Table 1.

Modified Maastricht classification of donation after circulatory death

Category	Circumstances	Definition
I. Uncontrolled	Found dead IA. Out of hospital IB. In hospital	Sudden unexpected circulatory arrest without any attempt of resuscitation by a medical team
II. Uncontrolled	Witnessed cardiac arrest IIA. Out of hospital IIB. In hospital	Sudden unexpected irreversible circulatory arrest with unsuccessful resuscitation by a medical team
III. Controlled	Withdrawal of life-sustaining therapy	Planned WLST; expected circulatory arrest
IV. Uncontrolled/controlled	Circulatory arrest after neurological determination of death.	Sudden circulatory arrest after neurological determination of death diagnosis during donor management but before planed organ recovery

WLST, Withdrawal of life-sustaining therapy.