Vascular Surgery Practice Questions

Q: A 57-year-old female presented with shoe-claudication. Peripheral aneurysm was suspected. Which of the following is the most common site of peripheral aneurysm?

Popliteal artery. **Explanation:** The **popliteal artery** is the most common site for peripheral arterial aneurysms, accounting for approximately **70–80%** of all peripheral cases. These aneurysms are frequently associated with abdominal aortic aneurysms (AAA); about 50% of patients with a popliteal aneurysm will have a synchronous AAA. Furthermore, they are often bilateral (50–70% of cases). The clinical presentation often involves "shoe-claudication" or distal ischemia due to thrombosis or embolism, rather than rupture. **Analysis of Options:** * **Popliteal Artery (Correct):** As the most frequent site, it is a high-yield fact for surgical exams. It is defined as a dilation >1.5 times the normal diameter. * **Femoral Artery (Incorrect):** This is the second most common site for peripheral aneurysms (specifically the common femoral artery). While significant, it occurs less frequently than popliteal aneurysms. * **Radial and Brachial Arteries (Incorrect):** Aneurysms in the upper extremities are rare. When they occur, they are often "pseudoaneurysms" resulting from trauma or iatrogenic injury (e.g., arterial lines or catheterization) rather than true atherosclerotic aneurysms. **NEET-PG High-Yield Pearls:** * **Rule of 50s:** 50% of popliteal aneurysms are bilateral; 50% are associated with an AAA. * **Most common complication:** Thromboembolism leading to "Blue Toe Syndrome" or acute limb ischemia (Rupture is rare, unlike AAA). * **Diagnosis:** Duplex Ultrasonography is the initial investigation of choice. * **Indication for Surgery:** Symptomatic patients or asymptomatic aneurysms >2 cm in diameter.

Q: Most commonly, varicose veins are seen with which of the following?

Long saphenous vein. **Explanation:** Varicose veins are dilated, tortuous, and elongated superficial veins caused by valvular incompetence and increased venous pressure. **Why Option A is Correct:** The **Long Saphenous Vein (LSV)**, also known as the Great Saphenous Vein, is the most common site for primary varicose veins. This is due to its significant length (the longest vein in the body) and the high hydrostatic pressure it must withstand while draining the medial aspect of the leg and thigh. The most frequent site of valvular failure is the **saphenofemoral junction (SFJ)**, where the LSV joins the common femoral vein. **Why Other Options are Incorrect:** * **Option B:** While the Short Saphenous Vein (SSV) can become varicose (often due to saphenopopliteal junction incompetence), it is statistically less common than LSV involvement. * **Option C:** Although both can be involved simultaneously, the question asks for the "most common" single site, which remains the LSV. * **Option D:** Popliteal and femoral veins are **deep veins**. Varicose veins, by definition, involve the superficial venous system. Incompetence in deep veins leads to Chronic Venous Insufficiency (CVI) or DVT, not primary varicosities. **Clinical Pearls for NEET-PG:** * **Trendelenburg Test:** Used to differentiate between saphenofemoral incompetence and perforator incompetence. * **Gold Standard Investigation:** Duplex Ultrasound (Doppler) is the investigation of choice to map the anatomy and identify reflux. * **Treatment of Choice:** Endovenous Thermal Ablation (Laser/Radiofrequency) has largely replaced traditional "Stripping and Ligation." * **Brodie-Trendelenburg Test:** Specifically identifies the level of valvular incompetence.

Q: What is the gold standard investigation of choice for deep vein thrombosis?

Venography. **Explanation:** The **gold standard** investigation for Deep Vein Thrombus (DVT) is **Ascending Contrast Venography**. This procedure involves injecting a radiopaque contrast medium into a dorsal foot vein and using fluoroscopy to visualize the deep venous system. A diagnosis of DVT is confirmed by the presence of a persistent **intraluminal filling defect** seen in at least two different projections. **Analysis of Options:** * **Venography (Correct):** While it is the definitive "gold standard" due to its high accuracy, it is rarely performed in modern clinical practice because it is invasive, painful, and carries risks like contrast-induced nephropathy or even iatrogenic venous thrombosis. * **Duplex Ultrasound (Incorrect):** This is the **investigation of choice (IOC)** and the first-line screening tool in clinical practice. It has high sensitivity and specificity for proximal DVT but is not considered the "gold standard" because it is operator-dependent and less accurate for calf vein or pelvic thrombi. * **CT/MRI (Incorrect):** CT Venography and MRV are highly accurate and useful for evaluating DVT in the pelvic veins or Vena Cava (where ultrasound is limited), but they are not the established gold standard. **Clinical Pearls for NEET-PG:** * **Investigation of Choice (IOC):** Color Duplex Ultrasound (Non-invasive). * **Gold Standard:** Contrast Venography (Invasive). * **Most sensitive blood test:** D-Dimer (High negative predictive value; used to rule out DVT in low-risk patients). * **Wells Criteria:** Used for clinical probability scoring of DVT. * **Phlegmasia Cerulea Dolens:** A limb-threatening emergency characterized by massive iliofemoral DVT causing total venous occlusion and cyanosis.

