Modified Maastricht classification of donations after circulatory death
| Category | Clinical status |
|---|---|
| I (uncontrolled) | Found dead: sudden unexpected cardiac arrest without any attempt of resuscitation by a life-medical team |
| IA: out of hospital | |
| IB: in hospital | |
| II (uncontrolled) | Witnessed cardiac arrest: sudden unexpected irreversible cardiac arrest with unsuccessful resuscitation |
| IIA: out of hospital | |
| IIB: in hospital | |
| III (controlled) | Planned withdrawal of life-sustaining therapy |
| IV (UC or C) | Sudden cardiac arrest after diagnosis of brain death |
| V | Medically assisted cardiac arrest and subsequent organ donation in some country |
UC, uncontrolled; C, controlled.