Pelvis

Question 1

Bony Pelvis

Answer 1

Ilium, ischium & pubis

sacrum

coccyx

joined by pubic symphysis ant

sacro iliac joint post

Question 2

Sacrum and coccyx

Answer 2

Question 3

Joints & Ligaments

Answer 3

Sacroiliac joint

• ant- synovial
• post- syndesmosis

Pubic Symphysis

• secondary cartilaginous

Lumbosacral joint

• IV joint foremd by L5/S1

Sacrococcygeal joint

Question 4

Sacroilial Joint

Answer 4

Sacrum sinks into pelvis

Question 5

Symphysis pubic

Answer 5

Synchondrosis

Obturator Membrane

Question 6

Pubic Arch

Answer 6

Different for men and women

Question 7

Statics of Pelvis

Answer 7

Sacrum suspended in pelvic ring by many ligaments

Motion is restricted by balanced T of these ligaments

Question 8

Pelvic Cavity

Answer 8

Enclosed by bony, ligamentous & muscular wall

Contains urinary bladder, ureters, pelvic genital organs, rectum, blood vessles, lymphatics & nerves

Pelvic Inlet (sup pelvic aperature)

Pelvic outlet (inf pelvic aperature)

Question 9

Greater/false & Lesser/true Pelvis

Answer 9

Question 10

Superior Pelivc Aperature

Answer 10

Horizontal line the longets

Question 11

Inferior Pelvic Aperature

Answer 11

Question 12

Inferior Pelvic Border

Answer 12

Question 13

Pelvic Diameters

Answer 13

Size of lesser pelvis important in obstetrics since fetus passes through there in vaginal birth

Use diagonal conjugate by palpating sacral promontory with tip of mid finger

Question 14

Pelvic Axis- pelvic inclination

Answer 14

Pelvic axis= imaginary curved line that passes through centers of various anteropost diameters of pelvis

pelvic inclination= incilination of pelvis the angle between the plane of pelvic inlet & horizontal plane

Question 15

Pelvic Variations

Answer 15

Question 16

Pelvic Injuries

Answer 16

Fracture of all four pubic rami (head on collision)

Fracture of acetabulum (sky diving)

Question 17

Spondylolysis- Spondylolisthesis

Answer 17

Low back pain in adolescent

Stress fracture in one of vert- spondylolysis L5 or L4 (less common)

Spondylolisthesis- when bone so weak that unable to maintain proper position & vert shift out of place

Question 18

Walls

Answer 18

Ant- by bodies & rami of pubic bones & pubic symphysis

Lat- hip bones & obturator internus m.

Post- sacrum & coccyx, adj ilia & SI joint, piriform m. covers A. Pudendal n. goes through pudendal canal (splitting obturator fascia)