Vascular Surgery Practice Questions

Q: A 30-year-old man presents with cramping gluteal pain after walking 500m. Which vascular condition is most likely involved?

Aortoiliac arterial disease. ***Aortoiliac arterial disease*** - **Cramping gluteal pain** (claudication) is characteristic of **aortoiliac disease** due to insufficient blood flow to the gluteal muscles [1]. - The disease typically involves the **aorta** and/or the **iliac arteries**, which supply blood to the pelvis and lower limbs [1]. *Superficial femoral artery disease* - This condition primarily causes claudication in the **calf muscles**, not typically the gluteal region [1]. - The pain would be felt lower down the leg, corresponding to the muscle groups supplied by the **superficial femoral artery** [1]. *Popliteal artery disease* - **Popliteal artery disease** causes claudication in the **calf and foot** due to reduced blood flow to these distal areas [1]. - It would not typically present with gluteal pain, as the popliteal artery is located behind the knee. *No vascular involvement* - The presence of **cramping pain after exertion**, specifically claudication, strongly indicates significant vascular compromise [1]. - This symptom pattern is classic for **peripheral arterial disease**, ruling out no vascular involvement [1].

Q: Claudication due to superficial femoral artery occlusion is primarily seen in

Calf pain during exercise. ***Calf pain during exercise*** - **Claudication** due to superficial femoral artery occlusion (peripheral artery disease) typically manifests as pain in the **calf muscles** during exercise. - This is because the **superficial femoral artery** supplies the popliteal artery and subsequently the calf, and its occlusion leads to insufficient blood flow to these muscles during increased demand. *Thigh pain during exercise* - **Thigh pain** during exercise usually indicates stenosis or occlusion higher up in the arterial tree, such as the **common femoral** or **iliac arteries**. - While related to peripheral artery disease, it is not the primary symptom of superficial femoral artery occlusion. *Buttock pain during exercise* - **Buttock claudication** is characteristic of significant stenosis or occlusion in the **aortoiliac segment**, affecting blood supply to the gluteal muscles. - This is distinct from superficial femoral artery occlusion, which affects distal circulation. *Foot pain during exercise* - **Foot pain** during exercise can indicate more severe, distal occlusive disease affecting the **tibial** or **pedal arteries**. - While peripheral artery disease can affect the foot, classic claudication from superficial femoral artery occlusion is predominantly felt in the calf.

Q: In which condition does the Ankle-Brachial Pressure Index (ABPI) increase artificially?

Arteriosclerosis calcified arteries. ***Arteriosclerosis calcified arteries*** - **Arterial calcification** makes the vessels rigid and **non-compressible**, leading to falsely elevated blood pressure readings in the ankle. - This results in an **artificially high ABPI** (>1.3), masking the true extent of peripheral artery disease or even suggesting absence of disease [2]. *Ischemic ulcers* - **Ischemic ulcers** are a consequence of severe peripheral artery disease, which typically causes a **decreased ABPI** (<0.9) [2]. - The reduced blood flow cannot artificially increase the ABPI; rather, it indicates severe circulatory compromise. *Intermittent claudication* - **Intermittent claudication** is a symptom of peripheral artery disease, where the ABPI is usually **reduced during exercise** or **at rest** (<0.9) [1]. - This condition is characterized by arterial narrowing, not by stiffening that artificially inflates pressure readings. *DVT* - **Deep vein thrombosis (DVT)** primarily affects the venous system and **does not directly influence arterial pressure** measurements used for ABPI [2]. - While DVT can cause leg pain and swelling, it does not cause an artificial increase in arterial pressure readings in the ankle.

Q: What is the cutoff for surgery in an abdominal aortic aneurysm in asymptomatic patients?

5.5cm. ***5.5cm*** - For **asymptomatic patients**, an abdominal aortic aneurysm (AAA) measuring **5.5 cm or larger** is generally considered the threshold for surgical repair. - This cutoff is based on studies showing that the risk of rupture significantly increases beyond this size, outweighing the risks of elective repair. *6.5cm* - While a 6.5 cm AAA would certainly warrant repair, the **standard cutoff for elective repair is 5.5 cm** to prevent rupture. - Delaying repair until this size would expose the patient to an unnecessarily higher risk of complications. *7.5cm* - An aneurysm of 7.5 cm carries a **very high risk of rupture**, making emergency repair almost inevitable if it is not addressed proactively. - This size is well beyond the recommended threshold for elective intervention. *8.5cm* - An 8.5 cm AAA has an **extremely high and imminent risk of rupture**, which would be a life-threatening event. - Surgical intervention would be considered urgent in this scenario, as it is far past the ideal window for elective repair.

