The Pelvis and Perineum

Question 1

Answer 1

Question 2

Answer 2

Question 3

which parts of the pelvis are termed the true pelvis?

Answer 3

True (lesser) pelvis is:
- between the pelvic inlet and pelvic outlet
- the location of the pelvic viscera: urinary bladder and reproductive organs
- bounded by the pelvic surfaces of the hip bones, sacrum and coccyx
- limited inferiorly by the musculomembranous pelvic diaphragm

Question 4

which parts of the pelvis are termed the false (greater) pelvis?

Answer 4

The false (greater) pelvis is:
- superior to the pelvic inlet
- bounded by the abdominal wall anteriorly, the ala of the ilium laterally, and the L5-S1 vertebrae posteriorly
- the location of some of the abdominal viscera, such as the sigmoid colon and some loops of ileum.

Question 5

what type of joint is the sacroiliac joint?

Answer 5

synovial plane joint, non-axial (is irregular)
- some literature says It’s a hybrid joint, with one part being a synovial joint (the lower part) and the other a fibrous joint (the upper part).

Question 6

what type of joint is the pubic symphysis?

Answer 6

secondar cartliaginous joint (symphyses)

Question 7

is this a male or female pelvis?

Answer 7

male

Question 8

is this a female or male pelvis?

Answer 8

female

Question 9

Answer 9

Question 10

With regards to the female pelvis and normal vaginal delivery:
- what is the narrowest diameter of the pelvic inlet (obstetric/true conjugate)?
- what is the narrowest diameter of the pelvic outlet

Answer 10

• 11cm
• 9-11.5 cm