"Cheers!"

The glasses filled with wine collided softly, making a series of crisp sounds, and then the wine was drunk by the excited people.

Hans shook his head and brought another bottle of red wine to the four young men.

It's been two weeks since Johann got his MD from the University of Berlin, and it's only now that he's celebrating with his friends, and it's no surprise that Hans doesn't want to spoil everyone's interest. And John had already passed his sixteenth birthday, and Mr. Butler felt that he could already decide something for himself.

After putting down the wine glass in his hand, John smiled and said, "Gentlemen, please be quiet for a while!" To thank you for the gifts you gave me, I have prepared a return gift for each of you! ”

"A return gift?"

After listening to John's words, everyone's eyes looked at him curiously. In order to congratulate John on getting his doctorate, the three of them did put a lot of effort into preparing a gift, but they were able to get a return gift, which made them all a little curious.

John laughed and nodded at Mr. Housekeeper, who had just put down a bottle of red wine, and the other party immediately left the living room, and after a while, he brought back three long cardboard boxes and placed them in front of the three of them.

A curious Thomas picked up a box, looked at John and asked, "Can I open it now?" ”

"Absolutely."

John smiled and made a casual pose.

The impatient Robert quickly ripped open the outer packaging of the box, and then took out the four things inside one by one: "A pocket watch, a thermometer, a stethoscope, and a ...... Hey? What is this? ”

The eyes of the other two soon focused on this strange thing.

Pocket watches, thermometers, and stethoscopes are all familiar. It's just a little more beautiful than the usual ones on the market, but this fourth thing is a little incomprehensible to them. A slender tin box, when opened, was filled with a graduated mercury column, like a large thermometer, and two rubber tubes, one connected to the mercury column and one that looked like a cloth roll. One is connected to a cloth roll and a rubber ball, and the structure is quite complicated.

After signaling to Robert, John pulled the blood pressure monitor in front of him and introduced with a smile: "Gentlemen, this is a blood pressure monitor designed by myself!" ”

"This is a blood pressure monitor? Or did you design it yourself? ”

After hearing John's introduction, everyone was taken aback at the same time!

Of course, they've all heard of blood pressure monitors, and Charlotte Hospital even has one, but no matter how they think about it, the three of them can't connect the thing in front of them with the bulky thing in the hospital! They don't know. John omitted all the countless improvements in the history of blood pressure monitors, which can almost be regarded as a one-step process, and directly took out the blood pressure monitors of later generations, which no one can recognize in this era.

Everyone's curiosity was immediately aroused.

After patiently appreciating everyone's expressions for a while, John asked with a smile, "Ladies and gentlemen, do you need me to show you how to operate it?" ”

"Of course!"

In unison, the three of them said eagerly at the same time.

"Actually, the principle is very simple."

While hand-to-hand put the blood pressure monitor horizontally, John patiently explained: "It's just to use a cuff that can be inflated." to block the flow of blood...... Gentlemen, I need someone to cooperate with my operation! ”

"I'm coming!"

Almost as soon as John's words fell. Robert couldn't wait to stand up.

"Sit in front of me!"

John didn't hesitate, and directly let Robert sit in front of him, and then reached out and put the cuff on his arm, while explaining in detail: "I call this thing a cuff, it can be inflated, and the pressure is transmitted to the mercury column." Show specific readings......"

Everyone still understands these basic physics knowledge, and everyone's attention is focused on John's operation.

“…… When the pressure reaches a certain level, the blood flow in the arm will be blocked, and the deflation should be done slowly, and the stethoscope should be placed near the artery between the cuff and the arm. Listen carefully for the pulse sound! ”

"Because of the cuff pressure, we could barely hear at first; But as the cuff pressure drops, we hear a sudden increase in the pulse sound, and the pressure shown is the systolic blood pressure ......"

"Different people may have some small differences in blood pressure measured because of differences in hearing and attention, and in general, the operation and use of this blood pressure monitor must take a long time of practice."

"It's important to note that we have to look at the mercury column when we listen to the pulse sound, because even a second of error can make the blood pressure measurement inaccurate! And the speed of deflation must also be controlled, and it must not be too fast......"

"Sting!"

After completing the full set of operations, John untied the cuff on Robert's arm, patted his arm with a smile and said, "Systolic blood pressure 110, diastolic blood pressure 75, in ...... Hmm, it should be within the normal range! ”

"It's amazing!"

It was only at this time that Thomas next to him screamed!

The gadget in front of them, which John called "mercury vertical blood pressure monitor", made the three of them completely dumbfounded, and no one could have imagined that blood pressure could be measured by this method! In particular, John's observation and judgment of the subtle changes in the sound of blood flow made them even more impressed!

"Can I give it a try?"

Paul couldn't wait to grab a stethoscope and asked excitedly.

"Of course you can!"

John raised his eyebrows and smiled slightly: "I'll be a patient, and the three of you can take turns to try!" But I must remind you that if you want to measure someone's blood pressure, you have to make sure that he is in a calm state, as I am sure of in Paul's current situation......"

