经会阴超声测量产程进展角和大脑中线角在产程监测中的应用.

Objective: To observe the variation and clinical significance of the angle of progression (AOP) and the midline angle (MLA) in stage of labor. Methods: Transperineal ultrasound were performed in 97 single cephalic term pregnancies. AOP and MLA were performed when the cervix enlarged at 2-3 cm,4-5 cm,7-8 cm and 9-10 cm. We analyzed the relationship between AOP and MLA. Results: Along with the birth process, the AOP is gradually increasing while the MLA is reduced gradually. There was a negative correlation between AOP and MLA. Conclusions: The transperineal ultrasound can be used in monitoring of the stages of labor,and exploite the advantages of noninvasiveness, convenience, reduce infection and repeatability. [ABSTRACT FROM AUTHOR]