“…The method of measurement of MAC used in this study has been described previously (Ilkiw et al., 1997, 2002; Imai et al., 2002; Pypendop & Ilkiw, 2005b). Values for the MAC of isoflurane in the cat have ranged from 1.2 ± 0.13% to 2.21 ± 0.17% (Steffey & Howland, 1977; Ilkiw et al., 1997, 2002; March & Muir, 2003; Barter et al., 2004; Yackey et al., 2004; Lamont et al., 2005; Pypendop & Ilkiw, 2005b), so the values determined in this study are within this range.…”