Normative Data for IVC Diameter and its Correlation with the Somatic Parameters in Healthy Indian Children

To determine the normative data for inferior vena cava (IVC) diameter in children and its correlation with various somatic parameters like height, weight and body surface area in Indian children. Readily available baseline data of IVC diameter in normal children shall be of great help in rapid assessment of variations in sick children.

Total 475 healthy children aged one month to 12 y visiting out patient clinics (OPD's) were enrolled in this study. Weight, height and body surface area were calculated at the time of examination. The maximum and minimum diameters of IVC were measured during the expiratory and inspiratory phase of the respiratory cycle respectively using M mode ultrasonography. Collapsibility Index was also calculated for each subject by measuring difference between the maximum (expiratory) and minimum (inspiratory) IVC diameters divided by the maximum diameter.

The mean age of study subjects was 4.72 ± 3.72 y. Out of 475 subjects, 285 (60%) were boys and 190 (40%) were girls. Mean weight for age (%) of subjects was 89.18 ± 13.26%. Correlation was studied between physical parameters and IVC diameter which revealed a positive correlation of age, height and weight with both maximum and minimum IVC diameter. Regression analysis was also performed to derive the equations for maximum and minimum diameters of children from 1 y to 12 y.

This study provides reference values of IVC diameters for Indian children of different age groups.