Blood pressure refers to the lateral pressure acting on the blood vessel wall per unit area when blood flows in the blood vessels, it is the driving force that pushes the blood to flow in the blood vessels, and becomes the basic vital sign of the human body along with breathing, body temperature, and heart rate.

The normal range of blood pressure in the quiet state is relatively stable, with systolic blood pressure of 90~139mmHg, diastolic blood pressure of 60~89mmHg, and pulse pressure of 30~40mmHg.

A systolic blood pressure ≥ 140 mmHg and/or diastolic blood pressure ≥ 90 mmHg is called hypertension.

A systolic blood pressure ≤ 90 mmHg and/or diastolic blood pressure ≤ 60 mmHg is called hypotension.

Whether it is high blood pressure or low blood pressure, it can be fatal in severe cases.

In particular, people with low blood pressure often ignore it because they feel that the consequences of low blood pressure are not as serious as high blood pressure. Common causes of hypotension are chronic malnutrition and thin body shape. People with low blood pressure usually have a significantly reduced immune function and are prone to infections in various systems throughout the body.

When the blood pressure drops to 70/40 mmHg, it can be life-threatening, and if it continues to fall, it can lead to cardiac arrest, leading to circulatory dysfunction, or circulatory failure due to organ dysfunction, which can lead to death. The patient's intuitive experience is blurred vision, malaise, drowsiness, and even fainting.

"So Hu Yuanling's death was caused by the blood pressure in her body dropping to a dangerous value?" I asked, puzzled.

Ren Qiushi nodded.

Hu Yuanling is a particularly thin girl, living alone, working very hard, and eating at the right time. In addition, the little girls nowadays are all thin and beautiful, and they will indeed have low blood pressure due to poor business.

However, it is impossible for blood pressure to drop to dangerous levels without external factors.

"What caused her blood pressure to go down?" I asked.

Ren Qiushi frowned, and replied very puzzled: "This is exactly the strange place, under normal circumstances, acute hemorrhage, septic shock, severe allergies, etc. will lead to the occurrence of hypotension. However, during the autopsy of Hu Yuanling, I did not find any of this, and she was still relatively healthy. ”

"So, this is another accidental death?" I said it weakly, because no one would believe it.

Especially after the investigation of Du Tan and Xu Kuan's accidental deaths, it was found that they were all murdered.

"I have already sent Hu Yuanling's blood, gastric solution and other biological samples for testing, and the results will be available early tomorrow morning." Ren Qiushi said lightly.

This time, he really had a problem.

The old rule, he asks the dead, I ask the living. The affairs of the dead are still to be left to him, and I can't help him with anything.

After leaving the Forensic Medical Section, I returned to the Serious Crimes Unit office.

Everyone in the room was staring at each other, and the atmosphere was extremely depressing.

Because there are no clues in this case for the time being, Chu Ming, the only one suspected of committing a major crime, has completely cleared the suspicion.

"Let's adjourn the meeting, everyone go back and have a good rest, and we will continue to visit and investigate tomorrow." I settled down and said in a deep voice.

After everyone left, only Li Meng remained in the office.

I looked at my watch, it was already off work, and asked her, "Why don't you go home?" ”

"I look at you, and it doesn't seem like you're ready to go home." Li Meng looked at me in a daze and asked me rhetorically.

I smiled and explained, "I'm going home by myself, I'm going to sleep in the office tonight, this case is a bit difficult, and there are many places where I need to think about it carefully." ”

Li Meng stood up, stretched a big lazy waist, and said a little lazily: "I'm hungry, do you want to go out to eat something, you have a treat." ”

"Okay." I replied casually, because I was also a little hungry, but I had just finished answering when I suddenly felt that something was not right, and Li Meng seemed to say that I should have a treat.

At this moment, a male duck's voice came from the corridor: "Old Qin! Lao Qin! ”

Listening to this voice, it was Ren Qiushi who came.

What is this kid looking for me? It can't be that you heard that I was going to have a dinner and came over to eat, right?! Am I not going to pay for my death today?!

"Old Qin! Lao Qin! I knew you weren't off work! Let's go, let's go, I'm in for a treat! Ren Qiushi walked into the office of the serious crime team very boldly.

He's such a person, cold as an ice cube when he works, and as passionate as a flame when he's not working, and I wonder if he has some split personality.

"Old Qin! Lao Qin! As soon as he entered the door, he suddenly saw Li Meng, and then greeted: "Li Meng hasn't gotten off work either." ”

At this moment, I suddenly understood that Ren Qiushi was here to pay for me!

I smiled, looked at Li Meng, and said, "Let's go, let's go, Ren is the section chief for a treat!" ”

"Okay, let's go, Li Meng, together." Ren Qiushi nodded, and unpretentiously sent an invitation to Li Meng.

Li Meng nodded and said, "Okay." ”

If you want to say that Ren Qiushi asked me for supper, it can be traced back to five years ago, when I was the captain of the criminal police team and often dealt with the forensic doctors of the forensic department, and slowly got to know Ren Qiushi and became a good friend.

But because of Ren Qiushi's overzealousness, he gave me a hug from time to time and let me smell the smell of corpses. So much so that many people think that we are not friends who are irreversible, but friends who have broken their sleeves.

The forensic department and the criminal police team are both special positions, and they often need to work overtime day and night, so we often have a late-night snack at a time. But sometimes I am so busy with work that I miss several times that I have already scheduled a supper.

This time I don't have time, but I have to slaughter him severely.

"What to eat, order whatever you want, Ren is the section chief for a treat."

At the barbecue stand, I handed the menu directly to Li Meng.

The corners of Ren Qiushi's mouth twitched a little and looked at me, and muttered, "Is this treating me as a wronged person?" Now I'm thankless not only to pay the bill, but also to be a light bulb for the two of you, alas—"

"What about light bulbs? Just pay for it, you say yes, little dream. I smiled and reached out to take Li Meng's waist.

Li Meng was looking at the menu, but he still keenly noticed the small movement in my hand, twitched the back of my hand hard, gritted his teeth and said, "Are you ready to go in a wheelchair?!" ”

My body trembled violently, and I felt my scalp tingle unconsciously, and quickly withdrew my hand.

"I'm going to eat crayfish!"

After Li Meng finished speaking, he looked at Ren Qiushi.

Ren Qiushi shouted very boldly: "It's okay!" Order whatever you want! Whatever you want! I will eat back from Lao Qin sooner or later, don't worry, I'm not a loser. ”

"Boss! Come five pounds of crayfish! Three beers! ”