1. Clinical alert: failure in face mask seal as a consequence of incorrect face mask assembly 
S.F. McDouall, R.C. Campbell, R.C. Tasker 
British Journal of Anaesthesia 
Volume 91, Issue 6, Pages (December 2003)
DOI: /bja/aeg647
Copyright © 2003 British Journal of Anaesthesia Terms and Conditions

2. Fig 1
(a) Two-piece Laerdal mask showing the component parts side-on. (b) Assembled mask showing the absence of a rubber flange (see arrow), which was responsible for equipment failure in Case 1. (c) Correctly assembled mask en face. (d) Incorrectly assembled mask on too small a face-piece. The arrows indicate the gap responsible for equipment failure in Case 2.
British Journal of Anaesthesia  , DOI: ( /bja/aeg647)
Copyright © 2003 British Journal of Anaesthesia Terms and Conditions