Lack of oxygen in the tissue is called?

Appeared in: NHM UP Staff Nurse - 2019

Explanation

Hypoxia is the specific medical term for inadequate oxygenation of tissues at the cellular level.
It results from a deficiency in either oxygen delivery or oxygen utilization by the cells and is considered a life-threatening condition.
Hypoxia can be caused by various factors, including hypoxemia (low blood oxygen), poor tissue perfusion (as in shock), anemia (low hemoglobin), or cellular poisoning (like cyanide).

Option B: Cyanosis is a physical sign, not the underlying condition. It is the bluish discoloration of the skin and mucous membranes caused by an increased amount of deoxygenated hemoglobin in the capillaries.
Option C: Asphyxia is a more complex and severe condition involving a lack of oxygen combined with an excess of carbon dioxide in the blood and tissues, often leading to unconsciousness or death (suffocation).
Option D: Hypoxemia refers to a deficiency of oxygen specifically in the arterial blood, not the tissues.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definitions of oxygen deprivation states (Hypoxia, Hypoxemia, Asphyxia, Cyanosis) as background academic context rather than a clinical decision trigger.
Nurses must continuously assess for early signs of hypoxia, such as restlessness, apprehension, confusion, and tachycardia, as it can rapidly lead to severe complications.
Pulse oximetry is a crucial non-invasive tool for monitoring oxygen saturation (SpO2) to detect hypoxemia, a primary cause of hypoxia.
What if? If a patient has a normal pulse oximetry reading but shows signs of altered mental status, the nurse should suspect forms of hypoxia not caused by hypoxemia, such as carbon monoxide poisoning or severe anemia, where oxygen delivery or utilization is impaired at the tissue level.

How to Approach the Question

First, identify the key anatomical location specified in the question, which is 'tissue'.
Next, recall the precise definitions for each of the options provided.
Differentiate between a condition affecting the blood (hypoxemia) and one affecting the tissues (hypoxia).
Recognize that cyanosis is a clinical sign, not the condition itself, and asphyxia is a more complex state of suffocation.
Match the term 'hypoxia' directly with its definition related to 'tissue' to select the correct answer.

Concept Tested & Keywords

Concept Tested: Definitions of oxygen deprivation states (Hypoxia, Hypoxemia, Asphyxia, Cyanosis).
Stem keywords: Lack of oxygen, tissue
Lead-in keywords: is called

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E6 Nursing Fundamentals Potter Perry 12e Part 4 p. 234-236

E6 Physiology Guyton 4SAE Part 2A p. 94-96

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