Vascular Surgery Practice Questions

Q: Which of the following is false about Popliteal entrapment syndrome?

Mainly due to atherosclerosis. **Explanation:** **Popliteal Entrapment Syndrome (PES)** is a developmental vascular anomaly, not a degenerative one. 1. **Why Option A is correct (The False Statement):** Popliteal entrapment syndrome is a **congenital anatomical variation**, not caused by atherosclerosis. It occurs due to an embryonic error in the development of the popliteal artery or the surrounding musculature (most commonly the medial head of the gastrocnemius). While chronic entrapment can lead to secondary intimal damage and premature localized atherosclerosis, the primary etiology is mechanical compression. 2. **Analysis of Incorrect Options:** * **Option B:** Exercise-induced calf claudication is the classic presentation. It typically affects young, athletic individuals (often males under 30) who present with leg pain during exertion due to the muscle compressing the artery. * **Option C:** A hallmark clinical sign is the **diminution or disappearance of pedal pulses** during active plantar flexion or passive dorsiflexion of the ankle, as these maneuvers tighten the gastrocnemius muscle against the artery. * **Option D:** The most common anatomical defect (Type I and II) involves an **abnormal relationship** where the popliteal artery follows a medial course around the medial head of the gastrocnemius or the muscle itself originates more laterally than normal. **NEET-PG High-Yield Pearls:** * **Demographics:** Young athletes with no cardiovascular risk factors presenting with claudication. * **Classification:** There are 6 types; **Type VI** is "Functional Entrapment" (no anatomical anomaly, just hypertrophied muscles). * **Diagnosis:** Gold standard is **Digital Subtraction Angiography (DSA)** or MR Angiography with provocative maneuvers (stress views). * **Treatment:** Surgical release of the compressing band or muscle (myotomy) and arterial reconstruction if damaged.

Q: What is the recurrence rate of varicose veins after surgery?

About 10%. **Explanation:** The recurrence of varicose veins after surgical intervention (typically Trendelenburg procedure with stripping) is a significant clinical consideration. While historical data often cited higher rates due to incomplete surgery, modern surgical standards and long-term follow-up studies indicate a recurrence rate of **approximately 10%**. **Why Option A is correct:** Recurrence is primarily attributed to **neovascularization** (the development of new, incompetent vessels at the site of the previous saphenofemoral junction ligation) or tactical errors such as failing to ligate all tributaries of the saphenofemoral junction. In well-performed surgeries, the 5-to-10-year recurrence rate stabilizes around 10%. **Why other options are incorrect:** * **Option B (25%):** This figure is often associated with minor "residual" veins or telangiectasias rather than true clinical recurrence of the primary truncal varicosity. * **Options C & D (50% and >60%):** These rates are excessively high for standard surgery. Such high numbers are usually only seen in cases of complex recurrent disease, deep venous insufficiency, or when conservative management is compared against surgical outcomes over several decades. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site of recurrence:** The saphenofemoral junction (SFJ). * **REVAS (Recurrent Varices After Surgery):** This is the standardized classification used to categorize the etiology of recurrence. * **Gold Standard Investigation:** Duplex Ultrasound is the investigation of choice to identify the site of reflux in recurrent cases. * **Trendelenburg Procedure:** Involves juxta-femoral ligation of the SFJ and all its tributaries (Superficial circumflex iliac, Superficial epigastric, and Superficial external pudendal veins) to minimize recurrence.

Q: Which of the following is NOT a characteristic of a venous ulcer?

Deep pale wound bed. **Explanation:** Venous ulcers (stasis ulcers) result from chronic venous insufficiency and venous hypertension. The correct answer is **B (Deep pale wound bed)** because this is a classic feature of **arterial ulcers**, not venous ones. 1. **Why Option B is the correct answer:** Venous ulcers are typically **superficial** and have a **beefy red, granular wound bed** due to high vascularity and exudate. A "deep, pale, or necrotic" wound bed indicates poor arterial perfusion (ischemia), which is characteristic of arterial ulcers (e.g., Atherosclerosis or Buerger’s disease). 2. **Why other options are incorrect:** * **Irregular wound margins (A):** Venous ulcers are known for shaggy, irregular borders, unlike the "punched-out" neat edges of arterial ulcers. * **Usually no pain (C):** While they can be achy, venous ulcers are relatively painless compared to the excruciating pain associated with ischemic arterial ulcers. * **Ruddy, granular tissue (D):** This reflects healthy granulation tissue forming in a highly congested, vascular environment. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Venous ulcers occur in the **"Gaiter Zone"** (medial malleolus). Arterial ulcers occur on pressure points, toes, or the lateral malleolus. * **Associated Findings:** Look for **Lipodermatosclerosis** (inverted champagne bottle leg), **hemosiderin staining** (brownish discoloration), and varicose veins. * **Investigation of Choice:** Venous Doppler (to assess reflux). * **Treatment Gold Standard:** Compression therapy (e.g., **Unna boot** or four-layer bandaging). *Note: Compression is contraindicated in arterial ulcers.*

