The lack of oxygen in the tissue is called?

Appeared in: RRB Nsg. Superintendent 21 July 2019 (shift 1st)

Explanation

Hypoxia is the precise medical term for a state of inadequate or decreased oxygen supply to the tissues at the cellular level.
It results from a deficiency in either oxygen delivery or oxygen utilization by the cells.
This condition is life-threatening and can lead to severe complications like cardiac dysrhythmias if left untreated.
Unlike anoxia, which means a total absence of oxygen, hypoxia refers to a partial lack or reduction in oxygen.

Option A: Anorexia refers to a loss of appetite or an eating disorder (Anorexia Nervosa). It is not related to the levels of oxygen in the body's tissues.
Option B: Anoxia refers to the complete absence or total lack of oxygen supply to a tissue or organ. This is a more extreme and severe condition than hypoxia.
Option C: Cyanosis is a clinical sign of hypoxia, not the condition itself. It is the bluish discoloration of the skin and mucous membranes caused by an increased amount of deoxygenated hemoglobin in the blood.

Visual 1: Comparison Chart - A chart visually differentiating Hypoxia, Anoxia, Ischemia, and Cyanosis with their definitions and key features.
Visual 2: Diagram - An illustration showing the effect of different types of hypoxia (e.g., anemic, stagnant) on the oxygen transport chain from the lungs to the cells.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Medical terminology for tissue oxygenation levels as background academic context rather than a clinical decision trigger.
Nurses constantly monitor for signs of hypoxia, which include restlessness, anxiety, confusion, increased heart rate (tachycardia), and increased respiratory rate (tachypnea).
Pulse oximetry (measuring SpO2) is a critical non-invasive tool used at the bedside to assess a patient's oxygen saturation and detect hypoxia early.
Cyanosis is a late sign of hypoxia, indicating a significant oxygen deficit. Its presence requires immediate intervention.

How to Approach the Question

First, identify the key terms in the question stem: 'lack of oxygen' and 'tissue'.
This is a definition-based recall question. Your goal is to match the definition to the correct medical term.
Analyze the options. Notice the similar prefixes 'An-' and 'Hypo-'. Recall that 'hypo-' means 'low' or 'under', while 'an-' means 'without' or 'absence of'.
Differentiate between 'hypoxia' (low oxygen) and 'anoxia' (no oxygen). Since the question specifies a 'lack' (deficiency), hypoxia is a better fit than anoxia (total absence).
Consider the other options. 'Cyanosis' is a sign or symptom, not the underlying condition. 'Anorexia' is related to appetite and is irrelevant to oxygenation.
Select the term that most accurately describes a deficiency or lack of oxygen in the tissues.

Concept Tested & Keywords

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Guyton & Hall Textbook of Medical Physiology 13e — Part 2 p. 298-310

Practise the full RRB Nsg. Superintendent 21 July 2019 (shift 1st)

Attempt every question from this paper in a timed mock, then review the full solution for each one.