Anaes SAQs · Measurement & monitoring physics

Humidity, heat transfer and perioperative warming

Primary — the three descriptions of humidity (absolute mg/L, relative percentage, dew point); the four heat-transfer mechanisms (radiation about 60 per cent, convection, evaporation, conduction); the latent heat of vaporisation of water about 2.4 MJ/L; the passive HME versus the active heated water-bath humidifier; the redistribution hypothermia of the first hour; the prevention strategies.