After operation, they were divided into two groups according to the character of the amniotic fluid, and compared their difference between gray scale (GS) and decibel (dB).

• 根据手术分娩后羊水性状分为正常羊水组 (16例 )及羊水粪染组 (11例 ) ,比较两组间EI灰阶 (gs)、分贝 (dB)差异。