Osteology of the Pelvis Flashcards Preview

ESA 4 - Reproductive System > Osteology of the Pelvis > Flashcards

Flashcards in Osteology of the Pelvis Deck (31):
1

What is the pelvis made up of? 

4 bones

2

What are the categories of bones in the pelvis? 

  • Innominate bones
  • Sacrum
  • Coccyx

 

3

What do the 2 innominate bones of the pelvis form? 

The iliac crest

4

Where do the 2 innominate bones of the pelvis join? 

At the sacrum and the coccyx

5

What is formed when the two innominate bones of the pelvis join at the sacrum and the coccyx? 

The pelvic girdle

6

What does the linea terminalis define? 

Where you enter the pelvis from the faux pelvis 

7

What does the linea terminalis consist of? 

  • Arcuate line
  • Pectineal line
  • Pubic crest

 

8

What osteological features do the innominate bones of the pelvis have? 

  • Ischial spine
  • Ischial tuberosity

 

9

What does the ischial spine seperate into? 

The greater and lesser sciatic notches

10

What is the function of the ischial tuberosity? 

It is the part of the pelvic girdle on which you sit 

11

What is the gynacological importance of the sacrum? 

The anterior superior edge of the first sacral vertebrae is very prominent, and projects into the pelvic cavity, which can be a problem when giving birth 

12

What is the 'false pelvis'? 

The greater pelvis, superior to the linea terminalis 

13

Does the false pelvis have any gynacological relevance? 

No 

14

What is the 'true pelvis'? 

The lesser pelvis, a bony canal that is solid and immobile

15

What is a 'good' pelvis for childbirth termed? 

A gynacoid pelvis

16

What are the features of a gyancoid pelvis? 

  • Round inlet
  • Straight side walls
  • Ischial spines not too prominent
  • Well rounded sciatic notch
    Well-curved sacrum
  • Sub-pubic arch greater than 90 degrees

 

17

What are the 'pelvic planes' of the pelvis? 

  • Pelvic inlet
  • Plane of greater diameter
  • Plane of least diameter
  • Pelvic outlet

 

18

What does a clinical assessment of the pelvis consist of? 

  • Measuring the anteroposterior diameter of the pelvic inlet 
  • Assessing the mid-pelvis
  • Assessing the pelvic outlet

 

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19

How is the obstetric conjugate measured? 

From the sacral promontory to the midpoint of the pubis symphysis 

20

What does the obstetric conjugate define? 

The minimum AP diameter 

21

What is the problem with the measurement of the anteroposterior diameter? 

It cannot be palpated, so must make an approximation using the diagonal conjugate

22

How is the diagonal conjugate measured? 

From the sacral promontory to the inferior border of the pubic symphysis 

23

How does the diagonal conjugate measurement compare to the obstetric conjugate? 

It is slightly smaller

24

How is the mid-pelvis assessed? 

  • Check for straight side walls
  • Bispinous diameter

25

What is meant by the bispinous diameter? 

Distance between the ischial spines

26

How is the pelvic outlet assessed? 

  • Infrapubic angle
  • Distance bewteen the ischial tuberosity

 

27

How are the ligaments of the pelvis involved in delivery? 

They provide some 'give' in delivery

28

What are the ligaments of the pelvis? 

  • Sacrospinous ligament
  • Sacrotuberous ligament

 

29

Where does the sacrospinous ligament run? 

Sacrum to ischial spine

30

Where does the sacrotuberous ligament run? 

Sacrum to ischial tuberosity 

31

What happens to the ligaments during pregnancy? 

Hormones serve to soften the ligament, to make them more stretchy and soften joints