Hypovolemic shock results from an abnormal decrease in circulating volume. Water constitutes a much greater portion of an infant’s or a child’s body weight than it does an adult’s. and because the bulk of fluid volume in young children is located in the extracellular tissue spaces. Infants and young children are more susceptible to hypovolemic shock. Infants, with their large body surface area and increased metabolic rate. Also experience increased insensible fluid loss, thus compounding hypovolemia. Because of their small body size, even relatively small blood losses can result in hypovolemia.