Which of the below-mentioned signs indicates obstructive jaundice?

Daman & Diu Staff Nurse - 2018

Medical Surgical Nursing

Medium

Appeared in: Daman & Diu Staff Nurse - 2018

Explanation

Obstructive jaundice is caused by a blockage in the bile ducts, preventing bile from reaching the intestine.
Bile contains bilirubin, which is converted to stercobilin in the gut, giving stool its brown color.
When bile flow is obstructed, stercobilin is not produced, leading to pale, grey, or clay-colored stools.
This is a classic and specific sign of a post-hepatic (obstructive) process.

Option A: This is a normal finding. In obstructive jaundice, excess conjugated bilirubin is excreted by the kidneys, causing the urine to become dark (tea or cola-colored).
Option C: Reduced hematocrit indicates anemia or blood loss. It is more commonly associated with pre-hepatic (hemolytic) jaundice, where red blood cells are destroyed at an increased rate.
Option D: Urobilinogen is formed from bilirubin in the intestine. In obstructive jaundice, bilirubin cannot reach the intestine, so urobilinogen production ceases. Consequently, urine urobilinogen levels are absent or very low.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Clinical signs of obstructive (post-hepatic) jaundice as background academic context rather than a clinical decision trigger.
Assessing stool and urine color is a fundamental, non-invasive nursing assessment to help differentiate the type of jaundice and monitor disease progression or response to treatment.
Promptly reporting clay-colored stools and dark urine is critical, as obstructive jaundice can indicate serious conditions like gallstones, biliary strictures, or pancreatic/biliary tumors that require urgent medical or surgical intervention.
What if? - If the patient presented with jaundice, dark stools, and elevated urine urobilinogen, the nurse should suspect hemolytic (pre-hepatic) jaundice. The clinical investigation would then shift towards causes of red blood cell destruction (e.g., autoimmune disorders, drug reactions) rather than a bile duct blockage.

How to Approach the Question

First, identify the core concept being tested: the specific signs of 'obstructive jaundice'.
Recall the pathophysiology of obstructive jaundice. It is a 'post-hepatic' problem, meaning the blockage occurs after the liver has processed the bilirubin.
Trace the path of bile. Normally, it flows from the liver, through the bile ducts, into the intestine. An obstruction blocks this path.
Consider the consequences of the blockage: If bile (containing bilirubin) cannot get into the intestine, it cannot color the stool. This leads to pale, clay-colored stools.
Simultaneously, the blocked bilirubin backs up into the bloodstream and is excreted by the kidneys, making the urine dark.
Evaluate each option against this understanding: 'Straw-coloured urine' is incorrect (urine becomes dark). 'Reduced hematocrit' relates to hemolysis (pre-hepatic). 'Elevated urobilinogen' is incorrect (urobilinogen is absent as bilirubin never reaches the gut).

Concept Tested & Keywords

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E6 Textbook of Biochemistry for medical StudentsDM Vasudevan Part 2 — Subpart A (pp 1-239 of 478) p. 30-32

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