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World J Crit Care Med. Jun 9, 2026; 15(2): 114264
Published online Jun 9, 2026. doi: 10.5492/wjccm.v15.i2.114264
Table 1 Correlation of inferior vena cava diameter and caval/distensibility indices with right atrial pressure, fluid responsiveness and fluid intolerance
IVC diameter (cm)
IVC inspiratory collapsibility or distensibility (%)
Right atrial pressure (mmHg)
Fluid responsiveness (to correlate with other features)
Fluid intolerance (to correlate with other features)
> 2.1Collapsibility < 5010-20NoPossible
Distensibility < 18
> 2.1Collapsibility > 505-10Possible (judicious fluid);Possible
Distensibility > 18
≤ 2.1Collapsibility < 505-10Possible (judicious fluid)Possible
Distensibility < 18
≤ 2.1Collapsibility > 500-5YesUnlikely
Distensibility > 18


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