Q: Which of the following is the preferred graft material for femoropopliteal bypass?

Reversed saphenous. ***Reversed saphenous*** - The **autologous reversed saphenous vein** is considered the **gold standard** for femoropopliteal bypass due to its superior patency rates and resistance to infection. - The vein's valves are bypassed by reversing its orientation, ensuring unidirectional blood flow. *Dacron* - **Dacron (polyethylene terephthalate)** grafts are synthetic and commonly used for large-diameter arterial bypasses, such as in the aorta, but have **inferior patency in infrainguinal bypasses** compared to autologous vein. - **Higher rates of thrombosis and infection** are observed with Dacron in smaller leg vessels due to compliance mismatch and increased anastomotic intimal hyperplasia. *PTFE* - **Polytetrafluoroethylene (PTFE)** grafts are synthetic and are an option when autologous vein is unavailable, particularly for above-knee femoropopliteal bypasses. - However, PTFE generally has **lower long-term patency rates** and a higher risk of complications like **graft thrombosis and infection** compared to autologous vein grafts. *None of the options* - This option is incorrect because the **reversed saphenous vein** is indeed a preferred and highly effective graft material for femoropopliteal bypass. - The clinical evidence strongly supports its use over synthetic alternatives when available.

Q: Claudication due to femoropopliteal incompetence is primarily seen in

Calf. ***Calf*** - **Femoropopliteal incompetence** refers to insufficiency in the superficial femoral and popliteal arteries. Blockage in these arteries typically results in **claudication** symptoms downstream from the obstruction. - The **calf muscles** receive their blood supply via these arteries and are therefore the primary site of pain due to inadequate blood flow during exertion, manifesting as claudication. *Thigh* - Claudication in the **thigh** is usually associated with more proximal arterial obstructions in the **aortoiliac system** or common femoral artery. - While thigh muscles are located upstream from the calf, pain would indicate a blockage higher up than the femoropopliteal segment. *Buttocks* - **Buttock claudication** points to very proximal arterial disease, specifically involving the **internal iliac arteries** or the distal aorta (**Leriche syndrome**). - This is even further upstream than the femoropopliteal arteries and would involve more significant and widespread circulatory compromise. *Feet* - While the **feet** can experience pain due to arterial insufficiency, particularly with severe disease or at rest, isolated foot claudication is less common. - **Claudication** specifically points to muscle ischemia during activity, and the robust musculature of the calf makes it the primary site when femoropopliteal arteries are involved.

Q: The size threshold at which the risk of rupture of an abdominal aortic aneurysm significantly increases is:

5.5 cm. ***5.5 cm*** - An abdominal aortic aneurysm (AAA) 5.5 cm or larger is typically the threshold for considering **elective surgical repair** due to significantly increased **rupture risk**. - For aneurysms smaller than this, the risk of surgery often outweighs the risk of rupture, making watchful waiting with surveillance more appropriate. *6 cm* - While a 6 cm AAA certainly has a very high risk of rupture, the generally accepted guideline for intervention begins at **5.5 cm** for most patients. - Delaying intervention until 6 cm could unnecessarily expose the patient to a higher risk of rupture. *6.5 cm* - An AAA of 6.5 cm carries an extremely high risk of rupture, and intervention would be strongly indicated. - This size is well past the standard **5.5 cm threshold** recommended for elective repair. *7 cm* - A 7 cm AAA is associated with a **critical and very high risk of rupture**, making immediate intervention imperative. - This size is significantly beyond the established guideline for considering elective repair, which is 5.5 cm.

