Venous Interventions — MCQs
What is the main contraindication for performing a liver biopsy?
Assertion: Beta blockers improve survival in cirrhosis with varices. Reason: They reduce cardiac output and splanchnic blood flow.
Renal vein thrombosis is associated with all of the following conditions except:
The contraceptive which is contraindicated in DVT is?
Which of the following is true about the inferior vena cava (IVC)?
What is the purpose of pneumatic compression stockings?
Primary vascular access of choice in chronic kidney disease is:
Surgery in varicose veins is NOT attempted in the presence of which of the following?
Deep vein thrombosis most commonly occurs at which site?
Which article of the Indian Constitution allows the state to intervene in cases of hunger strikes to protect the right to life?
Venous Interventions Indian Medical PG Practice Questions and MCQs
Question 1: What is the main contraindication for performing a liver biopsy?
- A. Severe thrombocytopenia
- B. Liver hemangioma
- C. Presence of ascites
- D. Severe coagulopathy (Correct Answer)
Explanation: ***Severe coagulopathy*** - **Severe coagulopathy** is the main contraindication for liver biopsy due to a significantly increased risk of **hemorrhage** [1]. - A **prothrombin time (PT)** or **activated partial thromboplastin time (aPTT)** significantly prolonged beyond the normal range, or an **INR > 1.5**, should be corrected before the procedure [1]. *Severe thrombocytopenia* - While **thrombocytopenia** (platelet count <50,000/µL) does increase bleeding risk, it is often correctable with a **platelet transfusion** prior to biopsy, making it a relative rather than an absolute contraindication [1]. - The risk of major bleeding is typically lower with isolated thrombocytopenia compared to severe coagulopathy. *Liver hemangioma* - The presence of a **liver hemangioma** at the biopsy site is a contraindication as biopsying it can lead to massive hemorrhage. - However, if the biopsy can be performed safely away from the hemangioma, it is not an absolute contraindication to the procedure itself. *Presence of ascites* - **Ascites** can complicate a liver biopsy by increasing the risk of **peritoneal bleeding** and difficulty in targeting the liver [1]. - However, it is often manageable by draining the ascites or using imaging guidance, making it a relative contraindication rather than an absolute one [1].
Question 2: Assertion: Beta blockers improve survival in cirrhosis with varices. Reason: They reduce cardiac output and splanchnic blood flow.
- A. Both A & R true, R doesn't explain A
- B. Both A & R true, R explains A (Correct Answer)
- C. A true R false
- D. A false R true
Explanation: ***Both A & R true, R explains A*** - **Beta blockers** improve survival in patients with **cirrhosis and varices** by reducing the risk of **variceal bleeding**, a major cause of mortality [1]. - This is achieved by lowering **portal pressure** primarily through reducing **cardiac output** (beta-1 blockade) and causing **splanchnic vasoconstriction** (beta-2 blockade), thereby decreasing splanchnic blood flow. *Both A & R true, R doesn't explain A* - The reasoning provided (reduction in cardiac output and splanchnic blood flow) directly explains the mechanism by which **beta blockers** reduce **portal pressure** and subsequently prevent **variceal bleeding**, thus improving survival [1]. - Therefore, the reason *does* explain the assertion. *A true R false* - The assertion that **beta blockers** improve survival in cirrhosis with varices is **true**. - The reason—that they reduce cardiac output and splanchnic blood flow—is also **true** and describes their key mechanism of action in this context. *A false R true* - The assertion is **true**: non-selective **beta blockers** are a cornerstone in the primary and secondary prophylaxis of **variceal hemorrhage** in **cirrhosis**, improving survival. - The reason is also **true**, as these mechanisms are well-established pharmacological effects of **beta blockers** leading to reduced **portal hypertension** [1].
Question 3: Renal vein thrombosis is associated with all of the following conditions except:
- A. Nephrotic syndrome
- B. Dehydration
- C. Sickle cell anemia
- D. Trauma (Correct Answer)
Explanation: **Trauma** - While trauma to the abdomen can cause **renal injury** and other vascular issues, isolated **renal vein thrombosis** is not a common direct association or complication [1]. - Renal vein thrombosis typically results from conditions that lead to a **hypercoagulable state** or local vascular stasis. *Sickle cell anemia* - Individuals with **sickle cell anemia** are prone to **vaso-occlusive crises** from sickled red blood cells obstructing blood flow [2]. - This can lead to **renal medullary ischemia** and infarction, making them highly susceptible to **renal vein thrombosis**. *Nephrotic syndrome* - **Nephrotic syndrome** is a significant risk factor for **renal vein thrombosis** due to the urinary loss of **antithrombin III**, a natural anticoagulant. - This loss creates a **hypercoagulable state**, increasing the likelihood of thrombus formation in renal veins. *Dehydration* - Severe **dehydration** leads to **hemoconcentration** (increased blood viscosity) and reduced blood flow. - These factors promote a **hypercoagulable state**, increasing the risk of thrombotic events, including **renal vein thrombosis**, especially in vulnerable populations like infants or the elderly.
