Vascular Surgery Practice Questions

Q: Popliteal artery pulsations are difficult to feel because?

It is not superficial and does not cross a prominent bone. **Explanation:** The popliteal artery is the deepest structure in the popliteal fossa. To palpate any arterial pulse effectively, the artery must ideally be **superficial** and lie against a **hard, prominent bone** (which acts as a "backboard" for compression). **Why Option C is Correct:** The popliteal artery fails on both counts: 1. **Depth:** It lies deep within the popliteal fossa, covered by skin, dense popliteal fascia, and a thick layer of fat. 2. **Lack of Bony Prominence:** Unlike the radial artery (against the radius) or the femoral artery (against the head of the femur), the popliteal artery lies against the flat popliteal surface of the femur and the posterior capsule of the knee joint. It does not cross a superficial bony prominence, making it difficult to compress. **Analysis of Incorrect Options:** * **Option A & B:** These are partially correct but incomplete. The difficulty is a combined result of both its deep location and the absence of an underlying bony ridge. * **Option D:** This is incorrect. The popliteal artery is a large-caliber vessel with strong pulsations; the difficulty in palpation is purely anatomical, not hemodynamic. **Clinical Pearls for NEET-PG:** * **Palpation Technique:** To feel the pulse, the knee should be slightly flexed (to relax the popliteal fascia) and the clinician must use deep bimanual palpation in the midline of the fossa. * **Aneurysm:** The popliteal artery is the most common site for peripheral arterial aneurysms. A "prominent" or easily felt popliteal pulse should raise suspicion of an aneurysm. * **Entrapment:** Popliteal Artery Entrapment Syndrome (PAES) occurs due to an abnormal relationship with the medial head of the gastrocnemius.

Q: Lower leg perforators are named after which of the following?

Cockett. **Explanation:** Perforating veins are crucial vessels that connect the superficial venous system to the deep venous system by piercing the deep fascia. In the lower limb, these are categorized based on their anatomical location. **1. Why Cockett is Correct:** **Cockett’s perforators** are specifically located in the **lower leg** (posterior arch vein). They connect the Great Saphenous vein (GSV) territory to the deep posterior tibial veins. They are clinically significant as they are frequently involved in the development of venous ulcers (Gaiter zone). They are divided into Upper, Middle, and Lower Cockett perforators, located approximately 13.5 cm, 8.5 cm, and 5 cm above the medial malleolus, respectively. **2. Analysis of Incorrect Options:** * **Boyd’s Perforators:** These are located in the **upper medial calf** (just below the knee), connecting the GSV to the posterior tibial veins. * **Dodd’s Perforators:** These are located in the **lower thigh** (distal third), connecting the GSV to the femoral vein within the adductor (Hunterian) canal. * **May or Kuster Perforators:** These are located in the **ankle** region, specifically connecting the GSV to the deep veins at the level of the medial malleolus. **Clinical Pearls for NEET-PG:** * **Direction of Flow:** In healthy individuals, blood flows from the superficial to the deep system. Valvular incompetence in perforators leads to "outward" flow, causing superficial varicosities and skin changes. * **Hunterian Perforator:** Located in the mid-thigh. * **Gaiter Zone:** The area of the lower leg (medial aspect) most prone to venous stasis and ulceration, primarily due to Cockett’s perforator incompetence. * **Trendelenburg Test:** Used clinically to differentiate between saphenofemoral incompetence and perforator incompetence.

Q: What is the term for fan-shaped patterns of small intradermal veins on the medial or lateral aspect of the ankle?