Q: Which of the following is NOT included in the treatment of femoral artery aneurysm?

CT scan. **Explanation:** The question asks for the option that is **NOT** a treatment modality for a femoral artery aneurysm. **1. Why CT scan is the correct answer:** A **CT scan (specifically CT Angiography)** is a **diagnostic imaging tool**, not a therapeutic intervention. While it is essential for planning surgery by defining the anatomy, extent, and involvement of the profunda femoris, it does not treat the aneurysm itself. In the context of "treatment," diagnostic modalities are excluded. **2. Why the other options are incorrect (Treatment Modalities):** * **Ultrasound-guided compression (UGCR):** This is a non-invasive treatment specifically used for **pseudoaneurysms** (false aneurysms), often occurring after femoral artery catheterization. Pressure is applied to the neck to induce thrombosis. * **Thrombin injection:** Ultrasound-guided thrombin injection (UGTI) is currently the gold standard for treating femoral pseudoaneurysms. It has a higher success rate and is faster than compression. * **Bypass graft repair:** This is the definitive **surgical treatment** for true femoral artery aneurysms. The aneurysm is usually excluded or resected, and arterial continuity is restored using a prosthetic (PTFE/Dacron) or autologous vein graft. **Clinical Pearls for NEET-PG:** * **Definition:** A femoral artery aneurysm is defined as a permanent localized dilation >50% of the normal vessel diameter. * **Most Common Site:** The **common femoral artery** is the most common site for peripheral artery aneurysms (after the popliteal artery). * **Association:** 50-70% of patients with a femoral artery aneurysm have a concomitant **Abdominal Aortic Aneurysm (AAA)**. Always screen the abdomen. * **Indication for Surgery:** Symptomatic aneurysms or asymptomatic aneurysms **>2.5 cm** in diameter. * **Complications:** Unlike AAA (which tends to rupture), peripheral aneurysms more commonly lead to **thromboembolism and distal ischemia**.

Q: Which one of the following reagents is not used as a sclerosant in the treatment of bleeding varices?

Ethyl alcohol. In the management of esophageal varices, **Sclerotherapy** involves injecting a chemical agent (sclerosant) into or around the varix to induce thrombosis, inflammation, and eventual fibrosis. ### **Explanation of the Correct Answer** **A. Ethyl alcohol:** While ethanol is a potent dehydrating agent, it is **not** used as a sclerosant for bleeding esophageal varices. Its use is primarily restricted to the percutaneous ablation of vascular malformations (like hemangiomas) or certain tumors. If used in the esophagus, it causes excessive tissue necrosis and carries a high risk of transmural perforation. ### **Analysis of Incorrect Options** * **B. Ethanolamine oleate:** This is one of the most commonly used sclerosants for varices. It is a synthetic surfactant that causes endothelial damage and localized thrombosis. * **C. Phenol:** Specifically used as **5% Phenol in almond oil**, it is a classic sclerosant. While more common in the treatment of hemorrhoids, it has historically been used for variceal sclerotherapy. * **D. Sodium morrhuate:** A mixture of sodium salts of fatty acids derived from cod liver oil. It is an effective sclerosing agent that initiates an inflammatory response leading to vein obliteration. ### **High-Yield Clinical Pearls for NEET-PG** * **Mechanism:** Sclerosants work by causing endothelial damage, which triggers the extrinsic coagulation pathway. * **Other Sclerosants:** **Sodium Tetradecyl Sulfate (STDS)** and **Polidocanol** are other frequently used agents. Polidocanol is often preferred due to a lower incidence of post-procedure pain and ulceration. * **Current Gold Standard:** Endoscopic Variceal Ligation (EVL) or **"Banding"** has largely replaced sclerotherapy as the first-line treatment for esophageal varices due to fewer complications (like esophageal strictures or perforation). * **Drug of Choice for Acute Bleed:** Octreotide or Terlipressin (Pharmacological management).

Q: What is the most common site of rupture of an Abdominal Aortic Aneurysm?

Laterally into the left retroperitoneum. **Explanation:** The most common site of rupture for an Abdominal Aortic Aneurysm (AAA) is **laterally into the left retroperitoneum**. **1. Why the Left Retroperitoneum?** The abdominal aorta is a retroperitoneal structure located slightly to the left of the midline. Anatomically, the left posterolateral wall of the aorta is the most common site of wall stress and subsequent rupture. When it ruptures here, the hemorrhage is initially contained by the retroperitoneal space. This "containment" is clinically significant because it may result in a temporary tamponade effect, allowing the patient to survive long enough to reach the hospital (presenting with the classic triad of pain, hypotension, and a pulsatile mass). **2. Analysis of Incorrect Options:** * **Option B:** The aorta lies to the left of the IVC; therefore, a right-sided rupture is anatomically less frequent. * **Option C:** While posterior ruptures occur, the lateral/posterolateral direction is the path of least resistance compared to the dense pre-vertebral fascia. * **Option D:** **Intraperitoneal rupture** (Anterior) is the second most common site. Unlike retroperitoneal ruptures, these are not contained, leading to massive exsanguination and sudden death before reaching medical care. **3. NEET-PG High-Yield Pearls:** * **Classic Triad:** Hypotension, back/abdominal pain, and a pulsatile abdominal mass (present in only ~25-50% of cases). * **Most common site of AAA:** Infrarenal (below the origin of renal arteries). * **Screening:** Ultrasound is the investigation of choice for screening; CT Angiography is the gold standard for surgical planning. * **Surgical Threshold:** Repair is generally indicated if the diameter is **>5.5 cm in men** or **>5.0 cm in women**, or if it grows >0.5 cm in 6 months.

