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

Chapter 601 The Magic Method of Cardiovascular Angiography

To inject a contrast agent (healing potion) into the rabbit's heart, the battle was not bad.Gretel pulled himself together and made all the preparations:

Anesthesia!Before, it was all local anesthesia + binding, but now I am not stingy with spells, I must have full anesthesia!
EKG!Connect to the recording device, and keep an eye out for atrial fibrillation and abnormal heart rhythm!

Arrange for the invasive blood pressure monitor!A student stood next to him, staring at the mercury column without blinking, ready to report anomalies at any time!

Arrange the blood oxygen monitor!
The heart is a sensitive and delicate bastard, if you touch it a little, do some manipulations, it will give you problems at any time.What kind of arrhythmia, what kind of ventricular fibrillation, what kind of cardiogenic shock, cardiac arrest, and so on.

This is true of a normal heart, let alone a problematic heart.

When Gretel had a patent ductus arteriosus before, he tried countless times, and managed to control the vines so as not to touch the heart and blood vessels, and not cause spasms.Now to push the healing potion in...

God knows if the inner wall of the heart touches the healing potion, it will give you some moths to toss out.

"ready or Not?"

"Ready!"

Leon Carlos on the left and Pastor Matthew on the right answered together.Gretel took a deep breath, spawned vines, cut open the rabbit's femoral artery, and let the vines wind up along the femoral artery...

Hollow vines with a diameter of less than one millimeter travel up from the femoral artery, abdominal aorta, and thoracic aorta and enter the heart retrogradely.Then, the end of the vine opened slightly, and the end in Gretel's hand swelled slightly, one, two, three!

Draw back a small amount of blood to make sure there is no gas inside the vine.Then, attach the syringe and inject the healing potion!

In the meditation vision, the faint golden light of the healing potion only advanced less than a foot, and the speed became slower and slower.Finally, it disappears into the blood vessels and mixes with the blood.

"Uh... Teacher..."

"Uh... Gretel..."

On the left and right, two spellcasters who turned on [Detect Magic] and stared at the rabbit looked at Gretel together.Gretel shook his head helplessly:
"Oh, the pressure is too small..."

No way, how powerful the heart pumps blood.The pushing pressure is too low to withstand the blood pressure of the arteries, and the contrast agent cannot be pushed in place at all, and will only be pushed back in reverse!
Again!
Still not working, the push force is still not enough.Need to be faster and stronger!
Gretel waved the vines, stopped the bleeding of the rabbit's femoral artery, stared at the invasive sphygmomanometer, and began to calculate:
An invasive sphygmomanometer inserted in the brachial artery reads...

Converted to the blood pressure at the aortic root, it should be...

The pressure at which he pushes the contrast agent should be... The speed at which he pushes the contrast agent should be...

"I go!"

Gretel suddenly called out.The spellcasters next to him looked at him inexplicably, watching him click and click the syringe, almost steaming from his forehead:
According to the results he calculated, basically within 1/4 second, with a pressure of 130 mm Hg, inject 2.5 ml of healing potion into the rabbit's heart!And injection pressure...injection pressure...

What the hell is 3 mm Hg!
Thirty thousand!
Gretel's eyes darkened.

Is he wrong? !

Gretel sincerely hoped that he had miscalculated.But he did remember that in the hospital in his previous life, a high-pressure syringe was used for cardiac angiography.That thing is not a needle, but a machine with various parameters to adjust.

At that time, he really didn't pay attention to the specific parameters...

If the injection pressure really needs to be so high, then this figure is simply not achievable by hand!Only by high-pressure injectors, with the help of mechanical and electronic power!

Reason told him: It’s not bad, just try it out.Moreover, he can really achieve the simple method and simple conditions for this kind of experiment.

"I'll give it a try!"

Leon Carlos watched inexplicably as Gretel dropped the rabbit and ran out of the laboratory.He hurriedly followed behind, watching Grete rummaging through the box, finding out the mercury tank, inserting the syringe under the mercury, and pressing the plunger of the syringe...

Can't press it.

Can't press it at all.

I want to use the power of my thumb to push 1 milliliters of water into the mercury at a depth of 10 centimeters within 13 second... Just dream, even with this strength, the friction of the glass syringe is not enough; I want to have enough friction force, the strength of the syringe is not enough...

Or... try another way?After thinking about it, Gretel came up with a second solution:

Construct a metal bracket with Transfiguration, secure the syringe to the stand, attach the vine, and insert it deep into the bottom of the mercury.Add a [Advanced Magic Weapon] to the syringe to increase its strength; then, stand a little further away——

"[Magic Missile]!"

Bang!
The magic missile hit the piston head accurately.Fortunately, the syringe did not shatter, but went straight forward; luck was even better, the shelf withstood the test and did not fall down.

In an instant, the liquid in the piston was pushed vigorously, and all of it shot into the bottom of the mercury, pushing away a small cloud of transparent liquid.

"Yeah! It worked!"

Gretel jumped to his feet and cheered.He tried a few more times, found the optimal output of [Magic Missile], and happily returned to the operating room with the metal bracket in his hand.Magic version high pressure injector, success!

