31-03-2011, 11:52 AM
Presented By
S.prithvi,
Sai amraj,
CRYONICS
Cryonics is a technique designed to save lives and greatly extend lifespan. It involves cooling legally-dead people to liquid nitrogen temperature where physical decay essentially stops, in the hope that future technologically advanced scientific procedures will someday be able to revive them and restore them to youth and good health. A person held in such a state is said to be a "Cryonics does not involve the freezing of dead people. Cryonics involves placing critically ill patients that cannot be treated with contemporary medical technologies in a state of long-term low temperature care to preserve the person until a time when treatments might be available. Similar to such common medical practices as general anesthesia and hypothermic circulatory arrest, cryonics does not require a fundamental paradigm shift in how conventional medicine thinks about biology, physiology, and brain function. Although current cryopreservation methods are not reversible, under ideal circumstances the fine structure that encodes a person’s personality is likely to be preserved. Complete proof of reversible vitrification of human beings would be sufficient, but is not necessary, for acceptance of cryonics as a form of long-term critical care medicine. The current alternative is death; or for persons who are at risk of suffering extensive brain injury, loss of personhood.
For very old and fragile patients, meaningful resuscitation would require reversal of the aging process. Obviously, the objective of cryonics is not to resuscitate patients in a debilitated and compromised condition, but to rejuvenate the patient. Ongoing research in fields such as biogerontology, nanomedicine, and synthetic biology inspire optimism that such treatment will be available in the future. who are at risk of suffering extensive brain injury, loss of personhood.
Many biological specimens have been cryopreserved, stored at liquid nitrogen temperature where all decay ceases, and revived; these include whole insects, many types of human tissue including brain tissue, human embryos which have later grown into healthy children, and a few small mammalian organs. Increasingly more cells, organs and tissues are being reversibly cryopreserved.
The repair capabilities of molecular biology and nanotechnology increasingly point to a future technology that can repair damage due to aging, disease and freezing.
Dogs and monkeys have had their blood replaced with protective solution and cooled to below 0ºC, with subsequent rewarming and revival. Nematode worms have been cryopreserved in liquid nitrogen (-196ºC), and subsequently revived. The procedure involves initial cool-down with use of anticoagulant, removing the blood, and replacing it with a cryoprotectant — a solution that minimizes or eliminates freezing damage. This is followed by further cooling, and then long-term immersion in liquid nitrogen at a temperature of −196ºC. A whole mammal has not yet been cryopreserved to cryogenic temperatures and revived, the progress of science is moving in that direction.
S.prithvi,
Sai amraj,
CRYONICS
Cryonics is a technique designed to save lives and greatly extend lifespan. It involves cooling legally-dead people to liquid nitrogen temperature where physical decay essentially stops, in the hope that future technologically advanced scientific procedures will someday be able to revive them and restore them to youth and good health. A person held in such a state is said to be a "Cryonics does not involve the freezing of dead people. Cryonics involves placing critically ill patients that cannot be treated with contemporary medical technologies in a state of long-term low temperature care to preserve the person until a time when treatments might be available. Similar to such common medical practices as general anesthesia and hypothermic circulatory arrest, cryonics does not require a fundamental paradigm shift in how conventional medicine thinks about biology, physiology, and brain function. Although current cryopreservation methods are not reversible, under ideal circumstances the fine structure that encodes a person’s personality is likely to be preserved. Complete proof of reversible vitrification of human beings would be sufficient, but is not necessary, for acceptance of cryonics as a form of long-term critical care medicine. The current alternative is death; or for persons who are at risk of suffering extensive brain injury, loss of personhood.
For very old and fragile patients, meaningful resuscitation would require reversal of the aging process. Obviously, the objective of cryonics is not to resuscitate patients in a debilitated and compromised condition, but to rejuvenate the patient. Ongoing research in fields such as biogerontology, nanomedicine, and synthetic biology inspire optimism that such treatment will be available in the future. who are at risk of suffering extensive brain injury, loss of personhood.
Many biological specimens have been cryopreserved, stored at liquid nitrogen temperature where all decay ceases, and revived; these include whole insects, many types of human tissue including brain tissue, human embryos which have later grown into healthy children, and a few small mammalian organs. Increasingly more cells, organs and tissues are being reversibly cryopreserved.
The repair capabilities of molecular biology and nanotechnology increasingly point to a future technology that can repair damage due to aging, disease and freezing.
Dogs and monkeys have had their blood replaced with protective solution and cooled to below 0ºC, with subsequent rewarming and revival. Nematode worms have been cryopreserved in liquid nitrogen (-196ºC), and subsequently revived. The procedure involves initial cool-down with use of anticoagulant, removing the blood, and replacing it with a cryoprotectant — a solution that minimizes or eliminates freezing damage. This is followed by further cooling, and then long-term immersion in liquid nitrogen at a temperature of −196ºC. A whole mammal has not yet been cryopreserved to cryogenic temperatures and revived, the progress of science is moving in that direction.
