Vascular Surgery — MCQs

Vascular Surgery Indian Medical PG Practice Questions and MCQs

Question 521: Which of the following conditions is primarily treated by sympathectomy?

A. Buerger's disease
B. Acrocyanosis
C. Hyperhidrosis (Correct Answer)
D. Raynaud's disease

Explanation: ***Hyperhidrosis*** - **Sympathectomy** (especially thoracic sympathectomy) is a definitive treatment for severe, localized **hyperhidrosis** (excessive sweating) that has not responded to conservative therapies. - The procedure aims to interrupt the sympathetic nerves responsible for stimulating sweat glands, commonly in the palms, soles, or axillae. *Buerger's disease* - While **sympathectomy** was historically used, its efficacy in **Buerger's disease** (thromboangiitis obliterans) is questionable and largely replaced by smoking cessation and other treatments for limb salvage. - The primary issue is **inflammation** and **thrombosis** of small and medium-sized arteries and veins, not primarily sympathetic overactivity. *Acrocyanosis* - **Acrocyanosis** is a benign condition characterized by persistent, painless, blue discoloration of the extremities due to vasospasm of small skin arteries and arterioles. - Treatment is generally reassurance and avoidance of cold, and **sympathectomy** is rarely, if ever, indicated or effective due to the non-progressive and cosmetic nature of the condition. *Raynaud's disease* - **Raynaud's disease** is a vasospastic disorder, but **sympathectomy** is usually reserved for severe cases with impending tissue loss or critical ischemia that fail medical management. - Medical management with calcium channel blockers is the primary treatment, as the condition involves episodic vasospasm of digital arteries.

Question 522: Which of the following is not a direct cause of varicose veins?

A. Superficial venous thrombosis (Correct Answer)
B. Deep venous thrombosis
C. Pregnancy
D. Arteriovenous fistula

Explanation: ***Superficial venous thrombosis*** - While *superficial venous thrombosis* is a condition affecting veins, it is typically a **complication** or a co-occurring event with varicose veins, rather than a direct cause of their initial formation. - Varicose veins are primarily caused by **venous insufficiency** due to faulty valves, leading to blood pooling and vessel distension. *Arteriovenous fistula* - An *arteriovenous fistula* creates an abnormal connection between an **artery and a vein**, leading to high pressure flow directly into the venous system. - This **increased venous pressure and flow** can overwhelm venous valves and dilate veins, directly causing varicose veins. *Deep venous thrombosis* - *Deep venous thrombosis* can damage venous valves in the deep venous system, leading to **post-thrombotic syndrome** which includes chronic venous insufficiency and the formation of varicose veins due to reflux. - The resulting **venous hypertension** and impaired flow in the deep system can cause superficial veins to dilate and become tortuous. *Pregnancy* - *Pregnancy* is a common cause of varicose veins due to several factors, including **increased circulating blood volume** and the physical pressure of the growing uterus on the inferior vena cava. - Hormonal changes during pregnancy, particularly increased **progesterone**, also contribute by relaxing venous walls, further predisposing to varicosity.

Question 523: According to the Spetzler-Martin grading system for arteriovenous malformations, which of the following scores corresponds to an arteriovenous malformation of size 3-6 cm with deep venous drainage and location near the internal capsule?

