Methods: Plasma levels of ET?1 and CGRP was measured in 24 full?term newborns with asphyxia and 18 controls on the first and fifth days after birth by using radioimmunoassay.

• 方法：对24例足月新生儿窒息患儿及18例对照新生儿，用放射免疫学方法测定出生后第1天和第5天血浆ET?1及CGRP浓度。