1. Comparison of alfentanil, fentanyl and sufentanil for total intravenous anaesthesia with propofol in patients undergoing coronary artery bypass surgery† 
J. Ahonen, K.T. Olkkola, M. Hynynen, T. Seppälä, H. Ikävalko, B. Remmerie, M. Salmenperä 
British Journal of Anaesthesia 
Volume 85, Issue 4, Pages (October 2000)
DOI: /bja/
Copyright © 2000 British Journal of Anaesthesia Terms and Conditions

2. Fig 1
Plasma concentrations of alfentanil (a), fentanyl (b) and sufentanil (c) during anaesthesia for coronary artery bypass surgery (n=20, all groups). Sufentanil determinations were restricted because of limited resources for analysis.
British Journal of Anaesthesia  , DOI: ( /bja/ )
Copyright © 2000 British Journal of Anaesthesia Terms and Conditions

3. Fig 2
Plasma concentrations of alfentanil (a), fentanyl (b) and sufentanil (c) during and after coronary artery bypass surgery (n=20, all groups). Infusion=average duration of the anaesthetic.
British Journal of Anaesthesia  , DOI: ( /bja/ )
Copyright © 2000 British Journal of Anaesthesia Terms and Conditions

4. Fig 3
Time to awakening (open circles) and tracheal extubation (filled circles) after alfentanil, sufentanil or fentanyl together with propofol (n=20, all groups).
British Journal of Anaesthesia  , DOI: ( /bja/ )
Copyright © 2000 British Journal of Anaesthesia Terms and Conditions

5. Fig 4
Plasma concentrations of propofol in patients receiving alfentanil (a), fentanyl (b) and sufentanil (c) during and after coronary artery bypass surgery (n=20, all groups). Infusion=average duration of anaesthesia.
British Journal of Anaesthesia  , DOI: ( /bja/ )
Copyright © 2000 British Journal of Anaesthesia Terms and Conditions