1. Suctioning: a review of current research recommendations;Day;Intensive Crit Care Nurs,2002
2. Potential hazards of tracheobronchial suctioning;Fiorentini;Intensive Crit Care Nurs,1992
3. Chapter 1: medical gas supply;Al-Shaikh,2002
4. Ward’s anaesthetic equipment;Davey,2005
5. International Organization for Standardization ISO 10079-1:1999 Medical suction equipment – Part 1: Electrically powered suction equipment – Safety requirements, ISO 10079-2:1999 Medical suction equipment – Part 2: Manually powered suction equipment, ISO 10079-3:1999 Medical suction equipment – Part 3: Suction equipment powered from a vacuum or pressure source. www.iso.org (accessed 20 Feb 2012).