Table 1. Expert consensus on classifications of hypothermia in circulatory arrest during aortic arch surgery.

Category	Nasopharyngeal temperature
Profound hypothermia	≤14 °C
Deep hypothermia	14.1-20 °C
Moderate hypothermia	20.1-28 °C
Mild hypothermia	28.1-34 °C

Reproduced with permission from Yan et al. (10)