Results that “rule-in” or “rule-out” leg DVT
| Results . |
|---|
| Rules-in a first leg DVT |
| Venous ultrasound |
| Noncompressibility of proximal veins (calf vein trifurcation included) |
| Noncompressibility of distal veins, when findings are extensive |
| Intraluminal defect (unequivocal) with associated absence of flow in the iliac veins or inferior vena cava, when compressibility cannot be assessed |
| Venography |
| Intraluminal filling defect in proximal or distal deep veins |
| Rules-out a first leg DVT |
| D-dimer |
| Negative very sensitive test (eg, D-dimer <500 μg/L) AND low or moderate CPTP |
| Negative moderately sensitive test (including D-dimer <1000 μg/L) AND low CPTP |
| Venous ultrasound |
| Fully compressible proximal veins AND low CPTP |
| Fully compressible proximal veins AND moderately or very sensitive D-dimer test |
| Fully compressible proximal and distal veins (whole-leg US) |
| Fully compressible proximal veins AND normal repeat proximal US after 7 d |
| Venography |
| All deep veins seen and no intraluminal filling defects |
| Rules-in a recurrent leg DVT |
| Venous ultrasound |
| A new, noncompressible proximal vein segment |
| A 4-mm increase in diameter of the common femoral or popliteal vein compared with a previous test |
| A unequivocal extension of thrombosis (eg, additional 10 cm) within the femoral vein |
| Venography |
| Intraluminal filling defect in proximal or distal deep veins (new, or >3 mo after last event) |
| Rules-out a recurrent leg DVT |
| All criteria that rule-out a first DVT |
| Venous ultrasound |
| ≤1 mm increase in diameter of the common femoral, and femoral and popliteal veins compared with a previous test AND remains unchanged on repeat testing after 2 d and 7 d |
| Results . |
|---|
| Rules-in a first leg DVT |
| Venous ultrasound |
| Noncompressibility of proximal veins (calf vein trifurcation included) |
| Noncompressibility of distal veins, when findings are extensive |
| Intraluminal defect (unequivocal) with associated absence of flow in the iliac veins or inferior vena cava, when compressibility cannot be assessed |
| Venography |
| Intraluminal filling defect in proximal or distal deep veins |
| Rules-out a first leg DVT |
| D-dimer |
| Negative very sensitive test (eg, D-dimer <500 μg/L) AND low or moderate CPTP |
| Negative moderately sensitive test (including D-dimer <1000 μg/L) AND low CPTP |
| Venous ultrasound |
| Fully compressible proximal veins AND low CPTP |
| Fully compressible proximal veins AND moderately or very sensitive D-dimer test |
| Fully compressible proximal and distal veins (whole-leg US) |
| Fully compressible proximal veins AND normal repeat proximal US after 7 d |
| Venography |
| All deep veins seen and no intraluminal filling defects |
| Rules-in a recurrent leg DVT |
| Venous ultrasound |
| A new, noncompressible proximal vein segment |
| A 4-mm increase in diameter of the common femoral or popliteal vein compared with a previous test |
| A unequivocal extension of thrombosis (eg, additional 10 cm) within the femoral vein |
| Venography |
| Intraluminal filling defect in proximal or distal deep veins (new, or >3 mo after last event) |
| Rules-out a recurrent leg DVT |
| All criteria that rule-out a first DVT |
| Venous ultrasound |
| ≤1 mm increase in diameter of the common femoral, and femoral and popliteal veins compared with a previous test AND remains unchanged on repeat testing after 2 d and 7 d |