Vascular Surgery Practice Questions

Q: Which of the following is the most common cause of acute mesenteric ischemia?

Embolism. ***Embolism*** - **Embolic occlusion** (typically from the heart, e.g., atrial fibrillation) accounts for a significant majority of acute mesenteric ischemia cases. - This typically leads to sudden onset of severe abdominal pain with minimal physical findings initially. *Thrombosis* - **Arterial thrombosis** of the mesenteric vessels is another cause but is less frequent than embolism in acute settings. - It often occurs in the context of pre-existing **atherosclerotic disease** and can present with a more gradual onset of symptoms. *NOMI* - **Nonocclusive Mesenteric Ischemia (NOMI)** is caused by severe vasoconstriction and hypoperfusion, not a physical blockage. - It is often seen in critically ill patients with conditions like **shock**, sepsis, or heart failure. *Venous thrombosis* - **Mesenteric venous thrombosis** is a less common cause of acute mesenteric ischemia compared to arterial causes. - It is often associated with hypercoagulable states and can present with more insidious abdominal pain and bowel wall edema.

Q: Which of the following is not true regarding the surgical treatment of varicose veins?

Sclerotherapy is curative. ***Sclerotherapy is curative*** - **Sclerotherapy** is a procedure where a solution is injected into varicose veins to cause them to scar and collapse, but it is typically not considered **curative** on its own, especially for larger or recurrent veins. - While effective for smaller veins and spider veins, its role is often **palliative** or adjunctive, and it may require multiple sessions or be combined with other treatments to achieve long-term success. - Modern guidelines prefer endovenous ablation techniques (radiofrequency or laser) for definitive treatment of great saphenous vein incompetence. *High ligation is commonly performed* - **High ligation**, involving the surgical tie-off of the sapheno-femoral junction (SFJ), is a common component of surgical treatment for **varicose veins** to prevent reflux from the deep venous system into the superficial system. - It aims to eliminate a primary source of **venous hypertension** in the superficial veins and is often combined with stripping of the great saphenous vein. *Compression stockings are recommended after surgery* - **Compression stockings** are routinely recommended after surgical treatment of varicose veins to minimize **postoperative swelling**, reduce pain, and improve venous return. - They also play a role in preventing complications such as **thrombosis** and promoting better long-term outcomes by maintaining vein compression during healing. *Phlebectomy is used* - **Ambulatory phlebectomy** is a surgical technique used to remove varicose veins through small incisions, particularly for superficial, tortuous veins that are not easily treated by other methods. - It is often performed in conjunction with **high ligation** and stripping or as a standalone procedure for localized varicose segments.

Q: A 50-year-old smoker with a history of hypertension presents with a sudden onset of severe back pain. Imaging suggests a 5 cm infrarenal abdominal aortic aneurysm with signs of rupture. What is the immediate management?

Perform open surgical repair immediately. ***Perform open surgical repair immediately*** - A **ruptured abdominal aortic aneurysm (AAA)** is a surgical emergency requiring immediate intervention to control bleeding and prevent exsanguination. - **Open surgical repair** remains the definitive treatment when EVAR facilities are unavailable, anatomy is unsuitable, or the patient is severely hemodynamically unstable requiring immediate laparotomy. - In many emergency settings, particularly where endovascular capabilities are limited, **open repair is the most rapidly available life-saving intervention**. *Manage conservatively with blood pressure control* - **Conservative management** is appropriate for asymptomatic, unruptured AAAs, especially those smaller than 5.5 cm, as it aims to reduce rupture risk. - In a ruptured AAA, **medical management alone is insufficient** to stop the ongoing hemorrhage and will likely lead to rapid demise. *Attempt endovascular aneurysm repair (EVAR)* - **EVAR is increasingly preferred** for ruptured AAA when anatomically suitable and available, with evidence from multiple trials (IMPROVE, AJAX) showing comparable or better outcomes than open repair. - However, EVAR requires specialized equipment, anatomical suitability (adequate neck length, appropriate iliac access), and may not be immediately available in all emergency settings. - In the acute setting with limited resources or unfavorable anatomy, **open repair remains the standard**, making this option context-dependent rather than universally applicable. *Administer thrombolytic therapy* - **Thrombolytic therapy** is used to dissolve blood clots, typically in conditions like acute myocardial infarction or ischemic stroke. - It is **absolutely contraindicated in a ruptured aneurysm** as it would worsen bleeding, accelerate hemorrhage, and be rapidly fatal.

Q: Which artery is commonly used for coronary artery bypass grafting (CABG)?

Internal thoracic artery. **Internal thoracic artery** - The **internal thoracic artery** (also known as the internal mammary artery) is the **most preferred conduit for CABG** due to its excellent long-term patency rates. - Its resistance to atherosclerosis and good size matching with coronary arteries make it ideal for bypassing blocked coronary vessels. *Radial artery* - The **radial artery** is a common alternative conduit, particularly for multi-vessel bypass. - However, it has a **higher rate of spasm** compared to the internal thoracic artery, which can affect graft patency. *Gastroepiploic artery* - The **gastroepiploic artery** is primarily used in cases where other conduits (internal thoracic, radial, saphenous vein) are unavailable or unsuitable. - Its use is **more technically challenging** and typically reserved for re-do CABG or patients with limited options. *Femoral artery* - The **femoral artery** is a large artery in the leg and is **not suitable for CABG**. - It is typically used for procedures related to peripheral arterial disease, not for direct bypass of coronary arteries.

