How to measure conjugata anatomica?

Last Update: April 20, 2022

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Asked by: Marian Goldner
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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. The obstetric conjugate: Measured from the sacral promontory to the point bulging the most on the back of the symphysis pubis, located about 1 cm below its upper border.

How is the pelvic outlet measured?

Pelvic outlet: The pelvic outlet is the distance between the ischial tuberosities and the pubic arch. It usually exceeds 10 cm.

How do you find the obstetric conjugate?

Antero -posterior diameters:
  1. Anatomical antero-posterior diameter (true conjugate) = 11cm. from the tip of the sacral promontory to the upper border of the symphysis pubis.
  2. Obstetric conjugate = 10.5 cm. ...
  3. Diagonal conjugate = 12.5 cm. ...
  4. External conjugate = 20 cm.

How do you assess pelvic adequacy?

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 4 types of pelvis?

Although pelvises can be classified according to diameter, in obstetric practice they are often divided into 4 main types: gynecoid, android, anthropoid, and platypelloid, based mainly on the shape of the pelvic inlet [5].

The Pelvic Outlet, Diagonal conjugate and External conjugate

22 related questions found

What should be the pelvic size for normal delivery?

The diagonal conjugate is the measurement from your pubic symphysis, aka the pubic bone, to your sacral promontory, aka the tail bone. Ideally, this distance should be roughly 11-12 cm. Assuming that a baby's head is ~10cm, a baby should fit through the pelvic outlet if the diagonal conjugate is 11-12cm.

How do I know what type of pelvis I have?

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.

What are the 4 types of the pelvis and their descriptions?

The four different pelvis shapes are:
  • Gynecoid. This is the most common type of pelvis in females and is generally considered to be the typical female pelvis. ...
  • Android. This type of pelvis bears more resemblance to the male pelvis. ...
  • Anthropoid. An anthropoid pelvis is narrow and deep. ...
  • Platypelloid.

What is the true conjugate?

[TA] the diameter that represents the shortest diameter through which the head must pass in descending into the superior strait and measures, by means of x-ray, the distance from the promontory of the sacrum to a point on the inner surface of the symphysis a few millimeters below its upper margin.

What is an obstetric pelvis?

The pelvis is made up of the two innominate bones (which occupy the front and sides) and the sacrum and coccyx (which are behind). ... The sacroiliac joint is the most important, linking the sacrum to the iliac part of the innominate bones. The symphysis of the pubis joins the two pubic bones.

How do you find the diagonal of a conjugate?

A normal diagonal conjugate measures approximately 12.5 cm, with the critical distance being 10 cm. To measure the diagonal conjugate place the tip of the middle finger at the sacral promontory and note the point on the hand that contacts the pubic symphysis (Figure 131-1B).

What is the difference between the pelvic inlet and outlet?

The pelvic outlet also called the inferior pelvic aperture, defines the lower margin of the lesser (true) pelvis. ... This space is enclosed between the pelvic inlet and the pelvic outlet. The pelvic outlet is the inferior opening of the pelvis that is bounded by coccyx, the ischial tuberosities, and the pubis symphysis.

What are the three diameters of the pelvic outlet?

[1] The dimensions of its anteroposterior, oblique, and transverse diameters vary according to the morphological type of the pelvis.

What are the landmarks of pelvis?

Pelvic Landmarks
  • 1.1 Iliac Crests.
  • 1.2 Greater trochanter of the femur.
  • 1.3 Anterior superior iliac spine - ASIS.
  • 1.4 Pubic symphysis.
  • 1.5 Sacral spines.
  • 1.6 Coccyx.
  • 1.7 Posterior superior iliac spine - PSIS.

What is a true pelvis?

The true pelvis contains the pelvic colon, rectum, bladder, and some of the reproductive organs. The rectum is at the back, in the curve of the sacrum and coccyx; the bladder is in front, behind the pubic symphysis.

What are the abnormalities of pelvis?

Female Pelvic Disorders
  • Pelvic organ prolapse. ...
  • Vesicovaginal fistula, urethrovaginal fistula, ureterovaginal fistula, rectovaginal fistula. ...
  • Incontinence. ...
  • Overactive bladder. ...
  • Female sexual function. ...
  • Urethral diverticulum.

Where is pelvic pain located?

Pelvic pain occurs mostly in the lower abdomen area. The pain might be steady, or it might come and go. It can be a sharp and stabbing pain in a specific spot, or a dull pain that is spread out. If the pain is severe, it might get in the way of your daily activities.

Does your pelvis separate during childbirth?

The left and right bones of your pelvic girdle are joined at the front by a narrow section of cartilage and ligament. This is called the pubic symphysis, or symphysis pubis. As the pelvic bones loosen during pregnancy, the pubic symphysis can temporarily separate. This is not a dangerous condition.

Does the size of your feet determine the size of your pelvis?

So a large foot would equal a large opening in the pelvis and hopefully an easier birth, and, a smaller shoe would mean a smaller opening, and therefore a potentially more difficult birth.

How do you open your pelvis?

Coming into a wide leg squat position helps open the pelvis, and gravity will naturally promote lengthening in the pelvic floor. This is best performed as a repetitive exercise instead of a position that is held. Step your feet wider then your hips, with your feet angled out slightly.

What is the true and false pelvis?

The true pelvis contains the pelvic colon, rectum, bladder, and some of the reproductive organs. The false pelvis supports the intestines (specifically, the ileum and sigmoid colon) and transmits part of their weight to the anterior wall of the abdomen.

Can you give birth with narrow hips?

Baby's size

The baby might be slightly wider than the hips, and if so, this could potentially slow down delivery. Just the same, a woman with a narrow-shaped pelvis — which typically makes it more difficult to deliver — may have a smoother birth due to delivering a smaller baby.

How can I prepare my body for normal delivery?

  1. Know why you want an unmedicated birth. ...
  2. Enroll in childbirth classes. ...
  3. Create a "natural birth" plan. ...
  4. Pick a health care provider who's into "natural birth." ...
  5. Learn to face contractions. ...
  6. Know how to squat. ...
  7. Start an exercise routine. ...
  8. Spend early labor at home.

What exercise can I do to open my cervix?

Walking around the room, doing simple movements in bed or chair, or even changing positions may encourage dilation. This is because the weight of the baby applies pressure to the cervix. People may also find swaying or dancing to calming music effective.