The internal iliac artery (dave's notes)

Question 1

Describe the two main divisions of the internal iliac artery

Answer 1

Small posterior and large anterior branches

Question 2

Where does the common iliac artery bifurcate?

Answer 2

At the sacroiliac joint, with the internal iliac artery passing downwards

Question 3

Name the branches of the posterior division of the IIA

Answer 3

3 branches, all parietal; Iliolumbar, lateral sacral artery, superior gluteal

Question 4

Describe the groups of the anterior division of the internal iliac artery

Answer 4

3 associated with the bladder, 3 to other viscera, 3 parietal branches

Question 5

Name the three branches of the anterior division of IIA to the bladder

Answer 5

Superior vesical, inferior vesical, obliterated umbilical

Question 6

Name the three branches of the anterior division of the IIA to non-bladder viscera

Answer 6

Middle rectal, uterine artery, vaginal artery

Question 7

Name the three parietal branches of the anterior division of the IIA

Answer 7

Obturator artery, internal pudendal artery, interior gluteal artery

Question 8

Describe the course of the iliolumbar artery

Answer 8

The iliolumbar artery passes upwards out of the pelvis in front of the lumbosacral trunk deep to psoas

Question 9

What does the iliolumbar artery supply?

Answer 9

The lumbar branch (=L5 branch) supplies psoas and QL, and gives a small spinal L5 branch. The iliac branch supplies the iliac fossa and anastomoses around the ASIS

Question 10

What is the course of the lateral sacral artery? What does this supply?

Answer 10

The lateral sacral artery runs down lateral to the anterior sacral foramina supplying roots and piriformis

Question 11

What is the largest branch of the IIA?

Answer 11

The superior gluteal

Question 12

What is the course of the superior gluteal artery?

Answer 12

The superior gluteal exits through the greater sciatic foramen into the buttock

Question 13

What is the highest branch if the IIA?

Answer 13

The superior vesical artery

Question 14

What does the superior vesical artery arise from?

Answer 14

The persistent patent proximal part of the foetal umbilical artery. The distal part becomes the medial umbilical ligament.

Question 15

What is the course of the superior vesical artery?

Answer 15

The superior vesical artery runs along the side wall of th pelvis and then turns medial to reach the upper part of the bladder.

Question 16

What does the superior vesical artery supply?

Answer 16

The bladder, adjacent ureter and ductus deferens.

Question 17

What is the course of the inferior vesical artery, and what does it supply?

Answer 17

The interior vesical artery runs lower than the superior vesical, and supplies the trigone and lower bladder, ureter, ductus deferens, and SV ?? (plus prostatic artery ??)

Question 18

What does the obliterated umbilical artery supply?

Answer 18

Nothing you idiot. It is obliterated.

Question 19

What is the course of the middle rectal artery? What may it give off?

Answer 19

The middle rectal artery runs toward the lower rectal wall, dividing before entering the rectal wall. It may give off a prostatic artery.

Question 20

What is the course of the uterine artery?

Answer 20

The uterine artery crosses the pelvis at the base of the broad ligament, turning up at the cervix. It anastomoses with the ovarian artery.

Question 21

What is the vaginal artery a branch of?

Answer 21

The uterine artery.

Question 22

What is the course of the obturator artery?

Answer 22

The obturator artery passes along the side wall of the pelvis below the nerve to enter the obturator foramen. It gives a branch to PS??? periosteum (anastomosing with the IEA).

Question 23

What artery may be at risk when releasing a strangulated (what type of hernia????)

Answer 23

The obturator artery. ??obturator hernia presumeably??

Question 24

What is the course of the internal pudendal artery?

Answer 24

The internal pudendal artery lies in front of the inferior gluteal, piercing the parietal pelvic fascia. It exits through the greater sciatic foramen? to the perineum, anus and external genitalia.

Question 25

What is the course of the interior gluteal artery?

Answer 25

The inferior gluteal artery runs backwards through the greater sciatic foramen into the buttock.