Which physical assessment technique would be used to determine the AP:lateral ratio?

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The AP:lateral ratio, which refers to the anteroposterior (front to back) diameter compared to the lateral (side to side) diameter of the chest, is assessed through inspection. This is a visual examination to determine if the chest has a normal shape or if it exhibits signs of conditions like barrel chest, often seen in chronic obstructive pulmonary disease (COPD).

Which Physical Assessment Technique Would Be Used to Determine the AP:lateral