Pulmonary Disease. NFSC 470 McCafferty. Components of the Respiratory System. Drive Mechanism Pumping Mechanism Gas Exchange Organs. Drive Mechanism Controls breathing patterns Sensitive to hypoxia and hypercarbia Modulated by the CNS Brainstem governs automatic respiration
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Inspiration is usually active – major role in pumping mechanism.
Expiration is usually passive.
Thoracic cage supplies exhaled air to voice apparatus (larynx)
Nature of lung inflation affects pressure in thoracic cage; can affect heart i.e. pulmonary edema
I. Partial Pressure: used to indicate the amount of any gas in the atmosphere, alveoli, or plasma
↑ PCO2 means poor respiratory function
↓ PCO2 means hyperventilation
Steroids (anti-inflammatory) cause protein catabolism, gluconeogenesis, muscle wasting and neg. N balance.
Choice of low fiber foods (2’ dyspnea); poor peristalsis 2’ O2 to GI tract.
A. surfactant production