Define lung compliance (30% marks). Describe how is it measured (70% marks).

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College Answer

This is a core area of physiology that relates to everyday Intensive Care practice, thus it was 
expected that more than the observed number of candidates would have scored well. Candidates 
performed poorly purely from a lack of sufficient knowledge. Easy marks were to be gained 
purely by mentioning that compliance is defined by ∆V/∆P, the ∆P being the gradient from 
alveolar – intrapleural, normal values, static and dynamic compliance. Good answers would then 
include a mention of how static and dynamic compliance is measured (specifically how volume 
and pressures are measured.