Vascular Surgery — MCQs
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A patient complains of leg pain along with cramps and pruritus. On physical examination, visible limb veins are noticed. For further evaluation a test is conducted which is shown in the image. All are the possible sites for performing this test except:
Comment on image $A$ and $B$.
Identify the ulcer types shown in images A and B.
Which is the most common site of peripheral aneurysm?
A patient has developed a disease shown below after receiving neck irradiation. Which is the best management for the patient?
Vascular Surgery US Medical PG Practice Questions and MCQs
Question 1: A patient complains of leg pain along with cramps and pruritus. On physical examination, visible limb veins are noticed. For further evaluation a test is conducted which is shown in the image. All are the possible sites for performing this test except:
- A. Saphenofemoral junction
- B. Above the knee level
- C. Below the knee level
- D. Below the ankle (Correct Answer)
- E. Mid-thigh level
Explanation: ***Below the ankle*** - The **Trendelenburg test (Perth test)** is used to assess venous valvular incompetence in the lower limb, specifically in the great saphenous vein and its tributaries. - The test involves the use of a **tourniquet** to occlude blood flow, and the primary purpose is to identify points of venous reflux, which are typically found **above the ankle**, along the course of the saphenous veins and perforators. - Applying a tourniquet **below the ankle** would not be useful for assessing saphenous vein competence, as the major superficial veins being tested lie above this level. *Saphenofemoral junction* - The saphenofemoral junction is a key site for incompetence in **varicose veins**, and the Trendelenburg test is designed to assess reflux at this junction. - Applying pressure or a tourniquet just below this junction helps differentiate between incompetence at the junction and incompetence of distal perforators. *Above the knee level* - The Trendelenburg test commonly involves applying a **tourniquet above the knee** to isolate the saphenofemoral junction and assess for reflux. - This position helps in determining whether the incompetence is primarily at the saphenofemoral junction or involves the perforating veins in the thigh. *Mid-thigh level* - A tourniquet can be applied at the **mid-thigh level** to evaluate the competence of perforating veins in the thigh region. - This helps localize the level of venous incompetence and determine whether multiple segments of the saphenous system are affected. *Below the knee level* - A tourniquet is also applied **below the knee** during the Trendelenburg test to evaluate competence of the perforating veins in the calf. - This helps differentiate between deep vein incompetence and superficial vein incompetence due to perforator issues.
Question 2: Comment on image $A$ and $B$.
- A. A = Arterial ulcer and B = Venous ulcer
- B. A = Neuropathic ulcer and B = Arterial ulcer
- C. A = Venous ulcer and B = Neuropathic ulcer
- D. A = Venous ulcer and B = Ischemic ulcer (Correct Answer)
- E. A = Neuropathic ulcer and B = Venous ulcer
Explanation: ***A = Venous ulcer and B = Ischemic ulcer*** - Image A shows a **venous ulcer**, characterized by its typical location around the **ankle/malleolus**, an **irregular shape**, a **reddish, beefy granulation tissue** base, and surrounding **hyperpigmentation** and **lipodermatosclerosis** (fibrotic, hardened skin). - Image B depicts an **ischemic (arterial) ulcer**, which is usually found on the **toes** or **pressure points**, has a **"punched-out" appearance** with well-defined borders, a **pale or necrotic base**, and surrounding skin often appears **pale, cool, and hairless** due to poor circulation. *A = Arterial ulcer and B = Venous ulcer* - This is incorrect because Image A's features (irregular shape, granulation tissue, hyperpigmentation) are classic for a **venous ulcer**, not an arterial ulcer. - Image B's characteristics (toes involved, pale color, potentially necrotic tissue) are consistent with an **ischemic/arterial ulcer**, not a venous ulcer. *A = Neuropathic ulcer and B = Arterial ulcer* - This is incorrect. While Image B does show an **arterial ulcer**, Image A does not show a neuropathic ulcer. - **Neuropathic ulcers** typically occur on the **plantar surface of the foot or over bony prominences**, are often painless, and have a calloused rim, which is not clearly visible in Image A. *A = Venous ulcer and B = Neuropathic ulcer* - This is incorrect. Image A accurately represents a **venous ulcer**, but Image B does not represent a neuropathic ulcer. - The appearance of Image B, with its location on the toes and potential necrosis, is more indicative of an **ischemic rather than a neuropathic etiology**. *A = Neuropathic ulcer and B = Venous ulcer* - This is incorrect on both counts. Image A does not show features of a **neuropathic ulcer** (which would be on plantar surface with calloused rim). - Image B is an **ischemic/arterial ulcer**, not a venous ulcer, as evidenced by the toe location, punched-out appearance, and pale/necrotic tissue.
Question 3: Identify the ulcer types shown in images A and B.
