It's not that difficult to open a hospital in another world, right? Chapter 596: The Magical Method of Cardiovascular Imaging (Go to bed when you are tired and get a ten thousand reward plus update 3)
Chapter 596: The Magical Method of Cardiovascular Imaging (Go to bed when you are tired and get a ten thousand reward plus update 3)
It was a battle to inject contrast agent (therapeutic solution) into the rabbit's heart. Gretel cheered up and made all preparations:
General anesthesia! Before, it was local anesthesia + bandage, but now I don’t skimp on spells, I have to have general anesthesia!
Electrocardiogram! Connect the recording device and pay attention to whether there is atrial fibrillation or abnormal heart rhythm at any time!
The invasive sphygmomanometer is arranged! There is a student standing next to him, staring at the mercury column without blinking, ready to report abnormalities at any time!
Arrangement for blood oxygen monitor!
The heart is a sensitive and delicate bastard. If you touch it a little or do some operations, it will cause you problems at any time. Arrhythmia, ventricular fibrillation, cardiogenic shock, cardiac arrest, all kinds of things.
Come.
This is true for normal hearts, let alone a heart with problems.
When Grete had a patent ductus arteriosus, he tried countless times before, but he finally managed to control the vines from touching the heart and blood vessels, and from causing spasm. Now he had to push the healing potion in...
God knows if the inner wall of the heart touches the healing potion, it will cause some trouble for you.
"ready or Not?"
"Ready!"
Leon Carlos on the left and Pastor Matthew on the right answered together. Grete took a deep breath, spawned vines, cut the rabbit's femoral artery, and let the vines snake up along the femoral artery...
The hollow vine with a diameter of less than one millimeter went up from the femoral artery, abdominal aorta, and thoracic aorta, and entered the heart retrogradely. Then, the end of the vine opened slightly, and the end in Gretel's hand expanded slightly, one, two, three
!
Draw back a small amount of blood to make sure there is no gas inside the vine. Then, connect the syringe and inject the healing potion!
In the meditation field of vision, the faint golden light of the healing potion only advanced less than a foot, and the speed became slower and slower. Finally, it disappeared into the blood vessels and mixed with the blood.
"Uh...teacher..."
"Uh... Gretel..."
On the left and right, two spellcasters turned on [Detection Magic] and stared at the rabbit. They looked at Grete together. Grete shook his head helplessly:
"Oh, the pressure is too little..."
There is no way, the power of the heart to pump blood is so huge. The pushing pressure is too small and cannot withstand the blood pressure of the arteries. The developer cannot be pushed into place at all, and will only be pushed back!
Again!
Still not working, the pushing force is still not enough. It needs to be faster and stronger!
Grete waved away the vines, stopped the bleeding in the rabbit's femoral artery, glanced at the invasive blood pressure monitor, and began to calculate:
The invasive blood pressure monitor inserted into the brachial artery reads...
Converted to the blood pressure at the aortic root, it should be...
The pressure with which he pushes the contrast medium should be... The speed with which he pushes the contrast medium should be...
"I go!"
Grete suddenly shouted. The casters next to him looked at him inexplicably, watching him click the syringe, and steam almost came out of his forehead:
According to the results he calculated, it was basically necessary to inject 2.5 ml of therapeutic potion into the heart of the rabbit within 1/4 second under a pressure of 130 mm of mercury! And the injection pressure... the injection pressure...
It’s 30,000 mm of mercury!
Thirty thousand!
Grete's eyesight went dark.
Did he make a miscalculation?!
Grete really hoped that he had made a mistake. But he did remember that in the hospital in his previous life, a high-pressure syringe was used for cardiac imaging. That thing was not a needle, but a machine with various parameters to be adjusted.
He really didn't pay attention to the specific parameters at that time...
If the injection pressure really needs to be so high, then this number cannot be achieved by hand pressure at all! It can only be achieved by relying on a high-pressure syringe, with the help of mechanical and electronic power!
Reason told him: You are right, you will know after you try it. Moreover, he can really achieve the simple method and simple conditions for doing this kind of experiment.
"I'll give it a try!"
Leon Carlos watched inexplicably as Grete dropped the rabbit and ran out of the laboratory. He hurriedly followed behind and watched as Grete rummaged through the cabinets, found the mercury tank, inserted the syringe under the mercury, and pressed the syringe hard.
piston……
Can't press it.
Can't press it at all.
I want to use the power of my thumb to push 10 ml of water under 13 cm of mercury in 1 second... Dream on, even with this power, the friction of the glass syringe is not enough; I want to have enough friction
The strength of the syringe is not enough...
Otherwise... try another method? Gretel thought about it and came up with a second method:
Use deformation to construct a metal bracket, fix the syringe on the shelf, connect it to the vines, and insert it deeply into the bottom of the mercury. Add a [Higher Demonized Weapon] to the syringe to increase its strength; then, stand farther away——
"[Magic Missile]!"
Bang!
The magic missile accurately hit the piston head. Fortunately, the syringe did not break, but flew straight forward. Even better luck, the frame withstood the test and did not fall down.
