Blood clot floating in the circulating blood?

HPSSSB Staff Nurse - 2016

Medical & Surgical Nursing

Easy

Appeared in: HPSSSB Staff Nurse - 2016

Explanation

An embolus is a detached intravascular solid, liquid, or gaseous mass that is carried by the blood from its point of origin to a distant site.
The defining characteristic of an embolus is that it is mobile ('floating') within the circulation, which directly answers the question.
The vast majority of emboli are dislodged thrombi, a condition known as thromboembolism.
When an embolus lodges in a vessel too small for it to pass, it causes an embolism, leading to partial or complete vascular occlusion and potential tissue infarction.

Option B: A thrombus is a blood clot, but it is stationary and attached to the vessel wall. The question specifies a 'floating' clot.
Option C: Plaque refers to an atherosclerotic deposit of fat, cholesterol, and other substances within the artery wall. It is a fixed part of the vessel structure, not a floating blood clot.
Option D: An aneurysm is a localized, abnormal bulge or ballooning in the wall of a blood vessel. It is a structural defect of the vessel, not a clot.

Clinical Relevance

Nursing practice connection: Knowing Differentiation between intravascular abnormalities: Embolus, Thrombus, Plaque, and Aneurysm helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Distinguishing between a thrombus and an embolus is critical for nurses. An embolus represents an immediate threat of sudden blockage in vital organs like the lungs (pulmonary embolism), brain (stroke), or heart (myocardial infarction).
A primary nursing goal is the prevention of deep vein thrombosis (DVT), as these are the most common source of pulmonary emboli. Prophylactic measures include early ambulation, compression devices, and anticoagulant therapy.
What if? If a patient has atrial fibrillation, the risk of an embolus forming in the heart and traveling to the brain (cardioembolic stroke) is significantly increased. This changes the primary prevention strategy to focus on oral anticoagulants to prevent clot formation in the left atrium.

How to Approach the Question

First, identify the key descriptive words in the question: 'blood clot', 'floating', and 'circulating'.
The word 'floating' is the most critical clue, as it implies movement and detachment within the bloodstream.
Evaluate each option against this primary clue.
A 'thrombus' is a clot, but it is defined as being attached or stationary.
An 'embolus' is defined as a traveling or 'floating' intravascular mass.
'Plaque' and 'aneurysm' are structural issues related to the vessel wall itself, not floating clots.

Concept Tested & Keywords

Concept Tested: Differentiation between intravascular abnormalities: Embolus, Thrombus, Plaque, and Aneurysm.
Stem keywords: blood clot, floating, circulating blood
Lead-in keywords: BEST, MOST RELEVANT CLUE
Negative lead-in flag: false

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E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed p. 138-140

E6 Pathology-Textbook of PATHOLOGYHarsh Mohan Part 1 (1-214) p. 204-206