STETHOSCOPE
- Anand (a2a)
- Aug 31, 2020
- 2 min read
INTRODUCTION
It is invented by the French physician R.T.H Laennec in 1819 then Later not until 1851 there was a major improvement which was to make the device binaural device by Irish physician Arthur leared.
During the 1900’s binaural stethoscope commonly used as the diagnostic instrument. Till now there are many minor improvements that are made to this device to reduce weight, improve acoustic quality, and filter out noise.
DEFINITION OF STETHOSCOPE
It is an acoustic medical device for auscultation or listening to the internal sounds made by the heart, lungs, or intestines as well as blood flow in arteries and veins.human body.
PARTS OF STETHOSCOPE
Earpieces- used to hear the sound accurately by attenuating outside noise.
Diaphragm- used to detect the high-frequency sounds
Bell- used to detect the low-frequency sounds
Chest piece- also knowns as head
Stem- connects the chest piece to the stethoscope tubing
WORKING
The disc and the tube of the stethoscope amplify small sounds such as the sound of the patient's lungs, heart, and other sounds inside the body.
The amplified sounds travel up the stethoscope’s tube to the earpieces that doctors listen through.
TYPES
You may wonder whether there are different types of stethoscope because it almost looks the same when viewed physically, but there are different types of stethoscopes.
Cardiology stethoscope
It looks like a regular stethoscope but it differs from the acoustic quality.
It has the ability to hear both low and high-frequency sounds from the diaphragm.
Infant stethoscope
It looks like neonate and pediatric stethoscope
The diameter of the infant stethoscope differ from regular which is around 2.6cm
Neonatal stethoscope
It is mostly like an infant stethoscope but it has the smallest diameter of about 2cm because it is used for newborn patients.
Electronic stethoscope
It helps to solve the sound problem by amplifying the sound that is obtained from the chest piece electronically and then it converts into the electric waves that are transmitted through a particular circuit and then proceed for better listening.
These type of stethoscope has two categories they are,
Amplifying - increasing the strength of a sound.
Digitizing - conversion of signal data from analog to digit
PRICING
Cost of the stethoscope in India varies from ₹250 to ₹50k
Popular stethoscope brands
3M Littman classic III stethoscope
MDF Rose gold MD
UNNOTICED THING:
How long is a normal stethoscope?
The length stethoscope varies according to its usage
For cardiology – 22inch or 27inch
Classic stethoscope - 28 inch
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