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A unique form of Wright respirometer specifically designed for use with newborns and infants to 20 kg. in weight. Incorporates the latest enlarged face and. A set of standard instructions was given to all patients. We made a manual to standardize the measurements between the therapists. The relative and absoluteSpirometry, which means “the measuring of breath,” is a routinely used pulmonary function test (PFT) that measures the amount and speed of air that a person