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Roentgenopelviometry (roentgenocephalopelvimetry)
Last reviewed: 20.11.2021
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X-ray pellvimetry allows you to study the structure of the pelvis, the shape of the entrance to it, the slope of the pelvic wall (rectilinear, convergent, divergent), the shape and protrusion of the sciatic forearms, the degree of curvature of the sacrum (expressed or flattened), the inclination of the base of the sacrum and its apex forward or backward, (wide, middle, narrow), to determine the straight and transverse diameters of the small pelvis, the size of the fetal head relative to the pelvic planes, tumors of the pelvic bones, pelvic fractures, symphysis width, etc.
X-rays can be performed in 38-40 weeks of pregnancy, during childbirth and in the postpartum period for retrospective assessment of the pelvis after complicated delivery and for the prediction of future births.
Indications:
- suspicion of anatomical changes in the pelvis;
- an indication in the history of a complicated course and a poor outcome of labor;
- pelvic presentation of the fetus, large, giant fruit, vagueness of the present part of the fruit;
- suspicion of a disparity between the size of the pelvis and the head of the fetus.
With the help of X-ray pellvimetry, 6 internal pelvic diameters are usually determined: 3 transverse and 3 straight, as well as the size of the anterior and posterior segments of the pelvis and, ultimately, it is possible to classify the pelvis according to its shape and degree of constriction.