The most serious complication of deep vein thrombosis (DVT) is a blockage known as?

AIIMS Patna NO - 2020

Medical & Surgical Nursing

Easy

Appeared in: AIIMS Patna NO - 2020

Explanation

Pulmonary embolism (PE) is the most common and fatal form of venous thromboembolism, making it the most serious complication of DVT.
It occurs when a fragment of a thrombus from a DVT dislodges, travels through the venous system to the right side of the heart, and lodges in the pulmonary arterial vasculature.
A massive PE can obstruct 60% or more of the pulmonary circulation, leading to sudden death, acute right heart failure (cor pulmonale), or cardiovascular collapse.
In over 95% of cases, pulmonary emboli originate from deep vein thromboses in the legs.

Option A: Formation of venous ulcers is a chronic, long-term complication of DVT, resulting from post-thrombotic syndrome and chronic venous insufficiency. While serious and difficult to manage, it is not an immediate life-threatening event like a pulmonary embolism.
Option B: Chronic occlusion of veins leads to post-thrombotic syndrome, characterized by persistent swelling, pain, and skin discoloration. This is a chronic condition that impairs quality of life but is not as acutely fatal as a pulmonary embolism.
Option C: Venous gangrene is an extremely rare and severe complication of DVT, typically associated with massive thrombosis (phlegmasia cerulea dolens) that obstructs nearly all venous outflow. Pulmonary embolism is a far more common serious complication.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Complications of Deep Vein Thrombosis (DVT) as background academic context rather than a clinical decision trigger.
Nurses play a critical role in DVT prevention (e.g., early ambulation, compression devices, anticoagulants) and early detection of both DVT and PE.
A key nursing safety measure is to never massage a patient's calf if DVT is suspected, as this can dislodge the clot and cause a PE.
Recognizing the subtle signs of PE (sudden dyspnea, tachypnea, chest pain) and escalating care immediately is a life-saving nursing action.

How to Approach the Question

First, identify the keywords in the question: "most serious complication" and "deep vein thrombosis (DVT)".
The term "most serious" in a clinical context typically refers to the complication with the highest risk of mortality or severe, acute morbidity.
Evaluate each option based on its acuity and potential for fatality.
Formation of venous ulcers and chronic occlusion are chronic (long-term) complications, not acute emergencies.
Gangrene is severe but very rare. Pulmonary embolism is both common and potentially fatal.
Compare the immediate risk of each option. A blockage in the lungs (pulmonary embolism) poses a direct and immediate threat to life by impairing oxygenation and circulation.

Concept Tested & Keywords

Q0T7UhmFxFnzipAE-YSKmB

E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed p. 139-141

E6 Pathology-Textbook of PATHOLOGYHarsh Mohan Part 1 (1-214) p. 205-207