Q: What is the recommended treatment for acute lymphangitis?

Antibiotics and rest. **Explanation:** **Acute Lymphangitis** is a bacterial infection (most commonly caused by **Streptococcus pyogenes**) of the peripheral lymphatic channels. It typically presents as painful, red, linear streaks extending from a site of infection toward regional lymph nodes. **Why Option A is Correct:** The primary management is medical, not surgical. Since the underlying cause is almost always a pyogenic bacterial infection, **systemic antibiotics** (usually targeting Gram-positive cocci, such as penicillin or cephalosporins) are the mainstay of treatment. **Rest and elevation** of the affected limb help reduce edema and promote lymphatic drainage, preventing further spread of the infection. **Why the Other Options are Incorrect:** * **Option B (Lymphangiography):** This is a diagnostic imaging modality used to visualize lymphatic vessels. It is contraindicated in acute infection as it can worsen the inflammation and spread the pathogen. * **Option C (Multiple Incisions):** Acute lymphangitis is a non-suppurative spreading infection. Incisions are contraindicated unless a localized abscess has formed. Premature surgery can lead to non-healing wounds or secondary infection. * **Option D (No treatment):** Untreated lymphangitis can rapidly progress to bacteremia, sepsis, and death. **Clinical Pearls for NEET-PG:** * **Most common organism:** *Streptococcus pyogenes* (Group A Strep). * **Classic sign:** Red streaks ("blood poisoning" in lay terms) with associated painful regional lymphadenopathy. * **Differential Diagnosis:** Do not confuse with **thrombophlebitis** (which presents with a palpable cord and no red streaks). * **Complication:** If neglected, it can lead to **abscess formation** or **septicaemia**.

Question 1

The Brodie-Trendelenburg test is performed to assess for which condition?

Accepted Answer

Sapheno-femoral incompetence

Answer

Deep vein thrombosis

Answer

Varicose veins

Answer

Superficial migratory thrombophlebitis

Question 2

A 57-year-old female presented with shoe-claudication. Peripheral aneurysm was suspected. Which of the following is the most common site of peripheral aneurysm?

Accepted Answer

Popliteal artery

Answer

Femoral artery

Answer

Radial artery

Answer

Brachial artery

Question 3

Most commonly, varicose veins are seen with which of the following?

Accepted Answer

Long saphenous vein

Answer

Short saphenous vein

Answer

Both

Answer

Popliteal and femoral vein

Question 4

What is the gold standard investigation of choice for deep vein thrombosis?

Accepted Answer

Venography

Answer

Double contrast duplex

Answer

CT scan

Answer

MRI

Question 5

Which of the following is NOT included in the treatment of femoral artery aneurysm?

Accepted Answer

CT scan

Answer

Ultrasound guided compression of the neck of the aneurysm

Answer

Thrombin injection

Answer

Bypass graft repair

Question 6

Which of the following is NOT an indication for surgical repair of a symptomatic, unruptured aneurysm?

Accepted Answer

Aneurysm size less than 5 cm

Answer

Painful, tender aneurysm

Answer

Thrombosed aneurysm

Answer

Growth rate more than 5.5 cm per year

Question 7

Which one of the following reagents is not used as a sclerosant in the treatment of bleeding varices?

Accepted Answer

Ethyl alcohol

Answer

Ethanolamine oleate

Answer

Phenol

Answer

Sodium morrhuate

Question 8

What is the most common site of rupture of an Abdominal Aortic Aneurysm?

Accepted Answer

Laterally into the left retroperitoneum

Answer

Laterally into the right retroperitoneum

Answer

Posteriorly into the posterior retroperitoneum

Answer

Anteriorly into the peritoneum (intraperitoneal)

Question 9

What is the recommended treatment for acute lymphangitis?

Accepted Answer

Antibiotics and rest

Answer

Immediate lymphangiography

Answer

Immediate multiple incisions

Answer

No special treatment

Question 10

Which of the following is NOT true about thoracic outlet syndrome?

Accepted Answer

The lower trunks of the brachial plexus are commonly affected.

Answer

Adson's test is used for diagnosis.

Answer

It may be caused by a cervical rib.

Answer

Pain, numbness, and paresthesia in the involved extremity occur.

Vascular Surgery — MCQs

Vascular Surgery — MCQs

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