Grete practiced hard, practiced hard, practiced hard, and in the end, he was only sure of one thing:
The timing of direct current cardioversion was not something he, a level 7 mage, could control manually.
The window period is too short. The normal heartbeat rate of human beings is between 60 and 100 times per minute, that is, once every 0.6 seconds to every 1 second.
In atrial fibrillation, the heartbeat can reach 150 to 500 beats per minute. At its fastest, there is one heartbeat every 0.12 seconds.
During this heartbeat, the waveforms presented by the electrocardiogram are P wave, PR segment, Q wave group with the largest amplitude, ST segment and T wave, and QT interval. The discharge needs to be synchronized with the R wave. In this time window,
The shortest possible is only 4.8 milliseconds!
As for the reaction speed of the human brain and nerves, I remember the treatment in the previous life said that it is 30 milliseconds. Even if you advance to a level 7 mage and your mental power and reaction ability are enhanced, you will not be able to touch this obstacle...
Grete let out a long sigh. He tapped the crystal ball at the center of the mage tower with his fingers:
"Touch SS, you play the electrocardiogram again. Then, every time the R wave peak comes out, change the R wave waveform line to red."
"Boss, what is R wave?"
Gretel gave him a pointer, which was the narrowest and highest tip on the electrocardiogram. He was silent for about five seconds and then immediately answered:
"Okay, boss."
The light screen flickered again. The wavy electrocardiogram moved forward in a regular pattern. Gretel stared at the screen. When the peak of each R wave came out, the line must be changed to red, and then changed back when the peak of the wave was over. Very good,
very good……
Let’s just say that the tower spirit’s reaction speed is better than that of humans!
In previous lives, there were computers, high-speed computing chips, and automatic surface defibrillators. Before that, doctors wanted to use electric shock defibrillation to save the heart. Basically, it was just a gamble on probability.
thing.
Grete stood up happily, spread out the blank scroll, and began to copy spells. Well, this one is for electrocardiogram, and this one is for modified version of electric claw. After copying, he spread it out in front of the tower spirit:
"Touch SS, can you register these two spells?"
A ray of light fell on the spell scroll, sweeping across it inch by inch from beginning to end. Touching the SS flat tablet, a brisk voice immediately rang out:
"Entry completed, boss."
"Well...can you cast the electrocardiogram spell on me?"
"As long as there is authorization from the boss."
Grete readily gave the authorization. Then, he saw his electrocardiogram. Bang, bang, bang, the waveform was regular and perfect, and the heart rate was 55 beats/minute.
The strength of this body that has undergone a major improvement is indeed quite good, and even the heart rate has reached the level of an athlete!
Gretel silently gave himself a thumbs up. Then he continued to give orders to Talling:
"Touch SS, follow my electrocardiogram waveform, activate the electric claw spell every time the R wave peak appears, and hit it on the receiving board. Don't hit me! Hit the receiving board!"
"Of course, boss." Mo SS still has the same electronic sound without fluctuations, but the interval between each word has almost doubled:
"The tower spirit will never attack its master..."
Gretel felt that if this tower spirit had a "face", it would definitely show him the unhappiness on its face.
"Okay, touch the SS." Gretel pretended not to hear the emotion in his voice and gave the order briskly:
"Record the time of each electric shock and mark it on the electrocardiogram. One, two, three, start!"
"Crack!"
"Crack!"
"Crack!"
Blue-white electric light shone on the dark receiving board.
The corners of Gretel's mouth curled up. Taling automatically released the magic of electrocardiogram and electrical cardioversion. This treatment mode worked!
However, it is obviously impossible to let the tower spirit serve as an automatic defibrillator. If a patient with ventricular fibrillation is dragged to the mage tower for rescue, he will probably die on the way there.
The DC cardioverter must be made portable and preferably miniaturized!
"Touch SS, I said, remember." Gretel lazily ordered:
“If you want to build a mobile electrocardioversion facility, there are two ways to go:
The first is to try to connect the two magics in series and merge them into one. Let the magic recognize the crest of the R wave, automatically trigger the electric claw, and land on a fixed point on the patient's chest wall;
The second is to make a magic instrument and burn the linkage of [Electrocardiogram] and [Electric Claw] into it. The center of the magic instrument can be a magic crystal or something else. As long as it can intercept a small piece of the tower spirit's program, it can be controlled.
Props, automatic defibrillation.
Have you written it down?"
"Write it down, boss." Mo SS diligently handed over a large stack of draft paper:
"Boss, do you want to start designing now?"
Ah...it's great to have a tower spirit to take care of your life. Satisfied, Gretel pulled up a table and sat down, and began to design a new magic:
After the identification and judgment of defibrillable heart rhythms, it is recommended that users defibrillate quickly, and the functions can be added slowly. Anyway, the AED machines in the previous life were also added slowly...
He lowered his head and scribbled on the paper to make a rough draft, recording ideas for new magic. Well, the first step is to release the electrocardiogram magic;
In the second step, the user determines whether defibrillation is needed. If necessary, triggers the second magic;
The third step is automatic detection of magic. If the R wave appears, the electric claw will be triggered...
