Diagnosis
Figure 6. Whole-Leg US for First LE DVT Whole-leg US
– + Proximal DVT
Isolated distal DVT
No DVT Treat OR
Figure 7. Suspected Recurrent DVT: Nondiagnostic Proximal CUS
No prior US results
Highly sensitive D-dimer
No DVT –
+ OR Venography
Treat +
Prior US results Venography
Treat +
a b – No DVT OR
Repeat Proximal CUS in 1 week
Treat +a
OR
"+" refers to a new noncompressible segment or an area of prior noncompressibility with an interval increase in residual diameter of ≥ 4 mm.
10
"–" refers to a normal US or an area of prior noncompressibility with a stable or decreased residual diameter or an interval increase in residual diameter of < 2 mm.
–b No DVT OR
sensitive D-dimer –
High/Mod + No DVT – No DVT Serial US