A. 3
B. 5
C. 4 (Correct Answer)
D. 2

Explanation: ***4*** - This score aligns with the sum of the points assigned for each feature: 2 points for a **size of 3-6 cm**, 1 point for **deep venous drainage**, and 1 point for **location near the internal capsule**. - The Spetzler-Martin grade is calculated by summing points for size (small <3 cm = 1 pt, medium 3-6 cm = 2 pts, large >6 cm = 3 pts), venous drainage (superficial = 0 pts, deep = 1 pt), and eloquence of adjacent brain (non-eloquent = 0 pts, eloquent = 1 pt). *2* - A score of 2 would correspond to, for example, a medium-sized AVM (2 points) with superficial venous drainage (0 points) in a non-eloquent area (0 points), or a small AVM (1 point) with deep venous drainage (1 point) in another non-eloquent area. - This score does not account for all three high-risk factors described in the question (medium size, deep drainage, eloquent location). *3* - A score of 3 could be generated, for instance, by a large AVM (>6 cm = 3 points) with superficial drainage (0 points) in a non-eloquent area (0 points). - It could also be a medium AVM (2 points) with deep venous drainage (1 point) but in a non-eloquent brain region. *5* - A score of 5 would represent an extremely high-risk AVM, such as a large AVM (>6 cm = 3 points) with deep venous drainage (1 point) and an eloquent location (1 point). - This score would exceed the sum calculated from the specific characteristics given in the question (2 + 1 + 1 = 4).

Question 524: Success of revascularization therapy in acute limb ischemia is mainly dependent on:

A. Extent of collateral circulation
B. Time to intervention (Correct Answer)
C. Patient's comorbidities
D. Quality of distal runoff vessels

Explanation: ***Time to intervention*** - The most critical factor for successful revascularization in acute limb ischemia is the **time from symptom onset to restoration of blood flow**. - Following the principle **"time is tissue"**, irreversible muscle and nerve damage occurs after 6-8 hours of complete ischemia. - Early revascularization (within 6 hours) significantly improves limb salvage rates and functional outcomes. - Delayed intervention leads to reperfusion injury, compartment syndrome, and increased risk of amputation. *Quality of distal runoff vessels* - While important for long-term patency of revascularization, the quality of distal vessels is a secondary factor compared to timing. - Good runoff improves graft patency but cannot reverse already necrotic tissue from delayed intervention. *Patient's comorbidities* - Comorbidities like diabetes and smoking affect long-term outcomes and wound healing. - However, even patients with multiple comorbidities can have successful acute revascularization if performed in time. - Comorbidities influence perioperative risk but are not the primary determinant of revascularization success. *Extent of collateral circulation* - Collateral circulation may delay the onset of irreversible ischemia and provide some protection. - However, in acute limb ischemia, collaterals are often insufficient to prevent tissue damage. - The presence of collaterals cannot compensate for prolonged ischemia time.

Question 525: Sclerotherapy for varicose veins is contraindicated in the following condition:

A. Deep vein Thrombosis (Correct Answer)
B. Varicose ulcers
C. Pigmentation Over limb
D. Hemorrhoids

Explanation: ***Deep vein Thrombosis*** - **Sclerotherapy** involves injecting a solution that irritates and scars the vein, causing it to close. If **deep vein thrombosis (DVT)** is present, this procedure could dislodge a **thrombus**, leading to a potentially fatal **pulmonary embolism**. - Additionally, DVT indicates a compromised deep venous system, and treating superficial veins with sclerotherapy when the deep system is inadequate can lead to **worsened venous insufficiency** and complications. *Varicose ulcers* - **Varicose ulcers** are often a complication of **venous insufficiency**, and **sclerotherapy** can sometimes be used cautiously, in conjunction with compression therapy, to treat the underlying insufficient veins that contribute to ulcer formation. - While it's not a universal treatment for all ulcers, the presence of an ulcer itself is not an absolute **contraindication** if the underlying venous pathology can be safely addressed. *Pigmentation Over limb* - **Pigmentation over the limb** (often **hyperpigmentation**) is a common sign of **chronic venous insufficiency** and a cosmetic concern associated with **varicose veins**. - It is not a contraindication to **sclerotherapy**; in fact, successful treatment of the underlying varicose veins can sometimes lead to an improvement in or prevention of further pigmentation. *Hemorrhoids* - **Hemorrhoids** are essentially **varicose veins** of the **anorectal region**. While **sclerotherapy** can be used to treat hemorrhoids (a procedure called sclerotherapy for hemorrhoids), they are distinct from **lower limb varicose veins**. - The presence of hemorrhoids does not contraindicate **sclerotherapy** for leg varicose veins, as they are separate vascular systems and pathologies.

