Inferior Mesenteric Artery

The Inferior Mesenteric Artery is a branch of the Abdominal Aorta, which supplies the Hindgut. It exits at the L3 level at runs slightly lateral to the Abdominal Aorta.

Dr Aparajeya Shanker, MD

anatomy

Vascular Anatomy

Inferior Mesenteric Artery

  1. Origin:

    1. The Inferior Mesenteric Artery is an anterolateral branch of the Aorta

    2. Originates behind the first part of the Duodenum

    3. Below the Renal Arteries and Above the Common Iliac Bifurcation

  2. Branches

    1. Left Colic Artery

    2. Signoid Artery

    3. Superior Rectal Artery

    4. Marginal Artery of Drummond

  3. Supply

    1. The Inferior Mesenteric Artery supplies the embryological Hindgut:

      1. Distal Half of Transverse Colon

      2. Descending Colon

      3. Sigmoid Colon

      4. Superior Part of the Rectum (Above the Pectinate Line)

  4. Anastomoses

    1. Descending Branch of the Left Colic Artery and the First Branch of the Sigmoid Artery

    2. Marginal Artery of Drummond: Anastomoses between the Superior and Inferior Mesenteric Artery

      1. Middle Colic Artery (From SMA) and the Ascending Branch of the Left Colic Artery (From IMA)

Inferior Mesenteric Artery

  1. Origin:

    1. The Inferior Mesenteric Artery is an anterolateral branch of the Aorta

    2. Originates behind the first part of the Duodenum

    3. Below the Renal Arteries and Above the Common Iliac Bifurcation

  2. Branches

    1. Left Colic Artery

    2. Signoid Artery

    3. Superior Rectal Artery

    4. Marginal Artery of Drummond

  3. Supply

    1. The Inferior Mesenteric Artery supplies the embryological Hindgut:

      1. Distal Half of Transverse Colon

      2. Descending Colon

      3. Sigmoid Colon

      4. Superior Part of the Rectum (Above the Pectinate Line)

  4. Anastomoses

    1. Descending Branch of the Left Colic Artery and the First Branch of the Sigmoid Artery

    2. Marginal Artery of Drummond: Anastomoses between the Superior and Inferior Mesenteric Artery

      1. Middle Colic Artery (From SMA) and the Ascending Branch of the Left Colic Artery (From IMA)

Inferior Mesenteric Artery

  1. Origin:

    1. The Inferior Mesenteric Artery is an anterolateral branch of the Aorta

    2. Originates behind the first part of the Duodenum

    3. Below the Renal Arteries and Above the Common Iliac Bifurcation

  2. Branches

    1. Left Colic Artery

    2. Signoid Artery

    3. Superior Rectal Artery

    4. Marginal Artery of Drummond

  3. Supply

    1. The Inferior Mesenteric Artery supplies the embryological Hindgut:

      1. Distal Half of Transverse Colon

      2. Descending Colon

      3. Sigmoid Colon

      4. Superior Part of the Rectum (Above the Pectinate Line)

  4. Anastomoses

    1. Descending Branch of the Left Colic Artery and the First Branch of the Sigmoid Artery

    2. Marginal Artery of Drummond: Anastomoses between the Superior and Inferior Mesenteric Artery

      1. Middle Colic Artery (From SMA) and the Ascending Branch of the Left Colic Artery (From IMA)

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