Fix the stent, attach the syringe, attach the vine, and try again for the angiogram.The vines traveled up the femoral artery and into the rabbit's heart.Pull back, attach the syringe, one, two, three!

【Magic Missile】!
Under the vision of meditation, the pale golden image of the healing potion moves forward quickly along the catheter, forward...

"Oh!"

The vines exploded.

The magic-generated vine, after all, is only a plant-like existence, and the tube wall is not strong enough...

Uh...

Gretel tried again, tried again, tried again.He finally found out sadly that even if he is a sixth-level magician, a sixth-level priest of the God of Nature, the vines he spawned...

Also not strong enough.

It's tragic.

So, in the end, is it still stuck on the material?
The assistants on both sides looked at him with happy and sad faces, cheered for joy, and depressed for a while.Pastor Matthew asked cautiously:
"Grete, what happened? Can we help?"

Gretel wiped his sweat, and briefly explained the purpose of his experiment, the concept of the experiment, and the difficulties he encountered.Pastor Matthew listened silently, thought for a moment, and made a serious suggestion:
"With so much pressure in the arteries...why not go through the veins?"

...that's a really good question.Gretel wiped off the second sweat, sat down on the round stool in the corner, and said in a tired voice:

"What is the path of blood circulation?"

As for the path, Pastor Matthew has worked in the hospital for so long, but he has really read the information.However, when he was asked to say it for a while, he couldn't say it.Gretel glanced away, and Leon Carlos took a step forward with a loud voice:

"From the left ventricle to the aorta, to the arteries, back from the veins, to the right atrium. Right atrium to right ventricle, right ventricle to pulmonary artery, pulmonary vein back to left atrium, left atrium to left ventricle, again into the aorta."

"Ah... oh!"

Pastor Matthew went around following his description and suddenly realized.Therefore, if the healing potion is injected from the vein, it enters the right atrium from the vein, then goes around the lungs, and then goes to the left atrium.

In that case, the amount of healing potion needed would be too large.

And one thing to say, healing potions cannot replace blood after all.No one can say what the consequences will be if a large amount of healing potion is injected into the heart and circulates in the blood vessels of the lungs.

"It really doesn't work, so I have to try it from the vein..."

Gretel groaned softly.Barely standing up, he spawned vines again, ascending from the rabbit's femoral vein.This time, 2.5ml of healing potion was pushed into the rabbit's heart and into the lungs, and it disappeared immediately;

Push in 5ml at a time again, still nothing;
Increase the dosage of the healing potion to 10ml or 20ml. Finally, the golden light of the healing potion appeared on the image of the return of the pulmonary veins.However……

"Beep beep beep—"

The cloud screen of the electrocardiogram was fatally alarming.Gretel turned his head to look at the waveform, and scanned the blood oxygen monitor by the way, and immediately scattered the vines, and began to press the rabbit's heart:
Ventricular fibrillation!The color of the blood oxygen monitor showed an ugly dark red instead of a vibrant bright red!

It must be that the potion was pushed too much, replacing the blood, and the heart was deprived of oxygen...

The first attempt failed.The second attempt failed.After failing three times in a row, Gretel sighed and rejected the plan:

"Let's think about it, how to withstand the arterial pressure..."

It's really a headache if you can't learn materials.But think about the materials of future interventional catheters, such as polyamide, polyurethane, hydrophilic coating, tensile strength, blood compatibility, biocompatibility...

Gretel still felt that he wouldn't be able to live another two lifetimes, so he had to figure out a way on the vines.

The strength cannot be reached, what other ways can I get around it?If only he had enough attainments in space magic, he could cross the space and send the healing potion directly to the place...

"That...or, let the vines swallow the potion, and then spit it out again?"

Pastor Matthew suggested with an open mind.Just as Gretel was about to say, "Are you kidding?", his heart suddenly moved:
That's right!
I am a vine, not a conduit!It is alive, not dead!It can be spawned, and it can be controlled to deform!

Through the continuous push inside the vines, the healing potion can be sent directly to the front end, and stored together, and then the vines at the front end will dissipate directly!

Anyway, the aortic arch is also relatively thick, much thicker than the femoral artery. Let the vines grow thicker at this section, accommodate more healing potions, and not touch the aortic wall. This method...

More doable than fiddle with high-pressure syringes to death, no?
Just do it.Gretel jumped up from the round stool, rubbed his fists, and went into the experiment again.This time, the vines kept wriggling, and the front end swallowed the healing potion, growing thick and strong.Finally, with a plunge into the heart——

The pale golden magic image finally exploded perfectly in the rabbit's left atrium.

success!

****
Ask for subscription, ask for monthly pass, ask for recommendation ticket, ask for book review, ask for various...

To be honest, I checked the information today and found the injection pressure of the cardiovascular contrast agent. The left ventricle in children is 600psi (pound force per square inch)... I was shocked when it was converted into mmHg... 31028 mmHg!

ps: A 10ml potion for treating minor injuries costs 50 gold coins.Let's do the math, how many gold coins have been soared up to now?

(End of this chapter)