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The stethoscope was invented in France in 1816 by René Laennec at the Necker-Enfants Malades Hospital in Paris. [1] [2] [3] It consisted of a wooden tube and was monaural. Laennec invented the stethoscope because he was not comfortable placing his ear directly onto a woman's chest in order to listen to her heart.
René-Théophile-Hyacinthe Laennec [a] (French:; 17 February 1781 – 13 August 1826) was a French physician and musician.His skill at carving his own wooden flutes led him to invent the stethoscope in 1816, while working at the Hôpital Necker. [1]
A Littmann stethoscope. David Littmann (July 28, 1906 – January 1, 1981) was an American cardiologist and Harvard Medical School professor and researcher. [1] The name Littmann is well known in the medical field for the patented Littmann Stethoscope reputed for its acoustic performances for auscultation.
1974: The lithium-ion battery is invented by M. Stanley Whittingham, and further developed in the 1980s and 1990s by John B. Goodenough, Rachid Yazami and Akira Yoshino. It has impacted modern consumer electronics and electric vehicles. [507] 1974: The Rubik's cube is invented by Ernő Rubik which went on to be the best selling puzzle ever. [508]
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Eli Lilly (NYSE:LLY) has become the industry leader in a class of drugs called glycogen-like peptide-1 therapies, or GLP-1, that were developed for treating diabetes, but were shown to have ...
The two dentists were arguing; Dr Ortiz was advocating for braces and veneers in place of Dr Kenny’s cosmetic surgeries. (This conversation resulted in a lawsuit filed by Dr Kenny against Dr Ortiz.)
In 1851, Leared invented the binaural stethoscope, a stethoscope that fits into both ears. His stethoscope was made of gutta-percha and was displayed at the Great Exhibition . [ 2 ]