Which of the following organs is most affected by jaundice?

Appeared in: NHM UP Staff Nurse - 2017

Explanation

Jaundice is the yellow discoloration of the skin and sclera caused by high levels of bilirubin in the blood (hyperbilirubinemia).
The liver is the primary organ responsible for bilirubin metabolism. It performs three key functions: uptake of unconjugated bilirubin from the blood, conjugation to make it water-soluble, and excretion into the bile.
Any disease or dysfunction of the liver (e.g., hepatitis, cirrhosis) or blockage of its bile ducts directly impairs this process, causing bilirubin to accumulate in the body.
Therefore, jaundice is considered a primary sign of liver disease, making the liver the most affected organ.

Option B: The kidneys play a secondary role. They filter and excrete the excess water-soluble conjugated bilirubin from the blood, which is why jaundice is often accompanied by dark urine. However, the primary pathology is not in the kidneys.
Option C: The lungs have no physiological role in the metabolism or excretion of bilirubin. They are not affected by jaundice.
Option D: This option is incorrect because the liver is the primary and most affected organ. While severe, chronic liver disease can lead to complications that affect kidney function (hepatorenal syndrome), the initial and central problem in jaundice lies with the liver.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pathophysiology of Jaundice and Organ Involvement as background academic context rather than a clinical decision trigger.
Nurses must perform a thorough assessment for jaundice by inspecting the skin, sclera (whites of the eyes), and mucous membranes for yellow discoloration.
Assessing the color of urine (dark or tea-colored) and stools (pale or clay-colored) is crucial, as it provides clues to the type of jaundice (e.g., pale stools suggest obstructive jaundice).
Monitoring liver function tests (LFTs), including total and direct bilirubin, is a key nursing responsibility in patients with suspected or confirmed liver disease.

How to Approach the Question

First, identify the key concept in the question, which is 'jaundice'.
Recall the basic pathophysiology of jaundice: it is a symptom caused by high levels of bilirubin in the blood.
Consider the function of each organ listed in the options in relation to bilirubin metabolism.
The liver is the central organ for processing bilirubin. The kidneys are involved in excretion but are not the primary site of metabolism. The lungs are not involved.
Based on this, deduce that a problem with bilirubin (jaundice) is fundamentally a problem related to the liver's function.
Therefore, the liver is the organ most directly and significantly affected.

Concept Tested & Keywords

Q6E_GAJV8-oTopUyy1uO4X

E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 221-223

E6 Pathology-Textbook of PATHOLOGYHarsh Mohan Part 3 (515-969) pp. 93-95, 88-90

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