Super Time Detective

Coming out of the kitchen, Ye Huairui followed Jiaer to the room where her grandmother lived.

If it is said that the two brothers Jiedong and Jienan, and even the accident with Timmy and Pakwan are suspicious to some extent, then the death of Ms. Du Juan should be the most normal and logical no matter who looks at it.

Even Jiaer believed that her grandmother, who had been ill for many years, had died due to her illness worsening.

The old man's room is on the second floor.

Judging from the layout and layout, we know that it has been deliberately arranged. Facing the south side with good light, the place is spacious and ventilated. A bamboo curtain is drawn in the middle to divide it into two spaces, inside and outside. It is a place for nannies and escorts to rest.

"I'm so sorry."

Jiaer opened the curtain, and said to Yin Jiaming apologetically:

"After grandma died, I haven't sorted out her belongings much..."

She led Ye Huairui into the inner room, she seemed to feel that her behavior was not filial, and there was some guilt on her face:

"So now most of them are still the same as before."

Ye Huairui was actually very happy to hear that Jiaer hardly touched anything in Ms. Du Juan's room, but it was hard to say it directly, so he just nodded slightly to show that he knew.

The most conspicuous piece of furniture in the room is a nursing bed, the head of the bed can be raised so that the patient can easily maintain a semi-sitting position.In addition, there are bed rails on both sides, and there are holes for inserting infusion rods in the four corners of the front, back, left, and right.

It's just that this bed has not been used for four full years, and the dustproof quilt cover is covered with dust.

Ye Huairui smiled, "Your equipment is quite professional."

"No way, grandma has been ill for almost ten years, and the two years before she left seemed to be getting worse and worse."

The girl sighed softly.

"After all, my father and uncle's cousin passed away one after another. Grandma was really sad, so..."

Jia Er was reminded of sad things, and her expression became more and more lonely.

She lowered her eyelashes, her voice choked with sobs, and the corners of her lips curled up, revealing a bitter arc.

"Fortunately... When grandma left, I was at home... Finally, I saw her off for the last time."

Jia'er whispered softly, not sure if she was speaking to Ye Huairui, or just to make herself feel better.

"Fortunately... Grandma walked away very peacefully... as if she was asleep, her expression was not in pain at all."

Ye Huairui raised his eyebrows, a little surprised.

He thought that Jia Er would be at school like Jie Dong and Timmy when they died, but he didn't expect to be at home.

"So, you watched Ms. Du Juan die with your own eyes?"

"Oh, that's not..."

Jiaer shook her head, "Grandma was in good spirits that morning, she ate a bowl of porridge at noon, and even offered incense to the Buddha."

The girl tried her best to recall the details at that time, and stumbled in Jincheng dialect, which was not very fluent, and said:

"Then she said she was feeling tight in her chest, so Diau took her back to her room to rest... I went to see her in the afternoon and saw that she was sleeping soundly, so I didn't bother her... In the end, I brought her food in the evening At the time, she had already..."

The more Jia Er spoke, the more sad she became. At the last few words, tears fell down again, and she couldn't cry again.

After all, she is only an underage girl, no matter how hard she tries to be brave, she must be very scared and helpless in such a situation surrounded by wolves and unaccompanied. When she mentions her relatives, it will inevitably touch the pain in her heart.

Ye Huairui felt that if he were 17 years old and in the same situation, he might not be as strong as her.

He only regretted that he didn't have the talent to coax girls, and he couldn't say a few nice words to comfort others, so he could only pat the girl on the shoulder lightly, waiting for her to calm down gradually.

Fortunately, Jiaer didn't cry for a long time.

Seeing that the girl stopped crying, Ye Huairui continued to ask:

"How was your grandma treated at home? Did she inhale oxygen?"

Patients with chronic obstructive pulmonary disease often need long-term oxygen therapy at home due to their condition, and the continuous oxygen inhalation time can be as long as ten to fifteen hours a day.

But Ye Huairui didn't see the oxygen therapy equipment beside the hospital bed, so he planned to ask Jia'er directly.

Sure enough, Jiaer nodded.

"Yeah, there is."

As she spoke, she walked a few steps to a wooden storage box in the corner, and pointed inside:

"Here, all the equipment is here."

Ye Huairui went over to take a look, and sure enough, he saw an old oxygen concentrator in the storage box, as well as masks, oxygen tubes, humidification bottles, etc. needed for oxygen inhalation.

He took all the things out of the box and put them on the ground one by one.

"Are these devices the same as when your grandmother passed away?"

Jia'er didn't understand the reason for Ye Huairui's question, but she nodded anyway.

Later, the girl told Ye Huairui that when she delivered food to her grandmother that day, she suddenly found that the old man had died on the hospital bed, and she was very panicked and terrified.

While calling for help, she removed the mask on the old man's face, and threw it aside.

