What is Arc of Riolan?
The arc of Riolan, also known as the mesenteric meandering artery (of Moskowitz) or central anastomotic mesenteric artery, is an arterioarterial anastomosis between the superior and inferior mesenteric arteries.
Where is the colic artery?
The middle colic artery is a branch of the superior mesenteric artery that mostly supplies the transverse colon. It arises just below the pancreas. It passes inferiorly and anteriorly between the layers of the transverse mesocolon, and divides into left and right branches.
What blood vessels are involved in arc of Riolan?
The arc of Riolan (AOR), also known as the central anastomotic mesenteric artery or meandering mesenteric artery, is an inconstant artery which links the proximal superior mesenteric artery (SMA) or one of its principal branches to the proximal inferior mesenteric artery (IMA) or one of its primary branches [1].
What is a replaced hepatic artery?
Terminology. An accessory hepatic artery is one which arises from an anomalous origin and supplies a portion of the liver along with another artery. A replaced hepatic artery is one which arises from an anomalous origin and supplies a portion of the liver solely.
Which coronary artery is the Widowmaker?
The widow-maker is a massive heart attack that occurs when the left anterior descending artery (LAD) is totally or almost completely blocked. The critical blockage in the artery stops, usually a blood clot, stops all the blood flow to the left side of the heart, causing the heart to stop beating normally.
What is the function of the marginal artery?
It supplies the majority of the myocardium of the right ventricle of the heart. Some authors refer to this artery as the acute marginal artery, or the right marginal branch of right coronary artery. The right marginal artery gives off several collateral branches to supply the adjacent surfaces of the right ventricle.
How do you know if you have left colic?
Once diverging from the IMA, the left colic artery runs anterior to the left ureter, left internal spermatic vessels (males), and psoas major before branching into its ascending and descending segments. The ascending branch travels anteriorly to the left kidney before entering the mesentery of the transverse colon.
Where is celiac trunk?
The celiac trunk, also known as the celiac artery, is a short vessel that arises from the aorta and passes below the median arcuate ligament, just as the aorta enters the abdomen at the level of the T12 vertebra. The celiac trunk measures about 1.5cm to 2cm in length.
What kind of artery is the arc of Riolan?
Arc of Riolan. The arc of Riolan, also known as the mesenteric meandering artery (of Moskowitz) or central anastomotic mesenteric artery, is an arterioarterial anastomosis between the superior and inferior mesenteric arteries.
What is the arc of Riolan in gross anatomy?
Gross anatomy. It is classically described as connecting the middle colic branch of the SMA with the left colic branch of the IMA. It forms a short loop that runs close to the root of the mesentery. When present, the arc of Riolan is an important connection between the SMA and IMA in the setting of arterial occlusion or significant stenosis.
Who is Jean and what is Riolan anastomosis?
Jean, French anatomist and botanist, 1577-1657. Riolan anastomosis – the specific portion of the marginal artery of the colon connecting the middle and left colic arteries. Synonym (s): Riolan arc (3)
How is the arc of Riolan related to the mesentery?
It is classically described as connecting the middle colic branch of the SMA with the left colic branch of the IMA. It forms a short loop that runs close to the root of the mesentery. When present, the arc of Riolan is an important connection between the SMA and IMA in the setting of arterial occlusion or significant stenosis.