"Okay, I'll move on!"

In this single ward of the chest hospital, Liu Hongmei was extremely excited, she discovered Director Wan's murderous method, and she couldn't wait to tell this method.

"Come and see. Liu Hongmei took all those 'things', "The key to this technique is not to leave a pinhole, in fact, the method of bolus potassium chloride is very ordinary in medicine, there is no difficulty, but the intravenous injection will almost definitely leave a pinhole, if it is not injected from the vein, the effect is not so good, so, the pinhole is the key, I said it before, do not leave a pinhole......"

"Leader, let's go on. Qin Yan was so anxious, he could see the excitement of his own leader.

"Haha......" Liu Hongmei was really happy, "These in front of you are the tools that can make the pinholes disappear, you look at this." ”

She pulled out the thin wire.

"Do you know what this is? This is the guidewire, which is used for interventional therapy, this guidewire should be only 0.36 mm in diameter, which is not the thinnest, but it is enough in this technique, and then look at this, I will get the two together, in the middle, hehe, see?"

Liu Hongmei seemed to be playing, took out a guide wire, and then installed a rubber thing that looked like a small round ball in front of her, the diameter of this thing was only about two millimeters, the rubber seemed to be easy to break, the guide wire pierced in, and the barb was stuck, and at this time, she picked up the needle again.

"This needle is a needle, I just have to put it on like this......"

The so-called putting on is to let the tip of the needle pierce the small round ball, and the small rubber ball is not pierced, so that the two ...... are connected In normal times, we would probably think that this is really a delicate metal.

But it wasn't over yet, the wire with a loop at the top came up from the back, just down the hose behind the thin needle, and when it came to the front, it was resisted.

Qin Yan couldn't help but ask, "Why is this needle so thin?"

"Ha......" Liu Hongmei was not angry, and patiently explained: "This is for insulin injection, you can understand it when you have time to go to the pharmacy to buy an injection needle for insulin, and this is not the thinnest, but the diameter of this needle is enough, you see, there is a hose behind this needle, this must be changed by Director Wan himself...... Lao Qin, come here. ”

"Yes. "The leader called, how Qin Yan couldn't do it, he just couldn't think of it......

"Nostrils to me. ”

"Huh?"

It seems that this is to test the needle with his own man.

As long as Qin Yan raised his head, he saw Liu Hongmei holding this thing and slowly ...... It was really inserted into Qin Yan's nostrils.

"Do you feel like you're sneezing?"

"This ...... It doesn't seem like much, but it's ......."

"Haha, because there's a soft rubber head in front, you wait for me to go deeper. ”

"This ......"

In fact, it was a little itchy, but Ouyang Qinghong understood it, if Qin Yan was stunned by ether at this time, then it would be useless to itch his nose.

Then, Liu Hongmei's hand was a little harder, and the top was the metal wire that was put on later, which seemed to be relatively hard.

"Oops, it hurts a little. ”

"How much does it hurt?"

"This ...... It doesn't hurt too much. ”

"Of course! It's for insulin! And ...... I didn't prick your veins. ”

Liu Hongmei finally took out her needle, Qin Yanru was amnesty, in fact, she had just finished applying the needle, at this time, the rubber round head on the top had been pierced by the insulin needle, there was a hose behind the needle, Liu Hongmei used the metal wire that was put on later to exert force, this wire was relatively hard.

Qin Yan's nostrils were slightly bloody.

Wu Gan saw it very clearly on the side, and he basically understood, "So that's the case, Director Wan, you are really clever, and you chose the part of the needle in your nostrils." ”

"Hahaha......" Director Wan laughed, "You guys are simply trying to add to the crime, no matter how much I argue, it seems useless." ”

Wu Gan understood that Director Wan had no intention of surrendering at all, but at this time, Wu Gan thought of a question, "Sister-in-law, is this okay?" I feel, you mean, Director Wan chose the veins in the nostrils to put needles, in this case, we can't find the pinholes, right?"

"That's right!" Liu Hongmei had already returned at this time.

"But, can't you see it in your nostrils? How can you find the veins in here so accurately?" Qin Yan thought of this question.

When Liu Hongmei heard it at this time, she laughed, she was really a little crazy, but this was really a manifestation of a person who had figured out the mystery in her heart, "Look, what is this?"

Wu Qian and Qin Yan looked at each other, and they were not very easy to talk.

It was a white rod.

Rods...... It's a really imaginative.

However, Liu Hongmei was very serious, "Do you know that this thing is called an infrared venous imaging device, and this is a handheld one." ”

Infrared venous imaging machine?

As soon as you hear the name, of course you understand!

Qin Yan even took it and shone it on his hand, there were a few lights on the stick, and it shone like this.

Huo, the cyan blood vessels on his hands are clearly visible.

I only heard Liu Hongmei say: "This technique is too exquisite, the combination of these things, the guidewire, you must know, the front end of the guidewire is very soft, but the back end is used here, relatively thicker, but it is still so thin, and then use another hard wire to cover the needle, this kind of insulin injection needle is also very thin, people, are afraid of pain, insulin injection is very frequent, many medical equipment are thinner than whose needle is made, this is slightly thicker, but it will be faster in terms of bolus."