Question 4: The contraceptive which is contraindicated in DVT is?
- A. Barrier method
- B. Non hormonal IUCD
- C. Billing's method
- D. OCP (Correct Answer)
Explanation: ***OCP*** - **Oral contraceptive pills (OCPs)**, especially those containing estrogen, increase the risk of **venous thromboembolism (VTE)**, including deep vein thrombosis (DVT). - Estrogen promotes a **hypercoagulable state** by increasing clotting factors and decreasing natural anticoagulants. *Barrier method* - **Barrier methods** like condoms or diaphragms are non-hormonal and act physically to prevent sperm from reaching the egg. - They have **no systemic effects** on coagulation and are safe for individuals with DVT. *Non hormonal IUCD* - **Non-hormonal intrauterine contraceptive devices (IUCDs)**, such as copper IUCDs, prevent conception primarily by causing a local inflammatory reaction in the uterus. - They do not release hormones and therefore **do not affect coagulation** or increase DVT risk. *Billing's method* - The **Billing's ovulation method** (cervical mucus method) is a natural family planning technique based on observing changes in cervical mucus. - It involves no medications or devices and thus has **no impact on DVT risk**.
Question 5: Which of the following is true about the inferior vena cava (IVC)?
- A. It receives blood from the pulmonary veins
- B. It drains blood from the lower body (Correct Answer)
- C. It lies to the left of the aorta
- D. It passes through the aortic hiatus
Explanation: ***It drains blood from the lower body*** - The **inferior vena cava (IVC)** is a large vein that carries **deoxygenated blood** from the lower and middle body into the right atrium of the heart [1]. - It collects blood from veins such as the renal veins, hepatic veins, and iliac veins. *It receives blood from the pulmonary veins* - The **pulmonary veins** carry **oxygenated blood** from the lungs to the **left atrium** of the heart, not the IVC. - The IVC carries deoxygenated blood to the **right atrium** [1]. *It lies to the left of the aorta* - The **inferior vena cava** typically lies to the **right** of the aorta in the retroperitoneum. - The aorta is generally positioned more to the left of the midline compared to the IVC. *It passes through the aortic hiatus* - The **IVC** passes through its own opening in the diaphragm, the **caval opening**, at the level of T8. - The **aortic hiatus** is an opening in the diaphragm through which the **aorta** passes, located more posteriorly and inferiorly at T12.
Question 6: What is the purpose of pneumatic compression stockings?
- A. Prevention of deep vein thrombosis (DVT) (Correct Answer)
- B. Prevention of hypothermia
- C. Management of varicose veins
- D. Treatment of cellulitis
Explanation: ***Prevention of deep vein thrombosis (DVT)*** - Pneumatic compression stockings work by **mechanically compressing** the legs, promoting venous return and preventing blood stasis in the deep veins. - This increased blood flow reduces the risk of **clot formation**, which is crucial in DVT prevention, especially in immobile patients. *Prevention of hypothermia* - While stockings might offer a minimal amount of insulation, their primary design and mechanism of action are **not aimed at regulating body temperature**. - **Other methods** like warming blankets or forced-air warmers are used for the effective prevention of hypothermia. *Management of varicose veins* - **Graduated compression stockings** (not pneumatic) are used for the management of varicose veins by providing constant external pressure. - Pneumatic compression stockings apply **intermittent pressure**, which is not ideal for the continuous support required for varicose vein management. *Treatment of cellulitis* - Cellulitis is a **bacterial infection** of the skin and subcutaneous tissue, requiring antibiotic treatment. - Compression stockings are generally **contraindicated** in acute cellulitis as they can worsen inflammation and impede circulation.
Question 7: Primary vascular access of choice in chronic kidney disease is:
- A. Radio-cephalic fistula (Correct Answer)
- B. PTFE graft
- C. Brachio-cephalic fistula
- D. Permcath
Explanation: ***Radio-cephalic fistula*** - The **radio-cephalic fistula** is the preferred primary vascular access in **chronic kidney disease** patients because it has the longest patency rates and lowest complication rates. - It is often created at the **wrist** and involves an anastomosis between the **radial artery** and the **cephalic vein**. *PTFE graft* - **PTFE grafts** are typically used when autologous veins are unsuitable for fistula creation due to poor quality or prior failures. - They tend to have **lower patency rates** and **higher infection rates** compared to native fistulas. *Brachio-cephalic fistula* - A **brachio-cephalic fistula** is usually considered a secondary option when a radio-cephalic fistula is not feasible. - It is created in the **upper arm** and generally has a **shorter lifespan** and potentially more complications than a wrist fistula. *Permcath* - A **Permcath** (tunneled central venous catheter) is a temporary or short-term access option, often used for immediate dialysis needs or when no other vascular access is possible. - It carries a **high risk of infection** and central venous stenosis, making it unsuitable for long-term primary vascular access.
