NURA 303: Oxygenation, Perfusion, and Respiratory
Assessment Key Concepts
Key Respiratory Terms and Definitions
Definitions of Key Terms
Anoxia: The absence or almost complete absence of oxygen
from inspired gases, arterial blood, or tissues.
Apnea: Absence of spontaneous breathing, which can lead
to hypoxia if prolonged.
Bradypnea: A decrease in respiratory rate, often indicative
of underlying health issues.
Cheyne-Stokes Respirations: A pattern of deep fast
breathing alternating with slow shallow respirations, often
seen in patients nearing death.
Dyspnea: Difficulty breathing, which can be a symptom of
various respiratory conditions.
Eupnea: Normal adult breathing rate of 12–20 breaths/min,
indicating effective ventilation.
Additional Respiratory Terms
Expiration: A passive process of breathing out, essential for
removing carbon dioxide from the body.
Hyperventilation: Overbreathing often caused by anxiety,
leading to decreased CO₂ levels in the blood.
, Hypoxemia: Insufficient oxygen in the blood, which can
lead to tissue hypoxia if severe.
Hypoxia: A condition where SpO₂ is less than 90%,
indicating inadequate oxygen supply at the tissue level.
Inspiration: An active process of breathing in, crucial for
gas exchange.
Kussmaul Respirations: Deep, slow, or rapid breathing
often associated with metabolic acidosis, such as in diabetic
ketoacidosis.
Ventilation vs. Perfusion
Definitions and Importance
Ventilation: Refers to the movement of air in and out of the
lungs, essential for gas exchange.
Perfusion: The circulation of blood through the pulmonary
capillaries, where gas exchange occurs.
Effective oxygenation requires both adequate ventilation
and perfusion; a deficiency in either can lead to respiratory
failure.
Conditions such as pulmonary embolism can impair
perfusion, while asthma can affect ventilation.
Understanding the balance between these two processes is
critical in managing respiratory conditions.
Clinical assessments often involve measuring both
ventilation and perfusion to diagnose respiratory issues.
Assessment Key Concepts
Key Respiratory Terms and Definitions
Definitions of Key Terms
Anoxia: The absence or almost complete absence of oxygen
from inspired gases, arterial blood, or tissues.
Apnea: Absence of spontaneous breathing, which can lead
to hypoxia if prolonged.
Bradypnea: A decrease in respiratory rate, often indicative
of underlying health issues.
Cheyne-Stokes Respirations: A pattern of deep fast
breathing alternating with slow shallow respirations, often
seen in patients nearing death.
Dyspnea: Difficulty breathing, which can be a symptom of
various respiratory conditions.
Eupnea: Normal adult breathing rate of 12–20 breaths/min,
indicating effective ventilation.
Additional Respiratory Terms
Expiration: A passive process of breathing out, essential for
removing carbon dioxide from the body.
Hyperventilation: Overbreathing often caused by anxiety,
leading to decreased CO₂ levels in the blood.
, Hypoxemia: Insufficient oxygen in the blood, which can
lead to tissue hypoxia if severe.
Hypoxia: A condition where SpO₂ is less than 90%,
indicating inadequate oxygen supply at the tissue level.
Inspiration: An active process of breathing in, crucial for
gas exchange.
Kussmaul Respirations: Deep, slow, or rapid breathing
often associated with metabolic acidosis, such as in diabetic
ketoacidosis.
Ventilation vs. Perfusion
Definitions and Importance
Ventilation: Refers to the movement of air in and out of the
lungs, essential for gas exchange.
Perfusion: The circulation of blood through the pulmonary
capillaries, where gas exchange occurs.
Effective oxygenation requires both adequate ventilation
and perfusion; a deficiency in either can lead to respiratory
failure.
Conditions such as pulmonary embolism can impair
perfusion, while asthma can affect ventilation.
Understanding the balance between these two processes is
critical in managing respiratory conditions.
Clinical assessments often involve measuring both
ventilation and perfusion to diagnose respiratory issues.
