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DOH VI Radiography (DOH-VI) Practice Tests & Test Prep by Exam Edge - Review


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DOH Vascular-Interventional Radiography - Reviews


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See why our users from 154 countries love us for their exam prep! Including 110 reviews for the DOH VI Radiography exam.

Exam Edge is an industry leader in online test prep. We work with institutional partners to offer a wide array of practice tests that will help you prepare for your big exam. No matter how niche your field of interest might be, we're here to help you prepare for test day.

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DOH Vascular-Interventional Radiography - Test Reviews Sample Questions

In terms of the branches of the superior mesenteric artery (SMA), the right colic artery supplies which of the following?

Correct Answer:
ascending colon
the right colic artery, a branch of the superior mesenteric artery (sma), primarily supplies the ascending colon. to understand this better, it is important to explore the role and the distribution of the sma and its branches in detail.

the superior mesenteric artery (sma) is one of the major arteries supplying the intestines. it arises from the abdominal aorta and provides blood to a large portion of the midgut, which includes parts of the small intestine and the large intestine. the branches of the sma are crucial for providing the necessary blood supply to these regions and thus play a vital role in the digestive process.

the sma has several key branches, each serving different segments of the intestine: 1. **inferior pancreaticoduodenal artery**: supplies the head of the pancreas and the descending part of the duodenum. 2. **jejunal and ileal arteries**: these numerous small branches supply the jejunum and ileum, the middle sections of the small intestine. 3. **ileocolic artery**: supplies the terminal ileum (the last part of the small intestine), the cecum, and the appendix. 4. **right colic artery**: specifically supplies the ascending colon. it sometimes branches off directly from the sma but can also arise as a branch of the ileocolic artery. 5. **middle colic artery**: supplies the transverse colon.

among these branches, the right colic artery is primarily responsible for the vascularization of the ascending colon. this section of the colon runs upward from the cecum to the transverse colon at the hepatic (right colic) flexure. the right colic artery provides the blood supply necessary for this portion of the large intestine to function properly, facilitating the absorption of water and salts, and the processing of fecal matter.

in summary, the question specifically asks which part of the gastrointestinal tract the right colic artery supplies. the correct answer is the ascending colon. this understanding helps in clinical practices, particularly in surgeries involving the colon where precise knowledge of arterial supply is crucial to avoid complications.

Each of the following is a genetic etiology of thoracic aortic aneurysms EXCEPT:

Correct Answer:
takayasu


the question is identifying which of the listed conditions is not a genetic cause of thoracic aortic aneurysms. among the options given, takayasu arteritis is the correct answer because it is not genetically inherited but rather an inflammatory disease primarily affecting the large arteries.

takayasu arteritis is a rare form of vasculitis, inflammation of the blood vessels, which affects large vessels such as the aorta and its major branches. the cause of takayasu arteritis is not completely understood but is believed to be autoimmune in nature, with the immune system mistakenly attacking the body's own arteries. this results in wall thickening, narrowing, and scarring of the arteries, which can lead to severe complications, including aneurysms. however, it is not classified under genetic etiologies as its origin is not linked to genetic factors directly inherited from parents.

in contrast, other conditions listed such as marfan syndrome, loeys-dietz syndrome, and turner syndrome are indeed genetic disorders associated with thoracic aortic aneurysms. marfan syndrome is caused by mutations in the fbn1 gene, affecting connective tissue throughout the body, including the aortic wall, which can lead to aneurysm if weakened. loeys-dietz syndrome, similar to marfan syndrome, involves mutations in genes related to the body's connective tissue, particularly those encoding for the transforming growth factor-beta receptor. this mutation also predisposes individuals to aortic aneurysms. turner syndrome, although primarily a chromosomal disorder where females have a single x chromosome, is associated with congenital heart defects and can indirectly increase the risk of aortic aneurysm.

vascular ehlers-danlos syndrome, which is also mentioned in the context but not listed among the answer choices, is another genetic disorder caused by mutations in the col3a1 gene, which is responsible for the production of type iii collagen. this type of ehlers-danlos syndrome can lead to fragile blood vessels and is a direct genetic cause of vascular complications including thoracic aortic aneurysms.

thus, it is essential to distinguish between diseases like takayasu arteritis, which are autoimmune and non-genetic, from genuinely genetic disorders such as marfan syndrome, loeys-dietz syndrome, turner syndrome, and vascular ehlers-danlos syndrome, which all have well-established genetic etiologies contributing to thoracic aortic aneurysms.