Stethoscope strong> is a medical instrument that can be used to acoustically examine the conditions of the respiratory, circulatory and digestive systems. The stethoscope was first made in 1816 by the French physician Rene Laennec strong>, in the form of a hollow wooden cylinder that transmits the sounds from the lungs to the doctor’s ear.
Through the first stethoscope invented by Rene Laennec strong>, the physician could have a great deal of knowledge about the severity of the lungs of his patients’ lungs. Towards the end of the nineteenth century, the stetescopes we know today were developed. These came from the rubber tube system, which transmitted the voices perceived by a piece that could be carried on the chest to the ear in the doctor’s ear. Stethoscopes are used as the first and simplest instrument that doctors can use in heart and lung examination.
Scientists have had an idea about heart beats from a long time ago. B.C. In 400, Hippocrates likened the voices coming from the heart to the vinegar boiling in the rib cage.
Who invented the Stethoscope? h2>
In 1816, William Harvey described this voice as a gleam of water flowing out. Rene Theophile Hyancinthe Laennec strong> rolls the paper to the heart of the patient and the other end to his ear and listens to his heart. Soon after, he took a tube of roll paper, which was the beginning of the stethoscope. The Greek word stethoscope; stethos (chest) and skopein (gaze). Experiments were carried out with various materials in order to become the present day. Best sound transmission, 30 cm. lt; / RTI & gt; With this tool, heart sounds began to be more clearly separated.
In 1829, Dr. Charles Williams strong> developed the Laennec Stetoskove by dividing it into two parts, making it a versatile device that can be folded and folded. In the 1830s and 1840s, stethoscopes were developed to provide ease of use with angular movements to doctors’ heart and lung audiences, with one-stop listening and durable rubber. In 1852 the first dual headset stethoscope was used. P. Camman from America and Alfred Leared from England, at the same time, appeared in different forms of this tool.
In the next 40 years, the design of the stethoscope has undergone very little change.
In 1894, Italian Bianchi and American engineer R.C.M. Bowles’ work was used for the rib cage. They followed discussions on the benefits of diaphragm and bell.
In 1940, Dr. Sprague worked with Maurice Rappaport to define the principles of the scientific physics of the stethoscope.
In 1940, Dr. Howard Sprague brought together the first bell and diaphragm combination in 1926 with the need for bell and diaphragm. >
In 1958, the British cardiologist Dr. Aulrey Leatham’s stethoscope was not merely a combination of bells and diaphragms, but contained the second smallest of the two. By means of a lever it was possible for children to use it.
In 1961, Amplivex developed an electronic stethoscope. This device was an advantage with vacuum tube technology.
How Stethoscopes Work h2>
Sounds from the body’s internal organs help doctors understand that the system is functioning normally. For example, sounds from the heart range from 60 to 500 Hz.
Mixed voices underneath indicate a malfunction in the heart valves. The rustling sound around 1400 Hz indicates that there is a disturbance in the lungs. Acoustic stethoscopes actually do the hovering process without amplifying the sound. In a modern stethoscope, there is a receiver in the form of a bell and a diaphragm round cover. The bell with a diameter of 2.87 cm is placed in the body. Body body acts like a diaphragm in the mouth of this bell and transmits the voice from the internal organs with vibration. The diameter of the diaphragm is 4.37 cm and the depth is 0.33 cm. The diaphragm is made of thin bakelite. The stethoscope is useful for listening to low frequency sounds from 30 Hz to 500 Hz. The diaphragm receiver can not listen to higher frequencies between 200 ÷ 1400 Hz. Stethoscope receivers extend into the ear with two soft hoses. The ear pieces are metal and made of 1.27 ÷ 1.60 cm in diameter for the prevention of external noises. External noise can adversely affect low-frequency listening in particular. Share information is multiplied.