Vascular Surgery Practice Questions

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.

Q: Intermittent claudication is seen when the ankle-brachial index is?

0.5-0.9. The **Ankle-Brachial Index (ABI)** is the ratio of the systolic blood pressure at the ankle to the systolic blood pressure in the arm. It is the gold-standard bedside screening tool for Peripheral Arterial Disease (PAD). ### **Why 0.5–0.9 is Correct** An ABI between **0.5 and 0.9** indicates mild-to-moderate arterial insufficiency. At this stage, blood flow is sufficient at rest but becomes inadequate during exercise when metabolic demands of the muscles increase. This leads to **intermittent claudication**—muscle pain (usually in the calf) that occurs during walking and is relieved by rest. ### **Analysis of Incorrect Options** * **A. 0.9–1.0:** This is considered the **low-normal** range. While it may indicate very early disease, patients are typically asymptomatic. * **B. 1.1 (or >1.3):** An ABI >1.3 suggests **non-compressible, calcified vessels**. This is commonly seen in patients with long-standing Diabetes Mellitus or Chronic Kidney Disease (Monckeberg’s medial sclerosis), rendering the ABI unreliable. ### **High-Yield NEET-PG Pearls** * **Normal ABI:** 1.0–1.2. * **Best Initial Test for PAD:** ABI. * **Gold Standard Investigation:** Digital Subtraction Angiography (DSA). * **Treadmill Test:** If a patient has classic claudication symptoms but a normal resting ABI, perform a post-exercise ABI (a drop of >15-20% is diagnostic). * **Toe-Brachial Index (TBI):** Used when ABI is unreliable (>1.3) because digital arteries are rarely calcified. A TBI <0.7 is abnormal.

Q: A 70-year-old woman with a history of myocardial ischemia and peripheral vascular disease presented with sudden onset of severe, rapidly increasing epigastric pain, nausea, vomiting, and minimal abdominal tenderness. She was writhing in pain, had normal bowel sounds, and a small amount of blood in her stool. Electrolyte analysis revealed a bicarbonate level of 15 mEq/L, and serum lactate was elevated, indicating tissue hypoxia and injury. A CT scan was planned. What anatomical structure is likely involved?

C. ***C (Superior Mesenteric Artery)*** - The **pain out of proportion to physical findings** with **elevated lactate** and **metabolic acidosis** (bicarbonate 15 mEq/L) are classic for **acute mesenteric ischemia** affecting the SMA territory. - Patient's history of **myocardial ischemia** and **peripheral vascular disease** are significant risk factors for **mesenteric arterial thrombosis** or embolism, with the SMA being most commonly affected due to its anatomy and flow characteristics. *A (Celiac Artery)* - Celiac artery occlusion typically causes **chronic mesenteric ischemia** with **postprandial pain** and **weight loss**, not acute presentation. - The **extensive collateral circulation** from the celiac trunk usually prevents acute ischemic symptoms unless there's concurrent SMA involvement. *B (Inferior Mesenteric Artery)* - IMA territory ischemia rarely presents with **severe acute symptoms** due to **abundant collateral circulation** from the middle colic and internal iliac arteries. - **Left-sided colonic ischemia** from IMA involvement typically presents with **left lower quadrant pain** and **bloody diarrhea**, not epigastric pain. *D (Portal Vein)* - **Portal vein thrombosis** presents with **gradual onset** of **ascites**, **splenomegaly**, and **variceal bleeding**, not acute severe abdominal pain. - **Elevated lactate** and **metabolic acidosis** are uncommon in portal vein thrombosis unless there's concurrent **bowel infarction** from arterial compromise.

Q: Which of the following describes stage 3 limb ischemia as per the Fontaine classification?

Rest pain. The **Fontaine classification** is a clinical tool used to stage the severity of Chronic Limb-Threatening Ischemia (CLTI) based on symptoms. ### **Explanation of the Correct Answer** **Stage 3** is characterized by **Rest Pain**. This occurs when the arterial supply is so severely compromised that it cannot meet the metabolic demands of the tissues even at rest. The pain is typically worse at night when the patient is supine (loss of gravity-assisted flow) and is often relieved by hanging the foot over the edge of the bed. ### **Analysis of Incorrect Options** * **Option A & B (Intermittent Claudication):** These represent **Stage 2**. In Fontaine’s system, Stage 2 is subdivided based on walking distance: * **Stage 2a:** Claudication distance > 200 meters (Well compensated). * **Stage 2b:** Claudication distance < 200 meters (Poorly compensated). * **Option D (Ischemic Ulcer):** This represents **Stage 4**, which involves trophic changes such as non-healing ulcers or gangrene. ### **High-Yield Facts for NEET-PG** * **Stage 1:** Asymptomatic (often identified by a reduced Ankle-Brachial Index). * **Critical Limb Ischemia (CLI):** Defined as Fontaine stages 3 and 4. * **Rutherford Classification:** An alternative 7-stage (0-6) system used in clinical trials that incorporates objective findings (e.g., treadmill tests). * **Clinical Pearl:** Rest pain usually signifies a systolic pressure < 50 mmHg at the ankle or < 30 mmHg at the toe. Always check for the "Buerger’s angle" (angle of circulatory insufficiency) during physical examination.

Q: A 56-year-old man has suffered from intermittent claudication for 5 years. He has recently developed cramping abdominal pain that is made worse by eating. He has a history of a 15-lb weight loss. What is the most likely diagnosis?

