Bilirubin

Neonatal jaundice is the yellowing of a newborn's skin and is caused by the buildup of bilirubin in the bodies of infant children.  Bilirubin exists at some level in all human beings, and is a breakdown product of red blood cells.  Due to the fact that our bodies are able to excrete bilirubin, these levels usually remain quite low in humans of most ages.  Bilirubin is responsible for the yellowish tint around the edges of bruises on our skin, as well as the yellow coloration of our urine.

Newborns are unable to excrete bilirubin, and in high levels, it is toxic to their system.  In order for it to be passed through their body, it must be converted into other water soluble substances that are excreted more easily.  In newborns, a process called phototherapy (exposing the infant to blue light at wavelengths of 420-450) oxidizes, converts, and reduces the level of bilirubin in their system.  Oliver had some initial bruising on his feet and legs that occurred during delivery.  With this bursting of red blood cells came an increase in bilirubin.  Since delivery, his bilirubin levels have been up and down, and he has had phototherapy treatments on and off for the last 8 days or so.  This isn't uncommon, and he could continue the treatment for another few days.  We actually think he kind of likes the blue light.  Better than all of this Oregon rain.