1. Reduction in mouth opening with semi-rigid cervical collars†
C.M. Goutcher, V Lochhead 
British Journal of Anaesthesia 
Volume 95, Issue 3, Pages (September 2005)
DOI: /bja/aei190
Copyright © 2005 British Journal of Anaesthesia Terms and Conditions

2. Fig 1
Types of semi-rigid collar used (left to right): Stifneck (Laerdal Medical Corp.); Miami J (Jerome Medical); Philadelphia (Philadelphia Cervical Collar Company).
British Journal of Anaesthesia  , DOI: ( /bja/aei190)
Copyright © 2005 British Journal of Anaesthesia Terms and Conditions

3. Fig 2
Collar sizes.
British Journal of Anaesthesia  , DOI: ( /bja/aei190)
Copyright © 2005 British Journal of Anaesthesia Terms and Conditions

4. Fig 3
Variation in mouth opening after application of a Stifneck collar (P<0.0001).
British Journal of Anaesthesia  , DOI: ( /bja/aei190)
Copyright © 2005 British Journal of Anaesthesia Terms and Conditions

5. Fig 4
Variation in mouth opening after application of a Miami J collar (P<0.0001).
British Journal of Anaesthesia  , DOI: ( /bja/aei190)
Copyright © 2005 British Journal of Anaesthesia Terms and Conditions

6. Fig 5
Variation in mouth opening after application of a Philadelphia collar (P<0.0001).
British Journal of Anaesthesia  , DOI: ( /bja/aei190)
Copyright © 2005 British Journal of Anaesthesia Terms and Conditions