A 47-year-old man with liver failure has developed ascites. The nurse understands that ascites is due to?

HPSSC - 2015

Medical & Surgical Nursing

Medium

Appeared in: HPSSC - 2015

Explanation

The liver is the primary site for the synthesis of many proteins, including albumin.
In liver failure, the production of albumin is significantly reduced, leading to hypoalbuminemia (low protein levels in the blood).
Albumin is responsible for maintaining colloid osmotic pressure, which holds fluid within the blood vessels.
A deficiency in protein (albumin) causes a drop in this pressure, allowing fluid to shift from the vascular space into the peritoneal cavity, resulting in ascites.
This effect is compounded by increased portal hypertension, which also pushes fluid out of the vessels.

Option A: Vitamin deficiencies are a complication of liver failure, particularly fat-soluble vitamins (A, D, E, K), but they do not directly cause the fluid shift that leads to ascites.
Option B: Dehydration is a state of overall fluid deficit. Ascites is the opposite; it is an accumulation of excess fluid, although it is trapped in the peritoneal cavity (a 'third space') and not available for circulation.
Option C: Bleeding disorders in liver failure are caused by the liver's inability to synthesize clotting factors and by thrombocytopenia from hypersplenism. This leads to bleeding, not fluid accumulation.

Clinical Relevance

Nursing practice connection: Use the key finding related to Pathophysiology of ascites in liver failure to guide bedside assessment, documentation, and the next nursing action.
Nurses play a vital role in managing ascites by monitoring daily weights, measuring abdominal girth, enforcing sodium and fluid restrictions, and administering diuretics like spironolactone and furosemide.
Accurate assessment is crucial because rapid fluid shifts can lead to electrolyte imbalances, hypotension, and renal dysfunction (hepatorenal syndrome).
Patient education is key, focusing on dietary changes (low sodium), medication adherence, and recognizing signs of complications like spontaneous bacterial peritonitis (SBP), such as fever or new abdominal pain.

How to Approach the Question

First, identify the key elements in the question: a patient with 'liver failure' has developed 'ascites'. The question asks for the cause ('due to').
This is a pathophysiology question. Think about the main functions of the liver that, when impaired, could lead to fluid accumulation in the abdomen.
Recall the liver's major functions: metabolism, detoxification, storage, and synthesis. Focus on the synthesis function.
Consider the options. Evaluate each one in the context of liver function. Does the liver make vitamins? No, it metabolizes them. Does it regulate hydration directly? No. Does it make clotting factors? Yes. Does it make proteins? Yes.
Connect protein synthesis to fluid balance. The liver makes albumin, the main protein for maintaining plasma oncotic pressure. A failing liver can't make albumin.
Therefore, low protein (albumin) leads to low oncotic pressure, causing fluid to leak out of vessels. This directly explains ascites, making 'Protein deficiency' the most logical cause.

Concept Tested & Keywords

Concept Tested: Pathophysiology of ascites in liver failure
Stem keywords: liver failure, ascites
Lead-in keywords: due to
Clinical cues: A patient with a known diagnosis of liver failure presenting with a common complication (ascites).

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E6 Medicine Harrison 22e Part 2 p. 619-621

E6 Pathology-Textbook of PATHOLOGYHarsh Mohan Part 3 (515-969) p. 94-96