An integrated microprocessor-based system enhanced with graphics for the evaluation of slope-ratios and other...

A microprocessor-based system is developed to measure and analyse flow-volume curves produced from forced expiratory manoeuvres. The system evaluates the slope-ratio parameter and displays it as a scaled plot against fractions of vital capacity together with a scaled plot of the flow-volume curves on a graphic display. Other conventional parameters and their predicted values are also calculated. Freedom is allowed for the operator to select or reject manoeuvres from several runs. The system is easily run and guided even by an operator with no programming knowledge.