“…Favourable physicochemical properties (Lerman et al 1984;Lerman et al 1986) (Table 1) might lead us to anticipate that these anaesthetics would facilitate a more rapid induction of anaesthesia than would halothane. However, the irritant effects of isoflurane, enflurane and desflurane on the upper airway and their depressant effects on the respiratory system more than offset the favourable physicochemical properties (Fisher et al 1985;Pandit, Steude & Leach 1985;McAteer et al 1986;Phillips, Brimacornbe & Simpson 1988;Taylor & Lerman 1992;Zwass et al 1992). The irritant effects of isoflurane and desflurane on the upper airway are manifested in greater incidences of breathholding, coughing, salivation, excitement, laryngospasm and arterial oxygen desaturation when compared with halothane.…”