When does a human being die?

Area of Science:

• Medical Ethics
• Philosophy of Medicine
• Human Biology

Background:

• Historically, precise death determination was unnecessary; modern medicine necessitates clearer definitions.
• Existing definitions of death (cardiopulmonary, whole brain, brainstem, higher brain) present counter-intuitive scenarios.
• Intuition serves as a common benchmark for understanding life and death.

Purpose of the Study:

• To critically examine current definitions of death.
• To propose a more robust, universally applicable definition of death.
• To differentiate the metaphysical definition of death from clinical practices like organ transplantation.

Main Methods:

• Analysis of existing definitions of death, including cardiopulmonary, whole brain, brainstem, and higher brain death.
• Development of a new model for defining death based on the cessation of homeostatic processes.
• Application of philosophical concepts (Olsen's Animalism) and biological markers (human DNA) to define a human being.

Main Results:

• Common definitions of death yield counter-intuitive results when tested against intuitive understanding.
• A proposed definition of death as the irreversible cessation of homeostatic processes provides a singular event in time.
• This model, grounded in human DNA and philosophical concepts, maintains personal identity throughout life.

Conclusions:

• The proposed definition of death as the cessation of homeostasis offers a more robust framework.
• This definition is applicable across the entire human lifespan, preserving personal identity.
• The timing of organ retrieval for transplantation should be distinguished from the metaphysical definition of death.