1. Ultrasonographic assessment of topographic anatomy in volunteers suggests a modification of the infraclavicular vertical brachial plexus block† 
M. Greher, G. Retzl, P. Niel, L. Kamolz, P. Marhofer, S. Kapral 
British Journal of Anaesthesia 
Volume 88, Issue 5, Pages (May 2002)
DOI: /bja/
Copyright © 2002 British Journal of Anaesthesia Terms and Conditions

2. Fig 1
Infraclavicular vertical brachial plexus block (IVBPB). Schematic view based on a real magnetic resonance imaging scan. Landmarks (1=jugular fossa, 2=ventral process of the acromion), the puncture site according to the IVBPB technique (P) and the optimal puncture site are verified by sonography (S).
British Journal of Anaesthesia  , DOI: ( /bja/ )
Copyright © 2002 British Journal of Anaesthesia Terms and Conditions

3. Fig 2
Typical sonographic image of the infraclavicular region (cross-section). Note the proximity to the pleural cavity (arrows). SA=subclavian artery; SV=subclavian vein; CV=cephalic vein; circles=cords of the brachial plexus.
British Journal of Anaesthesia  , DOI: ( /bja/ )
Copyright © 2002 British Journal of Anaesthesia Terms and Conditions

4. Fig 3
Histogram of deviation d in female and male volunteers (L indicates lateral, M indicates medial, numbers indicate distance in intervals of 5 mm).
British Journal of Anaesthesia  , DOI: ( /bja/ )
Copyright © 2002 British Journal of Anaesthesia Terms and Conditions

5. Fig 4
Box-and-whisker plot of deviation d, separately for men and women. The circle indicates P<0.001 (d vs 0; one-sample t-test).
British Journal of Anaesthesia  , DOI: ( /bja/ )
Copyright © 2002 British Journal of Anaesthesia Terms and Conditions

6. Fig 5
Bland and Altman plot for the two methods of determining the optimal puncture site. The solid line indicates the mean value of d and the dashed lines indicate the standard deviation.
British Journal of Anaesthesia  , DOI: ( /bja/ )
Copyright © 2002 British Journal of Anaesthesia Terms and Conditions