Table 1. VExUS grading and descriptors.
Grade IV IVC, >2 cm and <50% collapsibility. Hepatic vein flow abnormalities, mild: S<D wave; severe: flattened, inverted or biphasic S wave. Portal vein flow abnormalities, mild: pulsatility index 0.3-.49; severe: 0.5-1.0. Pulsatility index can be calculated as, (Vmax - Vmin)/Vmax, where Vmax is maximum velocity and Vmin is minimum velocity.
VExUS, venous excess ultrasound score; IVC, inferior vena cava
| VExUS grade | Description |
| 1 | Grade IV IVC, no hepatic vein/portal vein abnormality |
| 2 | Grade IV IVC, mild hepatic vein/portal vein abnormality |
| 3 | Grade IV IVC, severe hepatic vein/portal vein abnormality |