Question 526: The combination of rest pain, color changes, edema, and hyperesthesia is characteristic of:

A. Gangrenous changes
B. Early ischemic changes (Correct Answer)
C. Localized tissue death
D. Inflammation of blood vessels

Explanation: **Early ischemic changes** - **Rest pain**, **color changes** (pallor, rubor), **edema**, and **hyperesthesia** are classic signs of **acute limb ischemia**, reflecting tissue hypoxia before irreversible damage. - These symptoms indicate a critical reduction in blood flow, prompting medical intervention to prevent progression to more severe stages. *Gangrenous changes* - **Gangrene** represents **tissue necrosis** due to severe ischemia, typically presenting with black discoloration, foul odor, and often a clear line of demarcation. - While it follows ischemia, the described symptoms (rest pain, edema, hyperesthesia) are characteristic of an earlier, *reversible* stage, not irreversible tissue death. *Localized tissue death* - **Localized tissue death** (necrosis) is a general term for dead tissue, which can be caused by various factors, not exclusively ischemia. - It does not specifically encompass the *combination* of rest pain, color changes, edema, and hyperesthesia, which are specific indicators of compromised blood flow. *Inflammation of blood vessels* - **Inflammation of blood vessels (vasculitis)** can cause symptoms like pain and color changes due to impaired blood flow or vessel damage. - However, the specific combination of **rest pain**, **edema**, and **hyperesthesia** is more directly indicative of **ischemia** than just inflammation itself, which might have broader and more varied clinical presentations.

Question 527: Allen's test is useful in evaluating

A. Thoracic outlet syndrome
B. Presence of cervical rib
C. Digital blood flow
D. Integrity of the palmar arch (Correct Answer)

Explanation: ***Assessment of the integrity of the palmar arch.*** - Allen's test assesses the **patency of the radial and ulnar arteries** to ensure adequate blood flow to the hand, particularly before procedures like **arterial line insertion** or **radial artery harvesting**. - It specifically evaluates the integrity of the **palmar arches** (superficial and deep) and their ability to provide collateral circulation if one of the main arteries (radial or ulnar) is occluded. *Thoracic outlet syndrome affects blood flow.* - Thoracic outlet syndrome involves **compression of neurovascular structures** (brachial plexus, subclavian artery/vein) in the thoracic outlet. - While it affects blood flow to the limb, Allen's test is not the primary diagnostic tool; other tests like **Adson's maneuver** or **Wright's test** are more appropriate. *Presence of a cervical rib can affect blood flow.* - A cervical rib can cause **compression of the subclavian artery**, leading to symptoms of vascular compromise in the upper extremity. - However, Allen's test is used for evaluating **hand arterial patency**, not directly for diagnosing a cervical rib. *Assessment of digital blood flow.* - While digital blood flow is ultimately assessed indirectly, the primary purpose of Allen's test is to evaluate the **collateral circulation** via the palmar arch, ensuring the radial or ulnar artery can be safely utilized. - More direct assessments of digital blood flow might involve techniques like **pulse oximetry** or **Doppler ultrasound** over the digits.

Question 528: Adson's test is positive in which of the following conditions?

A. Cervical spine fracture
B. Cervical spondylosis
C. Cervical dislocation
D. Cervical rib (Correct Answer)

Explanation: ***Cervical rib*** - A **cervical rib** can compress the **subclavian artery** or brachial plexus as they pass through the **thoracic outlet**, leading to **vascular symptoms**. - **Adson's test** is positive when the radial pulse diminishes or disappears upon specific maneuvers (extension, external rotation of the arm, and head rotation towards the affected side), indicating compression, often due to a cervical rib. *Cervical spine fracture* - A cervical spine fracture primarily involves **bony integrity** and can lead to **spinal cord compression** or nerve root injury, resulting in neurological deficits, not direct subclavian artery compression detectable by Adson's test. - While there may be pain and instability, it does not typically cause the specific neurovascular compromise Adson's test evaluates. *Cervical spondylosis* - **Cervical spondylosis** is a degenerative condition of the cervical spine that primarily causes **neck pain**, stiffness, and sometimes **nerve root or spinal cord compression** (myelopathy or radiculopathy). - It does not directly involve compression of the **subclavian artery** or its associated neurovascular bundle in the thoracic outlet. *Cervical dislocation* - **Cervical dislocation** is a severe injury involving displacement of vertebral bodies, leading to **spinal cord injury** with significant neurological deficits. - It is an acute traumatic event affecting the spinal column itself rather than causing chronic compression of vessels or nerves in the **thoracic outlet** in a manner assessed by Adson's test.

