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Monday, November 09, 2009

CRYONIC: NEW FACE OF MUMMIFICATION






The main topic for technicians and scientists dedicated in body and soul to cryonics (preservation of legally dead humans to low temperature), is the immortality, what is not a little thing. Although important steps have been taken in this item, they lack to overcome techno-economic aspects. I) The process requires the total extraction of blood, stuffing blood vessels with antifreezes, avoiding the entrance of air to avoid ischemic periods that would damage irreversibly to the brain, being achieved a state of suspended animation, with bodies stored in deposits full with liquid nitrogen at -200C, preserving bodies so fresh as it is possible until being able to be revived. Some cryonicists plans to preserve isolated heads (to be implanted in other bodies) and, other total bodies.

II) With current cooling system, are well preserved kidney and heart. The liver exhibits a total loss of its structure. The damage to the brain is intermediate among liver, heart and kidneys. At a more intimate level there is damage in cell ultraestructure due to slip of tissues on other, during the cooling producing tissue cracking in skin, bone, muscles, brain, those that contract as they are cooled in liquid nitrogen. A solution to this serious problem will be the use of cooling with vapor at low temperatures minimizing thermal streses, allowing liquid nitrogen to cool the system passively, a little but late.

III) Another alternative is vitrificatión at 135øC. A method that preserves better the brain than other organs. Being possible to use the vitrification before legal death, it is ideal to be applied to people with multiple sclerosis, Alzheimer’s disease, chorea of Huntington. While the entirety of the extracellular liquid stays frozen, the cells survive because its inside is vitrified.
IV) Another problem are the cryoprotectors being looked for others that penetrate better to the interior of the brain. V) An additional problem is the ischemia that damages the brain if it lasts but of 30 minutes. The main damage within the first hour is due to clotting and vessel injury. It takes many hours for all cells to die at room temperature, including those in the brain.

VI) Contrarily to religious cosmovisions that believe in the immortality of the soul, cryonicists sustains that the only thing that counts is the information contained in the structure of all alive being. Some argue that immortals will overpopulate the planet, being able to become in parasites. Finally, what if a revived wants to marry? to inherit? what if he appeals to euthanasia?. The cryonic try to preserve and to protect the life, not to revert the death.

CRIONICA: LA NUEVA CARA DE LA MOMIFICACION

El tema de fondo para tenicos y cientificos dedicados a la criogenesis es la inmortalidad del alma, lo cual no es poca cosa. Aunque se han dado pasos importantes en este rubro, faltan remontar aspectos técnico-económicos. I) El proceso requiere la extracción total de la sangre, rellenando vasos sanguineos con anticongelantes, impidiendo la entrada de aire para evitar periodos isquemicos, que dañarían irreversiblemente al cerebro, lográndose un estado de animacion suspendida, con cuerpos almacenados en depositos llenos de nitrogeno liquido a -200C, preservando cuerpos tan frescos como sea posible hasta poder ser revividos. Algunos criogenistas planean preservar cabezas aisladas (a ser implantadas en otros cuerpos) y, otros cuerpos totales.

II) Con el sistema de enfriamiento actual, se preservan bien riñon y corazón. El hígado exhibe una perdida total de su estructura. El daño al cerebro es intermedio entre hígado, corazón y riñones. A nivel mas intimo hay daño en la ultraestructura celular por el deslizamiento de tejidos sobre otros, durante el enfriamiento gestando grietas tisulares en piel, hueso, musculos, tejido cerebral, los que se contraen a medida que son enfriados en Nitrogeno liquido. Una solución a este problema seria el enfriamiento con vapor manteniendo temperaturas bajas minimizando los estreses térmicos, permitiendo al nitrógeno liquido enfriar pasivamente el sistema, un poco mas tarde.

III) Otra alternativa es la vitrificación (conversión en vidrio) a 135øC. Un método que preserva mejor al cerebro que a los otros órganos. Siendo posible emplear la vitrificacion antes de la muerte legal, es ideal para ser aplicada a personas afectas de esclerosis multiple, enfermedad de Alzheimer, corea de Huntington. Mientras la totalidad del liquido extracelular se mantiene helado, las celulas sobreviven porque su interior se vitrifica.

IV)
El otro problema lo constituyen los crioprotectores buscándose otros que penetren mejor al interior del cerebro. V) Un problema adicional es la isquemia, que daña al cerebro si dura mas de 30 minutos.

VI) Contrariamente a las cosmovisiones religiosas que creen en la inmortalidad del alma, los criogenistas sostienen que lo único que cuenta es la información contenida en la estructura de todo ser vivo. Algunos arguyen que los inmortales por venir sobrepoblaran al planeta, pudiendo devenir en parasitos. Finalmente, ¿ podria un revivido casarse? ¿heredar? ¿que si recurre a la eutanasia?. La crionica intenta preservar y proteger la vida, no revertir la muerte.

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