How is Pelvimetry performed?

Pelvimetry assesses the size of a woman’s pelvis aiming to predict whether she will be able to give birth vaginally or not. This can be done by clinical examination, or by conventional X‐rays, computerised tomography (CT) scanning, or magnetic resonance imaging (MRI).

What are the external pelvic dimensions?

Diameters of the Pelvic Inlet The anteroposterior (or “conjugate”) diameter is the distance between the pubic symphysis and the sacral promontory. Three distances are: The anatomical conjugate or true: Measured between the sacral promontory and the upper edge of the pubic symphysis and measures an average of 11.0 cm.

What is a contracted pelvis in pregnancy?

Contracted Pelvis. Definition. Anatomical definition: It is a pelvis in which one or more of its diameters is reduced below the normal by one or more centimeters. Obstetric definition: It is a pelvis in which one or more of its diameters is reduced so that it interferes with the normal mechanism of labour.

What pelvis type is suitable for pregnancy?

The gynecoid pelvis is thought to be the most favorable pelvis type for a vaginal birth. This is because the wide, open shape give the baby plenty of room during delivery. Android. The narrower shape of the android pelvis can make labor difficult because the baby might move more slowly through the birth canal.

What is measured in clinical Pelvimetry?

Pelvimetry is the measurement of the female pelvis. It can theoretically identify cephalo-pelvic disproportion, which is when the capacity of the pelvis is inadequate to allow the fetus to negotiate the birth canal.

How is pelvic bone measured for delivery?

The pelvic bones that affect the baby’s rotation and delivery are the pubic bone in the front, the distance between the pubic bone and the sacrum, and the width of the ischial spines (the most narrow part of the pelvis). “These measurements are what correlate to the type of pelvis a woman has,” Carola adds.

How do I know what type of pelvis I have?

What do you need to know about pelvimetry?

It considered routine performance of pelvimetry to be a waste of time, a potential liability, and an unnecessary discomfort. The terms used in pelvimetry are commonly used in obstetrics. Clinical pelvimetry attempts to assess the pelvis by clinical examination.

What is the transverse diameter of the pelvic bone?

•Transverse diameters: o Bituberous diameter = 11 cm  between the inner aspects of the ischial tuberosities. o Bispinous diameter = 10.5 cm  between the tips of ischial spines. Diameters of pelvic outlet 26. Pelvic anatomy • Bony pelvis • Pelvic diameters • Pelvic planes • Pelvic axes • Pelvic types • Pelvimetry

Can a pregnant woman go to labor regardless of pelvimetry?

However, clinical evidence indicate that all pregnant women should be allowed a trial of labor regardless of pelvimetry results. Theoretically, pelvimetry may identify cephalo-pelvic disproportion, which is when the capacity of the pelvis is inadequate to allow the fetus to negotiate the birth canal.

Can a pelvic exam detect cephalo pelvis disproportion?

It can theoretically identify cephalo-pelvic disproportion, which is when the capacity of the pelvis is inadequate to allow the fetus to negotiate the birth canal. However, clinical evidence indicate that all pregnant women should be allowed a trial of labor regardless of pelvimetry results.