Question 529: Brodie-Trendelenburg test demonstrates?

A. Mid-thigh perforation
B. Deep vein thrombosis
C. Calf perforators
D. Sapheno-femoral incompetence (Correct Answer)

Explanation: ***Sapheno-femoral incompetence*** - The **Brodie-Trendelenburg test** is specifically designed to assess the competence of the **sapheno-femoral valve** and the presence of ascending reflux in varicose veins. - It involves emptying the veins and observing their refilling pattern after releasing proximal compression, indicating incompetent valves if rapid filling occurs from above. *Mid-thigh perforation* - While the test can indirectly suggest involvement of perforators, it does not directly demonstrate **mid-thigh perforator** incompetence as its primary objective. - Other tests or observations of varices would be more specific for individual perforating veins. *Deep vein thrombosis* - The Brodie-Trendelenburg test is not used to diagnose **deep vein thrombosis (DVT)**. - **DVT** diagnosis typically involves clinical assessment, D-dimer testing, and imaging like duplex ultrasonography. *Calf perforators* - The test can give clues about **calf perforator** incompetence if varices refill from below, but it's not the primary focus or a direct diagnostic for them. - Proper assessment of calf perforators often requires more detailed physical examination and duplex ultrasound.

Question 530: What is the appropriate management for a male patient who presents to the hospital with abdominal pain from cholecystitis and is incidentally detected with an asymptomatic abdominal aortic aneurysm?

A. Immediate surgery
B. Monitor till size reaches 55 mm (Correct Answer)
C. Monitor till size reaches 45 mm
D. USG monitoring till size of the aneurysm reaches 70 mm

Explanation: ***Monitor till size reaches 55 mm*** - For **asymptomatic abdominal aortic aneurysms (AAAs)** in male patients, elective repair is generally recommended when the aneurysm reaches 5.5 cm (55 mm) in diameter. - This size balances the risk of rupture against the risks associated with surgery. *Immediate surgery* - Immediate surgery is reserved for patients with a **symptomatic** or **ruptured AAA**, indicated by severe abdominal pain, hypotension, and a pulsatile mass. - An incidentally detected, asymptomatic AAA typically does not warrant emergency surgical intervention. *Monitor till size reaches 45 mm* - A 45 mm aneurysm in a male patient is typically managed with **regular surveillance** rather than immediate intervention. - The risk of rupture at this size is generally considered low enough to avoid the risks of elective surgery. *USG monitoring till size of the aneurysm reaches 70 mm* - Monitoring an AAA until it reaches 70 mm (7 cm) is **not safe practice** due to a significantly increased risk of rupture as the aneurysm grows beyond 5.5 cm. - Guidelines recommend intervention at 5.5 cm to prevent life-threatening rupture.

Practice by Chapter

Atherosclerotic Disease

Practice Questions

Aortic Aneurysms

Practice Questions

Peripheral Arterial Disease

Practice Questions

Carotid Artery Disease

Practice Questions

Venous Thromboembolism

Practice Questions

Chronic Venous Insufficiency

Practice Questions

Mesenteric Vascular Disease

Practice Questions

Vascular Trauma

Practice Questions

Vascular Access for Hemodialysis

Practice Questions

Endovascular Techniques

Practice Questions

Diabetic Foot Vascular Disease

Practice Questions

Vasculitis

Practice Questions

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