[Examination of cerebral electrical admittance plethysmogram in healthy newborns].
OBJECTIVE
Cerebral electrical admittance plethysmography is a novel noninvasive technique for evaluating cerebral hemodynamics. This study aimed to measure the reference values of cerebral electrical admittance plethysmogram in healthy newborns.


METHODS
Bilateral cerebral electrical admittance plethysmography was performed in 40 healthy newborns.


RESULTS
The values of various indexes of cerebral electrical admittance plethysmogram in 40 newborns were obtained by this technique. The index of Admittance Differential Loop (ADL) I+II at the third and fourth days after birth was significantly higher than that at the first day of life (P < 0.05). There were significant differences in the index of ADL I+II and the ratio of Hs to b-S (Hs/ b-S) among different birth weight groups (P < 0.05). No significant differences were found in all the indexes of cerebral electrical admittance plethysmogram between the left and right brain of newborns. Gender and parturition mode had also no effects on these indexes.


CONCLUSIONS
The research reported the reference values of cerebral electrical admittance plethysmogram in healthy newborns. The postnatal age and birth weight are influencing factors for the cerebral electrical admittance plethysmogram.
Zhou
Ke-Yimg
KY
Department of Pediatrics, Second Affiliated Hospital of Jinan University Medical College, Shenzhen, Guangdong 518020, China. keyingzhou@163.com
Song
Jin-Zhi
JZ
Li
Jing-Zhi
JZ
Luo
Hui
H
Xiao
Xue-Chang
XC
Li
Zhi-Guang
ZG
Wu
Ben-Qing
BQ
D000367:Age Factors; D001724:Birth Weight; D002560:Cerebrovascular Circulation; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D010991:Plethysmography / Q000379:methods*; D012016:Reference Values