Then she called an ambulance, and the doctor came to see her and confirmed that Ms. Du Juan was gone, so the funeral staff should take over.

While waiting for the funeral staff to arrive, Jiaer noticed that the oxygen generator beside her grandmother's bed was still on.

It's just that she doesn't know how to use this thing, and she doesn't know how to shut it down correctly, so she chose the stupidest method like all electrical novices, directly pressing the main switch, and then unplugging the power.

"Oh, right!"

The girl pointed to the empty liquefaction bottle:

"I also poured out the water in it..."

She looked at Ye Huairui timidly:

"Is there... a problem?"

"Well, there might be a little problem."

Ye Huairui pointed to the red button on the upper right corner of the oxygen concentrator, and confirmed to Jiaer again:

"Are you sure you only touched the master switch?"

Jiaer was even more frightened.

"Well, I, I should remember correctly..."

Her tone became less certain, and the eyes she looked at Ye Huairui became more apprehensive:

"So... what's the problem?"

"If there is any problem, let's try it and find out."

Although this oxygen generator is quite old, it is a model that uses molecular sieve physical adsorption. It does not need to add additional oxygen generators. In theory, it can be used again when it is powered on.

Ye Huairui dragged the oxygen generator to the hospital bed, filled the humidification bottle with water, connected the aerobic tube, restored everything to the way it was in use, and then plugged in the power.

With a "snap", he pressed the red master switch.

The oxygen generator made a humming noise and started running again.

The filtered gas is blown out from the gas outlet, and the small silver float on the flow meter also rises accordingly.

--really!

When Ye Huairui saw the flow scale displayed on the float, his eyes immediately changed.

"Look here."

Ye Huairui pointed to the scale on the flow meter to show Jiaer, "From 0 to 5, these scales represent the number of liters of oxygen per minute."

Jia Er was very confused and asked:

"What's wrong with that?"

Jiaer was only an eleven or twelve-year-old girl when this oxygen concentrator was added to the family. Her family did not allow her to play with such an expensive instrument, and there was a nanny and escort at home, so she was not needed at all. Go learn these.

"What's wrong is that the flow rate of oxygen is too high!"

Ye Huairui pointed to Jiaer with his fingers:

"Look at this float, has it floated between the scales of 3 and 4? This means that the oxygen flow rate must be at least three and a half liters per minute, which belongs to high-flow oxygen inhalation."

Jiaer blinked, and from the standpoint of a novice who has no relevant knowledge in this area, reasoned very naively:

"... Isn't the more oxygen the better?"

"No, of course not."

Ye Huairui looked up at Jia'er, and said word by word:

"For patients with COPD, high-flow oxygen can be fatal."

Jiaer: "!!"

Her eyes widened, she was so shocked that she didn't know what to do.

"it is true."

Ye Huairui explained to Jiaer that chronic obstructive pulmonary disease is a disease characterized by persistent airflow limitation, emphysema often occurs in the middle and late stages of the disease course, and there are obvious pulmonary gas exchange disorders, resulting in progressive aggravated breathing difficulty.

Current research shows that if patients with COPD receive long-term home oxygen therapy in a stable period, it will significantly help delay the disease and improve survival.

But this oxygen inhalation is particular.

In simple terms, it is "long time" and "low flow".

Long-term refers to oxygen inhalation for at least ten to fifteen hours a day, and may be extended in some cases.

And low flow, as the name suggests, the flow of oxygen inhalation must not be high, and must be maintained within the range of one to two liters per minute.

The reason why "low-flow oxygen inhalation" is necessary is that the gas exchange function of the alveoli of COPD patients is much weaker than that of normal people, and a large amount of gas fills the alveoli, making them extremely sensitive to the inhaled oxygen concentration.

If the inhaled oxygen flow rate is too high, the excess oxygen cannot be discharged, the carbon dioxide concentration in the body will be too low, and the respiratory center will be inhibited. Become unconscious.

These performances are very similar to those of drunk people, except that it is not the wine that makes them drunk, but the high concentration of oxygen.

If the state of high-flow oxygen inhalation is not lifted in time, the patient's coma will gradually deepen, and eventually he will die of suffocation due to respiratory alkalosis and depression of the respiratory center.

In most cases, people who suffocate to death will feel extreme pain due to lack of oxygen. When they die, they often have cyanotic lips and grim expressions.

But the patients who died of "drunk oxygen" are different.

They would gradually pass out in a drunken trance, and then step by step into death, their faces calm and soft, as if they were just asleep.

Ye Huairui noticed that when Jiaer described the appearance of Ms. Du Juan's death, she used the word "peaceful" and the metaphor "like falling asleep", and then she noticed that the oxygen flow rate of the oxygen generator was wrong.

"You... say... don't you mean..."

Jiaer's lips trembled, and her voice trembled when she spoke:

"My grandma... was, was... murdered to death?"