Q: In a patient with an abdominal aortic aneurysm, which symptom would indicate an imminent risk of rupture?

Sudden, severe abdominal pain. ***Sudden, severe abdominal pain*** - This symptom, particularly when acute and intense, often signifies a **rapid expansion** or impending rupture of the abdominal aortic aneurysm (AAA). - It indicates that the aortic wall is under extreme stress, and immediate medical intervention is critical to prevent a catastrophic rupture. *Back pain* - While back pain can be a symptom of an expanding AAA, it is often a more **chronic or gradual symptom** and does not necessarily indicate an *imminent* rupture. - Many conditions can cause back pain, and it is less specific for an acute, life-threatening event compared to sudden, severe abdominal pain. *Pulsatile abdominal mass* - A palpable pulsatile abdominal mass is a **classic sign** of an AAA, but its presence alone does not indicate imminent rupture. - This finding suggests the presence of an aneurysm but does not necessarily denote acute instability or a heightened risk of rupture *at that exact moment*. *Constipation* - Constipation is a common gastrointestinal symptom that is **unrelated to the pathology** or acute complications of an abdominal aortic aneurysm. - It does not suggest any increased risk of aneurysm rupture and should not be considered an indicator of an imminent vascular event.

Q: Which intervention is most appropriate for a patient with symptomatic chronic mesenteric ischemia?

Endovascular angioplasty with stenting. ***Endovascular angioplasty with stenting*** - This intervention directly addresses the underlying cause of **chronic mesenteric ischemia**, which is typically **stenosis** or occlusion of the mesenteric arteries. - It is a **minimally invasive** procedure that can restore adequate blood flow to the bowel, alleviating symptoms such as **postprandial abdominal pain** and **weight loss**. *Diet modification* - While important for managing symptoms in many gastrointestinal disorders, **diet modification** alone does not address the underlying **vascular insufficiency** in chronic mesenteric ischemia. - It may temporarily reduce symptoms by decreasing the metabolic demand on the ischemic bowel, but it cannot reverse the disease progression or prevent complications like **bowel infarction**. *Administration of vasodilators* - **Vasodilators** may offer some symptomatic relief by increasing blood flow to existing vessels, but they often have limited efficacy because the primary issue is **fixed arterial stenosis** rather than vasospasm. - They do not address the structural blockage of the mesenteric arteries, and their use is generally reserved for acute settings or when revascularization is not an option. *Laparoscopic bowel resection* - **Laparoscopic bowel resection** is a surgical procedure to remove segments of the bowel. It is indicated for complications such as **bowel infarction** or obstruction, not for the primary treatment of chronic mesenteric ischemia itself. - This intervention is a treatment for the consequences of severe, unmanaged ischemia, rather than a solution for the underlying **vascular insufficiency**.

Q: A 75-year-old man presents with a pulsatile abdominal mass and back pain. Ultrasound confirms an abdominal aortic aneurysm measuring 6 cm. What is the recommended management?

Endovascular aneurysm repair. ***Endovascular aneurysm repair (EVAR)*** - A **6 cm AAA with back pain** suggests **impending rupture** and requires **urgent intervention**. - EVAR is generally preferred for large AAAs in elderly patients when **anatomically suitable**, offering **lower perioperative mortality** (1-2% vs 4-5% for open repair) and faster recovery. - The **minimally invasive approach** reduces physiological stress, making it ideal for a 75-year-old patient. - **Important:** If hemodynamically unstable or anatomy is unfavorable for EVAR, open repair becomes necessary. *Open surgical repair* - Remains the **gold standard** for ruptured AAA when EVAR is not feasible (unfavorable anatomy, lack of expertise, or hemodynamic instability requiring immediate control). - Involves **higher perioperative morbidity** (cardiac events, bleeding, infection) and longer recovery, especially in elderly patients. - However, it is a valid and sometimes necessary option for symptomatic AAAs. *Monitoring with serial ultrasounds* - Appropriate only for **asymptomatic AAAs 10-20%), making surveillance inappropriate. - Immediate intervention is required to prevent fatal rupture. *Lifestyle modification* - Important for **preventing aneurysm growth** (smoking cessation, BP control, statin therapy) in small asymptomatic AAAs. - **Cannot address** the immediate rupture risk of a large, symptomatic 6 cm AAA. - Should be adjunctive to surgical repair, not a replacement for it.

Q: A 62-year-old male with a history of hypertension, diabetes mellitus, and tobacco use presents with acute, severe back pain. Examination reveals a blood pressure of 160/90 mmHg, a heart rate of 110 bpm, and cool extremities. Ultrasound shows an abdominal aorta greater than 6 cm and free fluid. Analyze and weigh the treatment options.

