'Under the plateau environment, the atmospheric pressure and oxygen partial pressure gradually decrease, and the oxygen supply is obstructed, resulting in an increase in the anaerobic metabolism of brain cells, a decrease in ATP production, dysfunction of the sodium ion pump in the brain cell membrane, and retention of sodium and water in the cells, causing cytotoxic brain edema. .
If timely rescue is not possible, it will become a vicious cycle of [cerebral hypoxia-cerebral edema-increased intracranial pressure-cerebral circulation disorder-difficulty in blood oxygen diffusion-cerebral hypoxia]. '
Li Ang thought silently. High-altitude cerebral edema is more common in people who quickly enter a plateau of more than 4,000 meters. It can cause severe headache, vomiting, palpitation, shortness of breath, and unresponsiveness in the early stage. In severe cases, it can turn into coma.
The altitude of Chang'an is about 400-700 meters, while Taibai Mountain in Qinling Mountains is more than 3,700 meters high. But the two places are two hundred miles apart. It is impossible for this tattooed man to climb Taibai Mountain, suffer from altitude sickness, and then transport him back on a galloping horse.
If it's not high mountains or plateaus, it should be a low-pressure, low-oxygen environment similar to the conditions on mountains and plateaus.
For example, artificially created low-pressure chambers, or using flying swords to carry people into the air quickly—this should also be able to induce high-altitude cerebral edema.
However, Pu Liuxuan once mentioned that there is a strong wind high in the sky above the earth's surface, which is blowing and raging all the time. The higher you go, the more dangerous the strong winds of heaven and earth become.
Even strong armor made of fine steel will be crushed into mud in the blink of an eye if thrown into the high wind layer.
No obvious trauma could be seen on the tattooed man's body, and it probably wasn't caused by rapid flight.
Alien? Magic? Or something else...
Li Ang thought for a moment and stopped delving into it - Jiao Cheng and others remained silent, obviously hiding secrets and unwilling to answer.
"Here are the ice cubes!"
Di Wu and others brought ice cubes and wooden barrels.
Not long after, the men who went to Dongshi to buy kelp and gypsum also came back.
"Smash the big ice cubes, put them in bags, and cover his body and head."
Li Ang gave the order and asked Di Wu and others to cover the unconscious man's body with ice.
This can reduce cerebral blood flow, reduce brain metabolic rate, promote the recovery of injured brain cells, and alleviate the vicious cycle caused by hypoxia.
'The treatment for high altitude cerebral edema is to first lower the altitude, rest in bed, and keep breathing smooth. Then comes hypothermia therapy and oxygen.
High-concentration and high-flow oxygen inhalation can correct the hypoxic state of the brain and break the vicious cycle. '
Li Ang said silently, 'The problem is that there is no high concentration of oxygen now.
Calcium peroxide, hydrogen peroxide, manganese dioxide, etc. cannot be obtained in a short time, and the electrolyzed water method requires continuous and stable power. '
The lightning talisman and the lightning strike technique are both talismans and techniques of the Patrolling Cloud Realm, and they don't seem to be stable enough. When enough high-concentration oxygen is produced, the day lily becomes cold.
'The only way is to use drugs to reduce intracranial pressure and improve cerebral circulation. '
Li Ang looked at the large amount of kelp bought by Jiao Cheng's men.
These kelp have been dried in the sun, and there is a layer of white frost on the surface that looks a bit like mildew.
'The white frost precipitated on the surface of dried kelp is actually mannitol, an isomer of sorbitol. Mannitol tastes similar to sucrose. It is one of the most commonly used drugs for the rescue of brain diseases. After injection, it can quickly increase the plasma osmotic pressure, allowing water in the tissue to enter the blood vessels, thereby reducing intracranial pressure and intraocular pressure, and relieving cerebral edema. '
Li Ang's mind flashed with information about mannitol, and asked Jiao Cheng's men to cover the barrel with several layers of cleaned gauze.
Then wash the kelp with water, scrape off the white frost on it, and pour the water melted with white frost into the wooden barrel.
The gauze acts as the first layer of filtration, filtering out sand and dirt on the surface of the kelp.
The second step is flocculation.
Li Ang opened the gauze covering the bucket, wrapped the wooden stick with plaster, and then put the wooden bucket into the bucket for stirring.
The best flocculant should be chitosan or carboxymethyl chitosan, or aluminum sulfate or iron sulfate, which can adsorb and separate colloids.
Plaster...let's make do with it.
"It's just fine."
Li Ang stirred for more than seven minutes. When he saw that the solution gradually settled and became clear, he stopped stirring.
After a few minutes, the turbid matter settled down and the solution in the barrel stratified.
Li Ang brought a ceramic bottle and filled it with the supernatant.
The standard treatment for cerebral edema is intravenous infusion of 20% mannitol.
The solubility of mannitol here may be around 2%-2.5%, which is far from the concentration and hygiene standards for intravenous infusion. The quality is not enough, but the quantity is enough. Drinking is enough.
Li Ang asked someone to pour the solution in the bottle into the unconscious man's mouth.
At the same time, people continued to replace the ice pack on the unconscious man, and then stood aside and started waiting.
