Many parents are concerned about whether it is safe for their child to receive phototherapy treatment. Here, Dr. Zhang introduces you to this method that we use most often when treating children with jaundice. Blue light exposure is an easy, effective and quick way to treat jaundice in newborns. Jaundice is a high level of bilirubin in the baby’s body. Bilirubin absorbs light, and under the action of light and oxygen, the fat-soluble bilirubin oxidizes into a water-soluble product that can be excreted from the bile or urine, thus reducing the serum unconjugated bilirubin concentration. The absorption band of bilirubin is 400-500 mM, especially the strongest decomposition effect at 420-440 mM, and the wavelength of blue light is exactly between 425-475 mM. The treatment principle of blue light therapy is that through the light, the bilirubin in the body can be converted into other substances, so that the body continues to accumulate bilirubin to find another outlet, the symptoms of jaundice can be improved. 1, light treatment 1, light source: blue light is best (the main peak wavelength of 425-475nm), you can also choose white light (wavelength 550-600nm) or green light (wavelength 510-530nm). 2, method: single-sided light therapy, double-sided light therapy, blanket fiber optic jaundice treatment method. 3, time: divided into continuous and intermittent irradiation. The former is 24h continuous irradiation; the latter is shining 10-12h, intermittent 14-12h. Whatever the method, should depend on the condition. 4, during phototherapy need to closely monitor the serum bilirubin concentration, generally 12-24h measured once, for hemolytic disease and serum bilirubin concentration close to the index of blood exchange, should be measured every 4-6h serum bilirubin and erythrocyte pressure product. After the completion of phototherapy, continuous monitoring was performed for 2 d to observe any rebound phenomenon. When the rebound value exceeds the pre-phototherapy level, phototherapy is required again. Second, phototherapy precautions 1, continuous use of the lamp 2000-2500h need to replace the new lamp. In the treatment of Rh hemolysis and other severe hyperbilirubinemia, should be replaced with a new lamp. 2, the phototherapy box to preheat, to be under the lamp temperature at about 30 ℃ before putting the child into. 3, with black, slightly stiff opaque paper or cloth to cover the eyes, diapers to cover the genitals. 4. Because of the increase of non-significant water loss during phototherapy, the amount of fluid should be increased by 15%-20% [in ml/(kg・d)] during phototherapy. Third, the side effects of phototherapy Currently, phototherapy is considered quite safe, basically no significant complications. There are some relatively mild and transient complications. Common manifestations include fever, diarrhea, skin rash, riboflavin deficiency, bronchitis and low blood calcium. So please don’t worry too much about your little one, after the jaundice subsides, we will notify the parents to take the child home from the hospital, and when the time comes, remember that the blue light box has also made a big contribution!