Pelvic bones

Question 1

Division between false and true pelvis

Answer 1

pelvic brim (or inlet)

Question 2

Boundaries (roof and floor) of the true pelvis

Answer 2

pelvic inlet (brim) + pelvic outlet

Question 3

Borders of the pelvic brim (inlet)

Answer 3

sacral promontory>sacroiliac joint> sacral alae> iliopectineal line> pubic rami>pubic symphysis

Question 4

Diameters of the pelvis

Answer 4

Transverse / oblique / anteriorposterior

Question 5

Anatomical anteroposterior conjugate of the pelvis

Answer 5

AP diameter - sacral promontory to pubic symphysis

Question 6

Diameter of the anatomical conjugate of the pelvis

Answer 6

11cm

Question 7

Obstetric conjugate of the pelvis

Answer 7

smallest AP diameter = sacral promontory to pubic symphysis

Question 8

Diagonal conjugate of the pelvis

Answer 8

AP diameter measure from bottom of pubic symphysis to sacral promontory - used to measure obstetric conjugate (minus 1.5-2cm)

Question 9

Normal obstetric transverse diameter length

Answer 9

13cm

Question 10

Oblique diameter of pelvis

Answer 10

12cm (Sacroiliac joint to iliopectineal line)