Vascular Surgery

Vascular Surgery Indian Medical PG Question 1: Bullet wounds near major blood vessels should be explored only if -

• A. The wound is in close proximity to a major blood vessel
• B. There is any suspicion of possible vascular involvement
• C. Routine exploration is indicated for all penetrating wounds near vessels
• D. There are hard signs of vascular injury (active hemorrhage, expanding hematoma, absent distal pulses, palpable thrill/bruit) (Correct Answer)

Vascular Surgery Explanation: ***There are hard signs of vascular injury (active hemorrhage, expanding hematoma, absent distal pulses, palpable thrill/bruit)*** - **Hard signs** indicate a high likelihood of significant vascular trauma requiring immediate surgical exploration to prevent severe complications such as limb ischemia or exsanguination. - These signs include **active pulsatile hemorrhage**, rapidly **expanding hematoma**, **absent or diminished distal pulses**, presence of a **thrill or bruit**, and **signs of distal ischemia**. *The wound is in close proximity to a major blood vessel* - Proximity alone is a **soft sign** of vascular injury and warrants further investigation, but not immediate routine surgical exploration. - Many wounds near major vessels do not result in vascular injury; direct exploration without other indications would lead to unnecessary surgeries. *There is any suspicion of possible vascular involvement* - **Suspicion** would prompt diagnostic imaging (e.g., CT angiography) or observation, but not an immediate surgical exploration unless hard signs are present. - Suspicions can be based on soft signs such as a stable hematoma, history of significant bleeding at the scene, or bony injury near a vessel. *Routine exploration is indicated for all penetrating wounds near vessels* - **Routine exploration** of all penetrating wounds near vessels is not recommended as it carries risks of iatrogenic injury and surgical complications, and many such wounds do not involve vascular damage. - Clinical guidelines emphasize selective management based on signs and symptoms, differentiating between hard and soft signs of injury to guide intervention.

Vascular Surgery Indian Medical PG Question 2: ABPI increases artificially in

• A. Ischemic limb ulcers
• B. Intermittent claudication syndrome
• C. Deep vein thrombosis (DVT)
• D. Conditions causing arterial calcification (Correct Answer)

Vascular Surgery Explanation: ***Conditions causing arterial calcification*** - In cases of **arterial calcification**, particularly in conditions like **diabetes** and **chronic kidney disease**, the blood vessels become stiff and non-compressible. - This stiffness leads to falsely elevated ankle systolic pressures because the cuff cannot effectively compress the calcified arteries, resulting in an artificially high **Ankle-Brachial Pressure Index (ABPI)** reading [2]. *Ischemic limb ulcers* - **Ischemic limb ulcers** are a direct consequence of **peripheral artery disease (PAD)**, which is characterized by reduced blood flow to the extremities [2]. - In these conditions, the ABPI would be **decreased** (typically < 0.9), indicating impaired blood supply, not an increase [2]. *Intermittent claudication syndrome* - **Intermittent claudication** is a classic symptom of **peripheral artery disease (PAD)**, where pain occurs in the legs during exercise due to insufficient blood flow [1]. - This syndrome is associated with a **reduced ABPI**, as arterial narrowing limits oxygen delivery to the muscles during exertion [1]. *Deep vein thrombosis (DVT)* - **Deep vein thrombosis (DVT)** is a condition involving a blood clot in a deep vein, typically in the legs. - DVT does not directly cause an artificial increase in ABPI; it primarily affects venous return and can cause swelling and pain, but not elevated arterial pressure readings [2].

Vascular Surgery Indian Medical PG Question 3: Which of the following is the best in-vivo screening choice for carotid artery stenosis?

• A. Digital Subtraction Angiography (DSA)
• B. CT
• C. MRI
• D. USG (Correct Answer)

Vascular Surgery Explanation: ***USG*** - **Ultrasound** (USG), specifically **carotid duplex ultrasonography**, is the **safest**, most cost-effective, and readily available initial screening tool for carotid artery stenosis due to its non-invasive nature and ability to visualize blood flow and vessel morphology. - It combines **B-mode imaging** with **Doppler flow analysis** to provide real-time images and flow velocity measurements, allowing for assessment of the degree of **stenosis** and plaque characteristics without radiation or contrast agents. - Sensitivity and specificity exceed 85-90% for detecting significant stenosis, making it the preferred first-line screening modality. *Digital Subtraction Angiography (DSA)* - **DSA** is the **gold standard** for anatomical detail and remains the most accurate method for quantifying carotid stenosis, but it is **invasive** and requires arterial catheterization. - It involves **ionizing radiation** and **iodinated contrast agents**, carrying risks of stroke (0.5-1%), arterial dissection, nephrotoxicity, and contrast allergic reactions. - Due to its invasive nature and associated risks, DSA is reserved for **pre-surgical planning** or when non-invasive imaging is inconclusive, not for initial screening. *CT* - **Computed tomography angiography (CTA)** involves **ionizing radiation** and typically requires an **iodinated contrast agent**, which carries risks of allergy and nephrotoxicity. - Though CTA provides excellent anatomical detail and can visualize vessel wall calcification, it is generally reserved for confirmation or surgical planning rather than initial screening due to its higher cost, radiation exposure, and contrast-related risks. *MRI* - **Magnetic resonance angiography (MRA)** can visualize carotid arteries well but is more expensive, less accessible than ultrasound, and may require a **gadolinium-based contrast agent**, which can have adverse effects (nephrogenic systemic fibrosis in renal impairment). - It is often used when ultrasound findings are equivocal or in cases where CTA is contraindicated, but it's not the preferred initial screening method due to its complexity, cost, longer examination time, and contraindications (pacemakers, metallic implants).