In an instant, the liquid in the piston was pushed hard, and all the liquid was injected into the bottom of the mercury, pushing away a small group of transparent liquid.
"Yeah! It worked!"
Grete jumped up and cheered. He tried a few more times and found the optimal output of the [Magic Missile]. He happily returned to the operating room holding the metal stent. The magic version of the high-pressure syringe, success!
Fix the stent, connect the syringe, connect the vine, and try cardiovascular angiography again. The vine goes up along the femoral artery and probes into the rabbit's heart. Pull back, connect the syringe, one, two, three!
【Magic Missile】!
Under the vision of meditation, the image of a pale golden healing potion quickly moved forward along the conduit, forward...
"Bang!"
The vine exploded.
The vines spawned by magic are still of a plant nature after all, and the pipe walls are not strong enough...
Woo...
Gretel tried again, and again, and again. He finally sadly discovered that even if he was a sixth-level magician and a sixth-level priest of the God of Nature, the vines he spawned...
It also doesn't have enough strength.
That's very tragic.
So, in the end, it’s still stuck on the material?
The assistants on both sides looked at his face, sometimes happy, sometimes worried, sometimes cheering, sometimes holding their heads in frustration. Pastor Matthew asked carefully:
"Grete, what happened? Can we help?"
Gretel wiped his sweat and briefly explained the purpose of his experiment, the experimental concept and the difficulties encountered. Pastor Matthew listened silently, thought for a moment, and made a serious suggestion:
"If the pressure in the arteries is so high...why not go through the veins?"
...This is really a 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?"
Regarding the path thing, Pastor Matthew has actually read the information after working in the hospital for so long. However, when he was asked to speak for a moment, he couldn't tell. Grete glanced at it, and Leon Carlos took a step forward with a loud voice.
:
"From the left ventricle to the aorta, then to arteries at all levels, and back from veins at all levels, into the right atrium. The right atrium goes to the right ventricle, the right ventricle goes to the pulmonary artery, then returns from the pulmonary vein to the left atrium, the left atrium goes to the left ventricle, and again
Inject into the aorta."
"Ah...oh!"
Pastor Matthew followed his description and suddenly realized. Therefore, when the therapeutic potion is injected into the vein, it enters the right atrium from the vein, then circulates in the lungs, and then reaches the left atrium.
In that case, the amount of healing potion required would be too large.
Moreover, there is a saying that 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 from the vein..."
Grete lamented in a low voice. He reluctantly stood up, once again spawned vines, and ascended from the rabbit's femoral vein. This time, he pushed in 2.5 ml of healing potion, which dispersed from the rabbit's heart into the lungs, and was gone immediately;
Pushed in 5 ml again at once, still nothing;
The dosage of the treatment potion was increased to 10 ml or 20 ml. Finally, the golden light of the treatment potion appeared on the image of the pulmonary vein returning. However...
"Beep, beep, beep -"
The electrocardiogram cloud screen gave a life-threatening alarm. Gretel turned his head to look at the waveform, scanned the blood oxygen monitor by the way, immediately waved away the vines, and began to press the rabbit's heart:
Ventricular fibrillation! The color of the blood oxygen monitor shows 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 starved of oxygen...
The first attempt failed. The second attempt failed. After three consecutive failures, Gretel sighed and rejected the plan:
"Let's think about how to withstand the arterial pressure..."
It’s really a headache if I don’t pass the material science. But think about the materials of future interventional catheters, such as polyamide, polyurethane, hydrophilic coating, tensile strength, blood compatibility, biocompatibility...
Gretel still felt that if he could live with his liver for another two lifetimes, he might as well find a way on the vines.
The strength cannot be reached, what other ways can we get around? It would be great if he had enough knowledge in space magic and could cross the space and directly deliver the healing potion to the place...
"Well... how about letting the vines swallow the potion and then spit it out on the ground?"
Pastor Matthew made an imaginative suggestion. Gretel was just about to say, "Are you kidding me?" when suddenly something came to his mind:
That’s right!
I am a vine, not a conduit! I am alive, not dead! I can induce birth and control its deformation!
It would be great if the healing potion could be sent directly to the front through continuous pushing from inside the vines, accumulated together, and then dissipated directly from the vines at the front!
Anyway, the aortic arch is also thicker, much thicker than the femoral artery. Let the vines grow thicker in this section to accommodate more healing potions without touching the aortic wall. This approach...
It's more feasible than fiddling with high-pressure syringes to death, isn't it?
Just do it. Gretel jumped up from the round stool, geared up, and once again plunged into the experiment. This time, the vine continued to squirm, and the front end swallowed the healing potion, growing thicker and stronger. Finally, it plunged into the heart——
The pale golden magic image finally exploded perfectly in the left atrium of the rabbit.
success!
****
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To be honest, I checked the information today and found out that the bolus pressure of cardiovascular contrast agent is 600 psi (pounds force per square inch) for pediatric left ventriculography... I was shocked when I converted it to millimeters of mercury... 31,028 mm of mercury!
ps: A 10ml potion for treating minor injuries costs 50 gold coins. Let’s do some calculations. How many gold coins have been lost so far?