Blood Supply of the Ureters Flashcards

Review the segmental arterial supply, venous drainage, periureteric vascular network, and surgical anatomy of the ureters.

Card 1 of 24Question

What is the general pattern of arterial blood supply to the ureters?

A segmental supply from multiple arteries along their abdominal and pelvic course.

In This Section

1. What is the general pattern of arterial blood supply to the ureters?

A segmental supply from multiple arteries along their abdominal and pelvic course.

2. Which artery commonly supplies the uppermost portion of the ureter?

The renal artery through its ureteric branches.

3. Which artery commonly contributes branches to the middle abdominal ureter?

The gonadal artery, either the testicular or ovarian artery.

4. Which major artery can directly supply the abdominal ureter?

The abdominal aorta through small ureteric branches.

5. Which arteries can contribute to the ureteric blood supply near the pelvic brim?

The common iliac and internal iliac arteries through variable branches.

6. Which arterial system provides most of the blood supply to the pelvic ureter?

Branches of the internal iliac arterial system.

7. Which artery commonly supplies the distal ureter in males?

The inferior vesical artery.

8. Which artery supplies portions of the pelvic ureter in females near the cervix?

The uterine artery.

9. Which additional artery can supply the distal pelvic ureter in females?

The vaginal artery.

10. Which vesical artery can contribute to the blood supply of the terminal ureter in both sexes?

The superior vesical artery.

11. What is the periureteric arterial plexus?

A longitudinal network of anastomosing small arteries surrounding the ureter.

12. In which layer of the ureteric wall do the principal longitudinal arterial anastomoses run?

The adventitia.

13. From which direction do arterial branches generally approach the abdominal ureter?

Predominantly from its medial side.

14. From which direction do arterial branches generally approach the pelvic ureter?

Predominantly from its lateral side.

15. Why is the ureteric adventitia important for maintaining blood supply?

It contains the longitudinal vascular network that distributes blood between segmental arterial branches.

16. Where does venous blood from the upper ureter primarily drain?

Into renal and gonadal venous tributaries.

17. Where does venous blood from the pelvic ureter primarily drain?

Into tributaries of the internal iliac veins, including vesical venous channels.

18. What is the relationship between ureteric arteries and veins?

Small ureteric veins generally accompany the regional arterial vessels.

19. Why can extensive surgical dissection around the ureter cause ischemia?

It can disrupt the adventitial arterial plexus and its segmental vascular connections.

20. What surgical technique helps preserve ureteric blood supply?

Limiting circumferential dissection and preserving surrounding adventitial tissue.

21. How can interruption of the ureteric arterial supply affect the ureteric wall?

It can cause ischemic necrosis followed by fibrosis and stricture formation.

22. Why is preservation of periureteric tissue especially important during kidney transplantation?

The donor ureter depends heavily on periureteric vessels retained near the renal pelvis and proximal ureter.

23. What vascular complication can result from inadequate blood supply to a transplanted ureter?

Ureteric ischemia causing urinary leakage or anastomotic stricture.

24. Why does the ureter have multiple overlapping arterial sources?

Its long course crosses several anatomical regions supplied by different arteries.