Vascular Access Exam
Question 1. Which vessel layer is primarily responsible for controlling vessel diameter and blood flow regulation?
- Tunica intima
- Tunica media
- Tunica adventitia
- Endothelium
Answer: B
Explanation: The tunica media contains smooth muscle fibers that
regulate vessel diameter and blood flow, making it the primary layer responsible for vasoconstriction and vasodilation.
Question 2. What is the main function of the lymphatic system in relation to vascular access?
- Oxygen transport
- Immune response and fluid balance
- Blood pressure regulation
- Hormone delivery
Answer: B 1 / 4
Vascular Access Exam
Explanation: The lymphatic system helps maintain fluid balance and
immune surveillance, which are crucial in preventing infections associated with vascular access.
Question 3. Which of the following best describes microcirculation?
- Blood flow through large arteries
- Blood flow through capillary networks in tissues
- Blood flow in the vena cava
- Blood flow in the heart chambers
Answer: B
Explanation: Microcirculation involves blood flow through capillaries,
arterioles, and venules, essential for tissue perfusion and healing at access sites.
Question 4. Which neurovascular bundle is most relevant during vascular access procedures in the wrist?
- Median nerve, brachial artery, and median basilic vein
- Radial nerve, radial artery, and cephalic vein
- Median nerve, radial artery, and cephalic vein 2 / 4
Vascular Access Exam
- Ulnar nerve, ulnar artery, and basilic vein
Answer: C
Explanation: The median nerve, radial artery, and cephalic vein are
key neurovascular structures in the wrist area, and care must be taken to avoid nerve injury during access.
Question 5. How do age-related changes affect vascular access options in elderly patients?
- Increased vessel elasticity and size
- Decreased vessel compliance and vessel wall calcification
- Increased vessel diameter and blood flow
- No significant changes
Answer: B
Explanation: Aging causes decreased vessel compliance, wall
calcification, and narrowing, which can complicate access creation and maintenance.
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Vascular Access Exam
Question 6. Which hemodynamic parameter primarily reflects resistance to blood flow?
- Blood pressure
- Cardiac output
- Vascular resistance
- Blood viscosity
Answer: C
Explanation: Vascular resistance directly influences blood flow
resistance; increased resistance can reduce flow in vessels or grafts.
Question 7. Which factor most significantly affects blood flow in a native arteriovenous fistula?
- Blood viscosity
- Vessel diameter and patency
- Heart rate
- Blood pH
Answer: B
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