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"Master Sun, these days when you left Chang'an, I have made a utensil for diagnosis. I think it should be very useful. I will take it for you today!" In Sun Simiao's house, Chen Yi showed Sun Simiao the stethoscope he had improved while he was at night.

Last night, I listened to Ning Qing and the effect was pretty good. Chen Yi changed it slightly after Ning Qing left to increase the sealing of the receiver. After getting up this morning, he didn't eat breakfast, so he took the newly made treasure to Sun Simiao to show off!

Sun Simiao got up very early, and because he had to deal with the matter, he called Wang Chong and Liu Hai over early in the morning to discuss the matter, and Ning Qing was also on the side.

Seeing Chen Yi looking happy and holding a strange thing in his hand, Sun Simiao showed a curious look: "Oh, Ziying, what kind of artifact is it? Take it over and show me!"

"Master Sun, this is called a stethoscope. It is recorded in ancient medical books that it can lead and amplify the sound in the human body through the transmission effect of objects, making it easier to be heard and distinguished by our ears! There is nothing happening these days, and suddenly I thought of making this. After a few days of tossing, I finally made this object," Chen Yi presented the simple stethoscope he made to Sun Simiao, pointing to the funnel-like object at both ends and said, "This was made of wood after spending a few days. This end is close to the heart and lungs of a person. We attach it to the other end, listen with our ears, and you can clearly hear the heartbeat and breathing sounds of people. If the sealing performance is good and the noise from the outside world is isolated, some subtle changes in the human body can be found. Ning Qing and I have tried it just now, and the effect is quite good..."

"Oh?! The disease diagnosis tool you made?" Sun Simiao took the stethoscope from Chen Yi's hand with interest, looked at it carefully, and asked, "Zi Ying, why is this thing...made like this?"

Chen Yi showed a natural and complacent smile, pointed to the stethoscope and said slowly: "Master, this end is attached to the patient's heart, lungs, and heartbeat breathing sounds can be transmitted through the chest wall to the funnel-shaped earpiece. If it is tightly attached to the patient's chest, almost nothing can be missed and all can be transmitted. If the sealing performance is good, many other noises can be separated and the sound can be amplified. These sounds are transmitted through this empty wooden pipe in the middle. The wooden pipe is thicker and is closely connected to the funnel, so most of the sound will not be damaged.

If we lose it, then it will be transmitted to the funnel here. If our ears are close to this funnel, we can clearly hear the sound coming from us. Using this thing to auscultivate the patient, it can avoid some inconvenience, and it can more intuitively and clearly hear the heartbeat, breathing sound, and even sounds from other parts. Judging the patient's disease place and progress of the course of the disease from the abnormalities of these sounds, it has a very important effect on diagnosis of the disease... I have tried it. The breathing and heartbeat sound can be clearly heard, and small sound changes can also be discovered!"

"Well! Ziying, what he said is very reasonable. It seems that your brain is very good. Let's try it in front of me to see how it works!" Sun Simiao looked at Chen Yi, then looked at the two male disciples standing beside him, pointed at Wang Chong and said to Chen Yi, "Ziying, you can try it on Wang Chong now, and listen to his heartbeat and breathing with the thing you made!"

"Yes, Taoist priest!"

Chen Yi signaled Wang Chong to sit down aside. He also sat beside Wang Chong, and then ordered Wang Chong to untie the collar of his clothes and said to Sun Simiao: "Master, remove the barriers of clothes and listen closely to people's skin. You can listen more seriously, and you can also remove the noises caused by rubbing clothes... If the patient's clothes cannot be removed because it is inconvenient, try to avoid friction and movement to avoid noise!"

Chen Yi said, sticking one end of the stethoscope to the tip of Wang Chong's heart, who had untied his clothes, and putting his right ear into the funnel that was used as the earpiece. When Chen Yi made this simple stethoscope, he used this end of the earpiece to wrap his earpiece as the starting point. There was also a layer of skin on the edge of the wooden funnel to better wrap the ears and isolate the outside noises to avoid the sounds from outside being mixed with the patient's breathing and heartbeat sounds coming from the earpiece.

Chen Yi was not sure whether Sun Simiao understood human anatomy. However, when he thought about studying medical technology, many years ago, Sun Simiao should have known many human physiological structures, and did not take too much into consideration. While listening, he explained the projection of the heart and lungs and other organs on the surface of Sun Simiao and the few people around him. He pointed to Wang Chong's chest and explained to everyone where the clearest heartbeat sound could be heard, where the breathing sounds of the trachea and bronchials could be heard, as well as the sounds of the flow of blood from the heart, as well as the sounds of some muscles and organs sliding and peristaltic movements.

These are the basic skills of clinicians in later generations, and they are very clear in anatomy and diagnosis, and everyone should understand it. However, Chen Yi thought that people in ancient times should not understand these things very well. At least many people should not be completely clear about it, just like Sun Simiao's disciples, so he said it very carefully!

Although this stethoscope is simple to make, it can be used as it is just right. There is no sound on the side. The sounds made by the organs in the body and the sounds produced by breathing can be heard clearly, and even the sounds of Wang Chong's hidden swallowing can be heard clearly.

Chen Yi's detailed account made everyone stunned, and Sun Simiao was the same. He had to admire Chen Yi, a magical and weird young man, who could understand the distribution of various organs in the human body in such a detailed manner. He had originally thought that he had probably known Chen Yi's identity, but he became suspicious again. A person who knows so much about medical theory should not be consistent with the identity he originally identified. Most of the recognition was almost overthrown, and Sun Simiao had to guess what Chen Yi's identity was again.

Wang Chong and Liu Hai were also very surprised. What Chen Yi said was unexpected again, because their master Sun Simiao had never said this knowledge. They were all people who knew medicine. Knowing that what Chen Yi said was very reasonable, they couldn't help but feel amazed and admired. Ning Qing looked even more admiring, proud that Chen Yi understood so much, which made her master stunned.

Chen Yi listened to the heartbeat and breathing of the strong Wang Chong for a while, as well as the squirming sound of the abdominal organs. He then moved his head away from the edge of the receiver and said to Sun Simiao: "Master Taoist, come and try this thing you made..."

Needless to say, Sun Simiao was ready to listen to it in person, so he immediately moved over, sat down, and plugged his right ear into the earpiece. He sounded carefully. During the listening process, he also moved the projection part of the organs in the resting table as Chen Yi just said.

The few people next to them also held their breath and looked at Sun Simiao.

After a while, Sun Simiao raised his head, his ears left the stethoscope, and his face showed a look of surprise. He looked at Chen Yi and said, "Zi Ying, such a simple thing can actually hear the sound of the heartbeat and breathing in the human body so clearly, and some extremely subtle sounds can be heard clearly. This thing is really useful! With such a powerful tool, doctors can check the disease more clearly when diagnosing patients! It is amazing that you can make such a good diagnosis tool..."
Chapter completed!