Corona phlebectasia. **Explanation:** **Corona phlebectasia** (also known as *Corona phlebectatica paraplantaris*) is the correct term for the fan-shaped pattern of small, dilated intradermal veins found on the medial or lateral aspects of the ankle and foot. It is a clinical sign of chronic venous insufficiency (CVI) and is classified as **C1** in the CEAP classification. It typically results from the incompetence of the perforating veins and the saphenous system, leading to high pressure in the dermal venous plexus. **Analysis of Incorrect Options:** * **Saphena varix:** This is a saccular aneurysm or localized dilation of the Great Saphenous Vein at its junction with the femoral vein (Saphenofemoral junction). It presents as a soft swelling in the groin that disappears on lying down and exhibits a cough impulse. * **Hyphen webs:** This is an older, less specific term sometimes used to describe telangiectasias or spider veins, but it does not specifically refer to the fan-shaped ankle distribution characteristic of Corona phlebectasia. * **Dermal flare:** While "flare" is often used colloquially to describe redness or telangiectasias, it is not the formal anatomical term for this specific ankle venous pattern. **High-Yield Clinical Pearls for NEET-PG:** * **CEAP Classification:** Remember that Corona phlebectasia is a strong clinical predictor of advanced venous disease (often progressing to C4-C6, i.e., skin changes and ulcers). * **Location:** It is most commonly seen on the **medial** aspect of the ankle. * **Significance:** Its presence indicates significant underlying venous hypertension, even if large varicose veins are not visible.

Q: What is the most common type of primary lymphedema?

Lymphedema precox. **Explanation:** Primary lymphedema is a developmental abnormality of the lymphatic system, classified based on the age of onset. **Lymphedema Precox (Option B)** is the most common type of primary lymphedema, accounting for approximately **65–80% of cases**. It is defined by an onset between the ages of 1 and 35 years. It typically manifests during puberty or pregnancy, suggesting a hormonal influence on lymphatic demand. It is more common in females and usually presents as unilateral swelling of the lower limbs. **Why other options are incorrect:** * **Lymphedema Congenita (Option A):** This accounts for about 10–15% of cases. It is present at birth or manifests within the first year of life. When it is familial (autosomal dominant), it is known as **Milroy’s disease**. * **Lymphedema Tarda (Option C):** This is the rarest form (approx. 10%), occurring after the age of 35. It is often associated with a defect in the lymphatic valves. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of lymphedema worldwide:** Filariasis (*Wuchereria bancrofti*). * **Most common cause of lymphedema in developed countries:** Secondary to malignancy or its treatment (e.g., Axillary lymph node dissection for Breast Cancer). * **Stemmer’s Sign:** Inability to pinch the skin on the dorsal surface of the base of the second toe; a pathognomonic clinical sign of lymphedema. * **Stewart-Treves Syndrome:** A rare, highly aggressive angiosarcoma arising in a limb with chronic long-standing lymphedema.

Q: Nicoladini's Branham sign is seen in which of the following conditions?

Arteriovenous fistula. **Explanation:** **Nicoladini-Branham sign** is a classic clinical finding diagnostic of a large, long-standing **Arteriovenous (AV) fistula**. **Why the correct answer is right:** In an AV fistula, blood shunts directly from the high-pressure arterial system to the low-pressure venous system, bypassing the capillary bed. This leads to increased venous return and a compensatory increase in cardiac output (tachycardia). When the fistula is manually compressed (occluded), the shunting stops. This results in an immediate increase in peripheral resistance and a sudden surge in vagal tone, leading to **reflex bradycardia** and a rise in blood pressure. This physiological response is the Nicoladini-Branham sign. **Why the incorrect options are wrong:** * **Aortic dissection:** Characterized by a tear in the tunica intima; clinical signs include "tearing" chest pain and pulse deficits, not reflex bradycardia upon compression. * **Buerger's disease (Thromboangiitis obliterans):** An inflammatory occlusive disease of small/medium arteries. It presents with claudication and gangrene; the relevant clinical test is **Allen’s test** or **Buerger’s test** (postural color changes). * **Aneurysm:** While an aneurysm may present with a pulsatile mass, it does not involve a shunt. Compression of an aneurysm does not typically elicit a reflex heart rate change. **High-Yield Clinical Pearls for NEET-PG:** * **AV Fistula Triad:** Pulsatile mass, palpable thrill, and continuous "machinery" murmur (bruit). * **Proximal vs. Distal:** Proximal to the fistula, the artery is dilated and thin-walled; distal to it, there may be features of chronic ischemia. * **Complication:** Large AV fistulas can lead to **High-Output Cardiac Failure** due to the persistent increase in venous return.

