In this article, we consider the difference between a stethoscope and a phonedoscope.
Content
When examining the patient, doctors use the auscultation method - listening to the noise that is performed by organs in the human body. During the centuries (from the time of Hippocrates itself) the best options for the initial diagnosis have not yet been invented, only the improvement of devices intended for auscultation occurs. Among them: a stethoscope, a phonldoscope and a stethophonendoscope.
How do these devices are different to listen to internal organs and evaluate their condition?
The history of the creation of devices for auscultation
Stethoscope - Translated from Greek: Stethos - breasts, and Skopeo - I am watching.
In the distant 1816th year, the personal doctor of Napoleon Rene Laennek was called to an unusual patient. The fact is that, according to the information that came to us through the thickness of the story, the sick girl had a very great weight, in connection with which to listen to the heartbeat and work of the lungs in the usual way (we apply ear to chest) it was simply unthinkable.
Looking around, the resourceful doctor found sheets with notes - turning them into a tube, he put it to the victim’s chest and listened. It turned out that the work of the organs was so heard much more clearly - and over time, a talented diagnostician created this tool already made of wood with extensions at both ends of the tube (its analogue can be seen today in the hands of obstetricians).
More familiar to modern man is the binary stethoscope, invented in 1851 by Arthur Lidem. In this apparatus, the sound is taken into the camera and fed to two tubes, the ends of which are inserted into the ears. Very effective for low -frequency sound in diagnosing the heart muscle.
- Phonendoscope - He was invented in the first half of the twentieth century by the Russian surgeon Nikolai Korotkov. It was he who first decided to equip the stethoscope bell with a membrane that enhances the sound, and name the updated binaural device with a phonedoscope, which became irreplaceable when listening to the lungs.
- Stetoprophoproscope - This is a hybrid of two of the above devices for auscultation, in which their strongest aspects retained. It includes interchangeable or combined tips, and in their structure they can be without membranes (stethoscopic) or with membranes (phonedoscopic).
These are more modern medical devices that allow you to cut off unnecessary sounds, concentrating only on the necessary noise. And if they are also digital, equipped with small batteries, then the data obtained by examining the patient can be entered into the computer and monitor the patient's condition in the dynamics.
Differences between the stethoscope and the phonedoscope
- Fonndoscopic membranes are missed in the majority high frequency sounds, Which produce light and blood vessels, and funnels - low frequency (heart and intestines). At the same time, low frequencies slightly muffle high.
- Stetoscopic membranes lower the volume of the sound in general, High -frequency fluctuations in the fore.
Due to these features, a phoningoscope is more effective to use when listening to lungs and blood vessels, and a stethoscope-the heart and intestines.
It is worth noting that visually these devices are also very different. Like the price of various manufacturers: according to experts, a high -quality stethophonendoscope costs at least $ 90.
What does a modern stethophonery look like?
A modern auscultation device consists of a head, a membrane or diaphragm, connecting tubes, tubes and heading tips or olive. Often it is called abbreviated in honor of the ancestor - a stethoscope.
The head of the device can be made of plastic, aluminum or, ideally, stainless steel. The diaphragm is needed flexible and durable, with a dense flying to the body. It is better to choose connecting tubes from vinyl - and thicker, 30 centimeters long with a channel diameter of 4.6 millimeters. It is much more convenient to use soft helium and rubber olives instead of plastic.
The leading manufacturers of devices for auscultation today are: Dr. Frei and MDF (both from the UK), Kawe (from Germany), Little Doctor (from Singapore), Littmann (from the USA), Microlife (from Switzerland).
Video: The difference between auscultation devices