Vascular Surgery Indian Medical PG Question 4: Assertion: ACE inhibitors are contraindicated in bilateral renal artery stenosis. Reason: They cause acute kidney injury by reducing efferent arteriolar tone.

• A. A true R false
• B. Both A & R true, R explains A (Correct Answer)
• C. Both A & R true, R doesn't explain A
• D. A false R true

Vascular Surgery Explanation: ***Correct: Both A & R true, R explains A*** - **Assertion is TRUE**: ACE inhibitors are absolutely contraindicated in bilateral renal artery stenosis due to risk of acute kidney injury - **Reason is TRUE**: In bilateral renal artery stenosis, the kidneys depend on **angiotensin II** to maintain GFR by constricting the efferent arteriole - **R explains A**: ACE inhibitors block angiotensin II production → **efferent arteriolar dilation** → drastically reduced GFR → **acute kidney injury (AKI)** - This direct mechanistic link makes the reason a complete explanation of the assertion *Incorrect: A true R false* - While the assertion is true, the reason is also **true** (not false) - ACE inhibitors do reduce efferent arteriolar tone by blocking angiotensin II - This is the precise mechanism causing AKI in these patients *Incorrect: Both A & R true, R doesn't explain A* - Both statements are indeed true, but this option is incorrect because the reason **does explain** the assertion - The mechanism (reduced efferent arteriolar tone → decreased GFR) directly explains why ACE inhibitors are contraindicated - The causal relationship is clear and direct *Incorrect: A false R true* - The assertion is **true**, not false - ACE inhibitors are definitively contraindicated in bilateral renal artery stenosis - This is a well-established clinical contraindication to prevent renal failure

Vascular Surgery Indian Medical PG Question 5: Which imaging and Doppler techniques are combined in duplex ultrasonography?

• A. B-mode imaging and pulse-wave Doppler examination (Correct Answer)
• B. M-mode imaging and power Doppler examination
• C. M-mode imaging and waveform analysis
• D. A-mode imaging and pulse-wave Doppler examination

Vascular Surgery Explanation: ***B-mode imaging and pulse-wave Doppler examination*** - **B-mode imaging** provides a real-time, two-dimensional grayscale image of the vessel structure. - **Pulse-wave Doppler** assesses blood flow direction, velocity, and characteristics within the visualized vessel. *M-mode imaging and power Doppler examination* - **M-mode imaging** is primarily used for visualizing moving structures over time (e.g., cardiac valves), not for detailed vessel anatomy. - **Power Doppler** is sensitive to the presence of blood flow but does not provide information on flow direction or velocity, which is crucial for full duplex ultrasound. *M-mode imaging and waveform analysis* - **M-mode imaging** is not the primary imaging modality for evaluating vascular structures in duplex ultrasonography. - While waveform analysis is part of Doppler interpretation, combining it with M-mode imaging does not constitute duplex ultrasonography. *A-mode imaging and pulse-wave Doppler examination* - **A-mode imaging** represents echoes as spikes on a single line, providing limited anatomical information and is not used for vascular assessment. - Although pulse-wave Doppler is a component, the primary imaging mode is incorrect for duplex ultrasonography.

Vascular Surgery Indian Medical PG Question 6: Which of the following is the best management for radiation induced occlusive disease of carotid artery?