After an unknown amount of time, the tattooed man finally opened his eyes and looked weakly to the side, trying to remove the cold ice pack covering his body.
Seeing that the other party regained consciousness, the cerebral edema was temporarily relieved.
Li Ang turned to look at Jiao Cheng and said calmly: "When he wakes up, keep lying down for seven days. If the symptoms worsen, feed him the filtered kelp soaking liquid using the method I just used. Don't drink too much, or you will die if you drink too much. .
Now, it’s time to deliver on your promise. "
The comatose man was a pawn of the scumbag Jiao Cheng. The sequelae of cerebral edema and recovery were completely out of Li Ang's consideration.
Jiao Cheng looked away from the unconscious man and nodded towards Li Ang. The bald Di Wu turned around and led Li Ang out of the house and walked upstairs.
"You also leave."
After Li Ang left, Jiao Cheng waved his hands to the subordinates in the room and dismissed everyone including the two swordsmen.
He walked to the tattooed man's hospital bed, held the other man's hand tightly, his eyes flashed, and lowered his voice: "Sanlang, tell me, what did you see in the Sword Immortal's Tomb below the Chang'an Ghost Market? ..."
————
"The sun rises..."
"Let's talk after we get out."
In the room upstairs, Li Ang raised his hand to stop Song Shaoyuan, and led him and You Douzhi out of the pavilion under the leadership of Di Wu, where he met Wu Shiqi who had been staying in the open space in the courtyard.
"Jun Li Xiaolang."
When Wu Shiqi saw Li Ang, he immediately stood up from the stone and bowed his hands more respectfully.
He was not surprised that Li Ang was able to leave the pavilion safely. What was surprising was that he was able to bring Song Shaoyuan and You Douzhi out at the same time - you know that You Xiao is the money tree of Lianhua Tower.
And her attempt to escape definitely touched Jiao Cheng's back scale.
Li Ang... was able to take the two of them away safely...
Li Ang didn't pay attention to Wu Shiqi's trance and surprise, and cupped his hands towards him, "Brother Wu, thank you very much this time."
"ah--"
Wu Shiqi came back to his senses and hurriedly returned the favor, saying repeatedly, "Don't you dare, I'm just leading the way."
"Mr. Li Xiaolang, we are now clear."
Di Wu looked at Li Ang with twinkling eyes, and the underlying meaning was very obvious - nothing happened in the attic today.
"Well, I'll send you the rest of the money then and it'll be settled."
Li Ang nodded calmly and led the three of them out of Pingkangfang.
Wu Shiqi left first on the grounds that he had to perform official duties as a bad person.
Song Shaoyuan and You Douzhi stood in front of the wall of Pingkangfang, feeling the warm sunshine covering their bodies.
The despair and helplessness in the attic house an hour ago was like a dream.
It feels like a world away.
"The sun rises,"
Song Shaoyuan turned around and looked at Li Ang, bowed to the end, and said sincerely and gratefully: "This time... I'm sorry to trouble you."
"Brother, why are you talking so much? Even for Aunt Song's sake, I can't leave you alone."
Li Ang waved his hand casually and glanced at You Xiao who was standing aside, "You know, I have made an agreement with Jiao Cheng that you have separated from Lianhua Building and can move out.
After waiting for a while, I was completely freed from slavery, and I could ask someone to go to Lianhua Building to bring out my daily necessities.
If there is a personal maid or something that needs to be redeemed, we can also discuss it. "
You Duzhi thanked Li Ang in every possible way. After being dissuaded by Li Ang, he took half a step back and leaned on Song Shaoyuan as gently as a bird clinging to someone.
The two of them looked at each other with affection, and the love in their eyes almost melted each other.
'Aunt Song, I was wrong. Chang'an is really a devil's cave that eats people without spitting out their bones...'
Seeing Song Shaoyuan being completely captured by love, Li Ang shook his head helplessly, called a carriage, and took the two people back to the West Market to inform Yang Yu and other classmates who were still waiting in the West Market to tell them that the matter had calmed down.
He also told Chai Cuiqiao at home not to worry.
Li Ang held the reins of the horse and walked slowly to the west, thinking about things casually.
Methods for extracting mannitol from kelp under modern industrial conditions,
It has to go through complex steps such as soaking, purification, acidification and oxidation, iodine extraction, evaporation, concentration, cooling and crystallization, centrifugation, drying and so on.
The mannitol solution he just extracted using kelp infusion was just a crude medicine under crude conditions.
Modern medicine is medicine based on modern science and modern industry.
Mannitol is already so difficult to obtain, and other emergency drugs such as epinephrine, cedilan, sodium nitroprusside, and lidocaine are even more difficult to obtain...
A child's laughter, like silver bells, interrupted Li Ang's thoughts.
I saw a group of seven or eight-year-old children beating tops of different colors with ropes in the open space, making the tops collide with each other.
Gyro battle, right?
The corner of Li Ang's mouth raised slightly, inexplicably thinking of the childish behavior of secretly adding weights to the top to increase the lethality in the top battle.
etc...
Gyro...
Centrifugal force? !
Li Ang's eyes suddenly lit up, and he suddenly thought of something.
Duke Yan's illness can be cured.
