The nurse should include the purpose of promoting elimination of CO2
People who use the purse-lip breathing method can regulate their ventilation and oxygenation. In order to use the method, one must inhale via the nose and exhale slowly and deliberately through the mouth. When compared to the inspiration to expiration ratio in normal breathing, the expiratory phase of respiration will be longer. The action appears as a controlled inhalation via the nostril followed by an expiration through lips that seem puckered or pursed. Through the use of this approach, a little amount of positive end-expiratory pressure is produced (PEEP).
When there is an increase in carbon dioxide levels, the central chemoreceptors are triggered to immediately increase the rate of respiration in an effort to restore the body's pH to a baseline range of approximately 7.4 in a healthy individual. During exhalation, the forces cause the airways that lack cartilage to drag inward towards the lumen obstructing airflow by increasing airway resistance, which may lead to carbon dioxide trapping.
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