Question 8: Surgery in varicose veins is NOT attempted in the presence of which of the following?
- A. Deep vein thrombosis (Correct Answer)
- B. Multiple incompetent perforators
- C. Varicose veins with leg ulcer
- D. None of the above
Explanation: ***Deep vein thrombosis*** - **Surgery in varicose veins is absolutely contraindicated in the presence of DVT** (both acute and chronic) - In **acute DVT**, the deep venous system is already compromised, and removing superficial veins could further impair venous return and worsen the thrombotic state - In **chronic DVT with post-thrombotic syndrome**, the deep veins may be occluded or heavily damaged, and the superficial varicosities often serve as **crucial collateral vessels** to maintain venous drainage—their removal would be detrimental - Surgery should only be considered after complete resolution of acute DVT and adequate anticoagulation *Multiple incompetent perforators* - **NOT a contraindication**—incompetent perforators are actually a common indication for surgical treatment - Incompetent perforators contribute to venous insufficiency and recurrent varicose veins - Can be addressed surgically with **subfascial endoscopic perforator surgery (SEPS)** or endovenous ablation techniques - Their presence often indicates need for more comprehensive treatment alongside superficial venous surgery *Varicose veins with leg ulcer* - **NOT a contraindication**—venous leg ulcers are actually an **indication for varicose vein surgery** - Leg ulcers result from chronic venous hypertension due to venous insufficiency - Surgical treatment (saphenous vein ablation, ligation and stripping, or sclerotherapy) reduces venous hypertension and improves venous drainage - Surgery promotes ulcer healing and prevents recurrence when combined with appropriate wound care *None of the above* - Incorrect because **Deep Vein Thrombosis (DVT) is a well-established contraindication** to varicose vein surgery
Question 9: Deep vein thrombosis most commonly occurs at which site?
- A. Femoral vein (Correct Answer)
- B. Subclavian vein
- C. External jugular vein
- D. Internal jugular vein
Explanation: ***Femoral vein*** - The **femoral vein**, along with the **popliteal** and **iliac veins**, are the most common sites for **deep vein thrombosis (DVT)** in the lower extremities [1]. - Due to their size and the dynamics of blood flow in these regions, they are prone to clot formation, especially in the presence of **Virchow's triad**. *Subclavian vein* - While DVT can occur in the subclavian vein (an **upper extremity DVT**), it is less common than in the lower extremities [1]. - Upper extremity DVTs are often associated with **central venous catheters** or **thoracic outlet syndrome**. *External jugular vein* - **External jugular vein thrombosis** is rare and usually associated with local trauma, infection, or central line placement, not typically primary DVT [1]. - It is a superficial vein and not considered a common site for typical deep vein thrombosis. *Internal jugular vein* - **Internal jugular vein thrombosis** is also uncommon as a primary DVT and often secondary to neck infections, malignancies, or indwelling catheters [1]. - Like the subclavian vein, it's considered an upper extremity DVT site, but less frequent than lower extremity sites.
Question 10: Which article of the Indian Constitution allows the state to intervene in cases of hunger strikes to protect the right to life?
- A. Article 21 (Correct Answer)
- B. Article 35
- C. Article 48
- D. Article 52
Explanation: ***Article 21*** - This article guarantees the **right to life and personal liberty**, a fundamental right that the state is obligated to protect. - The Supreme Court has interpreted this right to include the right to a dignified life, which obliges the state to intervene to prevent self-harm, such as in cases of a **prolonged hunger strike**. *Article 35* - This article deals with the **power of Parliament to make laws** to give effect to certain provisions of Part III (Fundamental Rights) of the Constitution. - It does not directly provide a right to life or allow for state intervention in hunger strikes based on this right. *Article 48* - This article is part of the **Directive Principles of State Policy** and deals with the organization of **agriculture and animal husbandry**. - It focuses on promoting modern and scientific methods for these sectors and does not relate to the right to life or hunger strikes. *Article 52* - This article states that there shall be a **President of India**. - It defines the office of the President and does not relate to fundamental rights or state intervention in cases of hunger strikes.
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