“…In spite of the importance of the environmental context of the PICU in the promotion of comfort, the two tools available to determine comfort levels mentioned previously assess only physical and psychological aspects. As a result, it is important to realise that environmental noise, the strong light which may disrupt patients circadian rhythm, and the high ambient temperature are the aspects that most influence comfort in paediatric critical care patients (Achury & Achury, 2010;Achury, Delgado, & Ruiz, 2013;B arcenas, 2013;Basco, Fariñas, & Hidalgo, 2010;Berglund, Lindvall, & Schwela, 1999;Da Silva et al, 2012;G omez, 2013;Guill en et al, 2013;Krinsky, Murillo, & Johnson, 2014;Lawson et al, 2010;Novaes, Aronovich, Ferraz, & Knobel, 1997;Okcu et al, 2011;Salas & Gamaldo, 2008;Wagner, Byrne, & Kolcaba, 2006;Wilson & Kolcaba, 2004). It has been demonstrated that the capacity of children (above all, at early ages) to regulate and control their own behaviour is directly related to their environment.…”