Advanced Obturator Artery Quiz

Q1. What is an aberrant or replaced obturator artery?

• A branch of the portal vein
• A duplicated femoral vein
• A variant obturator artery arising from the external iliac or inferior epigastric system
• An obturator artery arising from the carotid artery

Q2. What does the term corona mortis refer to in pelvic vascular anatomy?

• A ligament between the sacrum and coccyx
• A lymphatic ring around the bladder
• A nerve loop around the sciatic notch
• A vascular connection over the superior pubic ramus

Q3. Why is the corona mortis clinically important?

• It commonly blocks the ureter
• It prevents hip movement
• It can cause significant bleeding if injured
• It produces cerebrospinal fluid

Q4. Which branch may accompany the ligament of the head of the femur toward the femoral head?

• Inferior rectal branch
• Acetabular branch
• Iliolumbar branch
• Urethral branch

Q5. Why is the acetabular branch generally less important for femoral head perfusion in adults than in children?

• Adults have no arterial supply to the femoral head
• Adult femoral head supply depends mainly on retinacular branches of the medial circumflex femoral artery
• The acetabular branch becomes a vein after puberty
• The femoral artery disappears in adults

Q6. Which arterial system commonly provides the vessel involved in a replaced obturator artery?

• Internal thoracic artery
• Posterior tibial artery
• Inferior epigastric artery
• Superior mesenteric artery

Q7. Why is knowledge of obturator artery variation important during hernia and pelvic surgery?

• It is never encountered near the pelvis
• Variant vessels may cross surgical fields near the superior pubic ramus
• The artery always lies inside the urinary bladder
• It routinely passes through the femoral nerve

Q8. How do the anterior and posterior branches of the obturator artery contribute to medial thigh circulation?

• They supply medial thigh structures and participate in local anastomoses
• They terminate without muscular branches
• They drain blood into the portal vein
• They supply only the kidneys

Q9. What is the anatomical relationship of the obturator artery to the superior pubic ramus in the corona mortis region?

• A vessel may cross the superior pubic ramus
• The artery always passes through the pubic symphysis
• The artery lies inside the femoral head
• The artery crosses the sacral promontory only

Q10. Which statement best integrates obturator artery anatomy?

• A femoral branch confined to the anterior thigh
• A carotid branch supplying the medial thigh
• A renal branch supplying the bladder
• An internal iliac branch passing through the obturator canal with important pelvic vascular variants