A patient has chronic liver disease with disturbed of coagulation due to deficiency of?

NORCET 2 -2021 (Shift-2)

Medical & Surgical Nursing

Easy

Appeared in: NORCET 2 -2021 (Shift-2)

Explanation

The liver is the primary site for the synthesis of most blood clotting factors.
Vitamin K is a fat-soluble vitamin essential for the post-translational modification (carboxylation) that activates clotting factors II, VII, IX, and X.
In chronic liver disease, hepatocellular damage impairs the synthesis of these factors.
Additionally, liver disease often causes cholestasis (reduced bile flow), which is necessary for absorbing fat-soluble vitamins. This leads to a deficiency of Vitamin K, further worsening the coagulopathy.
The Prothrombin Time (PT) is a sensitive test for liver dysfunction because it measures Factor VII, which has the shortest half-life of all the Vitamin K-dependent factors.

Option A: Vitamin D is primarily involved in calcium and phosphate metabolism and is crucial for bone health. Its deficiency does not directly cause coagulation disorders.
Option C: Vitamin A is essential for vision, immune function, and epithelial cell integrity. Its deficiency leads to conditions like night blindness, not a bleeding diathesis.
Option D: Vitamin E is an antioxidant. While extremely high doses of Vitamin E can interfere with Vitamin K's function and potentiate bleeding, a deficiency of Vitamin E is not a primary cause of coagulopathy in liver disease.

Visual 1: Diagram: The coagulation cascade, clearly highlighting the Vitamin K-dependent factors (II, VII, IX, X) and their position in the intrinsic, extrinsic, and common pathways.
Visual 2: Flowchart: Pathophysiology of coagulopathy in liver disease, illustrating the two main pathways: 1) Hepatocellular failure leading to decreased synthesis of clotting factors, and 2) Cholestasis leading to malabsorption of Vitamin K.

Clinical Relevance

Nursing practice connection: Use the key finding related to Pathophysiology of Coagulopathy in Chronic Liver Disease to guide bedside assessment, documentation, and the next nursing action.
Nurses must closely monitor coagulation profiles, particularly the Prothrombin Time (PT) and International Normalized Ratio (INR), in patients with liver disease.
Implementing bleeding precautions is a critical nursing responsibility for these patients. This includes using soft-bristled toothbrushes, avoiding intramuscular injections, applying pressure to venipuncture sites, and monitoring for signs of bleeding like petechiae, ecchymosis, or melena.
What if? If a patient with severe liver disease is given intravenous (IV) Vitamin K and their INR fails to correct, it signifies severe hepatocellular dysfunction. This indicates the liver cells are too damaged to utilize the vitamin to produce clotting factors, which is a poor prognostic sign.

How to Approach the Question

Identify the core clinical concepts in the question: 'chronic liver disease' and 'disturbed coagulation'.
Recall the major functions of the liver. One of its most critical roles is synthesizing proteins, including most of the body's clotting factors.
Connect this to vitamin metabolism. Ask yourself, 'Which vitamin is famously linked to blood clotting?'
Evaluate the options based on this connection. Vitamin K is the key vitamin required for the synthesis of several clotting factors (II, VII, IX, X).
Consider the pathophysiology. Liver disease not only damages the 'factory' (hepatocytes) that makes clotting factors but also impairs the absorption of the key 'raw material' (Vitamin K) needed for production, making it the correct answer.

Concept Tested & Keywords

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