In addition, this small rubber round head must not be missing, this thing enters with a needle, so that it is not afraid that the tip of the needle will hurt the mucous membrane in the nasal cavity and cause bleeding, when it comes to the position, when the needle is placed, it is to puncture the rubber round head first, and then puncture the vein, so that the bleeding from the needle hole is reduced.

Of course, this is not enough, and this venous imaging machine is also needed.

Do you know this thing?

Haha, the most interesting thing is that this thing was made by us in China, but we almost didn't use it in our Chinese hospitals, we sold it to the United States, and American hospitals used it.

The United States always says that the level of medical care is high, but in fact, the level of operation of their doctors is really average, especially this basic clinical operation.

We don't use it because this thing is too inefficient, and it is not as efficient as being proficient in operation.

Forget it, let's not talk about it, this thing is sold on a certain treasure, you just don't know.

Let me tell you again, this place is called the 'danger triangle', there are acne, pimples and so on, there are more veins, you must know, people are prone to nosebleeds, you are all police. ”

Of course, Wu Qian and Qin Yan nodded, when they were policemen, they watched the most fights.

"Yes, under normal circumstances, there would be no needles here, but this place is nothing to Director Wan, and for Dr. Wan Shiqing, a well-known expert in the field of heart with superb medical skills, not to mention this high-tech thing, venous imaging instrument.

Oh my God, I didn't think of that before, hahaha......

This is really powerful, it really won't leave any pinholes, don't talk about me, the world's most powerful forensic doctors can't even check it out, Director Wan, you are too awesome, I will never be able to do this injection operation, even if there is a developer, it is useless, please accept my respect!"

Liu Hongmei is more and more unreliable, Qin Yan wants his wife to stop talking, "Leader, that ......"

"Don't speak, let me ask Director Wan, that, is there anything else I need to pay attention to in terms of specific operations?"

When Wan Shiqing heard this, he smiled slightly, "You young people, why do you have such a bad imagination? What kind of nasal cavity, you can completely get a needle from the nasolacrimal duct." ”

After Liu Hongmei heard this, her eyes lit up, although this was a denial for her, but she was even more excited, and immediately answered, "Epicanthal vein!"

Director Wan spread his hands, "Almost." Besides, the danger triangle, practice makes perfect, if you want to say that you want to put a needle here, you can try it on your face first. ”

Liu Hongmei continued: "Moreover, the needle is from the nasolacrimal duct, which is from top to bottom, the medial canthal vein does not have a venous valve, and the downward is to the main vein, so the bolus of potassium ions will enter the heart very quickly, and it is better to cushion the victim's head, wow......"

It can be regarded as cracking a mystery in Liu Hongmei's heart.

"yes!

Liu Hongmei was very excited now, but Wu Gan, Qin Yan and Ouyang Qinghong were all stunned when they heard it. Forensic Doctor Liu had no choice but to make a move, that is, to point to both sides of the bridge of his nose, and then explained.

"The medial canthal vein is here, according to Director Wan, insert the needle from the inner corner of the eye, and then cooperate with the venous imaging device to find the medial canthal vein, so that it can be completed. ”

At this point, the whole operation seems to be revealed, but... Where is the needle in the eye? I panic when I think about it.

The other three all had incredible expressions on their faces.

"This little bottle ......" Liu Hongmei really couldn't figure out what the loneliest little bottle was for.

But I heard Director Wan laugh and said: "I have bad skin, and I have aloe vera in my home, which is the juice of aloe vera." ”

Liu Hongmei slapped her thigh, "It's all together!" Aloe vera juice also has the effect of promoting wound healing, such a thin needle, the needle hole left is extremely small, and there is generally no bleeding point when insulin is injected, and it is estimated that the needle hole has healed before the person dies, even if it does not heal, the aloe vera juice is originally gelatinous, and it also sticks to the needle hole.

Wait, this thing also has a lubricating effect, by the way, you can also apply it to the small rubber round head before the needle, so that the needle is smoother, and after the injection, you don't need to apply aloe vera, and you can complete all the bolus actions at one time.

Perfect!

That's how the perfect corpse was made!"

Wu Gan, Qin Yan, and Ouyang Qinghong who were present were all a little stunned, they really couldn't feel what the meaning of the perfect corpse Liu Hongmei was talking about.

In fact, corpses can speak, and when a person is killed, he will definitely leave traces.

In medical theory, there is absolutely no such thing as a trace, which is why anatomy is so crucial.

But this, it is really too creative and difficult to put a needle in the nasal cavity or nasolacrimal duct, and it can accurately find the vein and close the needle hole, so it is too difficult for people to find the needle, and even if you tell that the needle is here, you may not be able to find it.

If there is no superb technology, such as Director Wan, it will not be successful at all.

At this point, Director Wan's murder modus operandi has been unraveled.

But.

"You people are just trying to trick me, aren't you? haha...... It's a pity, but what do you have to do with the so-called murder?"

This...

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