Lung Compliance – Factors Affecting Pulmonary Ventilation (Nursing)

by Jasmine Clark

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    00:01 So the third factor that can affect pulmonary ventilation is lung compliance.

    00:06 Lung compliance is the measure of a change in the lung volume that occurs with a given change in our transpulmonary pressure.

    00:14 And basically it measures how much stretch the long has.

    00:21 Our lung compliance is normally pretty high and this is due to the distance ability of the lung tissue.

    00:27 Remember, there's a lot of elastic fibers and it's a pretty spongy organ, so there's a lot of ability to stretch.

    00:35 Also because of the surfactant that is secreted by the type to alveolar cells.

    00:40 We also have a decreased alveolar surface tension.

    00:44 So this allows for the lungs to be able to expand pretty easily.

    00:50 Higher lung compliance means that it's easier to expand the lungs.

    00:56 We can explain lung compliance mathematically as well.

    01:01 In this compliance is equal to a change in the volume of the lungs over the transpulmonary pressure or the intrapulmonary pressure minus the intrapleural pressure.

    01:16 Compliance can be diminished by things such as fibrosis which causes our lungs to lose some of its elastic tissue and be replaced by scar tissue.

    01:28 It can also be decreased by a reduction in the production of surfactant, which makes our alveoli smaller or more likely to collapse and lastly it can be reduced by a decrease in the flexibility of our thoracic cage.

    01:46 So for example, if we have an injury that makes it harder for us to really expand our lung or expand our rib cage.

    01:55 This can also reduce lung compliance as well, since the lungs move with the thoracic cavity.

    About the Lecture

    The lecture Lung Compliance – Factors Affecting Pulmonary Ventilation (Nursing) by Jasmine Clark is from the course Respiratory System – Physiology (Nursing).

    Included Quiz Questions

    1. Non-elastic scar tissue replacing lung tissue
    2. Decreased flexibility of the thoracic cage
    3. Reduced production of surfactant
    4. Increased production of surfactant
    5. Increased flexibility of the thoracic cage

    Author of lecture Lung Compliance – Factors Affecting Pulmonary Ventilation (Nursing)

     Jasmine Clark

    Jasmine Clark

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