What Is a Pelvic Sonogram?

The pelvis is the indispensable passage for the fetus. Its size, shape, and length of each diameter are directly related to whether the delivery can be performed smoothly. Clinical methods for measuring the pelvis include extra-pelvic and intra-pelvic measurements. Extra-pelvic measurement can indirectly reflect the size and shape of the pelvis, while intra-pelvic measurement can directly reflect the size and shape of the pelvis. This is to determine whether the pelvis is commensurate and determine whether the fetus can be delivered via vagina. Therefore, pelvic measurement is a prenatal checkup. Essential item.

Pelvic measurement

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The pelvis is the indispensable passage for the fetus. Its size, shape, and length of each diameter are directly related to whether the delivery can be performed smoothly. Clinical methods for measuring the pelvis include extra-pelvic and intra-pelvic measurements. Extra-pelvic measurement can indirectly reflect the size and shape of the pelvis, while intra-pelvic measurement can directly reflect the size and shape of the pelvis. This is to determine whether the pelvis is commensurate and determine whether the fetus can be delivered via vagina. Therefore, pelvic measurement is a prenatal checkup. Essential item.

Name

Pelvic measurement

category

Special inspection

The normal value of the anterior superior intersacral diameter is 23-26 cm, the normal value of the intersacral diameter is 25-28 cm, the external diameter of the zygomatic humor is greater than 18.5 cm, and the normal value of the intertrochanteric diameter is 28-31 cm. The normal diameter is 8.5-10 cm, and the pubic arch angle is 80 ° -90 °.

Whether the fetus can successfully deliver through the pelvis is related to both the size of the pelvis and the size of the fetus. Although the shape of the pelvis is normal, if the diameter is small, the fetus may be difficult to deliver although it is normal; however, when the shape of the pelvis is abnormal and the diameters are large enough, the delivery may not be difficult. If the pelvis is normal in size and the fetus is too large, dystocia can also occur when the fetus is not commensurate with the pelvis. If the fetus is small, it can deliver smoothly even if the pelvis is smaller. The pelvis is large and small, and the fetus is large and small. Even if the woman is pregnant, the size of the fetus is not the same every time. People to be checked: pregnant women

Observe the doctor's instructions when measuring the pelvis.

Examination methods: Extra-pelvic measurement and intra-pelvic measurement are widely used in clinical practice.

Bone birth canal abnormal dystocia, dystocia, abnormal birth canal, lateral dystocia, breech dystocia

Pubic pain in pregnant women, back pain in pregnant women

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