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Jaundice Work-Up and Management After Threshold for Phototherapy

EN3 August 2024· 2 min read
Uniqcret doctor knowledgesPediatricPediatric Newborn

Initial Work-Up

  1. Complete Blood Count (CBC) and Peripheral Blood Smear (PBS)
    • CBC: Assess overall health, detect anemia, infection, and other disorders.
    • PBS: Identify abnormal red blood cell shapes, which may indicate hemolytic diseases.
  2. Reticulocyte Count
    • Purpose: Measure young red blood cells, which can indicate the bone marrow's response to anemia.
  3. Glucose-6-Phosphate Dehydrogenase (G6PD) Deficiency
    • Purpose: Screen for G6PD deficiency, a common cause of hemolytic jaundice.
  4. Blood Group (ABO and Rh) of Both Mother and Child
    • Purpose: Identify ABO or Rh incompatibility which can cause hemolytic disease of the newborn.
  5. Direct Antiglobulin Test (DAT) or Coombs Test
    • Purpose: Detect antibodies that are bound to the surface of red blood cells, indicating immune-mediated hemolysis.

Follow-Up

  1. Hematocrit (HCT)
    • Purpose: Measure the proportion of red blood cells in the blood to assess anemia.
  2. Methemalbumin (MB)
    • Purpose: Identify significant hemolysis, as methemalbumin is released during hemolysis.

Management After Phototherapy Threshold

  1. Phototherapy
    • Indication: Initiate when bilirubin levels reach the threshold according to guidelines based on age in hours and risk factors.
    • Goal: Reduce bilirubin levels through photo-oxidation, making bilirubin more water-soluble and easier to excrete.
  2. Hydration
    • Purpose: Maintain adequate hydration to enhance bilirubin excretion.
  3. Monitoring Bilirubin Levels
    • Frequency: Regular monitoring of serum bilirubin levels to assess the effectiveness of phototherapy and decide on continuation or escalation of treatment.
  4. Exchange Transfusion (if necessary)
    • Indication: Consider if bilirubin levels are dangerously high or if there are signs of acute bilirubin encephalopathy despite intensive phototherapy.
    • Goal: Rapidly decrease serum bilirubin levels and remove antibody-coated red blood cells.

Summary

This structured approach ensures a comprehensive evaluation and management plan for jaundiced infants requiring phototherapy. Continuous monitoring and timely interventions based on guidelines are crucial to prevent complications such as kernicterus.