• A. Carotid endarterectomy
• B. Low dose aspirin
• C. Carotid bypass procedure
• D. Carotid angioplasty and stenting (Correct Answer)

Vascular Surgery Explanation: ***Carotid angioplasty and stenting*** - **Radiation-induced carotid artery disease** often involves the distal part of the carotid artery, making it less amenable to surgical endarterectomy. - **Angioplasty and stenting** offer a less invasive approach with good technical success in these challenging cases, especially given the increased fragility and fibrosis of radiated tissues. *Carotid endarterectomy* - **Carotid endarterectomy** in previously radiated fields is associated with a significantly higher risk of complications, including **cranial nerve injury**, **wound infection**, and **carotid artery rupture**, due to tissue fibrosis and scarring. - The disease often extends beyond the easily accessible segment for endarterectomy in radiation-induced cases. *Low dose aspirin* - **Low-dose aspirin** is an important component of medical therapy for **atherosclerotic disease** and **stroke prevention**, but it is insufficient as a sole treatment for symptomatic or high-grade occlusive disease of the carotid artery. - It helps manage the underlying **atherosclerotic process** but does not directly address the severe stenosis or occlusion. *Carotid bypass procedure* - **Carotid bypass procedures** are complex surgical interventions usually reserved for cases of **carotid artery occlusion** or **recurrent stenosis** after previous interventions where endarterectomy or stenting is not feasible. - While an option, it is more invasive and technically demanding than angioplasty and stenting, particularly in already radiated tissues with compromised vascular integrity.

Vascular Surgery Indian Medical PG Question 7: A 55-year-old male, known smoker, complains of calf pain while walking. He experiences calf pain while walking but can continue walking with effort. Which grade of claudication does this patient fall under?

• A. Grade I (Mild claudication)
• B. Grade II (Moderate claudication) (Correct Answer)
• C. Grade III (Severe claudication)
• D. Grade IV (Ischemic rest pain)

Vascular Surgery Explanation: ***Grade II (Moderate claudication)*** - **Grade II claudication** is characterized by **intermittent claudication** where the patient experiences pain while walking but can **continue walking with effort**. - This level of claudication reflects a moderate degree of peripheral arterial disease, where blood flow is sufficiently compromised to cause pain with exertion but not severe enough to force immediate cessation of activity. - The patient in this scenario can continue ambulation despite discomfort, which is the defining feature of this grade. *Grade I (Mild claudication)* - **Grade I claudication** involves discomfort or pain that the patient can **tolerate without significantly altering their gait or pace**. - In this stage, the pain is minimal, and the patient may perceive it as a dull ache or mild fatigue rather than true pain. - Walking can continue without significant effort or limitation. *Grade III (Severe claudication)* - **Grade III claudication** is marked by pain that is **severe enough to stop the patient from walking within a short distance** (typically less than 200 meters). - The pain forces the patient to rest and recover before they can resume walking. - This represents significant functional limitation in daily activities. *Grade IV (Ischemic rest pain)* - **Grade IV**, also known as **critical limb ischemia**, involves **pain even at rest**, especially in the feet or toes, often worsening at night when the limb is elevated. - This stage indicates severe arterial obstruction and is frequently associated with **ulcers, non-healing wounds, or gangrene**. - This represents advanced peripheral arterial disease requiring urgent intervention. **Note:** This grading system is a simplified clinical classification. The standard medical classifications for peripheral arterial disease are the **Fontaine classification** (Stages I-IV) and **Rutherford classification** (Categories 0-6).

Vascular Surgery Indian Medical PG Question 8: Post op pulmonary complications are seen/expected in all except:

• A. BMI>30 (Correct Answer)
• B. Upper abdominal surgery
• C. Patient with 7 pack years of smoking
• D. Age >70

Vascular Surgery Explanation: ***BMI>30*** - While high BMI (obesity) is generally a **risk factor** for many surgical complications, a BMI *above 30* is specifically listed as a risk factor for **postoperative pulmonary complications**, making this statement incorrect in the context of the question which asks for the *exception*. - **Obesity** can lead to reduced lung volumes, increased work of breathing, and a higher incidence of **obstructive sleep apnea**, all predisposing to pulmonary issues postoperatively. *Upper abdominal surgery* - **Upper abdominal surgery** is associated with a significantly increased risk of postoperative pulmonary complications due to proximity to the diaphragm and pain-induced shallow breathing. - This type of surgery can lead to **atelectasis**, **pneumonia**, and **respiratory failure** by impairing normal respiratory mechanics and cough reflex. *Patient with 7 pack years of smoking* - A history of **smoking**, even for 7 pack-years, is a well-established risk factor for postoperative pulmonary complications due to its detrimental effects on airway clearance and lung function. - Smoking causes **bronchial hyperreactivity**, **increased mucus production**, and impaired ciliary function, increasing the risk of **bronchitis**, **pneumonia**, and **atelectasis**. *Age >70* - **Advanced age**, particularly over 70 years, is a significant independent risk factor for postoperative pulmonary complications. - Older patients often have **decreased lung elasticity**, reduced respiratory muscle strength, and a higher prevalence of **comorbidities**, all contributing to impaired pulmonary reserve and increased susceptibility to complications.