Q: CABG is done for all of the following indications except?

To prevent progression of native blood vessel disease. **Explanation:** Coronary Artery Bypass Grafting (CABG) is a revascularization procedure designed to bypass obstructive lesions in the coronary arteries. It is crucial to understand that while CABG provides a new conduit for blood flow, it **does not stop the underlying pathophysiology of atherosclerosis** in the native vessels. In fact, native vessel disease often continues to progress, and the bypass grafts themselves (especially venous grafts) are susceptible to atherosclerosis over time. **Analysis of Options:** * **Option D (Correct):** CABG is a mechanical solution to a biological problem. It improves distal perfusion but does not alter the systemic risk factors (like diabetes, hypertension, or dyslipidemia) that drive the progression of native coronary artery disease. * **Option A:** Reducing symptoms (angina) is a primary indication for CABG, especially in patients who remain symptomatic despite optimal medical therapy. * **Option B:** CABG is performed to prevent "catastrophes" such as acute myocardial infarction and heart failure by stabilizing blood supply to the myocardium. * **Option C:** Prolonging life (mortality benefit) is a proven indication for CABG in specific subsets, such as Left Main Stem disease, triple-vessel disease with low EF, or involvement of the proximal LAD. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Graft:** The **Left Internal Mammary Artery (LIMA)** is the graft of choice for the LAD due to its superior long-term patency (90% at 10 years). * **Most Common Venous Graft:** The Great Saphenous Vein. * **Indications for Mortality Benefit:** 1. Left Main Disease (>50% stenosis). 2. Triple Vessel Disease (especially with decreased EF). 3. Two-vessel disease involving the proximal LAD. 4. Diabetic patients with multivessel disease.

Q: What is the most common site for emboli to lodge in the lower limb?

Bifurcation of common femoral artery. **Explanation:** The correct answer is **D. Bifurcation of common femoral artery.** **1. Why the Common Femoral Artery (CFA) Bifurcation is correct:** Emboli typically lodge at sites where the arterial caliber suddenly narrows, most commonly at **arterial bifurcations** or points of tapering. In the lower limb, the **bifurcation of the common femoral artery** into the superficial femoral and profunda femoris arteries is the most frequent site (accounting for approximately 35-40% of lower limb cases). This is because the CFA is a large vessel that abruptly divides into two smaller branches, creating a mechanical trap for migrating clots, usually originating from the heart (atrial fibrillation). **2. Analysis of Incorrect Options:** * **A. Popliteal artery:** This is the **second most common** site for embolic lodgment (approx. 15-20%). While common, it occurs less frequently than the femoral bifurcation. * **B & C. Dorsalis pedis and Posterior tibial arteries:** These are distal, smaller-caliber vessels. While emboli can reach these sites (distal embolization), most clinically significant emboli are large enough to be trapped at more proximal, larger bifurcations (Femoral or Iliac). **3. Clinical Pearls for NEET-PG:** * **Most common source of emboli:** The Heart (80%), specifically due to **Atrial Fibrillation** or post-MI mural thrombi. * **Most common site in the entire body:** The **Femoral Artery bifurcation** is the most common site overall for peripheral arterial emboli. * **The "6 Ps" of Acute Ischemia:** Pain, Pallor, Pulselessness, Paresthesia, Paralysis, and Poikilothermia (coldness). * **Management:** The gold standard for retrieval is **Fogarty catheter embolectomy**. * **Order of frequency in lower limb:** Common Femoral > Popliteal > Iliac > Aortic saddle embolus.

Q: Chronic lymphedema of the limb is predisposed to all of the following except?

