Dark and tarry colored stool is termed as?

Appeared in: IGNOU Post B. SC. Nursing entrance-2019

Explanation

Melena is the correct medical term for black, tarry, and foul-smelling stools.
This distinct appearance results from the hemoglobin in blood being altered by digestive enzymes and intestinal bacteria as it travels through the upper gastrointestinal (GI) tract.
It is a hallmark sign of upper GI bleeding, originating from sources like the esophagus, stomach, or duodenum.
The presence of melena suggests that bleeding has been significant enough (at least 50-100 mL) and has occurred high enough in the GI tract for the blood to be digested.

Option A: Epistaxis is the medical term for a nosebleed. The bleeding originates from the nasal cavity, not the gastrointestinal tract.
Option C: Hemoptysis is the coughing up of blood or bloody sputum from the lungs or airway. It is a sign of respiratory, not gastrointestinal, bleeding.
Option D: Hematemesis is the vomiting of blood. While it also indicates an upper GI bleed, it refers to the expulsion of blood through the mouth, not in the stool. The vomited blood can be bright red or have a 'coffee-ground' appearance.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Medical terminology for gastrointestinal bleeding as background academic context rather than a clinical decision trigger.
A nurse's prompt identification of melena is critical for early intervention in a potentially life-threatening upper GI bleed.
Immediate nursing actions include assessing the patient for hemodynamic instability (checking blood pressure for hypotension, heart rate for tachycardia, and assessing for dizziness), establishing large-bore IV access for potential fluid or blood product resuscitation, and notifying the healthcare provider.
Patient education should include instructions to report any black or tarry stools immediately, especially if they are taking medications like NSAIDs or anticoagulants that increase bleeding risk.

How to Approach the Question

This is a factual recall question that tests knowledge of medical terminology.
First, identify the key descriptive phrase in the question: 'Dark and tarry colored stool'.
Next, systematically review each option and recall its definition.
Option A, Epistaxis, is a nosebleed.
Option B, Melena, is black, tarry stool from digested blood.
Option C, Hemoptysis, is coughing up blood.

Concept Tested & Keywords

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E6 Nursing Brunner Adult Health 3SA Vol 1 Part 2 p. 137-139

E6 Medicine Macleod Clinical Examination 15e p. 120-122

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