This doctor is already middle-aged, and he's only just started practicing medicine.

Chapter 109 The Matchmaker Becomes a 'Background' (Bonus Chapter for 1300 First Subscriptions)

The diameter of the caudal artery in a naked mouse is typically 0.2 to 0.3 mm, while the diameter of the proper artery in a human finger is approximately 0.2 mm.

Because of the similarity in arterial diameter, tail artery suturing in nude mice is the best vascular suturing material for microsurgical finger replantation.

The most basic requirement for finger replantation surgery is to suture the blood vessels properly so that the severed finger can survive.

The theoretical premise of finger replantation is that a skilled microsurgeon is needed to ensure vascular suturing so that the severed finger can survive!
"Teacher Xie, isn't this unnecessary?"

Xie Yuan'an stood up, gesturing for Lu Cheng to follow her, and said, "If you want to brag to me about this kind of thing, then it's really necessary!"

"You must come with me now."

"Today, either you die knowing why, or I die knowing why." Miss Xie Yuan'an seemed somewhat arrogant and spoiled.

Lu Cheng: "..."

What nonsense! It was just a stitching procedure. They were released even though they knew they were dead.

Of course, Lu Cheng did not back down.

Training programs are not like large university lectures or the communal meals in middle and high school classrooms. In such programs, the more outstanding your abilities are, the more likely you are to receive the teacher's favor.

These professors will prepare many surprising teaching methods for you, enough to benefit you for a lifetime.

Professor Tong Yuan'an is certainly outstanding, but he is still young. The other professors who are teaching this time, apart from Xie Yuan'an, are all top-notch experts, and even the leading hand surgeons at Xiangya Hospital have to treat them with utmost respect.

The technology they possess is the most advanced and essential technology in China.

Lu Cheng was indeed free of any problems, and since he had already checked out of his hotel and had nowhere to go, he simply followed Xie Yuan'an into the "Advanced Technique Training Room" in the hand surgery training room of Peking Union Medical College Hospital!
Upon entering, Xie Yuan'an was greeted by the pungent smell of naked rat urine, but she did not find the smell offensive and went straight to the iron basket containing the naked rats.

"Lu Cheng, please change your clothes and put on sterile surgical gloves. I'll help you prepare..." Xie Yuan'an said.

Lu Cheng looked around, surveying the advanced study room.

The study room was brightly lit and spacious, with only two workbenches in the 60-square-meter empty room.

A mobile operating table, 80 centimeters wide and 3 meters long.

The control panel is equipped with four movable microscope eyepieces on both sides, which shows that the company is very wealthy.

On the shelf against the wall, there are various green disinfection packs, which should contain microsurgical instruments.

There was also a shelf displaying various imported 'sewing needles', 'hemostatic materials', etc., with each basket filled to the brim.

Lu Cheng roughly estimated that if he were to steal these materials, they would be worth at least seven or eight hundred thousand...

Xie Yuan'an walked in carrying a cage containing naked rats, pushed it towards Lu Cheng, and then gestured with her chin towards him: "Here you go..."

Lu Cheng said, "Is it okay if I don't do it, Teacher Xie?"

"No way!" Xie Yuan'an's tone was unreasonable, completely lacking the previous 'generous' attitude of the matchmaker. Her eyes were wide with anger, as if Lu Cheng's refusal would affect her Dao heart.

Lu Cheng had no choice but to do as he was told...

Lu Cheng had practiced these techniques before, although when he practiced at home, the nude mice weren't professionally trained, and the anesthetic drugs all had to be reported to the authorities...

After everything was ready, Lu Cheng appeared on camera.

In principle, suturing the severed tail artery of a nude mouse requires an assistant. However, there are training methods for a single person, which requires a mouse tail clamp.

These instruments are available.

Moreover, after Lu Cheng cut open and exposed the nude rat's tail artery, Xie Yuan'an, fully armed, sat opposite Lu Cheng and began to act as his assistant with great professionalism.

Lu Cheng used hemostatic clamps to close both the proximal and distal ends of the nude mouse's tail artery before cutting off both tail arteries.

Then Lu Cheng took the needle holder and the imported suture needle and began to suture.

Xie Yuan'an saw Lu Cheng's needle holder through the eyepiece, and even with the arc of the operation magnified, it remained steady and without any sign of shaking.

Xie Yuan'an looked up again and saw that Lu Chengguo looked like a skilled hand surgeon. Her eyes widened and she didn't blink...

Xie Yuan'an's heart began to churn, as if her blood was boiling.

"Could it be? He wasn't just bragging? Then...it wasn't...Mu Nanshu saying he was outstanding?"

Lu Cheng's suturing speed is not slow!

