Figure 2From: The BUDDY (Bedside Ultrasound to Detect Dehydration in Youth) studyUltrasound image of the transverse inferior vena cava to aorta (IVC/Ao) diameter measurement in a child with an IVC/Ao ratio >0.8 (no dehydration) above and <0.8 below (significant dehydration). Ao, aorta; IVC, inferior vena cava.Back to article page