- A. A=Venous ulcer and B=Ischemic ulcer (Correct Answer)
- B. A=Arterial ulcer and B=Venous ulcer
- C. A=Neuropathic ulcer and B=Arterial ulcer
- D. A=Venous ulcer and B=Neuropathic ulcer
- E. A=Arterial ulcer and B=Arterial ulcer
Explanation: ***A=Venous ulcer and B=Ischemic ulcer*** - Image A depicts a **venous ulcer**, characterized by its irregular shape, shallow appearance, and presence of **granulation tissue** and **fibrin**, typically found on the medial aspect of the ankle or lower leg. The surrounding skin may show signs of **venous stasis changes** like hyperpigmentation and edema. - Image B illustrates an **ischemic (arterial) ulcer**, which is usually found on the **toes**, **heels**, or other pressure points; it is often **punched out**, pale, and may have **necrotic tissue** due to poor arterial blood supply. The surrounding skin appears shiny, hairless, and cool, indicative of **peripheral artery disease**. *A=Arterial ulcer and B=Venous ulcer* - This option is incorrect because the ulcer in image A shows characteristics more consistent with a **venous ulcer** (irregular, granulating, superficial). - The ulcer in image B presents features typical of an **ischemic ulcer** (punched-out, potentially necrotic, on distal parts). *A=Neuropathic ulcer and B=Arterial ulcer* - Image A does not display the classic features of a **neuropathic ulcer**, which are often found on **pressure points** of the foot, are painless, and have a "punched-out" appearance with a callus rim. - Image B could be an arterial ulcer, but the classification of A is incorrect, making the entire option wrong. *A=Venous ulcer and B=Neuropathic ulcer* - While image A correctly identifies as a **venous ulcer**, image B's characteristics, such as distal location, pallor, and potential necrosis, point more towards an **ischemic (arterial) origin** rather than a neuropathic one. - A neuropathic ulcer would typically be on a pressure point of the sole and often surrounded by a callous. *A=Arterial ulcer and B=Arterial ulcer* - Image A is not an arterial ulcer; it lacks the **punched-out appearance**, **pale base**, and **distal location** typical of arterial insufficiency. - The irregular borders, granulation tissue, and typical venous stasis location indicate this is a **venous ulcer**. - While image B is indeed an arterial ulcer, the misclassification of A makes this option incorrect.
Question 4: Which is the most common site of peripheral aneurysm?
- A. A
- B. B (Correct Answer)
- C. C
- D. D
- E. E
Explanation: ***Option B*** - This image points to the **popliteal artery**, which is the most common site for **peripheral aneurysms**. - **Popliteal artery aneurysms** account for approximately 70% of all peripheral aneurysms and are more common in men. *Option A* - This image points to the **brachial artery** in the upper arm, which is a less common site for aneurysms. - While aneurysms can occur here, they are not as frequent as in the popliteal artery. *Option C* - This image points to the **femoral artery** in the groin region. - Although the femoral artery can be affected by aneurysms, they are less common than popliteal artery aneurysms. *Option D* - This image points to the **tibial arteries** in the lower leg. - Aneurysms in the tibial arteries are rare and typically much less common than those in the popliteal artery. *Option E* - This image points to the **radial artery** in the forearm. - Radial artery aneurysms are very rare and usually occur secondary to trauma or iatrogenic injury, not spontaneously like popliteal aneurysms.
Question 5: A patient has developed a disease shown below after receiving neck irradiation. Which is the best management for the patient?
- A. Low dose Aspirin
- B. Carotid angioplasty and stenting
- C. Carotid endarterectomy (Correct Answer)
- D. Carotid bypass procedure
- E. Anticoagulation therapy
Explanation: ***Carotid endarterectomy*** - The image depicts **carotid artery stenosis**, likely from **atherosclerosis**, in a patient who received neck irradiation. **Carotid endarterectomy** is the gold standard for symptomatic or severe asymptomatic carotid stenosis. - Neck irradiation often causes **accelerated atherosclerosis** and fibrosis, making the vessels brittle and prone to complications with endovascular procedures like stenting. *Low dose Aspirin* - **Low-dose aspirin** is an antiplatelet medication and plays a role in the **secondary prevention** of atherosclerotic events, but it is insufficient as a primary management for advanced, symptomatic carotid stenosis requiring revascularization. - While important for reducing the risk of stroke, it does not directly address the **physical obstruction** caused by severe stenosis. *Carotid angioplasty and stenting* - **Carotid angioplasty and stenting** are generally considered less favorable than endarterectomy in patients with **post-irradiation carotid stenosis** due to reported higher rates of perioperative strokes, restenosis, and cranial nerve injuries. - The **fibrotic and calcified nature** of post-irradiation vessels makes them less amenable to PTA and stenting, increasing procedural risks. *Carotid bypass procedure* - **Carotid bypass** is a more complex surgical procedure generally reserved for situations where the carotid artery is extensively diseased, occluded, or unsuitable for endarterectomy, or if there's a need to bypass a segment following tumor resection. - It is not typically the **first-line treatment** for primary atherosclerotic stenosis amenable to endarterectomy. *Anticoagulation therapy* - **Anticoagulation** (e.g., warfarin, DOACs) is not indicated for the primary management of **carotid artery stenosis**, which is an atherosclerotic obstructive disease rather than a thromboembolic disorder. - Anticoagulation does not address the underlying **stenotic lesion** and may increase bleeding risk, particularly in the perioperative setting if surgical intervention becomes necessary.
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