The difficulty in vascular suturing lies in the precise and subtle skill required, not in the length of the operation.

Twenty minutes later, Xie Yuan'an used the highly professional equipment in the study room to measure the rat's tail artery.

"Vascular diameter: 214μm!" "Immediate blood patency: 99.3%!"

"Blood flow rate: 0.22-0.26 ml/min!"

"Re2200-2500!"

"Turbulent volume ratio: 12%..."

Xie Yuan'an's expression immediately turned aggrieved, her eyes became red and swollen, and her voice was trembling with tears: "Why is this happening? Why could this happen?"

Why can you do this?

Xie Yuan'an's three consecutive questions left Lu Cheng completely bewildered, as if he couldn't even understand the meaning of the data Xie Yuan'an had just measured.

Oh, Lu Cheng can clearly see the diameter of the blood vessels and the instantaneous blood flow rate.

Pointing to the data, Lu Cheng, who had already taken off his gloves, asked sincerely, "Teacher Xie, could you explain this data?"

"I'm not a hand surgeon, so I don't quite understand it."

True damage, critical hit, fatal blow, unsolvable, Kamehameha – all of these struck Xie Yuan'an's small head, leaving her completely buzzing.

Xie Yuan'an's breathing became much heavier, but despite her anger, she couldn't vent it.

Lu Cheng explained his reasons: he wanted to participate in the competition in order to earn money as a professional gamer.

"Shh, hmph!~" The airflow formed turbulence in Xie Yuan'an's small nostrils, making a rustling sound after colliding.

But since the facts were already set in stone, Xie Yuan'an could only hang her head in dejection.

"The rate of blood flow is neither better the faster nor better the slower. Rather, it should be as close as possible to the normal value of the tail artery in nude mice."

"The theoretical value for the tail artery in nude mice is 0.2-0.3 mL/min. Your value of 0.22-0.26 mL/min is quite standard."

"Because it was just sutured, the rate of blood flow will definitely vary."

"However, there are several types of blood flow states. Laminar flow refers to the blood flow state in which the flow velocity distribution can be predicted in a layer parallel to the blood vessel wall. This flow form is idealized and is a fairly good approximation of the flow distribution in small blood vessels throughout the human circulatory system."

"When a blood vessel ruptures, if there is a narrowing at the suture site, the laminar flow breaks apart, forming turbulent flow or eddies. This is very similar to a river."

Xie Yuan'an used analogies to explain to the layman Lu Cheng, but inwardly she was crying blood. Why the hell did I have to cater to the mindset of a layman like him in hand surgery?!

Aaaaaaahhhhhh! ~
“The calculated value of the dimensionless parameter Reynolds number Re can be used to predict turbulence. A value of Re less than 2000 predicts that the flow will be laminar, while a value greater than 2500 usually indicates that the flow will be turbulent.”

"Being able to control Re within the range of 2000-25000 is quite impressive."

"However, although the overall Re assessment is not turbulent and eddy, eddies and turbulence can actually occur in the localized areas after damage."

"Eddies are localized eddies or stagnant blood flows that are separated from the central streamlines within a blood vessel. These eddies, also known as flowing eddies, often appear at the bifurcation of blood vessels and distal to narrow areas. They usually flow against the mainstream direction."

"The proportion of turbulence in the whole will, to some extent, reflect your condition. Most generally, if the occurrence of turbulence and eddies is relatively high, it is easier to cause blood clots."

"The reason why blood clots easily form in the heart is due to turbulence and eddies. This can be measured using ultrasound..."

"The smaller the ratio of turbulence to eddy current, the better. The ratio of turbulence to eddy current in normal blood vessels is 1%-3%, while it is 1% in the tail artery of nude mice."

"But that was after recovery, right after the stitches were done..."

Xie Yuan'an looked at Lu Cheng, her pride deflated like a punctured balloon: "He's also very good, much, much better than me."

"You, really, are studying this?"

"only."

"For the competition?"

Lu Cheng nodded, refraining from further provoking Xie Yuan'an, who was on the verge of collapse, with his voice, but his physical actions became the final straw that broke her back.

Xie Yuan'an continued to take photos with the camera fixed in place, securing 'evidence'!
Lu Cheng could see clearly that she was pouting, her mouth was almost crooked.

P.S.: 1300 first-day subscriptions are no problem. Chapter 13 will be an extra chapter, for a total of 18 chapters. This book is a slice-of-life doctor story, so there will be more characters.

The author has drafts saved up; these chapters are not currently in production and have undergone multiple revisions and considerations.

If the initial subscription rate is even higher, there will be an extra chapter!

that's all.

(End of this chapter)