Table 2 Colour duplex ultrasound (CDU) findings in 9 patients with distal DVT at 3 weeks, and also investigated 6 weeks postoperatively
From: A follow-up study of the fate of small asymptomatic deep venous thromboses
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 |