Caval Index (rev. 1/31/21)
INDICATIONS: Caval index aids clinicians in determining fluid responsiveness in spontaneously breathing patients with acute circulatory failure
Subcostal long axis view, identify IVC
Using M-mode imaging, 2 to 3 centimeters from the right atrium, measure maximum and minimum IVC diameters over a single respiratory cycle.
Caval Index = (Max - Min) / Max *100