Ivory and silver pleximeter
Used to locate thoracic lesions by percussion Auenbrugger
Ebony with notches for measurement and ornately-decorated silver handles on either side for easy handling. Leopold Auenbrugger, who reinvented percussion as a diagnostic technique, employed a special instrument called a pleximeter although later most American physicians preferred to use their index fingers to percuss their patients. The pleximeter was held on the skin, and tapped with the hammer (percussor).
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Auenbrugger, Leopold, 1722-1809, “Ivory and silver pleximeter,” Digital Collections - University at Buffalo Libraries, accessed November 27, 2020, https://digital.lib.buffalo.edu/items/show/16852.