Which artery originates from the external iliac artery and feeds peritesticular tissues, exhibiting high resistance (RI > 0.75)?

Which artery originates from the external iliac artery and feeds peritesticular tissues, exhibiting high resistance (RI > 0.75)?

• A. Cremasteric Artery
• B. Deferential Artery
• C. Centripetal Arteries
• D. Capsular Artery

Answer: (A)

The main idea here is understanding which artery supplies the tissues around the testis and how its Doppler waveform appears. The cremasteric artery arises from the inferior epigastric artery, a branch of the external iliac artery, and it specifically supplies the cremaster muscle and surrounding peritesticular tissues. Because it feeds muscular/peripheral tissue, it typically shows a high-resistance Doppler pattern with little diastolic flow, giving an RI greater than 0.75. This high-resistance profile helps distinguish it from vessels feeding the testis itself, which usually have lower resistance. The deferential artery, while also involved in peritesticular support, usually comes from the internal iliac system (often via the inferior vesical or other internal iliac branches), not from the external iliac, so it’s not the artery that originates from the external iliac. Capsular and centripetal arteries are intratesticular branches (arising from the testicular artery), and their flow is tied to testicular parenchyma rather than the peritesticular tissues; their origin and impedance characteristics differ from the high-resistance peritesticular vessel described here.

The main idea here is understanding which artery supplies the tissues around the testis and how its Doppler waveform appears. The cremasteric artery arises from the inferior epigastric artery, a branch of the external iliac artery, and it specifically supplies the cremaster muscle and surrounding peritesticular tissues. Because it feeds muscular/peripheral tissue, it typically shows a high-resistance Doppler pattern with little diastolic flow, giving an RI greater than 0.75. This high-resistance profile helps distinguish it from vessels feeding the testis itself, which usually have lower resistance.

The deferential artery, while also involved in peritesticular support, usually comes from the internal iliac system (often via the inferior vesical or other internal iliac branches), not from the external iliac, so it’s not the artery that originates from the external iliac.

Capsular and centripetal arteries are intratesticular branches (arising from the testicular artery), and their flow is tied to testicular parenchyma rather than the peritesticular tissues; their origin and impedance characteristics differ from the high-resistance peritesticular vessel described here.