Do you want to come back from the dead? Do you want to be frozen like Captain America in The Avengers/kloc-wake up in 0/00 years? Russian company freezes the body and waits for recovery. It only takes 2.2 million rubles to freeze the whole body. Is it too expensive? Then 80 thousand, freeze your brain first. According to the company, they freeze the dead, and the dead must do it 36 hours after death. The blood vessels of the deceased will be injected with chemical preservatives to prevent frostbite of organs. The body was then stored in-196 degree liquid nitrogen, waiting for future recovery. At present, the company has frozen 54 people and signed more than 300 customers.
Although cryonics is alarmist at first glance, it is at least much better than Egyptian mummies thousands of years ago. Some organs may be used again after a certain period of time after freezing. As for the technology of cryopreservation and resurrection of human body that we are talking about today, modern medicine is currently impossible. We only hope that medicine can be done in the future. After all, our current medical technology is beyond our reach in the past.
Let's take a look at how the first human body freezing technology in China was carried out.
I. Antifreeze
Tissues and organs can't be frozen directly, and the water in the cells will freeze and break the cells. How to avoid this situation is a problem to be solved in deep hypothermia medicine. Cryopreservation solution is a substitute for water to support cells from rupture.
Second, the preparatory work
Injecting drugs: Injecting anticoagulants, antioxidants, antibacterial drugs, central nervous system nutrition and other drugs to prevent blood coagulation.
Physical cooling: rapid injection of physiological saline through the circulation system for physical cooling.
Maintain physiological function: maintain oxygen and blood supply function through cardiopulmonary support equipment.
Third, perfusion
Firstly, the residual blood in the remains was gradually replaced with diluted protective solution, and the common artery and vein in the neck of the remains were opened to form a liquid input loop, and the protective solution was input. Finally, the residual blood in the head was replaced.
Fourth, freezing.
Preliminary freezing: after perfusion, gradually reduce the temperature of the remains with dry ice at -60℃, and finally store the remains in an ice coffin at about -40℃, and then separate the heads of the remains and store them in a special container for liquid nitrogen at-196℃.
V. Revival
According to the optimistic estimation of Alcor scientists, 50 years later, science and technology may make the freezer thaw the head and rebuild the body-complete the resurrection.
After the brain stops working and is defined as "physical death" by medicine, if it can really be resurrected in the future, will its personal memory and personality be preserved?
The textbook of medical physiology published by Dr. Arthur C. Guetten, American psychophysiology, mentioned that memory is not determined by the continuous activities of the nervous system. It can completely inactivate the brain by freezing technology or anesthesia. When the brain is activated again, the memories previously stored in the brain can be preserved.
Generally speaking, our brain can slow down its biological process by means of low temperature freezing, anesthesia and so on. Brain activity is a very important example. Professional surgery combined with low-temperature freezing and other means can temporarily stop the brain from working, and then restart the operation for resuscitation after a while. Simple cardiac arrest can also cause EEG activity to stop for 40-50 seconds, and the heart can be stopped for so long without causing permanent damage. Anesthetics such as barbiturates can stop EEG for several hours under the condition of allowing later recovery. Patients who have been induced by drugs to eliminate long-term brain activity will not become blank after experiencing coma. Obviously, humans don't need to run continuously like computer chips. Our brains keep long-term memories in physical structures, not short-term electrical patterns.
Cryopreservation
For a real example, there was once a Norwegian skier named Anna Ba Gen Homer who accidentally fell into a glacier while skiing. He was trapped in the river for 40 minutes without breathing or heartburn for two hours. When he was rushed to the hospital, his ECG and EEG showed no signs of life. But magically, it was finally saved, its memory was not damaged, and it remembered what happened at that time. This case also shows that our long-term memory, thoughts and consciousness do not need continuous bioelectricity.
Speaking of which, are you curious about the future? Since entering the 2 1 century, our life has undergone earth-shaking changes. Back to 100 years ago, a fever and a cold could kill you. Can you imagine the successful completion of a heart transplant or even a "head change" in medicine at that time? In the next 50- 100 years, the progress of cryonics technology is likely to revive the brain. At that time, we will see how people like Captain America stood before us 100 years ago. .....
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