Blood supply of the stomach|| mcqs in medicine with answers || quiz for medical students(2021)|| digestive system important questions with answers and explanations|| set-1

 

Blood supply of stomach

• Arterial blood supply to stomach mainly comes from the celiac trunk

• Most parts of the stomach get blood supply from more than one artery

• Dual blood supply decreases the risk of hypoperfusion 

• Fundus of the stomach is supplied only by short gastric arteries, branches of the splenic artery. Therefore occlusion of the splenic artery may lead to ischemia/ hypoperfusion of the fundus.

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Figure-1 Arterial blood supply of stomach

    To remember all the arteries and their territories, I highly suggest you draw this diagram by yourself and label all the arteries. It is not easy to remember all the names for a long period of time but here are pro tips and tricks that you can use in order to make it last longer and solve multiple-choice questions as well:

• Draw a simple sketch of above figure-1(your figure does not need to be artistic)

• Label all the important arteries

• Recall the anatomy and surrounding structures of the stomach. How does it work? Let me explain.

• Spleen is present on the left side. Therefore, arteries that are going to those parts are named ‘left’. You could check number 9 in figure-1.

• Liver is present on the right side. So the branches that are coming off from the common hepatic artery, usually named  ‘right’ or by the specific structure they supply. You could check numbers 7 and 8 in figure-1. 

• Start from the aorta

• When you see the right gastroepiploic artery and you feel like you are lost, then start from the aorta.

• Abdominal aorta—>celiac trunk—>common hepatic artery(becaues it is on the right side)—>gastroduodenal artery—> right gastroepiploic artery

• Now you could say ‘it supplies greater curvature of stomach from right side’.

• The last tip is to try to visualize the whole figure rather than the individual artery.

Branches of the celiac trunk

    1. Left gastric artery

• Smallest branch
• Gives off esophageal and hepatic branches
• Runs within the lesser omentum
1. Supplies lesser curvature of stomach from the left

    2. Splenic artery

• Largest branch
• Gives off short gastric and left gastroepiploic arteries
• Short gastric supplies fundus of the stomach. Occlusion of the splenic artery may cause hypoperfusion of the fundus since it only gets blood from short gastric arteries.
• Left gastroepiploic supplies greater curvature of stomach from the right side.

    3. Common hepatic artery

• Gives off proper hepatic and gastroduodenal branches
• Proper hepatic artery
• 3 main branches:
• Right gastric artery- supplies lesser curvature of the stomach and  finally anastomoses with left gastric artery
• Left hepatic artery- supplies the liver
• Right hepatic artery- supplies the liver
• Gastroduodenal artery
• Gives off branches to supply duodenum
• Right gastroepiploic artery is an important branch that supplies greater curvature of the stomach and ultimately anastomoses with the left gastroepiploic artery.




This much information is more than sufficient to solve all the multiple-choice questions in this set.

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