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lung compliance

   Also found in: Wikipedia 0.01 sec.
lung compliance,
a measure of the ease of expansion of the lungs and thorax, determined by pulmonary volume and elasticity. A high degree of compliance indicates a loss of elastic recoil of the lungs, as in old age or emphysema. Decreased compliance means that a greater change in pressure is needed for a given change in volume, as in atelectasis, edema, fibrosis, pneumonia, or absence of surfactant. Dyspnea on exertion is the main symptom of diminished lung compliance.

lung compliance


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Impaired oxygenation and decreased lung compliance account for the shortness of breath and the increased respiratory rate.
Manual hyperinflation with a positive end expiratory pressure value of 0-15 cmH2O has been shown to improve lung compliance and reduce airway resistance, and can generate flow rates that mobilise secretions (Choi and Jones 2005, Savian et al 2005).
Secondly, those with lung infiltrates due to pneumonia, ARDS, aspiration or cardiogenic pulmonary oedema and accumulation of fluid in the alveoli, which decrease lung compliance.
 
 
 
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