Q: May-Thurner or Cockett syndrome involves:

Left iliac vein compression. ***Correct: Left iliac vein compression*** - May-Thurner syndrome, also known as Cockett syndrome, specifically describes the **compression of the left common iliac vein** by the overlying right common iliac artery. - This anatomical compression can lead to **venous outflow obstruction**, increasing the risk of deep vein thrombosis (DVT) in the left leg. *Incorrect: Internal iliac artery obstruction* - This condition involves an artery and is unrelated to May-Thurner syndrome, which is a **venous compression disorder**. - Obstruction of the internal iliac artery would typically cause symptoms of **pelvic ischemia** or erectile dysfunction, not venous DVT. *Incorrect: Common iliac artery obstruction* - Obstruction of the common iliac artery is an **arterial occlusion** that would cause peripheral artery disease symptoms in the leg, such as claudication or rest pain. - It does not involve the compression of a vein by an artery, which is characteristic of May-Thurner syndrome. *Incorrect: Internal iliac vein obstruction* - While this is a venous issue, May-Thurner syndrome specifically involves the **common iliac vein**, not the internal iliac vein. - Obstruction of the internal iliac vein would typically present with symptoms related to pelvic venous congestion, distinct from the left lower extremity DVT associated with May-Thurner syndrome.

Q: The most common cause of acquired AV fistula is:

Penetrating trauma. ***Penetrating trauma*** - **Penetrating trauma** is the most common cause of **acquired AV fistulas** due to direct injury to adjacent artery and vein. - This type of injury can result from causes like **gunshot wounds, stab wounds, or iatrogenic procedures** (e.g., catheterizations). *Bacterial infection* - While infections can cause vascular damage, they are **not the most common cause** of acquired AV fistulas. - Infections like **endocarditis** or localized abscesses can lead to vascular erosion, but this is less frequent than trauma. *Fungal infection* - **Fungal infections** are a much rarer cause of vascular damage leading to AV fistulas compared to bacterial infections or trauma. - They typically occur in immunocompromised individuals or in specific settings, not as a common cause of acquired AV fistulas. *Blunt trauma* - **Blunt trauma** can cause vascular injury, but it is **less likely to directly create an AV fistula** compared to penetrating trauma. - Blunt force is more commonly associated with vessel rupture, dissection, or pseudoaneurysm formation, rather than a direct connection between an artery and a vein.

Question 1

A 68-year-old asymptomatic male is found to have an abdominal aortic aneurysm (AAA) measuring 4.5 cm on routine ultrasound screening. What is the most appropriate management?

Accepted Answer

Monitor regularly and consider surgery if size reaches 55mm or symptomatic

Answer

Ultrasound monitoring until size exceeds 70mm

Answer

No treatment unless symptomatic

Answer

Immediate surgical repair for all diagnosed aneurysms regardless of size

Question 2

A 30-year-old man presents with cramping gluteal pain after walking 500m. Which vascular condition is most likely involved?

Accepted Answer

Aortoiliac arterial disease

Answer

Superficial femoral artery disease

Answer

Popliteal artery disease

Answer

No vascular involvement

Question 3

Claudication due to superficial femoral artery occlusion is primarily seen in

Accepted Answer

Calf pain during exercise

Answer

Thigh pain during exercise

Answer

Buttock pain during exercise

Answer

Foot pain during exercise

Question 4

In which condition does the Ankle-Brachial Pressure Index (ABPI) increase artificially?

Accepted Answer

Arteriosclerosis calcified arteries

Answer

Ischemic ulcers

Answer

Intermittent claudication

Answer

DVT

Question 5

What is the cutoff for surgery in an abdominal aortic aneurysm in asymptomatic patients?

Accepted Answer

5.5cm

Answer

6.5cm

Answer

7.5cm

Answer

8.5cm

Question 6

Which of the following is the preferred graft material for femoropopliteal bypass?

Accepted Answer

Reversed saphenous

Answer

PTFE

Answer

Dacron

Answer

None of the options

Question 7

Claudication due to femoropopliteal incompetence is primarily seen in

Accepted Answer

Calf

Answer

Thigh

Answer

Buttocks

Answer

Feet

Question 8

The size threshold at which the risk of rupture of an abdominal aortic aneurysm significantly increases is:

Accepted Answer

5.5 cm

Answer

6 cm

Answer

6.5 cm

Answer

7 cm

Question 9

May-Thurner or Cockett syndrome involves:

Accepted Answer

Left iliac vein compression

Answer

Internal iliac artery obstruction

Answer

Common iliac artery obstruction

Answer

Internal iliac vein obstruction

Question 10

The most common cause of acquired AV fistula is:

Accepted Answer

Penetrating trauma

Answer

Bacterial infection

Answer

Fungal infection

Answer

Blunt trauma

Vascular Surgery — MCQs

Vascular Surgery — MCQs

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