Right hepatic artery
Updates to Article Attributes
The right hepatic artery (RHA) is formed when the proper hepatic artery (PHA) bifurcates. The hepatic arteries provide 25% of the blood supply and 50% of the oxygen supply to the liver.
Gross anatomy
The PHA bifurcates into the leftright and rightleft hepatic arteryarteries on reaching the porta hepatis. These are end arteries and supply the leftright and the rightleft halves of the liver respectively. The RHA passes upwards and turns to the right, crossing behind the common hepatic duct to enter Calots triangle 1. It usually gives off the cystic artery within Calot’s triangle 1,2 then turns upwards to enter the right lobe of the liver.
Within the liver it divides into:
- anterior segmental branch which supplies
segmentsegments V and VIII. Thisand usually supplies a branch to segment I 1. - posterior segmental branch which supplies
segmentsegments VI and VII 1.
Moynihan’s lump, also known as caterpillar lump, is the descriptive term when the RHA forms a sinuous tortuosity occupying the majority of Calots triangle, and may be at risk of damage during a cholecystectomy. It often lies in close proximity with the gallbladder neck.
Variant anatomy
The RHA can be aberrant in one-third of cases, and is known to originate from the:
-<p>The<strong> right hepatic artery</strong> (RHA) is formed when the <a href="/articles/hepatic-artery-proper">proper hepatic artery</a> (PHA) bifurcates. The hepatic arteries provide 25% of the blood supply and 50% of the oxygen supply to the liver.</p><h4>Gross anatomy</h4><p>The PHA bifurcates into the left and right hepatic artery on reaching the porta hepatis. These are end arteries and supply the left and the right halves of the liver respectively. The RHA passes upwards and turns to the right, crossing behind the <a href="/articles/common-hepatic-duct">common hepatic duct</a> to enter <a href="/articles/calot-triangle">Calots triangle</a> <sup>1</sup>. It usually gives off the <a href="/articles/cystic-artery">cystic artery</a> within Calot’s triangle <sup>1,2</sup> then turns upwards to enter the right lobe of the liver.</p><p>Within the liver it divides into:</p><ul>-<li>anterior segmental branch which supplies segment V and VIII. This usually supplies a branch to segment I <sup>1.</sup><!--[if supportFields]><span- +<p>The<strong> right hepatic artery</strong> (RHA) is formed when the <a href="/articles/hepatic-artery-proper">proper hepatic artery</a> (PHA) bifurcates. The hepatic arteries provide 25% of the blood supply and 50% of the oxygen supply to the liver.</p><h4>Gross anatomy</h4><p>The PHA bifurcates into the right and <a title="Left hepatic artery" href="/articles/left-hepatic-artery">left hepatic arteries</a> on reaching the <a title="Porta hepatis" href="/articles/porta-hepatis">porta hepatis</a>. These are end arteries and supply the right and left halves of the liver respectively. The RHA passes upwards and turns to the right, crossing behind the <a href="/articles/common-hepatic-duct">common hepatic duct</a> to enter <a href="/articles/calot-triangle">Calots triangle</a> <sup>1</sup>. It usually gives off the <a href="/articles/cystic-artery">cystic artery</a> within Calot’s triangle <sup>1,2</sup> then turns upwards to enter the right lobe of the liver.</p><p>Within the liver it divides into:</p><ul>
- +<li>anterior segmental branch which supplies segments V and VIII and usually supplies a branch to segment I <sup>1.</sup><!--[if supportFields]><span
-<li>posterior segmental branch which supplies segment VI and VII <sup>1</sup>.</li>- +<li>posterior segmental branch which supplies segments VI and VII <sup>1</sup>.</li>
-<li>superior mesenteric artery</li>-<li>gastroduodenal artery</li>-<li>right gastric artery</li>-<li>celiac trunk</li>- +<li><a title="Superior mesenteric artery" href="/articles/superior-mesenteric-artery">superior mesenteric artery</a></li>
- +<li><a title="Gastroduodenal artery" href="/articles/gastroduodenal-artery">gastroduodenal artery</a></li>
- +<li><a title="right gastric artery" href="/articles/right-gastric-artery">right gastric artery</a></li>
- +<li><a title="Celiac trunk" href="/articles/coeliac-artery">celiac trunk</a></li>
Systems changed:
- Hepatobiliary
- Vascular
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