It's not that hard to open a hospital in another world, right?

Rehydrating with spells—if you can—does have advantages over rehydrating with water.

Gretel spread out the manuscript paper, thinking while making plans.After all, hanging water is an invasive operation. Even if the pain of the patient is not considered, needle running and blood clotting are still problems.

Vascular injury, vascular fistula, bacterial infection, central venous catheter plus heparin, everything is a challenge——

If you can use magic, it is better to send the liquid directly into the patient's vein than to poke a hole in the blood vessel.

The development value of this spell is very high!

"So on the basis of which magic to change?"

One by one, Gretel browsed through the spells he knew and the list of spells.take a deep breath?The one that filled the lungs with gas, filled the blood vessels with fluid instead?

Detoxification?In the reverse version, injecting potassium ions into the blood vessels, instead of injecting a large amount of liquid?

Boiling blood?The kind that heats up an enemy's blood?Although it may not be easy to use, but it can accurately raise the added liquid to 37 degrees, which is very powerful...

Gretchen writes and draws, chooses one, negates another, chooses another, and negates another.After turning to the fifth-ring spells, I found one that seemed to have great potential:
"[Thalassemia]?" Elder Fahim, who came to see him, choked and tried not to frown:

"Little Gretel, this is a necromantic spell, you... have you learned it?"

Thalassemia, this magic can make the blood of living creatures that it touches become almost as thin as sea water, causing heavy damage.

Gretel estimated that its principle may be to extract blood cells, or it may be to replace blood-if it can be extracted, it can be filled, and it can be replaced, of course it can also be filled!
"I haven't learned it." Gretel replied confidently:
"But I can get the spell configuration. — Once I get it, it shouldn't be difficult to disassemble, analyze, and modify it?"

After all, he has even dismantled Eight Ring's [Clone Technique], Fifth Ring's [Thalassemia], the difficulty can't be higher, right?
Gretel communicated with Nevis, and sure enough, he got the spell configuration and detailed analysis of [Thalassemia], so he plunged into the research.

Of course, the daily sampling of chromosomes still needs to be taken, and the daily calculation of moving tower spirits and oak sticks cannot be missed.However, this does not prevent him from doing the calculations by himself, right?
Well, this configuration is used to lock the target of the spell.Although relying on touch to guide, the scope is all over the body of the caster, let's see if it can be narrowed down to a certain vein;
This configuration is used...is it really used to replace blood?Take it apart again to see how to change replacement to injection, and how to lock the injected liquid;
Injection speed... The spell of thalassemia is injected in an instant. It depends on how to adjust it...

Gretel buried his head in the study, and it took more than a month just to disassemble, modify, and refactor.The end result is a batch of different versions of the spell:

"Come on, get on the rabbit!"

"It's going to be a rabbit again..."

The elves working in the laboratory wailed.Together with the healers who were temporarily transferred back from the front battlefield to watch the experiment, they also showed a look of intolerance.

This time, however, no one protested to Gretel, or yelled "why use a rabbit" or something like that:

When he developed the blood-replenishing magic earlier, the lesson of Cusa Oak was really painful and profound.

They obediently lifted the rabbit out of the rabbit cage.Adult male rabbits and female rabbits, ten of each kind, were weighed, checked for vital signs, and 20ml to 50ml of blood were drawn respectively.

Hang up monitoring, pay close attention to heart rate, blood pressure, breathing and breath of life intensity, and shoot the magic of rehydration:

【Thalassemia·Change】!
Gretel held a small bottle in his left hand, filled with 50 milliliters of Ringer's solution, and adjusted the temperature to 38.8 degrees - exactly the normal temperature range of rabbits;
The spell in his right hand shone brightly, hitting the rabbit that had 50 milliliters of blood drawn from it.The Ringer's solution in the bottle was swept away, and the liquid was automatically injected into the rabbit's blood vessels under the effect of the spell——

Almost in the blink of an eye, the beam of light representing the breath of life fell directly from a wavering dark yellow to a deep red and black.

And the monitoring magic set by Gretel also frantically issued a warning:
"This rabbit is dead!"

"Heart rate 350! 402! 438!"

"breath rate……"

"blood pressure……"

"It's vomiting blood! It's vomiting blood!—no, it's not blood, it's pink foam..."

"It's going to die!!!"

Look, too much injection at one time, it really doesn't work.Gretel shook his head regretfully, and crossed out the first version of the rehydration magic:

"Everyone can see clearly that it is impossible to replenish a large amount of fluid in one minute or even one second. The heart is already weak due to a large amount of blood loss. If so much fluid is pumped out, the heart will be exhausted!"

The elf healers who had been transferred back from the battlefield and yelled, "How much blood has been bled, can't it be enough to shoot it all at once?" Facing the rabbit that died on the spot, they were speechless.

Gretel looked around at them.He had expected this result, but it was only speculated from the principle——

In the previous life, no one had done such an experiment. Whether it was the venous access or the bone marrow cavity, it was impossible to inject several liters of liquid into the human body within a second.

However, facing the dead rabbit, he still sighed:
"Also, if the heart pumps without bleeding, the excess fluid will seep into the alveoli, causing pulmonary edema and even pulmonary fluid. Once the heart and lung function collapses, the whole body will be ruined!

In hemorrhagic shock, when a large amount of fluid is infused, we must pay attention to the possibility of heart failure and pulmonary edema! "

This time, all the elf healers in front of Gretel nodded their heads.

Instantaneous input is not enough, you can only input slowly.In Gretel's previous life, there was no problem in infusing 2000 ml of liquid within an hour, but the patient's condition needs to be closely monitored;
When it really comes to bleeding, the blood on the operating table is like a waterfall, and the operation is performed while the blood is being transfused, the bone marrow cavity is opened, and 5000 ml of liquid is injected in an hour, and it can still be topped.

Of course, follow-up DIC (disseminated intravascular coagulation) and other blood transfusion complications are things to consider later.

After all, if you don't get a blood transfusion, you don't even have the qualifications to consider it...

Gretel used 5000ml of liquid per hour, and then 2000ml per hour, and adjusted this magic into more than a dozen different speed versions.

Plus the adaptive function - the liquid can't be filled all the time, until the rabbit or the subject is burst, you have to know when to stop - then, send it to the researchers under you:
"50 rabbits per person! Blood loss is 10%, 15%, 20%, 30% until 50%, try them all, and see which version is easy to use and which version is safe!"