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Chinese Journal of Neonatology ; (6): 183-187, 2015.
Artículo en Chino | WPRIM | ID: wpr-464039

RESUMEN

Objective To study the effects of preterm birth, infection, pathological jaundice and asphyxia on neonatal thyroid function. Methods From April 2012 to April 2014,neonates within 7 days after birth admitted to the neonatal department of our hospital were recruited. The neonates with one or more of the 4 aforementioned conditions were assigned to the observation group; the full-term newborns without any diseases to the control group. 2 ml of venous blood from each patient was collected 5-7 days after birth to determine the levels of serum free iodine thyroid original glycine ( FT3 ) , free thyroxine ( FT4 ) and thyroid stimulating hormone ( TSH ) . The thyroid function of newborns in the observation group were re-examined after recovery, and compared among different groups and conditions. Results A total of 220 newborns were recruited in the observation group and 34 in the control group. FT3 in the observation group was significantly lower than the control group ( P<0. 05 ) . As for FT4 and TSH, no statistically significant differences existed between the two groups ( p>0. 05 ) . FT3 and FT4 in neonates with severe infection were significantly lower than mild infection ( P<0. 05 ) . FT3 in the preterm group with gestational age ( GA ) ≤32 weeks was significantly lower than GA>32 weeks, and FT3 in the jaundice group, serum bilirubin level ≥ 342 mol/L group significantly lower than <342 mol/L group (P<0. 05) . In the observation group, the re-examined FT3 concentration was significantly higher (P<0. 05) than the result tested 5-7 days after birth while FT4 and TSH didn′t show significant differences. And no significant differences existed between the observation group and the control group in re-examined thyroid functions ( P>0. 05 ) . The multivariate analysis showed that GA, pathological jaundice, infection and asphyxia were associated with FT3 concentration 5-7 days after birth (P<0. 05), while the delivery method and gender not (P>0. 05). Conclusions The main effect of preterm birth, infection, pathological jaundice and asphyxia on thyroid function was to decrease FT3 temporarily. Severe infection might decrease FT4 temporarily. However, the thyroid function would return to normal with recovery.

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