K. Saatvedt et al., THYROID-FUNCTION DURING AND AFTER CARDIOPULMONARY BYPASS IN CHILDREN, Acta anaesthesiologica Scandinavica, 42(9), 1998, pp. 1100-1103
Background: The aim of the study was to elucidate the changes in thyro
id function during and after cardiopulmonary bypass (CPB) in children.
Methods: Triiodothronine (T3), thyroxine (T4), free thyroxine (FT4) a
nd thyroid-stimulating hormone (TSH) were determined preoperatively, a
t specific times throughout CPB, and serially up to 48 h postoperative
ly, in 10 children (median age 35, range 23-68 months) undergoing elec
tive surgery for congenital heart disease. Results: T3 decreased from
2.01+/-0.08 preoperatively to 0.94+/-0.10 nmol/l 24 h postoperatively
(P<0.05). T4 levels followed a pattern similar to changes in T3. FT4 i
ncreased from 17.4+/-0.7 preoperatively to 30.0+/-0.4 pmol/l after 30
min of CPB (P<0.05). TSH decreased from 2.44+/-0.43 preoperatively to
0.93+/-0.21 24 h postoperatively (P<0.05). Conclusion: T3, T4 and TSH
are significantly depressed after open heart surgery in children.