Marjolin's ulcer. **Explanation:** The correct answer is **C. Marjolin's ulcer**. Chronic lymphedema results from impaired lymphatic drainage, leading to the accumulation of protein-rich interstitial fluid. This creates a state of localized "immune surveillance deficiency," predisposing the limb to specific complications. * **Why Marjolin's Ulcer is the exception:** A Marjolin’s ulcer is a **Squamous Cell Carcinoma (SCC)** that arises in areas of chronic inflammation, such as **chronic burn scars (most common)**, chronic osteomyelitis sinuses, or long-standing venous ulcers. It is not a recognized complication of chronic lymphedema. * **Option A (Thickening of the skin):** Chronic protein accumulation stimulates fibroblast activity and keratinocyte proliferation, leading to **hyperkeratosis, acanthosis, and brawny induration** (non-pitting edema). This is a hallmark of late-stage lymphedema (Elephantiasis). * **Option B (Recurrent soft tissue infections):** Stagnant lymphatic fluid is an excellent culture medium. Combined with impaired local immunity, patients frequently suffer from recurrent **cellulitis and lymphangitis** (often Streptococcal). * **Option D (Sarcoma):** Long-standing lymphedema (usually >10 years) predisposes to **Angiosarcoma**, a highly aggressive vascular tumor. When this occurs specifically following post-mastectomy lymphedema, it is known as **Stewart-Treves Syndrome**. **High-Yield Clinical Pearls for NEET-PG:** * **Stewart-Treves Syndrome:** Classically associated with post-radical mastectomy lymphedema; presents as purple-red skin nodules. * **Stemmer’s Sign:** Inability to pinch the skin on the dorsal surface of the second toe; a pathognomonic clinical sign for lymphedema. * **Investigation of Choice:** Lymphoscintigraphy is the gold standard for diagnosing lymphatic obstruction.

Question 1

Which of the following is NOT true regarding the modified Perthes test?

Accepted Answer

It is solely a subjective test.

Answer

A tourniquet is applied below the saphenofemoral junction.

Answer

Absence of perforator incompetence is required to perform this test.

Answer

Shrinkage of varicose veins upon testing suggests normal deep venous function.

Question 2

Thrombo-angiitis Obliterans (Buerger's disease) primarily affects which of the following vascular structures?

Accepted Answer

Arteriovenous fistulas

Answer

Arteries

Answer

Veins

Answer

Nerves

Question 3

The commonest site of rupture of abdominal aortic aneurysms is NOT related to which of the following?

Accepted Answer

Left retroperitoneum

Answer

Answer

Posterior

Answer

Right retroperitoneum

Question 4

Which of the following is false about Popliteal entrapment syndrome?

Accepted Answer

Mainly due to atherosclerosis

Answer

Exercise induced calf claudication

Answer

Decreased ankle pulse on ankle flexion

Answer

Abnormal relation between the medial head of the gastrocnemius and the popliteal artery

Question 5

What is the recurrence rate of varicose veins after surgery?

Accepted Answer

About 10%

Answer

About 25%

Answer

About 50%

Answer

Over 60%

Question 6

Which of the following is NOT a characteristic of a venous ulcer?

Accepted Answer

Deep pale wound bed

Answer

Irregular wound margins

Answer

Usually no pain

Answer

Ruddy, granular tissue

Question 7

CABG is done for all of the following indications except?

Accepted Answer

To prevent progression of native blood vessel disease

Answer

To reduce symptoms

Answer

To prevent further catastrophes

Answer

To prolong life

Question 8

What is the most common site for emboli to lodge in the lower limb?

Accepted Answer

Bifurcation of common femoral artery

Answer

Popliteal artery

Answer

Dorsalis pedis artery

Answer

Posterior tibial artery

Question 9

A smoker patient presents with an abdominal aortic aneurysm of 44 mm diameter with non-specific abdominal pain. What is the ideal management?

Accepted Answer

Surgical intervention when the diameter becomes greater than 55 mm

Answer

Immediate surgical intervention

Answer

Serial ultrasonography advised until it becomes 77 mm in diameter

Answer

No treatment is needed

Question 10

Chronic lymphedema of the limb is predisposed to all of the following except?

Accepted Answer

Marjolin's ulcer

Answer

Thickening of the skin

Answer

Recurrent soft tissue infections

Answer

Sarcoma

Vascular Surgery — MCQs

Vascular Surgery — MCQs

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