1. International normalized ratio and prothrombin time values before the removal of a lumbar plexus catheter in patients receiving warfarin after total hip replacement† 
J.E. Chelly, D.M. Szczodry, K.J. Neumann 
British Journal of Anaesthesia 
Volume 101, Issue 2, Pages (August 2008)
DOI: /bja/aen132
Copyright © 2008 British Journal of Anaesthesia Terms and Conditions

2. Fig 1
Distribution of INR and PT values on the day of surgery (preop), the first postoperative day 1(postop day 1), and the day of the removal of the lumbar plexus catheter (lumbar plexus cath. d/c). Median values are given under each graph. There are significant differences between postop day 1 vs preop group and lumbar plexus cath. d/c vs preop group (*P<0.05) and between lumbar plexus cath. d/c group vs postop day 1 (†P<0.05).
British Journal of Anaesthesia  , DOI: ( /bja/aen132)
Copyright © 2008 British Journal of Anaesthesia Terms and Conditions

3. Fig 2
INR values at the time of the lumbar plexus catheter removal in patients receiving warfarin for thromboprophylaxis after total hip replacement. Data are presented according to the thromboprophylaxis guidelines: –1.4 (normal); 1.5–1.9 (sub-therapeutic); 2.0–3.0 (therapeutic), and 3.1–3.9 (over the therapeutic range).
British Journal of Anaesthesia  , DOI: ( /bja/aen132)
Copyright © 2008 British Journal of Anaesthesia Terms and Conditions