Table 2

Table 2
Colour duplex ultrasound (CDU) findings in 9 patients with distal DVT at 3 weeks, and also investigated 6 weeks postoperatively
Patient	3-week CDU	6-week CDU	Prophylaxis	Warfarin	Phlebography

Nr 1	DVT in two soleus veins	Partial regress, only one soleus vein	Placebo	Started at 3 weeks	Negative, no DVT

Nr 2	DVT in one fibular vein	Unchanged from 3 weeks	Dalteparin	No secondary prophylaxis	Initially interpreted as negative, positive at secondary evaluation

Nr 3	DVT in one soleus vein	Progress into gastrocn and fibular veins	Dalteparin	Started at 6 weeks	Positive, performed at 6 weeks

Nr 4	DVT in one soleus vein	Unchanged from 3 weeks	Placebo	No secondary prophylaxis	Initially interpreted as negative, positive at secondary evaluation

Nr 5	DVT in one gastrocn vein	Progress into one more gastrocn vein	Placebo	No secondary prophylaxis	Not performed

Nr 6	DVT in soleus vein	Progress into two fibular veins	Placebo	Started at 6 weeks	Positive, performed at 6 weeks

Nr 7	DVT in two gastrocn veins	Progress into popliteal and calf veins	Placebo	Started at 6 weeks	Not performed

Nr 8	DVT in one soleus vein	Progress into two fibular veins	Dalteparin	Started at 6 weeks	Positive, performed at 6 weeks

Nr 9	DVT in one posterior tibial vein	Progress into two fibular veins	Dalteparin	Started at 6 weeks	Negative at 3 weeks, not performed at 6 weeks

Rosfors et al. Thrombosis Journal 2010 8:4 doi:10.1186/1477-9560-8-4