Endovascular repair. ***Endovascular repair*** - This patient presents with a **ruptured abdominal aortic aneurysm (AAA)**, indicated by acute severe back pain, hemodynamic instability (high heart rate, cool extremities), and a large aorta with free fluid on ultrasound. - **Endovascular repair (EVAR)** is the preferred treatment for ruptured AAAs when the patient is hemodynamically stable or marginally unstable and the anatomy is suitable, due to its minimally invasive nature and lower periprocedural morbidity and mortality compared to open repair. - This patient's blood pressure of 160/90 mmHg suggests relative hemodynamic stability despite tachycardia, making EVAR the optimal choice if anatomically feasible. *Open surgical repair* - While open surgical repair is a definitive treatment for AAA rupture, it carries higher morbidity and mortality compared to EVAR. - It is typically used when EVAR is not anatomically suitable (unfavorable neck anatomy, inadequate access vessels) or when EVAR is not immediately available. - In profoundly unstable patients requiring emergent intervention, open repair may be necessary if EVAR cannot be performed quickly enough, though outcomes are generally worse than EVAR when both options are available. *IV beta-blockers, serial imaging* - This approach might be considered for an **unruptured, stable AAA** to control blood pressure and heart rate and monitor growth, but it is entirely inappropriate for a ruptured AAA. - A ruptured AAA is a surgical emergency requiring immediate intervention, and conservative management would lead to rapid deterioration and death. *Fluid resuscitation and observation* - Fluid resuscitation is crucial for managing hypovolemic shock in a ruptured AAA, but it is only a temporizing measure. - **Observation** is never appropriate for a ruptured AAA; immediate surgical or endovascular repair is necessary to stop the bleeding and prevent further hemodynamic collapse.

Question 1

Which of the following is the most common cause of acute mesenteric ischemia?

Accepted Answer

Embolism

Answer

Thrombosis

Answer

NOMI

Answer

Venous thrombosis

Question 2

Which of the following is not true regarding the surgical treatment of varicose veins?

Accepted Answer

Sclerotherapy is curative

Answer

High ligation is commonly performed

Answer

Compression stockings are recommended after surgery

Answer

Phlebectomy is used

Question 3

A 70-year-old woman presents with chronic venous insufficiency and varicose veins. Which is the most appropriate first-line interventional approach for treating her condition?

Accepted Answer

Endovenous laser therapy

Answer

Saphenous vein stripping

Answer

Radiofrequency ablation

Answer

Surgical intervention is not required.

Question 4

A 50-year-old smoker with a history of hypertension presents with a sudden onset of severe back pain. Imaging suggests a 5 cm infrarenal abdominal aortic aneurysm with signs of rupture. What is the immediate management?

Accepted Answer

Perform open surgical repair immediately

Answer

Manage conservatively with blood pressure control

Answer

Attempt endovascular aneurysm repair (EVAR)

Answer

Administer thrombolytic therapy

Question 5

Which artery is commonly used for coronary artery bypass grafting (CABG)?

Accepted Answer

Internal thoracic artery

Answer

Radial artery

Answer

Gastroepiploic artery

Answer

Femoral artery

Question 6

In a patient with an abdominal aortic aneurysm, which symptom would indicate an imminent risk of rupture?

Accepted Answer

Sudden, severe abdominal pain

Answer

Back pain

Answer

Pulsatile abdominal mass

Answer

Constipation

Question 7

Which intervention is most appropriate for a patient with symptomatic chronic mesenteric ischemia?

Accepted Answer

Endovascular angioplasty with stenting

Answer

Diet modification

Answer

Administration of vasodilators

Answer

Laparoscopic bowel resection

Question 8

A 75-year-old man presents with a pulsatile abdominal mass and back pain. Ultrasound confirms an abdominal aortic aneurysm measuring 6 cm. What is the recommended management?

Accepted Answer

Endovascular aneurysm repair

Answer

Monitoring with serial ultrasounds

Answer

Lifestyle modification

Answer

Open surgical repair

Question 9

A 58-year-old male with a history of hypertension and smoking presents with sudden severe back pain and hypotension. A CT scan reveals a 7 cm ruptured abdominal aortic aneurysm (AAA). What are the key factors in deciding whether to proceed with endovascular aneurysm repair (EVAR) or open surgical repair?

Accepted Answer

Patient's hemodynamic stability, anatomy of the aneurysm, and access to EVAR equipment

Answer

Patient's hemodynamic stability and anatomy of the aneurysm

Answer

Access to EVAR equipment and patient's age

Answer

Surgeon's experience with EVAR procedures

Question 10

A 62-year-old male with a history of hypertension, diabetes mellitus, and tobacco use presents with acute, severe back pain. Examination reveals a blood pressure of 160/90 mmHg, a heart rate of 110 bpm, and cool extremities. Ultrasound shows an abdominal aorta greater than 6 cm and free fluid. Analyze and weigh the treatment options.

Accepted Answer

Endovascular repair

Answer

IV beta-blockers, serial imaging

Answer

Fluid resuscitation and observation

Answer

Open surgical repair

Vascular Surgery — MCQs

Vascular Surgery — MCQs

On this page

Practice by Chapter

Want unlimited practice?