A stethoscope
is a type of medical device, meant to listen to different sounds in the body.
It was invented in 1816 by French doctor Rene Laennec.
Prior to
the stethoscope, doctors used to place their ears against the body of patients
to detect body sounds like heart beat. This was an uncomfortable proposition
for female patients. Nowadays, nurses and doctors utilize stethoscopes to detect
lung, bowel and heart sounds as well as to monitor blood pressure.
·
Heart sounds: When stethoscope is placed against
the chest, many kinds of heart sounds are audible. For instance one can hear
the sound of ventricles and atria contracting. Murmurs of heart due to abnormal
functioning of heart valves can be detected.
· Lung sounds: Lung sounds can be heard when
stethoscope is placed on the chest or back. On taking a deep breath, one can
hear the air entering the lung even while they expand. If crackles are heard,
they indicate abnormalities in the lung, like fluid present in lungs. Wheezing
will be heard if air passages are blocked.
· Bowel sounds: Placing the stethoscope on the
abdomen lets the doctor listen to the sounds of food and liquids, moving from
the stomach to the intestines. In normal case, these are gurgles of low pitch which
can be detected every 5 to 10 seconds. This may become more or less depending
on the patient’s condition.
· Measure blood pressure Stethoscopes are used along with sphygmomanometers
to measure blood pressure. A cuff is wrapped around the arm and inflated and
the stethoscope is used to measure pulse as cuff is deflated.
One can do stethoscope online shopping.
Other types of stethoscopes are:
· Electronic stethoscope: It is used to detect sounds in the
body, not audible through conventionalstethoscopes. It amplifies sounds
emanating from the body by electronic means. It can be a wireless, recording
device and can grant noise reduction as well as signal enhancement.
·
Fetoscope: It has a different shape and is
used to detect sounds coming from the foetus inside the mother. It is placed on
the abdomen of pregnant women.
· Doppler stethoscope: It is an electronic device that
detects the Doppler effect of ultrasound waves emanating from body organs.
· 3D printed: It is a medical device that is
open sourced, aimed at auscultation and created by 3D printing.
These are
some facts about stethoscopes.
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