观察组的大脑中动脉血流速值异常率为100%。
Abnormal blood flow of middle cerebral artery occurred in 100% of the observation group.
方法比较44例脐绕颈剖腹产胎儿与61例脐绕颈自然分娩胎儿的脐动脉及大脑中动脉血流多普勒参数，以RI及VP为分析指标。
Method To compared with UA and MCA's Doppler parameter in the 44 cases umbilical cord around neck by caesarean section fetus and 61 cases by parturition fetus, take ri and VP as analysis target.
大鼠的大脑中动脉可分三段，中段较长，分支较少，表面为蝶骨大翼覆盖。
The middle cerebral artery was divided into three section, the middle section was relatively longer with less branches, the surface was covered sphenoid bone greater wing.
大鼠的大脑中动脉可分三段，中段较长，分支较少，表面为蝶骨大翼覆盖。
The middle cerebral artery was divided into three section, the middle section was relatively longer with less branches, the surface was covered sphenoid bone greater wing.
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