diameter of pelvis


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Related to diameter of pelvis: true pelvis, interspinous diameter, conjugata vera

diameter of pelvis

Any diameter of the pelvis found by measuring a straight line between any two points. The diameters are:anteroposterior, the distance between the sacrovertebral angle and the symphysis pubis; bi-ischial, the distance between the ischial spines; conjugata diagonalis, the distance between the sacrovertebral angle and the symphysis pubis; conjugata vera, the true conjugate between the sacrovertebral angle and the middle of the posterior aspect of the symphysis pubis (about 1.5 cm less than the diagonal conjugate); intercristal, the distance between the crests of the ilia; interspinous, the distance between the spines of the ilium; intertrochanteric, the distance between the greater trochanters when the hips are extended and the legs are held together; and obstetrical conjugate, the distance between the promontory of the sacrum and the upper edge of the symphysis pubis.
See: pelvis
See also: diameter