Comparative Analysis of the Collapsibility Index and Distensibility Index of the Inferior Vena Cava Through Echocardiography with Pulse Pressure Variation That Predicts Fluid Responsiveness in Surgical Patients: An Observational Controlled Trial

Comparison of vena cava distensibility index and pulse pressure variation for the evaluation of intravascular volume in critically ill children

“… 23 , 24 A small number of adult studies evaluated the effectiveness of dIVC and PPV for assessing intravascular volume. 25 , 26 , 27 In the present study, initially, there was a strong negative correlation between CVP and PPV, similar to the results for dIVC. Although the hypovolemic group included 21 people based on CVP values, the authors classified 15 people as hypovolemic according to their PPV values and found a strong correlation between CVP and PPV.…”

Assessment of Volume Status and Fluid Responsiveness in Small Animals

“…The IVC CI has shown promise in human medicine to predict fluid responsiveness (127). A "fat" IVC, subjectively defined as wide IVC with an IVC CI < 50% is associated with a high CVP secondary to hypervolemia, congestive heart disease or cardiac tamponade.…”

Response to: A randomized-controlled trial comparing 20% albumin to plasmalyte in patients with cirrhosis and sepsis-induced hypotension [ALPS trial]

“…Furthermore and as authors themselves stress, a limit of this study is the lack of two important ultrasonographic indices as the IVC-collapsibility index (in spontaneously breathing patients) and the IVC-distensibility index (in MV) 6 .…”

“…"Hemodynamic optimization" is mandatory in any critical setting, and thoracic ultrasound, should be a key component of POCUS in CICs, as it can improve bedside diagnosis of pulmonary disease and evaluation of the hemodynamic status 5,6,7 .…”