Week 4.1 - Osteology of the pelvis

Question 1

What is linea terminalis?

Answer 1

-Boundary of entry into the true pelvis (lesser pelvis)

Question 2

Describe a gynecoid pelvis

Answer 2

• Round inlet
• Straight side walls
• Ischial spines not too prominent
• Well-rounded greater sciatic notch
• Well curved sacrum
• Infrapubic angle > 90 degrees

Question 3

What is assessed during a pelvic clinical assessment?

Answer 3

• Pelvic inlet (anteroposterior diameter)
• Mid-pelvis (straight sidewalls and bispinous diameter)
• Pelvic outlet (Distance between iscial tuberosities and infrapubic angle)

Question 4

What are the pelvic conjugates?

Answer 4

• Measurements of the anteroposterior diameter of the pelvis
• Anatomic conjugate from sacral promontory to superior border of pubic symphysis
• Obstetric conjugate from sacral promontory to midpoint pubic symphysis
• Diagonal conjugate from sacral promomtory to inferior border of pubic symphysis

Question 5

Name the 3 major ligaments of the pelvis

Answer 5

• Sacrospinous
• Sacrotuberous
• Sacroiliac

Question 6

What bones make up the pelvis?

Answer 6

• 2 innominate bones (hip bones)
• Sacrum
• Coccyx