1. Epidural catheter placement in children: comparing a novel approach using ultrasound guidance and a standard loss-of-resistance technique 
Willschke H , Marhofer P , Bösenberg A , Johnston S , Wanzel O , Sitzwohl C , Kettner S , Kapral S  
British Journal of Anaesthesia 
Volume 97, Issue 2, Pages (August 2006)
DOI: /bja/ael121
Copyright © 2006 British Journal of Anaesthesia Terms and Conditions

2. Fig 1
Epidural insertion was performed using a midline approach and a paramedian longitudinal position of the ultrasound probe.
British Journal of Anaesthesia  , DOI: ( /bja/ael121)
Copyright © 2006 British Journal of Anaesthesia Terms and Conditions

3. Fig 2
Measuring points for skin–epidural distance and diameter of epidural space in a longitudinal transversal paramedian ultrasonographic view. The lower grey arrow indicates the dura.
British Journal of Anaesthesia  , DOI: ( /bja/ael121)
Copyright © 2006 British Journal of Anaesthesia Terms and Conditions

4. Fig 3
Longitudinal transversal ultrasonographic view of neuraxial anatomy in a child weighing 4 kg. The epidural space is wider cranially (left) than caudally (right), because of the expansive force of local anaesthetic infused through the epidural catheter.
British Journal of Anaesthesia  , DOI: ( /bja/ael121)
Copyright © 2006 British Journal of Anaesthesia Terms and Conditions

5. Fig 4
Correlation between body weight (kg) and depth of epidural space as measured with a linear 5–10 MHz hockey-stick probe from a paramedian longitudinal view in children under 6 months (Pearson correlation coefficient: 0.9).
British Journal of Anaesthesia  , DOI: ( /bja/ael121)
Copyright © 2006 British Journal of Anaesthesia Terms and Conditions