In which condition blood viscosity increases and raises the risk of Intravascular clotting?

RUHS, Jaipur, PB B.Sc Nursing Entrance-2023

Medical & Surgical Nursing

Medium

Appeared in: RUHS, Jaipur, PB B.Sc Nursing Entrance-2023

Explanation

Polycythemia is a disorder characterized by an excessive number of red blood cells (RBCs) in the bloodstream, leading to an elevated hematocrit.
This overproduction of RBCs increases the overall volume and concentration of cells in the blood, a state known as hyperviscosity (thickened blood).
Thickened, slow-moving blood is more prone to forming clots (thrombi) inside blood vessels, a condition known as intravascular thrombosis.
This significantly elevates the risk for serious complications like stroke, heart attack, deep vein thrombosis (DVT), and pulmonary embolism.

Option A: Thrombocytopenia is a condition of low platelet count. Platelets are essential for forming clots, so a deficiency leads to an increased risk of bleeding, which is the opposite of the condition described in the question.
Option C: Leucopenia is a decrease in the total number of white blood cells (WBCs). This weakens the immune system but does not directly increase blood viscosity or the risk of clotting.
Option D: Neutropenia is a specific type of leucopenia with a low count of neutrophils. It severely increases the risk of bacterial and fungal infections but is not primarily related to blood viscosity or thrombosis.

Clinical Relevance

Nursing practice connection: Knowing Pathophysiology of blood disorders affecting viscosity and clotting helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Nurses caring for patients with polycythemia must prioritize monitoring for signs and symptoms of thrombosis, such as unilateral leg swelling and pain (DVT), sudden chest pain and shortness of breath (pulmonary embolism), or neurological changes like facial drooping or weakness (stroke).
Patient education is a key nursing intervention. It should focus on maintaining adequate hydration to help decrease blood viscosity, avoiding iron supplements (which can stimulate more RBC production), and recognizing the early symptoms of clotting to report immediately.
What if? If a patient with polycythemia becomes dehydrated (e.g., due to vomiting or diarrhea), their blood viscosity increases even further, dramatically elevating the immediate risk of a thrombotic event. The nursing priority would be aggressive fluid resuscitation and close monitoring.

How to Approach the Question

First, identify the core concepts in the question: 'increased blood viscosity' and 'risk of intravascular clotting'.
Recall the primary functions of different blood components. Red blood cells (RBCs) are the most numerous and are the main determinant of blood viscosity. Platelets are for clotting. White blood cells (WBCs) are for immunity.
Analyze each option based on its name and known function:
Thrombocytopenia: 'Thrombo-' relates to platelets, and '-penia' means deficiency. Low platelets cause bleeding, not clotting. Eliminate this option.
Polycythemia: 'Poly-' means many, and '-cythemia' relates to cells in the blood. An excess of cells, especially RBCs, would make the blood thicker (more viscous) and prone to clotting. This is a strong candidate.
Leucopenia/Neutropenia: 'Leuco-' and 'Neutro-' relate to white blood cells, and '-penia' means deficiency. Low WBCs lead to infection risk, not increased viscosity or clotting. Eliminate these options.

Concept Tested & Keywords

Concept Tested: Pathophysiology of blood disorders affecting viscosity and clotting.
Stem keywords: blood viscosity, Intravascular clotting, risk
Lead-in keywords: In which condition

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