Vascular Surgery Indian Medical PG Question 9: In the damage control resuscitation protocol, which location is primarily focused on correcting physiological derangements after initial hemorrhage control?

• A. In OT
• B. Prehospital resuscitation
• C. In emergency
• D. In ICU (Correct Answer)

Vascular Surgery Explanation: ***In ICU*** - The **Intensive Care Unit (ICU)** is the primary location for correcting physiological derangements in the damage control resuscitation protocol after initial hemorrhage control. - This phase focuses on addressing the **"deadly triad"** of **acidosis**, **hypothermia**, and **coagulopathy** to stabilize the patient before definitive surgical repair. - The ICU provides the controlled environment and resources needed for prolonged resuscitation and physiological optimization. *In OT* - The **Operating Theater (OT)** is where initial hemorrhage control and damage control surgery are performed. - While some resuscitation occurs here, the main focus is on stopping bleeding and controlling contamination, not prolonged physiological correction. - The goal is rapid surgical intervention followed by transfer to ICU. *Prehospital resuscitation* - **Prehospital resuscitation** involves immediate life-saving interventions and rapid transport. - It prioritizes hemorrhage control, airway management, and preventing hypothermia, but lacks the resources for comprehensive physiological correction. - The focus is on rapid transport to definitive care. *In emergency* - The **Emergency Department (ED)** is crucial for initial assessment, rapid transfusion, and preparing the patient for surgery. - However, the ED phase is typically focused on rapid stabilization and transfer for definitive care rather than protracted physiological correction. - It serves as a bridge between prehospital care and the operating room.

Vascular Surgery Indian Medical PG Question 10: What is the treatment for most cases of blunt trauma to the kidney?

• A. Conservative (Correct Answer)
• B. Nephrectomy
• C. Nephrotomy
• D. Nephroplexy

Vascular Surgery Explanation: ***Conservative*** - The majority of kidney injuries resulting from **blunt trauma** are low-grade (Grades I-III) and can be successfully managed with **conservative (non-operative) methods**. - This typically involves bed rest, careful monitoring of vital signs and urine output, hydration, and serial imaging to ensure stability and healing of the kidney. *Nephrectomy* - **Nephrectomy** (surgical removal of the kidney) is generally reserved for severe, high-grade kidney injuries (Grades IV-V) that are life-threatening or cannot be controlled by other means. - Indications include uncontrollable hemorrhage, extensive renal parenchymal destruction, or a non-viable kidney. *Nephrotomy* - **Nephrotomy** is an incision into the kidney, often performed for stone removal or to drain an abscess, but it is not a primary treatment for blunt traumatic kidney injury. - While surgical repair (nephrorrhaphy) may sometimes be indicated for high-grade injuries to preserve the kidney, a simple nephrotomy is not the standard approach. *Nephroplexy* - **Nephroplexy** is a surgical procedure to fix a prolapsed or "floating" kidney (nephroptosis), which is an entirely different condition from traumatic injury. - This procedure aims to secure the kidney in its normal anatomical position and is not indicated for kidney trauma.

Vascular Surgery Flashcard 1 of 10

Question: Which is the best graft for a femoropopliteal bypass?_____

Answer: GSV

Vascular Surgery Flashcard 2 of 10

Question: According to the 2020 update of CEAP classification, varicose veins are classified as _____

Answer: C2

Vascular Surgery Flashcard 3 of 10

Question: _____ is a slow-growing, tortuous swelling that develops due to abnormal arteriovenous connections among the subcutaneous blood vessels

Answer: Cirsoid aneurysm

Vascular Surgery Flashcard 4 of 10

Question: Most common sites for peripheral aneurysms include _____ artery

Answer: popliteal

Vascular Surgery Flashcard 5 of 10

Question: Abdominal aortic aneurysm (AAA) of size less than _____ cm have no risk of rupture.

Answer: 4

Vascular Surgery Flashcard 6 of 10

Question: The most common peripheral aneurysm is the _____ aneurysm

Answer: popliteal

Vascular Surgery Flashcard 7 of 10

Question: The _____ internal mammary artery (left internal thoracic artery) is the preferred vessel for coronary artery bypass grafting (CABG)

Answer: left

Vascular Surgery Flashcard 8 of 10

Question: Abdominal aortic aneurysm rupture presents with a triad of _____, a pulsatile abdominal mass, and flank pain

Answer: hypotension

Vascular Surgery Flashcard 9 of 10

Question: Treatment of Moyamoya disease: Surgical bypass of _____ arteries to the dura or middle cerebral artery

Answer: extracranial carotid

Vascular Surgery Flashcard 10 of 10

Question: _____ mesenteric ischemia may occur due to a thrombotic or embolic occlusion of the superior mesenteric artery

Answer: Acute