Q: Acute vascular ischemia manifests as?

Pulselessness. **Explanation:** Acute Limb Ischemia (ALI) is a surgical emergency caused by a sudden decrease in arterial limb perfusion. The clinical diagnosis is classically based on the **"6 Ps"**, which represent the hallmark signs of arterial occlusion. **Why Pulselessness is Correct:** Pulselessness (Option A) is one of the cardinal "6 Ps." When an embolus or thrombus obstructs an artery, blood flow distal to the occlusion ceases, leading to the loss of palpable pulses. This is often the most objective finding in early ischemia. The other 5 Ps include: **Pain** (sudden and severe), **Pallor** (pale skin), **Poikilothermia** (cold limb), **Paresthesia** (numbness), and **Paralysis** (loss of motor function). **Why Incorrect Options are Wrong:** * **Syncope (B):** This refers to a transient loss of consciousness, usually due to global cerebral hypoperfusion, not peripheral vascular occlusion. * **Flushing (C):** Ischemic limbs are typically pale (Pallor) or mottled (cyanotic). Flushing or rubor is more characteristic of chronic limb ischemia (Buerger’s test) or inflammatory conditions like cellulitis. * **Oedema (D):** Swelling is a feature of **Venous** obstruction (e.g., DVT) or Reperfusion Injury. In acute arterial ischemia, the limb is typically "empty" of fluid, not edematous. **NEET-PG High-Yield Pearls:** * **Golden Period:** Revascularization should ideally occur within **6 hours** to prevent irreversible muscle necrosis. * **Earliest Sign:** Pain is usually the first symptom. * **Worst Prognostic Sign:** Paralysis and Paresthesia indicate advanced nerve/muscle ischemia and potential irreversibility. * **Investigation of Choice:** Digital Subtraction Angiography (DSA) is the gold standard, but treatment (Heparinization) should not be delayed for imaging if the diagnosis is clinically clear.

Q: Pseudoaneurysm in a drug abuser is typically seen in which artery?

Femoral. **Explanation:** **1. Why Femoral is Correct:** In intravenous (IV) drug abusers, the **femoral artery** is the most common site for pseudoaneurysm formation. This occurs due to "groin hitting"—the practice of injecting drugs directly into the femoral vein when peripheral veins become sclerosed. Because the femoral artery lies immediately lateral to the vein within the femoral sheath, accidental arterial puncture is frequent. Unlike a true aneurysm, a pseudoaneurysm (false aneurysm) is a pulsatile hematoma contained only by the surrounding fibrous tissue or adventitia, resulting from persistent leakage of blood through the arterial wall defect. **2. Analysis of Incorrect Options:** * **Radial/Brachial Artery:** While these are common sites for peripheral IV access, they are less frequently used for deep "blind" injections by drug abusers compared to the femoral vessels. Pseudoaneurysms here are more commonly iatrogenic (e.g., post-catheterization). * **Carotid Artery:** Injection into the neck ("pocket shots") is extremely dangerous and less common than groin injections. It carries a high risk of immediate stroke, airway compromise, or air embolism. **3. Clinical Pearls for NEET-PG:** * **Clinical Presentation:** A pulsatile, painful mass in the groin, often associated with a "to-and-fro" murmur on auscultation. * **Gold Standard Diagnosis:** Duplex Ultrasonography (shows the characteristic "Yin-Yang" sign of turbulent flow). * **Complications:** The most feared complication is **infected (mycotic) pseudoaneurysm**, which carries a high risk of rupture and limb loss. * **Management:** Small, non-infected cases may be treated with ultrasound-guided thrombin injection. However, in drug abusers, surgical debridement and arterial repair (or ligation) are often required due to the high risk of underlying infection.