Chronic intestinal ischemia (intestinal angina). ### Explanation **1. Why the Correct Answer is Right:** The patient presents with the classic triad of **Chronic Intestinal Ischemia (Intestinal Angina)**: * **Postprandial abdominal pain:** Described as "cramping" and occurring shortly after eating (when the metabolic demand of the gut increases). * **Weight loss:** This is typically due to **"sitophobia"** (fear of eating) because the patient associates food with severe pain. * **Evidence of generalized atherosclerosis:** The 5-year history of intermittent claudication indicates systemic peripheral arterial disease (PAD), making mesenteric artery stenosis highly likely. **2. Why the Incorrect Options are Wrong:** * **Chronic cholecystitis:** While it causes postprandial pain, it is usually localized to the right upper quadrant and associated with fatty food intolerance, not significant systemic weight loss or generalized claudication. * **Esophageal diverticulum:** This typically presents with dysphagia, regurgitation of undigested food, and halitosis, rather than cramping abdominal pain triggered by the act of eating. * **Peptic ulcer:** Gastric ulcers cause postprandial pain, but the pain is usually burning in nature. While weight loss can occur, it does not explain the patient’s long-standing peripheral vascular disease (claudication). **3. NEET-PG High-Yield Pearls:** * **Vessels Involved:** Usually requires significant stenosis of at least **two out of the three** major visceral arteries (Celiac trunk, SMA, and IMA) due to extensive collateral circulation. * **Diagnosis:** The gold standard for diagnosis is **CT Angiography**. * **Management:** Revascularization (Endovascular stenting or surgical bypass) is the treatment of choice. * **Clinical Sign:** An abdominal bruit may be heard in approximately 50% of patients.

Q: What is the most common site of cerebral aneurysm?

Anterior communicating artery. Cerebral aneurysms, specifically **Saccular (Berry) aneurysms**, occur most frequently at the bifurcations of arteries within the Circle of Willis [1]. This is due to the inherent structural weakness in the tunica media at these branching points, combined with high hemodynamic stress. **1. Why Anterior Communicating Artery (A-Com) is correct:** The **Anterior Communicating Artery** is the most common site for berry aneurysms, accounting for approximately **30–35%** of all cases [1]. It is a high-yield fact for NEET-PG that the anterior circulation is far more commonly involved (approx. 85-90%) than the posterior circulation [1]. **2. Analysis of Incorrect Options:** * **Posterior Communicating Artery (P-Com):** This is the **second most common** site (approx. 30-35%). Clinically, P-Com aneurysms are classic for causing **3rd Cranial Nerve (Oculomotor) palsy** with pupillary involvement due to direct compression. * **Middle Cerebral Artery (MCA):** This is the third most common site (approx. 20%). MCA aneurysms typically occur at the first bifurcation in the Sylvian fissure. * **Posterior Circulation:** Sites like the Basilar artery tip are much rarer (approx. 10%). **Clinical Pearls for NEET-PG:** * **Rupture:** The most common cause of non-traumatic **Subarachnoid Hemorrhage (SAH)** [2]. * **Associations:** Berry aneurysms are strongly associated with **ADPKD** (Autosomal Dominant Polycystic Kidney Disease), Coarctation of the Aorta, and Ehlers-Danlos Syndrome. * **Presentation:** Often described as the "worst headache of life" (Thunderclap headache) [2]. * **A-Com Syndrome:** Rupture here can lead to bitemporal hemianopia (due to proximity to the optic chiasm) or personality changes [2].

Question 1

Acute vascular ischemia manifests as?

Accepted Answer

Pulselessness

Answer

Syncope

Answer

Flushing

Answer

Oedema

Question 2

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

Accepted Answer

Femoral

Answer

Radial

Answer

Brachial

Answer

Carotid

Question 3

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

Question 4

Intermittent claudication is seen when the ankle-brachial index is?

Accepted Answer

0.5-0.9

Answer

0.9-1.0

Answer

<0.3

Answer

>1.1

Question 5

Complications arising out of A-V fistula done for renal failure include the following EXCEPT?

Accepted Answer

Necrosis of the distal part

Answer

Infection

Answer

Thrombosis

Answer

High output cardiac failure

Question 6

A 45-year-old woman presents with right lower extremity swelling and multiple varicosities two months after undergoing cardiac catheterization via a right femoral approach. Examination reveals a bruit over the right groin. What is the most likely diagnosis?

Accepted Answer

Arteriovenous (AV) fistula

Answer

Femoral artery thrombosis

Answer

Superficial venous insufficiency

Answer

Pseudoaneurysm

Question 7

A 70-year-old woman with a history of myocardial ischemia and peripheral vascular disease presented with sudden onset of severe, rapidly increasing epigastric pain, nausea, vomiting, and minimal abdominal tenderness. She was writhing in pain, had normal bowel sounds, and a small amount of blood in her stool. Electrolyte analysis revealed a bicarbonate level of 15 mEq/L, and serum lactate was elevated, indicating tissue hypoxia and injury. A CT scan was planned. What anatomical structure is likely involved?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 8

Which of the following describes stage 3 limb ischemia as per the Fontaine classification?

Accepted Answer

Rest pain

Answer

Well compensated intermittent claudication

Answer

Poorly compensated intermittent claudication

Answer

Ischemic ulcer

Question 9

A 56-year-old man has suffered from intermittent claudication for 5 years. He has recently developed cramping abdominal pain that is made worse by eating. He has a history of a 15-lb weight loss. What is the most likely diagnosis?

Accepted Answer

Chronic intestinal ischemia (intestinal angina)

Answer

Chronic cholecystitis

Answer

Esophageal diverticulum

Answer

Peptic ulcer

Question 10

What is the most common site of cerebral aneurysm?

Accepted Answer

Anterior communicating artery

Answer

Posterior communicating artery

Answer

Middle cerebral artery

Answer

None of the above

Vascular Surgery — MCQs

Vascular Surgery — MCQs

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