1. Effect of caudal block using different volumes of local anaesthetic on optic nerve sheath diameter in children: a prospective, randomized trial 
B. Lee, B.-N. Koo, Y.S. Choi, H.K. Kil, M.-S. Kim, J.H. Lee 
British Journal of Anaesthesia 
Volume 118, Issue 5, Pages (May 2017)
DOI: /bja/aex078
Copyright © 2017 The Author(s) Terms and Conditions

2. Fig 1
Measurement of optic nerve sheath diameter (ONSD) by ultrasonography. Axial images of the orbit were acquired in the plane of the optic nerve. ONSDs were measured 3 mm posterior to the optic nerve head (A–B).
British Journal of Anaesthesia  , DOI: ( /bja/aex078)
Copyright © 2017 The Author(s) Terms and Conditions

3. Fig 2 Flow diagram of the study.
British Journal of Anaesthesia  , DOI: ( /bja/aex078)
Copyright © 2017 The Author(s) Terms and Conditions

4. Fig 3
Changes in optic nerve sheath diameter (ONSD). Values are expressed as mean (sd). *The two groups exhibited significant differences in changes in ONSD according to time in the linear mixed model (corrected for age, body mass index, end-tidal sevoflurane and carbon dioxide levels, and peak inspiratory pressure; PGroup×Time=0.003). T0, before caudal block; T1, immediately after caudal block; T2, 10 min after caudal block; T3, 30 min after caudal block.
British Journal of Anaesthesia  , DOI: ( /bja/aex078)
Copyright © 2017 The Author(s) Terms and Conditions