Abstract :
Cryonics, a derivative of
nanotechnology is the speculative practice of using cold to preserve the life
of person who can no longer be supported by ordinary medicine. Using cryonics
seriously ill patients are frozen until they could be treated. For preservation
freezing and reanimating of tissues or entire organisms is done. The increasing
number of cryonic patients i.e. the patients who are frozen to death with a
hope of life extension itself shows the importance of cryonics.
WHAT IS CRYONICS?
Cryonics is the process of using ultra
cold temperature (using liquid Nitrogen; -196° C) to preserve a person who has
been declared legally dead, in the hope that future medical technology can
repair and revive the person. CRYO means ‘cold’. Cryonics is often considered as
a subject of science fiction. Cryonics is assumed to be good enough to bring
back to life people who have been frozen solid in liquid nitrogen for
centuries!
HOWIS CRYONICS PERFORMED?
If a person has to be preserved using cryonics the heart of the
person should stop beating and the person should be pronounced “legally dead”.
The team of cryonicists stabilizes the body, supplying the brain with enough
oxygen and blood to preserve minimal function until it can be transported to the suspension facility.
Then body is packed in ice and injected with heparin (an anticoagulant) to
prevent blood from clotting.
After this the actual freezing begins.
The patients can’t be simply put into a vat of liquid nitrogen, because the
water inside their cells would freeze. When water freezes, it expands, this
would cause the cells to simply shatter. So we have to remove water from the
cells and replace it with a glycerol based chemical mixture called a
Cryoprotectant – a sort of human antifreeze.
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