1. Non-invasive haemoglobin measurement in patients undergoing elective Caesarean section 
A. Butwick, G. Hilton, B. Carvalho 
British Journal of Anaesthesia 
Volume 108, Issue 2, Pages (February 2012)
DOI: /bja/aer373
Copyright © 2012 The Author(s) Terms and Conditions

2. Fig 1 Flow diagram of the study protocol.
British Journal of Anaesthesia  , DOI: ( /bja/aer373)
Copyright © 2012 The Author(s) Terms and Conditions

3. Fig 2
(a) Bland and Altman comparison of Masimo Radical-7 Pulse CO-Oximeter with SpHb™ (SpHb) and venous Hb measured by laboratory CO-Oximetry (a) at baseline, (b) in the immediate postoperative period after CS, and (c) at 24 h post-CS. The horizontal dashed lines correspond to the bias and limits of agreement.
British Journal of Anaesthesia  , DOI: ( /bja/aer373)
Copyright © 2012 The Author(s) Terms and Conditions

4. Fig 3
Mean (sd) Masimo Radical-7 Pulse CO-Oximeter SpHb™ values at 10 pre-defined study time points: 1, baseline; 2, immediately before anaesthesia; 3, neuraxial block height confirmation; 4, uterine incision; 5, adequate uterine tone; 6, within 10 min of arrival in recovery; 7, 1 h after completion of surgery; 8, 4 h after completion of surgery; 9, 24 h after completion of surgery; 10, 48 h after completion of surgery.
British Journal of Anaesthesia  , DOI: ( /bja/aer373)
Copyright © 2012 The Author(s) Terms and Conditions