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What is a fistula?

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What is a fistula?

(a) The connection between two arteries

(b) The connection between two veins

(c) The connection between two capillaries

(d) The connection between artery and vein

The question was asked in class test.

My doubt is from Intravenous Cannulae, Stomach Wash Tubes, Infusion Pumps v/s Syringe Pumps in section Gastroenterology of Clinical Science

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Correct choice is (d) The connection between artery and vein

Easy explanation: A fistula is also a disease but in this case, it is a connection between an artery and vein. It provides an access point for better withdrawal and injection of blood, saline etc. It is surgically created by creating a small longitudinal incision in an artery and vein facing each other and then they are joined together. This provides a better access point.

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