1. Spinal anaesthesia for ambulatory arthroscopic surgery of the knee: a comparison of low-dose prilocaine and fentanyl with bupivacaine and fentanyl 
A.S. Black, G.N. Newcombe, J.L. Plummer, D.H. McLeod, D.K. Martin 
British Journal of Anaesthesia 
Volume 106, Issue 2, Pages (February 2011)
DOI: /bja/aeq272
Copyright © 2011 The Author(s) Terms and Conditions

2. Fig 1
Times in minutes for regression of sensory block to dermatome level L4. Regression to L4 occurred more rapidly in Group P than in Group B. Proportion not yet regressed to L4 refers to the proportion of subjects in each group in whom sensory block level had not yet regressed to dermatome level L4.
British Journal of Anaesthesia  , DOI: ( /bja/aeq272)
Copyright © 2011 The Author(s) Terms and Conditions