Monitoring brain function during cardiothoracic surgery in children and adults at two levels of hypothermia.
The EEGs of 9 infants and 9 adults undergoing cardiac surgery were analysed during 2 different temperature ranges. Variance analysis showed that there were very significant interactions between age and temperature effects (P less than 0.01) and between temperature and specific frequency bands (P less than 0.005). These interactions were studied further and the greatest changes were discovered in the infant group when the temperature fell from the upper to the lower hypothermic range: low delta activity increased significantly while those of alpha and theta fell significantly. The significant quantitative differences found in this study agree with qualitative observations from other reports.
Glaría
A P
AP
Departamento de Fisiologia Normal y Patologica, Universidad de Valparaiso, Chile.
Murray
A
A
D000367:Age Factors; D000704:Analysis of Variance; D001831:Body Temperature; D006348:Cardiac Surgical Procedures; D002540:Cerebral Cortex / Q000502:physiology*; D002675:Child, Preschool; D004566:Electrodes; D004569:Electroencephalography; D005260:Female; D005583:Fourier Analysis; D006801:Humans; D007036:Hypothermia, Induced; D007223:Infant; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic