Method: 248 neonates were selected at random, and the epicranial artery, radial artery, humeral artery and femoral artery were punctured respectively.

• 方法:随机选择248例次新生儿,分别在头皮动脉、桡动脉、肱动脉、股动脉4个部位穿刺抽取血气标本。