 publications of Inventum novum and De sedibus is almost too neat, but Sigerist’s parallel captures something real about the relationship between theory and technique in the history of diagnosis. Ackerknecht’s narrative confirms the standard account: the technique waited for Corvisart, and through Corvisart it reached Laennec, whose stethoscope completed the revolution in physical diagnosis that Auenbrugger had begun.(Ackerknecht, 1955)
See Also
- giovanni-battista-morgagni — whose De sedibus appeared the same year as Inventum novum
- gerhard-van-swieten — Auenbrugger’s teacher at Vienna
- anton-de-haen — whose silence greeted Auenbrugger’s discovery
- maximilian-stoll — who revived percussion at Vienna after de Haen’s death
- diagnosis; the broader history of diagnostic methods
- pathological-anatomy; the theoretical framework percussion required
Sources
All claims cite evidence cards from:
- Sigerist, H. E. (1933). The Great Doctors. Trans. E. and C. Paul. New York: W.W. Norton. [Source ID: sigerist-greatdoctors-1933]
- Ackerknecht, E. H. (1955). A Short History of Medicine. New York: Ronald Press. [Source ID: ackerknecht-shorthistory-1955]
- Bynum, W. F. (1994). Science and the Practice of Medicine in the Nineteenth Century. Cambridge University Press. [Source ID: bynum-science-practice-1994]
- Foucault, M. (1963). The Birth of the Clinic. Trans. A. M. Sheridan Smith. New York: Vintage. [Source ID: foucault-birthclinic-1963]