Death
Definition
Permanent and irreversible cessation of the vital functions of the body. Traditionally tested by stoppage of heart, lungs and brain; modern practice anchors it in irreversible loss of brainstem function.
- Classical criteria
- Cessation of heartbeat, breathing, and brain function
- Modern anchor
- Irreversible loss of brainstem function
- Field
- Forensic thanatology and medico-legal death certification
- Reversibility test
- Must be permanent, not merely a temporary cessation
- Legal role
- Triggers organ donation eligibility and death certification
Common questions
Why did medical practice shift from cardiopulmonary criteria to brainstem-based criteria?+
Ventilators and resuscitation techniques can maintain heartbeat and breathing artificially after the brainstem has permanently stopped functioning, so relying only on cardiopulmonary signs could misclassify a patient whose brain function will never return, prompting the shift to a brainstem-based definition.
Do all jurisdictions use the same legal definition of death?+
No, jurisdictions vary in how they codify brain death, some requiring whole-brain criteria and others brainstem-only, and some retaining purely cardiopulmonary criteria for routine cases, which matters for cross-border medico-legal and transplant cases.
Related terms
- Asphyxia
- Mode of death due to interference with respiration and tissue oxygenation. Subtypes are anoxic, anaemic, stagnant and histotoxic.
- Brain Death (Brainstem Death)
- Irreversible cessation of all functions of the brainstem. Recognised in Indian law under the Transplantation of Human Organs and Tissues Act 1994...
- Cause of Death
- The disease or injury directly responsible for death. Recorded by the pathologist on the death certificate, it is distinct from manner of...
- Coma
- Mode of death due to failure of the brain (cerebral function). The patient is unconscious, unresponsive, with depressed or absent reflexes.
- Inquest
- Legal enquiry into the cause and circumstances of a sudden, suspicious or unnatural death. In India conducted by the police under BNSS...
- Manner of Death
- The circumstantial classification of a death using the NAME five-category scheme (natural, accident, suicide, homicide, undetermined), or the jurisdiction-specific equivalent, recorded separately...
- Mechanism of Death
- The physiological derangement through which the cause of death produced the dying process. Examples include exsanguination, asphyxia, sepsis, and cardiac arrhythmia. Multiple...
- Somatic (Clinical) Death
- Cessation of integrated functions of the body as a whole, marked by stoppage of heart, respiration and central nervous system activity. Cellular...
- Syncope
- Mode of death due to sudden failure of cardiac function leading to inadequate cerebral perfusion. Often vasovagal, cardiac arrhythmic, or haemorrhagic in...