Q: Passive forcible dorsiflexion of the foot with the knee extended causes pain in the calf. What is this sign called?

Homan's sign. **Explanation:** **Homan’s sign** is a classic clinical sign used in the assessment of Deep Vein Thrombosis (DVT). It is elicited by performing **passive dorsiflexion of the foot** while the **knee is extended**. This maneuver stretches the gastrocnemius and soleus muscles, which in turn compresses the inflamed deep veins of the calf, resulting in pain. While historically popular, it is now considered unreliable due to low sensitivity and specificity, and there is a theoretical risk of dislodging a clot (embolization). **Analysis of Incorrect Options:** * **Moses sign:** This involves squeezing the calf muscles against the tibia. Pain on anteroposterior compression (but not lateral compression) suggests DVT. * **Schwartz sign (Hackney’s test):** Used in the assessment of varicose veins. A tap on the lower part of a long saphenous vein produces a palpable impulse at the saphenofemoral junction if the valves are incompetent. * **Fegan’s test:** Used to identify the site of incompetent perforators in varicose veins. The patient stands until veins are prominent, then lies down with the leg elevated; the clinician palpates for "blow-outs" or circular defects in the deep fascia. **NEET-PG High-Yield Pearls:** * **Gold Standard Investigation for DVT:** Colour Doppler Ultrasound (Duplex Scan). * **Virchow’s Triad:** Stasis, Hypercoagulability, and Endothelial injury (the three factors contributing to venous thrombosis). * **Pratt’s Sign:** Presence of prominent "sentinel" veins in the pretibial area, another clinical indicator of DVT. * **Clinical Utility:** Clinical signs like Homan’s are insufficient for diagnosis; the **Wells Score** is the preferred clinical tool to determine the probability of DVT.

Question 1

Popliteal artery pulsations are difficult to feel because?

Accepted Answer

It is not superficial and does not cross a prominent bone

Answer

It is not superficial

Answer

It does not cross a prominent bone

Answer

Its pulsations are weak

Question 2

Lower leg perforators are named after which of the following?

Accepted Answer

Cockett

Answer

Boyd

Answer

Dodd

Answer

May or Kuster

Question 3

What is the term for fan-shaped patterns of small intradermal veins on the medial or lateral aspect of the ankle?

Accepted Answer

Corona phlebectasia

Answer

Saphena varix

Answer

Hyphen webs

Answer

Dermal flare

Question 4

What is the most common type of primary lymphedema?

Accepted Answer

Lymphedema precox

Answer

Lymphedema congenital

Answer

Lymphedema tarda

Answer

None of the above

Question 5

What is the preferred shunt procedure in a patient with portal hypertension who has acceptable operative risk and adequate liver function?

Accepted Answer

Distal splenorenal shunt

Answer

End to side portocaval shunt

Answer

End to end portocaval shunt

Answer

Mesocaval shunt

Question 6

What is the primary surgical procedure for managing varicose veins?

Accepted Answer

Stripping

Answer

Multiple subcutaneous ligatures

Answer

Subfascial ligatures

Answer

Division and ligation of the superficial venous system

Question 7

Nicoladini's Branham sign is seen in which of the following conditions?

Accepted Answer

Arteriovenous fistula

Answer

Aortic dissection

Answer

Buerger's disease

Answer

Aneurysm

Question 8

Acute vascular ischemia manifests as?

Accepted Answer

Pulselessness

Answer

Syncope

Answer

Flushing

Answer

Oedema

Question 9

Pseudoaneurysm in a drug abuser is typically seen in which artery?

Accepted Answer

Femoral

Answer

Radial

Answer

Brachial

Answer

Carotid

Question 10

Passive forcible dorsiflexion of the foot with the knee extended causes pain in the calf. What is this sign called?

Accepted Answer

Homan's sign

Answer

Moses sign

Answer

Schwartz sign

Answer

Fegan's test

Vascular Surgery — MCQs

Vascular Surgery — MCQs

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