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Pulmonary

Definitions

TermDefinition
Tidal volume (TV) Volume moved into or out of the respiratory tract during a normal respiratory cycle
Inspiratory reserve volume (IRV) Maximum volume that can be moved into the respiratory tract after a normal inspiration
Expiratory reserve volume (ERV) Maximum volume that can be moved out of the respiratory tract after a normal expiration
Residual volume (RV) Volume remaining in the respiratory tract after maximum expiration
Functional residual capacity (FRC) The amount of air left in the lungs at the end of a normal expiration
Alveolar ventilation The volume of inspired air that actually reaches, or “ventilates,” the alveoli.
Eupnea Term used to describe normal quiet breathing
Hyperpnea Increased breathing that is regulated to meet an increased demand by the body for oxygen
Hyperventilation An increase in pulmonary ventilation in excess of the need for oxygen
Hypoventilation A decrease in pulmonary ventilation that results in elevated blood levels of carbon dioxide
Dyspnea Refers to labored or difficult breathing and is often associated with hypoventilation
Cheyne-Stokes respiration (CSR) Is characterized by cycles of gradually increasing tidal volume for several breaths followed by several breaths with gradually decreasing tidal volume. These cycles repeat in a type of crescendo-decrescendo pattern.
Created by: Aulii808
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