In pediatrics, comparison of IVC to aorta ratio may be more reliable than respiratory variation of IVC alone
IVC-to-aorta ratio less than 0.8 has sensitivity of 86-93% and specificity of 54-59% for severe dehydration (compared to WHO dehydration scale which has sensitivity of 73%, specificity of 43%).
Subcostal view of IVC. Measure IVC at point of entry of hepatic vein or 2cm distal to cavoatrial junction. Measurements are taken at maximal diameters of structures (freeze and scroll back during cardiac and respiratory cycles).
Pediatric ultrasound
Neonatal resuscitation
Maternal vitals and labs in pregnancy
Pediatric antibiotics
Cardiac ultrasound
Aortic ultrasound
IVC ultrasound
Ultrasound 