Additional pelvis

Question 1

what is the most common shape of female pelvis

Answer 1

50% are gynecoid

Round inlet!

Question 2

What is a straddle injury

Answer 2

fracture of all four pubic rami

• anterior to posterior pressure on pelvis
• car crash without seatbelt

Question 3

fracture of acetabulum

Answer 3

bilaterally can happen from jumping off a builiding (commonly assumed a suicide attempt)

if posteriorly, happens frequently tall males in car crash because force applied to femur posteriorly and blows through bone

Question 4

Open book fracture

Answer 4

fracture of the pelvis

high mortality rate due to soft tissue damage and exsanguination (bleeding out) associated with internal and external iliac aa. or retroperitoneal structures

disrupts pubic symphysis

Question 5

vesicorectal pouch

Answer 5

this is structure in males between the bladder and rectum

Question 6

rectouterine pouch

Answer 6

in females called this because uterus

pouch between rectum and uterus

Question 7

vesicouterine pouch

Answer 7

between bladder and uterus

Question 8

trace the typical arterial supply to the prostate beginning with abdominal aorta

Answer 8

abdominal aorta
common iliac a
internal iliac a
inferior vesical a

Question 9

trace the venous drainage of the prostate ending with inferior vena cava

Answer 9

vesical venous plexus
prostatic venous plexus
internal pudendal vein
inferior vesical v
superior vesical v
internal iliac v
common iliac v
inferior vena cava

Question 10

what are the nerve roots of pudendal nerve

Answer 10

S2, 3, 4 keep the poo off the floor

functions to innervate the anal sphincters and urethral sphincters

Question 11

which part of the internal iliac artery gives rise to the inferior gluteal artery versus the superior

Answer 11

inferior gluteal artery= from the internal iliac artery anterior division
(so does the uterine artery and internal pudendal artery and obturator artery)

superior gluteal artery arises from the posterior division of the internal iliac artery (so does medial umbilical ligament= oblitereated umbilical artery)

Question 12

describe the sympathetic nervous supply to prostate

Answer 12

T12-L1 origin

postganglionic fibers are vasomotor- control teh smooth muscle of the prostatic urethral sphincter

• that prevents ejaculate from entering the urinary bladder

Question 13

describe the parasympathetic innervation of the prostate

Answer 13

origin is S2-4

parasympathetic postganglionic innervate smooth muscle of the prostatic capsule

Question 14

What are common causes of injury t pelvic nerves

Answer 14

1. childbirth- child head push on nerves in sacral plexus
2. obturator nerve - vulnerable in surgery like lymph node removal
3. stretching of nerve to levator ani during vaginal birth = urinary / fecal incontinence