TcB, or Transcutaneous bilirubinometer, isn't directly used during pregnancy. Instead, TcB is used after the baby is born to screen for jaundice. However, the question could be understood in the context of anticipating its use for the newborn. Let's explore what TcB is and its use in newborns.
TcB Explained
A transcutaneous bilirubinometer (TcB) is a non-invasive device used to estimate bilirubin levels in newborns. It works by shining a light through the skin and measuring how much light is absorbed. Bilirubin absorbs light, so the more bilirubin there is, the more light will be absorbed.
How TcB is Used in Newborns
- Screening for Hyperbilirubinemia: According to research, TcB is effective for screening for hyperbilirubinemia (high bilirubin levels, which can cause jaundice) in late preterm and term newborns (≥ 35 weeks gestation).
- Non-Invasive Measurement: It provides a quick and painless way to estimate bilirubin levels without the need for a blood draw. This makes it a valuable tool for routine screening in newborns.
- Confirmation with Blood Test: If the TcB reading is high, it's typically followed up with a total serum bilirubin (TSB) blood test to confirm the results.
Why TcB is Important
Jaundice is common in newborns, and in most cases is harmless. However, very high bilirubin levels can be dangerous and lead to brain damage if left untreated. TcB allows medical professionals to identify babies at risk for severe hyperbilirubinemia early on so treatment can be started.
Practical Insights
- TCB is a screening tool, not a diagnostic tool.
- A TSB (blood test) is needed to confirm hyperbilirubinemia suggested by TcB results.
- TcB is most accurate in babies ≥ 35 weeks gestation.
