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The wooden tube (first stethoscope)
In 1816, the Frenchman René Laënec invented a wooden tube which could isolate the noises from the surrounding enviroment and make them louder -
The first practical two-eared stethoscope
The first practical two-eared stethoscope was invented in 1851. Flexible tubing was nedded to make a stethoscope that allowed dectors to use both ears. -
René Laënnec
René Laënnec was born in Bretagne in 1781 and he died in 1826. He was a doctor and he wrote many books about medicine, and he studied many ilnesses, such as tuberculosis he invented the stethoscope in 1816. The reason to invent the stethoscope was that he nedded to hear the noise of people's healts and lungs to cure them -
The stethoscope of nowadays
The stethoscopes used today are very similar to the ones used in the 1930s. New materials such as flexible rubber, stainless steel, and tygon make them lighter and easier to use.
The invention of new materials, such as rubber and stainless and steel, has helped the stethoscope to become a very useful medical instrument.
