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10 Cards in this Set
- Front
- Back
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What is the pressure necessary to open the alveoli?
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The peak pressure
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What is static compliance?
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Reflects the stiffness of the lung and the chest wall
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What is normal static complicance?
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50-100 ml/cmH2O
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What is the formula for static compliance?
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Cstat = TV/Plateu pressure - PEEP
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What increases static compliance?
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emphysema, PEEP, relief of abdominal distention
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What decreases static compliance?
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Pulmonary edema, atelectasis, pneumothorax, pneuomina, intertitial fibrosis, anesthesia/paralysis, ascietes, external compression of the chest, obestity, kyphoscoliosis
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What causes decreased dynamic compliance?
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bronchospasm, mucous plugging, kinked ETT
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What causes frequency dependence of compliance?
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Small airway disfunction, decreased dynamic compliance w/ increased respiratory rate.
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When does frequency dependence of compliance occur?
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When Cdyn is less than 80% of Cstat w/ an increased respiratory rate.
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What is the formula for airway resistance?
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(Palv-Pmouth)/flow
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