Pelvis model-based parturition axis construction method

Abstract

The invention discloses a pelvis model-based parturition axis construction method, which comprises the following steps of: obtaining three-dimensional coordinates of a pubic symphysis upper edge, a pubic symphysis lower edge and a lumbosacral datum point of a pelvis of a to-be-tested person, and registering the three-dimensional coordinates with a three-dimensional coordinate system of a standardpelvis three-dimensional model to effectively and quickly obtain the three-dimensional coordinate system; obtaining three-dimensional coordinates of a pelvis entrance plane center point, a middle pelvis plane center point and a pelvis exit plane center point; and converting the three-dimensional coordinates of the pubic symphysis upper edge, the pubic symphysis lower edge, the pelvis inlet plane center point, the middle pelvis plane center point and the pelvis outlet plane center point into the coordinates of the three-dimensional coordinates on the ultrasonic image to obtain the coordinates of the production axis corresponding to the three-dimensional coordinate system of the pelvis three-dimensional model of the to-be-tested person on the ultrasonic image. The parturition axis construction method has the advantages of being easy to operate, high in accuracy, free of harm to pregnant women and fetuses and the like, and clinical application and popularization are facilitated.

Description

technical field [0001] The invention relates to the field of obstetrical monitoring, in particular to a method for constructing an obstetric axis based on a pelvis model. Background technique [0002] The birth axis is the trajectory of the center of the fetal head during natural childbirth, and it is also an imaginary axis connecting the midpoints of the pelvic planes. Accurately constructing the birth axis can provide a more convenient and accurate representation method for the digital and precise measurement of fetal position, and can also make up for the inadequacy of traditional fetal head position measurement methods that cannot be combined with modern monitoring equipment during labor. [0003] The Chinese invention patent application (Application No. 201910848455.1) discloses a production axis construction method. This method only roughly mentions the determination of the center point of the pelvic section, but it is difficult to achieve in actual operation and canno...

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Problems solved by technology

[0006] However, this method needs to obtain the production axis corresponding to the pelvis of the test subject. Using such complicated and cumbersome production axis construction steps will inevitably bring a lot of inconvenience to the actual operation, and it will also make it difficult to be widely used in clinical practice.

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