Source: NDTV

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Context

• Australian Cryonics firm freezes first client in hopes of bringing him back to life in future.

Details

• Cryonics is the practice of preserving individuals at extremely low temperatures with the hope that future medical advancements can restore them to life and health.
• It involves cooling legally dead bodies to liquid nitrogen temperatures to halt physical decay.

Key Concepts and Principles

• Legal Death: Cryonics can only be initiated after a person is declared legally dead, meaning their heart has stopped beating and there is no neurological activity.
• Cryopreservation Process:
• Stabilization:Begins immediately after legal death to maintain tissue viability.
• Cooling:The body is gradually cooled to just above freezing to prevent ice formation.
• Cryoprotectant Perfusion:Blood is replaced with cryoprotectants to prevent ice crystal formation.
• Vitrification:The body is cooled to -196°C in liquid nitrogen, turning biological tissues into a glass-like state without forming ice crystals.

Technical Aspects of Cryonics

• Cryoprotectants: Chemicals like glycerol and ethylene glycol used to protect biological tissues from ice damage during cooling.
• Vitrification: A process that cools the body so quickly that ice crystals do not form, avoiding cell and tissue damage.
• Cooling Rates: Controlled cooling rates are crucial to avoid thermal stress and damage.
• Storage: Long-term storage in liquid nitrogen at -196°C in specially designed cryostats.

Ethical Considerations

• Consent: Individuals must provide informed consent prior to death for cryonic preservation.
• Ethical Debates: Concerns about identity and continuity, the potential for future resuscitation, and resource allocation.

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