“…Despite evidence that adherence to ERAS protocols improves patient outcomes (ERAS Compliance Group, 2015, Gustafsson et al, 2011, this patient group remains at high risk of early postoperative clinical deterioration (Seneviratne, Crosbie, Jackson-Jeurgens, & Clough, 2014). Adult patients undergoing major orthopaedic procedures are typically older with underlying cardiovascular, renal and respiratory conditions placing them at high risk of experiencing perioperative cardiac events (Chong et al, 2011), delirium (Staus, 2011) and respiratory tract infections (Roche, Wenn, Sahota, & Moran, 2005 (Casamento, Dunlop, Jones, & Duke, 2008;Guinane, Bucknall, Currey, & Jones, 2013;Helling, Martin, Martin, & Mitchell, 2014;Jones et al, 2012;Mitchell et al, 2010;Odell, Victor, & Oliver, 2009).…”