……

"You should publish this new method right away!"

Reluctantly putting down the stethoscope in his hand, Paul looked at John and said eagerly: "And this kind of blood pressure monitor should also be patented immediately, I'm sure every doctor can't wait to have a ......"

"Haha, I've been ready for a long time!"

After listening to Paul's Jianyì. John couldn't help but laugh.

Who else in this world knows the value of these things better than him? This kind of blood pressure monitor was still used by many doctors until he crossed, so John had already applied for a patent when it was designed, and John never skimped on that little cost and time in this regard.

As for the use of stethoscopes and blood pressure, John has already prepared a paper and is just waiting for it to be published.

It's like a child getting a new toy. The three of Thomas kept fiddling with the blood pressure monitor in their hands, and tried on each other again and again! Although there is a slight difference in the values measured before and after due to the ups and downs of the emotion, they are basically within the allowable error range, which makes their eyes on this kind of blood pressure monitor more and more hot!

After another test, Thomas took a deep breath and said in a deep voice, "John, I think it can be used on a regular basis right away, and I have a hunch that its appearance will completely change the way doctors think about blood pressure!" ”

"That's right!"

For Thomas's words. Paul and Robert immediately nodded in agreement.

"That's why I gave each of you one!"

Crooking the corners of his mouth, John said with a smile: "And gentlemen, what we want to change is not only the doctors' understanding of blood pressure, but we must not forget this!" ”

"Haha......"

Hearing John say this, the other three also laughed happily.

Unlike Professor Bergman, who had concerns, the three of Thomas participated in John's preliminary preparations from beginning to end, and it can be said that every day they will see something enough to subvert their traditional perceptions, but John can also prove his correctness through various microscope realities. How can this not be convincing?

Seeing the happy appearance of the three of them, John was also very satisfied.

You want to attract enough talent. In addition to a good pay, there is also a bright future, John can undoubtedly provide enough help to them, and the more successful he is, the more talent he can attract to join, and these three people will be the best example in his hands! And after getting along for so long, John basically figured out their personalities and characteristics, and also designed a path for them to take in the future......

"Gentlemen!"

He clapped his hands gently. John exclaimed, "In addition to these four gifts, you will soon see another surprise that I have carefully prepared!" ”

"What surprise?"

Robert's eyes lit up, and he asked almost impatiently.

John laughed but didn't say anything.

However, seeing John's expression, the attentive Paul suddenly asked, "John, are you talking about surprise...... What does it have to do with the ten days that you disappeared after your graduation ceremony? ”

Since the day of the graduation ceremony. The three of them never found John's figure, and they had to wait until today to celebrate him, so Paul guessed that the kid was probably going to prepare for the so-called surprise.

"That's right!"

Thinking of what had happened at the Cole Steel Plant in the past ten days, John's face almost turned into a flower.

After personally sending Anna home that night, John and Baron Cole began an exchange that amounted to negotiations, and after staying up all night, it was quickly agreed that John would take a stake in a patent license outside the United States, and Baron Cole would invest in a new steel mill to produce stainless steel. On the other hand, John invested 100,000 marks plus a design patent, and Baron Cole also invested 100,000 marks, and the two sides jointly built a small machine factory specializing in the production of medical devices designed by John......

Of course, the premise of the cooperation is that the stainless steel that John said can indeed be produced.

So at the insistence of Baron Cole, the two simply soaked in Cole Iron and Steel Plant for several days, and finally trial-produced the first batch of about half a ton of stainless steel! It was actually adding chromium-nickel and other materials to steel, and John had several recipes in his memory, and Cole's men only needed to spend a little time.

After a week of real yàn, it was determined that it was stainless steel!

Baron Cole's ecstasy naturally does not need to be described too much, the stainless steel factory plan was immediately put on the agenda, and the manufacturing plant that John needed would also start to be built immediately, and the entire set of surgical instruments he needed would be made by Baron Cole's manufacturing factory for the time being......

Baron Cole almost couldn't wait to sign John to the contract.

Although John stressed many of the shortcomings of stainless steel to Baron Cole, the steelmill owner did not care. No matter how you look at it, stainless steel has a wide range of uses, and it can be used as a high-end steel when it is first launched, and the profit is definitely not low.

Baron Cole didn't care too much about the surgical instruments designed by John, and didn't think there was much prospect, so in return for John, he just asked for 20% of the company's shares.

What else can John do but steal fun?

He never planned to get involved in any steel, and to be honest, he was not very optimistic about the application prospects of stainless steel in this era, and he was very satisfied to have a little share. But even so, John only authorized Baron Cole to use it outside the United States, and he will definitely have one in the United States in the future.

The more he thought about it, the happier he became, and John nodded vigorously and said, "Gentlemen, I think there will be ten days at most, and you will be able to see the surprise I have prepared......" (to be continued......