“…A number of adjunctive techniques and devices have been used to assist those who are unable, for whatever reason, to clear pulmonary secretions effectively and have been extensively reviewed (Cystic Fibrosis Trust, 2003;Yankaskas et al 2004;Kendrick, 2007;van der Schans, 2007;Bott et al, 2009;Flume et al, 2009;Daniels, 2010).…”