Early Tang Dynasty: Tell Li Er I'm a time traveler at the beginning

Chapter 22
The process of Li Chong's education of Li Chengqian is always so casual.

After discussing the issue of the guards with Li Chengqian, Li Chong put on his cloak and went back.

After returning, he had to think about how to get the mercury sphygmomanometer.

First of all, he may need a craftsman from the Western Regions who can make transparent glass.

But even if you get such a craftsman.

He can't do this rubber tube either.

If you can do both of these things, then the rest will be easy to handle.

Difficult!

Looking at Li Chong's leaving figure, Li Chengqian felt that his teacher was very tall.

……

The next day.

Li Chong first went to Sun Simiao's house in Chang'an.

I got to know Sun Simiao, how they usually store mercury.

It is also very important to learn from the ancients and not build cars behind closed doors.

Then it quickly became clear that, normally, they turn the mercury into cinnabar, which is mercury sulfide.

Since mercury sulfide is a solid mineral, it is much more convenient for transportation and storage.

The problem is... this is not the answer Li Chong wanted.

See Li Chong frowning.

Sun Simiao said, "Do you have an idea about the sphygmomanometer you mentioned?"

Li Chong took out his schematic diagram, "I have an idea, but under the current conditions, it is impossible to make it."

Sun Simiao looked at his schematic diagram.

This diagram...

It can only be said to be refreshing.

Seeing that Sun Simiao was so curious, Li Chong explained the principle to him by the way, "This mercury is stored here, and it can be used to cheer up..."

"Then you can't use the mercury you mentioned? Since you said mercury is so dangerous."

"That's because if you don't use mercury, the glass tube will have to be made very high. But it's not impossible to try... What is the density of this mercury?"

See Li Zhong looking at himself.

Sun Simiao can only say, you ask me, I ask whom.

and……

"What does this density mean?"

"The so-called density is... I also forgot."

Sun Simiao: "..."

"If it's water, then it's almost enough to use a normal pig's bladder as an air bag. Speaking of it... By extension, can rubber tubes do the same?"

Li Zhong slapped the table!
Although the airtightness is very doubtful, at least, if the conditions do not allow it, it can only be tried in this way.

At most the error is bigger.

Anyway...

He didn't think about how accurate it was, he only needed a relative value.

"What about your side?"

Sun Simiao said: "According to what you said, I have also found some medicines that may help lower blood pressure. Speaking of which, how did Xueshi Li know so much?"

"Maybe I've learned more."

"Oh."

Sun Simiao nodded slightly

——Then you just said it, or you didn’t say it! ?What the old man wants to know more is actually where you learned this from.but……

It's like he often asks others to show him the prescription. In many cases, the prescription is the secret of his ancestors.

Li Xueshi's kind should belong to the kind of secret that is not passed on.

"Let's make the stethoscope first."

Then Li Chong said again.

After speaking, Li Chong settled there.

Sun Simiao saw him not moving for a while, and said, "Didn't you say to make a stethoscope?"

Li Zhong replied, "I don't want to move."

This ancient life is good. If the pace of life is slow, he will almost become that sloth called Lightning.

I thought about it.

Let Li Chengqian do it.

Young people, run more, it is more conducive to exercise.

after that……

Li Chong asked Sun Simiao's apprentice to deliver a letter to Li Chengqian, then asked Li Chengqian to send a message to his father, and then asked Li Er to send one of the best craftsmen in the Tang Dynasty.

When this set of procedures was completed and Li Chong saw the craftsman, it was already early the next morning.

The craftsman is named Lao Liu, because he is the sixth in his family.

Li Chong quickly told him how to use the stethoscope.

In fact, Li Chong was not sure if he did this.

However, let the other party do it first.

After the other party learned of Li Chong's needs, he naturally worked overtime and knocked out the stethoscope.

three days later.

The first-generation stethoscope was made, all of which were made of copper tubes and no rubber was used. Li Zhong took Li Chengqian to try it out.

Not to mention, Li Chengqian's heart was beating quite strongly.

Sun Simiao also listened to it. It was his first attempt to amplify the sound of the internal organs of the human body to find the focus of the patient.

After listening to it, he said: "Although the old man can also detect the problem of the internal organs by taking the pulse, but your method, Li Xueshi, is also a simple and clever method."

Li Chong said: "Actually, this is not a coincidence at all, and it takes a little bit of experience to accumulate experience to truly achieve the purpose of curing diseases and saving lives. However, it is true that it can be used to confirm each other with the pulse."

After Li Chong finished speaking, he said to the craftsman: "The one you made now is good, but there are still some noises. You can go back and try again to see if you can increase the thickness of the copper pipe wall, or Reduce the inner diameter of the copper pipe to make the heard sound clearer."

The craftsman nodded in response.

Here is the stethoscope.

Li Chong then tried to study why he hid the stethoscope in his arm sleeve when measuring blood pressure.

But since he was not a professional, he didn't seem to find anything special.

How do other people measure blood pressure?

This made Li Zhong puzzled.

But he clearly remembered that that's what the doctor did, yes.

Possibly deflated?
Correct!
This breath should be released little by little.

There are usually two blood pressures, like diastolic blood pressure, and what is the other called?

Why there are two readings, I am afraid, is through the stethoscope.

These are all included in the 30.00% that Li Chong said before, which he didn't know.

therefore……

For the next period of time, Li Zhong kept using Li Chengqian as an experimental subject.

As for the sphygmomanometer, except for the glass part, Li Chong slowly found out everything else.

Sun Simiao here.

It is also a combination of pulse detection and stethoscope, and even went to some patients with gas diseases in person to test the effect of stethoscope with stethoscope.

can only say……

This works surprisingly well.

He even found that if he used the stethoscope together with the pulse, it would be more helpful for him to judge the patient's condition more accurately.

It's just a pity.

The person who invented this thing, that is, Xueshi Li, didn't know how to use it.

That can only be that he has slowly completed the usage of this thing little by little with years of experience.

For example, what kind of sound you hear, you can roughly judge what kind of disease it is.

(End of this chapter)