"I'm not a programmer!"
He threw the [Endless Ink Pen] aside and wailed loudly. This kind of [if...then] judgment triggering method, no matter how you look at it, it looks like writing a computer program!
I am a doctor, not a programmer... How to write conditional trigger magic, and how to connect magic configurations...
Gretel tried hard to search his memory, and wrote down one scroll, two scrolls, and three scrolls, but still couldn't get the point. He threw away the pen in frustration and leaned back on the seat:
No more writing!
Go check out the book in the library at Thunder Point tomorrow!
Hey, it would be great if the teacher was here. The teacher could at least throw a stack of reference books to him...
"Touch SS... grab a rabbit and bring it up, as well as the fixed plate that fixes the rabbit... I want to do animal experiments..."
He can only do animal experiments by being close to the tower spirit, which is too troublesome. One day, he will renovate this mage tower and get a branch center in each laboratory to help him control magic!
Grete calculated for a long time before he got the current intensity that should be used to perform DC cardioversion on the rabbit. When he turned around, the invisible servant had already carried the rabbit cage and had been waiting for a long time. The rabbit was chirping and screaming.
, the stench is all over the cage.
Gretel: "...Touch SS, next time I'm doing calculations, can you please ask the invisible servant to fix the rabbit, shave it off, and disinfect it? Don't even have to clean up the rabbit poop..."
"Okay, boss. Shall I do it now?"
"Forget it, I'll do it..."
Grete quickly fixed the rabbit, prepared the skin, sterilized it, and cast the hypnotic magic. After thinking about it, it was better to shock it directly from the chest wall instead of opening the chest as soon as it came up.
He hooked up the electrocardiogram magic to the rabbit, buried electrodes on the chest wall, and connected the direct current
One, two, three, press the switch!
Unfortunately, the current is too large, and it seems that the result is not atrial fibrillation...
Grete inhaled and exhaled, lowered his head and quickly calculated the approximate battery capacity, adjusted the coil, and turned it on again. Well, this time it should be fine.
Very good, atrial fibrillation!
"Touch SS! That spell just now!"
Lightning fell in response. Gretel trembled all over and his hair stood up straight:!!!
"...Touch SS, the next time you receive an electric shock for defibrillation, remember to give a warning, count down three seconds! The electric defibrillation is about to be released, please stay away from the patient, three, two, one!"
The action of touching the SS was too fast! Before he could let go, the electricity went off!
Fortunately, he always wears a full set of defenses, mage armor, cold and heat resistance, and elemental resistance. Otherwise, if the electricity from this electric claw falls on him, he will be electrocuted!
"Okay, boss!"
Gretel took two deep breaths. Looking at the rabbit again, it seemed that the calculated current was still a bit off. Not only was the rabbit not defibrillated successfully, but its vitality became even weaker...
"Touch the SS and bring up another rabbit..."
Gretel threw two healing spells at the experimental rabbit and stared at the electrocardiogram, watching it recover little by little. After a while, the door of the mage tower opened wide, and Bernard quickly walked in carrying two cages of rabbits and stood quietly aside.
.
Gretel conducted ten experiments in a row. Although the success rate of the experiments was not high, he at least proved one thing:
Using a certain intensity of current to pass through the rabbit's heart at the right time can restore the heart to normal beating!
Very good. When the teacher comes back, this research should be a good assignment...
Thinking like this, Gretel completely forgot that the Lord of Thunder required him to be proficient in releasing attack magic, not to make an electric defibrillator.
"Ah, Bernard, please carry the rabbits down!"
The disappointment on Bernard's face was visible to the naked eye. Grete knew without asking that he must have thought that there would be rabbits to eat today. But it was a pity that a bunch of healing spells were released on each rabbit to try to pull them back...
…
Gretel continued to improve his research with confidence, using 64 rabbits and writing a long paper. A few days after completing the paper, he received a letter from Archmage Carlisle:
"The teacher is back. Next Monday, the regular meeting will be held as usual, don't forget it!"
yeah!
The teacher is finally back!
There is someone to ask for advice, and there is a book list to ask for! These days, he has been flipping left and right in the Thunder Horn library, but he has not gained much!
Early on Monday morning, Grete was squatting at the teacher's door waiting. At 8:30 in the morning, people attending the meeting began to arrive one after another. As soon as Grete turned his eyes, his jaw almost dropped:
"Senior Brother Baierbo, Senior Sister Philby! What have you done?!" Why do you look so smoky?!
"Hey, little Gretel!" The senior brother's big, thick palm slapped Gretel heavily on the shoulder:
"What a pity you didn't go this time! Teacher led us to fight a big battle! Little Gretel, hurry up and advance!"
****
Yesterday, the final order was 2998...
Just two short...crying loudly...
There are no more ten extra chapters! Humph!
Thanks to @人说梦言 for the 100 starting coin reward
I took a look at the history of the development of cardiac defibrillation.
...The earliest record was in 1788, and then theory and practice continued to progress. In 1941, a defibrillator was made for internal defibrillation. In 1961, synchronized electrical cardioversion was invented...