Pelvimetry and Physiology

Question 1

Fetopelvic relationship: Define presentation

Answer 1

The part of the fetus presents first in maternal pelvis (the downward part) i.e breach, cephalic

Question 2

Fetopelvic relationship: define position

Answer 2

The relationship of the denominator to the sides/ front of back of maternal pelvis. i.e Occiput Posterior, Occiput Anterior. (How the babies head is rotated

Question 3

Fetopelvic relationship: define denominator

Answer 3

An arbitrarily point on the presenting part that is used to describe fetal position. Fro cephalic usually occiput, in face presentation may be mentum.

Question 4

Fetopelvic relationship: define Lie

Answer 4

Is baby longitudinal (vertical), transverse (sideways), oblique (diagonal). Relationship of the long axis of fetus to long axis of pregnant person.

Question 5

Fetopelvic relationship: define attitude

Answer 5

how tucked head is: flexion, extension, sinciput (military). The relation of fetal parts to each other

Question 6

What fetal head diameter will come through is an flexed OA baby?

Answer 6

subocciptobragmatic

Question 7

Which directions is baby’s head relative to maternal head in LOT?

Answer 7

The occiput (back of babies head) is on maternal left side

Question 8

Which direction is baby’s head relative to maternal head in ROT?

Answer 8

The occiput (back of babies head) is on maternal right side

Question 9

What is the biparetal diameter?

Answer 9

The side to side diameter of baby’s head. Used for determining station. (parietal bones skull bones on side of head)

Question 10

What is another name for the anterior suture?

Answer 10

Bregma

Question 11

What fetal head diameter will be frist in a sinciput (Military) attitude

Answer 11

occiptofrontal

Question 12

What fetal head diameter will be first in bay whose head is extended?

Answer 12

occiptomental

Question 13

Fetopelvic relationship: define engagement

Answer 13

the point at which the widest part of the presenting part is below the pelvic inlet (not just caput)

Question 14

Describe geometry of Gynecoid pelvis

Answer 14

basically round. similar transverse and anteroposterior diameter, wide pelvic arch greater than 90 degrees. Most common in women , considered optimal

Question 15

Describe Android pelvis

Answer 15

Heart shapes narrow anterior segment (fore-pelvis). Pubic arch less than 90 degrees, prominent ischial spines More common in men

Question 16

Describe Anthropoid pelvis

Answer 16

Oval. longer anteriorposterior dimension. Ischial spines medium in prominanace. Posterior inclined sacrum. Most room in posteriour segment for fetal head. More common in non-white women.

Question 17

Describe playpelloid pelvis

Answer 17

Much wider in transverse than anteriorposterior. Rareset shape, not conducive to fetal rotation.

Question 18

Describe the sacrospinous ligament

Answer 18

It connects sacrum to isheal spines. It is triangular is shape, anterior to sacrotuberous ligament, but connected ti ite.

Question 19

Describe the sacrotuberous ligament

Answer 19

It connects sacrum and coccyx to the tuberosity of the ishium. it is in the posterior part of the pelvis.

Question 20

What are the cardinal movements of birth (8)?

Answer 20

1. engagement
2. descent
3. flexion
4. internal rotation
5. extension
6. restitution
7. external rotation
8. delivery of posterior shoulder

Question 21

How do cervical change patterns differ between nuliparous patients and multiparous ones?

Answer 21

Engagement and effacement generally happen first in nulips. Engagement 1-3 weeks before labor. All can happen simultaneously in multips.