Release date: 2016-03-04

Recently, a section of a stethoscope has been on fire on Weibo. Well, this is:

Ok, the situation mentioned here is indeed true. The first version of the stethoscope was invented by Rene Theophile Hyacinthe La?nnec in 1816, and for a long time before, if doctors wanted to auscultate, they could only attach their ears directly to the patient. The chest is up.

It must be clarified seriously. Here, the "chest" refers to the chest, not the breast. Please don't over-emphasize the chest scene... However, "until today, doctors can't forgive him." It must be just a joke. Although the stethoscope seems to be only an inconspicuous object, its medical contribution is not trivial, and later doctors and patients have to thank it.

Birth of a stethoscope

In 1816, 35-year-old Dr. Renek received a young female patient who appeared to have symptoms of heart disease, but the diagnosis was not clear. In the early 19th century, medical technology was still very scarce. In addition to direct auscultation on the ear, the chest examination method that can be used by doctors is only touch and percussion. (Note: The percussion is a physical examination method that taps the body to listen to the sound, different The body tissue of the ingredients will sound differently, just like picking a watermelon...). After undergoing palpation and percussion, Reneck still did not get much diagnostic clues. At this time, auscultation should be performed, but the doctor is “reluctant” to directly auscultate young female patients (how to have this kind of Well! Well, I can only say that the information I found is written like this.)

so what should I do now? Dr. Renek, who is feeling a big name, suddenly remembers the game of "sound tube" that he had seen before. The two children are at the two ends of a piece of wood. One person hits the wood at this point, and the other person You can listen to the "signal" on the other end. The same principle can be put into auscultation, so Renek rolled up a paper tube and applied it to the patient's chest to try to "indirect auscultation." It turned out that this was a fairly correct decision: he not only successfully heard the patient's heartbeat, but the sound was quite clear and better than direct auscultation. Renek immediately realized that this might be a very useful diagnostic tool.

In the next few years, Renek tried to make stethoscopes from a variety of materials and used them to auscultate the sounds in the patient's chest. In the end, Renek identified the official version of the original stethoscope: a wooden hollow tube, about 25 cm long and 3.5 cm in diameter.

It’s like this:

The problem it solves is much more than "å°´å°¬"

With this tube, where not to poke, auscultation is no longer awkward! However, the problem solved by the stethoscope is much more important than the one. The appearance of a stethoscope greatly enhances the clarity of auscultation, giving doctors the opportunity to distinguish subtle changes in body sounds under various diseases. This is its most important credit. (Even a doctor who does not feel blushing about "direct auscultation" will not be willing to abandon the stethoscope, because it is really unclear to listen directly to it. It is even more difficult to catch up with a fat patient...)

(Direct VS indirect auscultation, the people in the painting are Renek, or have a stethoscope more elegant ~)

Like all other scientists who have invented research equipment, Renek has also become a pioneer in the auscultation industry, starting a series of observations with his invented props. He summed up a number of rules that can help diagnose the patient's cardiopulmonary auscultation results, which were also verified in the results of autopsy. In 1819, Renek published his cardiopulmonary auscultation monograph. Since then, the stethoscope has undergone several improvements, the front section is covered with a flexible membrane, the earpiece has become a pair of ears, and the tube connected in the middle has also become a rubber hose, which has become a step by step.

Until now, the stethoscope is still a long-lasting diagnostic tool. Like the white coat, it is the most iconic doctor in our minds. Now that you want to understand the secrets in your body, there are already many advanced auxiliary tests available, but in the hands of experienced doctors, stethoscopes are still cheap and effective screening tools.

Can you hear it in your stethoscope?

When the doctor put the stethoscope on your front and back, did they hear it? Chest auscultation mainly listens to the sound of lung airflow and blood flow from the heart. The normal heart can hear regular beats, and if an irregular heartbeat or other murmur occurs, the heart may have a problem.

Listening to the sound of lung breathing with a stethoscope is also very diagnostic. Compared to the heartbeat, Renek is actually more concerned about listening to the lungs of patients. There is also a reason for this concern. At that time, tuberculosis was rampant, and the Renek family (including himself) suffered from tuberculosis. If the trachea becomes clogged, narrow, or if there is inflammation in the lungs, the sound produced by the airflow will be different, which can provide clues to help diagnose.

Source: Shell Network

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