Tang Zheng took Zhang Ji to the experimental building, Tang Zheng turned to Zhang Ji and asked, "Do you know what kind of place this is?" ”

Zhang Ji nodded and said to Tang Zheng: "Isn't this the experimental building?" Even though I hadn't been there, I knew there was a place in medical school. ”

"Well, this is the laboratory building, as the name suggests, this is the place where experiments are done. Let's go, I'll take you inside. After speaking, Tang Zheng led everyone to walk inside, the experimental building as a whole is not high, only three floors plus a negative floor, and everyone doesn't know what the negative floor is used for, Tang Zheng didn't tell everyone.

Tang Zheng led everyone to the third floor, the overall layout of the laboratory building is different from that of the medical school and the academy. Walking into the laboratory building, people feel very cold, this kind of cold does not give people the feeling of loss we usually say cold, this kind of cold seems to be leaked out of people's bones, which makes people can't help but shiver.

"I mean, why does this feel colder than our medical school? It gives a feeling of indescribability. This feeling is like ......" Zhang Ji said to Tang Zheng, but he didn't know how to describe this feeling.

"Deep?"

"Yes, that's the feeling, it's deep, it's chilling all over the body."

"It's all your delusion, but this building was originally intended to be used for surgery. The surgery must be performed in a quiet and clean environment, which is why it is designed to be this way. Tang Zheng said. After speaking, he continued to lead everyone to the third floor.

Coming to the third floor, Tang Zheng led everyone into the operating room. Tang Zheng pointed to a bunch of all kinds of knives and introduced to everyone what this does and what this does. After introducing the tools to be used in the operation, Tang Zheng led everyone to the laboratory.

Today, there happened to be a military doctor in the laboratory who was experimenting with sheep, and I saw that the military doctor was doing bone grafting surgery for the maintenance of a broken leg. Tang Zheng pointed to the sheep and said to everyone: "Actually, we humans and animals are the same, but there is one more thing called wisdom than animals that distinguishes people from animals." ”

Everyone nodded, and then Zhang Ji asked Tang Zheng again: "You said so much, but I still don't understand what is the relationship between animals and surgery?" ”

"Actually, what I want to say is that no matter how deeply we study the human body, we must first do experiments on animals, and if the animals can survive and have no sequelae, we can use them on humans."

Zhang Ji nodded and said, "That's the truth, then you can talk about how the woman's birth can be solved by surgery." ”

"There are a lot of issues involved, and I don't know much about them. But as far as I know, a woman who has a difficult birth can actually surgically cut open the woman's belly to carry the baby out, and then use special needles and threads to close the wound. ”

Everyone looked at Tang Zheng in surprise, it was the first time they had heard someone say that they could cut open their stomachs and take the child out. "Wouldn't it hurt? Can the woman endure this pain? One of Zhang Ji's students asked.

"Yes, it does hurt, and it is difficult for ordinary people to endure the pain of cutting the flesh, which requires a drug that can anesthetize the patient and temporarily lose consciousness of the pregnant woman before the operation can be performed." Tang Zheng said.

"Well, I seem to have heard of this medicine you said, it is a medicine invented by Huashen Medical Doctor called Ma Boiling San, which can achieve the effect you said after taking it." Zhang Ji said.

"Seniors also know Doctor Hua?" Tang Zheng asked.

"I've had a few encounters, and I've met him a few times when I'm traveling. How do you know his name? Zhang Ji asked rhetorically.

"If we have the help of Dr. Huashen at Rinsan Medical College, then the medical school will go to the next level! To tell you the truth, I once sent someone to find my predecessor and Dr. Hua. It's just that Huashen Doctor Shenlong didn't find the head and the tail, but the predecessor himself went to Rinshan. ”

"Hahaha, so I'm still in the net! However, Hua Tuo's medical skills are indeed worthy of the word miracle doctor. Zhang Ji said.

"The medical skills of the predecessors are not bad, but they are different from the fields that Huashen doctors are good at, Huashen doctors are better at surgical treatment, while the predecessors have absolute authority in the field of internal medicine, especially typhoid fever."

"Hahaha, that's. For typhoid fever, I don't think I'm worse than others. By the way, let's continue to talk about the operation, as for Hua Tuo, we'll talk later. ”

"Well, as long as there is the kind of medicine that can make the patient unconscious, many diseases can be treated with surgery. For example, if you have a carbuncle in the intestines, we can ask the patient to take the hemp and boil, and when he loses consciousness, he will cut the abdominal cavity, cut off the appendix as I am talking about, and then close the wound. Tang Zheng said to everyone.

"It's as simple as that?"

"Yes, it's as simple as that, but only if you know where the appendix is. By the way, it's not just about human skin that we see, there are many layers of human skin. This layer that we see is the epidermis, and there is also the dermis below the epidermis, and there is subcutaneous tissue under the dermis. It is only after these layers are cut that we can see the organs we know, and the sutures used in different cortex are different. The dermis layer is generally sutured with amnion thread, as for what is amniotic thread, it is made of thread made of soaking and drying with spirits after washing the casing with raising, as for the epidermal layer, it can be directly made of ordinary silk thread, but it should also be boiled with boiling water and then soaked in spirits before it can be used. ”

"Why boil it in boiling water and steep it in spirits?" Zhang Ji's student asked.

"I used to tell my predecessors that the redness, swelling and pus that we often see are caused by a kind of microorganism that I call bacteria, which we cannot see with the naked eye and should not be eliminated, but this microorganism is afraid of high temperatures and alcohol. The reason why boiling water and soaking in spirits is to prevent this microorganism from infecting the wound. ”

Everyone nodded, and they believed Tang Zheng's words. "I mean, in addition to understanding these basic things, you also have to be careful and courageous. If a person faints when he sees blood, I am afraid that he will faint on the operating table as soon as he cuts the wound, and he will talk about saving people. ”

Everyone immediately laughed, Tang Zheng raised his hand and waited for everyone to be quiet before continuing: "In the process of surgery, we must also hurry up to prevent the patient from dying due to ischemia caused by excessive blood loss from the wound. ”

"Surely there will be bleeding when the wound is cut open? Is there anything you can do to prevent people from losing too much blood. Zhang Ji asked.

"There is no good way to prevent this, only to give blood transfusions to patients. As for how to transfuse blood, this is another kind of knowledge, each of us has a certain amount of blood in the body, once it is lower than this amount, it will lead to a coma, and it can cause death in serious cases. ”

"Then why doesn't a cut usually cause death?"

"That's because our body will continue to make blood, and I said that we died of excessive blood loss because the body's hematopoietic speed can't keep up with the speed of blood loss. We are injured in our daily lives, and the rate of bleeding from wounds is much smaller than the rate of hematopoiesis, and as I said earlier, there is a certain amount of blood in our bodies, and only below this amount will it pose a threat to people. Only when the body's blood is reduced, our hematopoietic function will work, and usually the hematopoietic function is dormant. ”

"Then tell me about how to transfuse blood." Zhang Ji said.

"There's a lot of knowledge in this, and I don't know much about it, but I only know some basics. I only know that at present, our human blood can be divided into four categories: A, B, C, D, and of course, there are some rare blood types, but there are fewer blood types, so we won't talk about it. We're just going to talk about these four blood types today. Tang Zheng said to everyone.